Iranian Polymer Journal最新文献_第3页

Carboxylated graphene oxide-reinforced polyvinyl alcohol/soy protein composite fibers: thermal and mechanical study 羧基氧化石墨烯增强聚乙烯醇/大豆蛋白复合纤维：热学和力学研究

IF 2.4 3区化学

Iranian Polymer Journal Pub Date : 2024-08-13 DOI: 10.1007/s13726-024-01368-9

Hao Li, Yingbo Chen, Pengfei Li, Ke Zhao

{"title":"Carboxylated graphene oxide-reinforced polyvinyl alcohol/soy protein composite fibers: thermal and mechanical study","authors":"Hao Li, Yingbo Chen, Pengfei Li, Ke Zhao","doi":"10.1007/s13726-024-01368-9","DOIUrl":"10.1007/s13726-024-01368-9","url":null,"abstract":"<div><p>The environmental crisis caused by the use of petroleum-based fibers and the massive depletion of petroleum resources threaten the sustainable development of mankind. Therefore, regenerated protein fibers have gained widespread attention for their green credentials, ingenuity and excellent compatibility. In this work, polyvinyl alcohol (PVA)/soy protein (SP)-carboxylated graphene oxide (GO–COOH) (PVA/SP–GO–COOH) composite fibers were prepared by wet spinning of aqueous solution containing PVA, SP, and GO-COOH. The composite fibers were analyzed for their morphology, structure, thermal stability, and mechanical properties. The results indicated that the composite fibers have both the glossy properties of SP and excellent mechanical properties of PVA. This was attributed to the good dispersion and compatibility of SP and GO–COOH in the PVA matrix. When GO–COOH was added at 0.5% (by weight), the tensile strength of the composite fibers reached 3.29 cN/dtex and the Young’s modulus was 113.92 cN/dtex, which increased by 87% and 67%, respectively, as compared to that of the pure PVA fiber. The moisture regains of the composite fibers reached 8.27%. Furthermore, the maximum decomposition temperature reached 326.7 °C and the thermal stability of the composite fibers increased due to the shielding effect of GO–COOH and formation of hydrogen bonding with the polymer.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":"34 2","pages":"187 - 199"},"PeriodicalIF":2.4,"publicationDate":"2024-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142209403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cell viability assessment and physicomechanical characterization of Juglans regia leaf fiber-reinforced poly(hydroxybutyrate) films for biomedical uses 用于生物医学用途的雷公藤叶纤维增强聚（羟基丁酸）薄膜的细胞活力评估和物理机械特性分析

IF 2.4 3区化学

Iranian Polymer Journal Pub Date : 2024-08-12 DOI: 10.1007/s13726-024-01367-w

Simran Ahuja, Neha Bansal, Mahak Mittal, Kapil Gulati, Ashwani Mittal, Sanjiv Arora

{"title":"Cell viability assessment and physicomechanical characterization of Juglans regia leaf fiber-reinforced poly(hydroxybutyrate) films for biomedical uses","authors":"Simran Ahuja, Neha Bansal, Mahak Mittal, Kapil Gulati, Ashwani Mittal, Sanjiv Arora","doi":"10.1007/s13726-024-01367-w","DOIUrl":"10.1007/s13726-024-01367-w","url":null,"abstract":"<div><p>The present study aims to explore the cytotoxicity, physicomechanical, thermal, and barrier properties of <i>Juglans regia</i> leaf fiber (J) reinforced PHB-based films, with a focus on evaluating their suitability for biomedical applications. In this work, scaffolds are developed by incorporating varying concentrations (0.5%, 1%, 1.5%, 2% and 2.5%) of J into poly(hydroxybutyrate)/poly(vinylacetate) matrix by solvent casting. These are characterized through Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), thermo-gravimetric analysis (TGA), differential scanning calorimetry (DSC), and dynamic mechanical analysis (DMA). The results indicated that the sample containing 1.0% (by weight) J (PJ1.0) results in maximum values of the tensile strength (25 MPa) and storage modulus (1.61 GPa) at – 20 °C. Moreover, this sample exhibited favorable thermal, water barrier, and wettability properties. The hydrolytic degradation behavior of the composites is also studied at pH 7.4 and 37 °C for 16 weeks. It is observed that PJ1.0 degrades by 45%, whereas PHB experiences 18% degradation. Furthermore, the cytotoxic nature of the scaffolds is also assessed using C2C12 mouse skeletal muscle cell lines. The results confirmed that PJ1.0 does not show any cytotoxic effects when compared to pure PHB. Thus, findings of this study suggested the potential of <i>Juglans regia</i> fiber for the development of sustainable and mechanically robust materials for biomedical applications.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":"34 2","pages":"171 - 185"},"PeriodicalIF":2.4,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141941258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Epoxy-alumina functionally graded nanocomposites: gradation and morphological effect of alumina on impact strength and viscoelastic properties 环氧-氧化铝功能分级纳米复合材料：氧化铝的分级和形态对冲击强度和粘弹性能的影响

IF 2.4 3区化学

Iranian Polymer Journal Pub Date : 2024-08-08 DOI: 10.1007/s13726-024-01366-x

Sudhir Kumar Mishra, Dharmendra Kumar Shukla, Rabindra Kumar Patel

{"title":"Epoxy-alumina functionally graded nanocomposites: gradation and morphological effect of alumina on impact strength and viscoelastic properties","authors":"Sudhir Kumar Mishra, Dharmendra Kumar Shukla, Rabindra Kumar Patel","doi":"10.1007/s13726-024-01366-x","DOIUrl":"10.1007/s13726-024-01366-x","url":null,"abstract":"<div><p>This article presents an experimental investigation of low-velocity impact and dynamic mechanical testing of epoxy-aluminium oxide (alumina), functionally graded nanocomposite for the above two different directions of loading. Two different morphologies (rod and spherical) of alumina nanoparticles were diffused in epoxy resin by ultrasonication technique. Functionally graded polymer nanocomposites (FGPNCs) were prepared by varying the weight percentage (% by weight) of nanoparticles in the thickness direction. Sequential casting was adopted for synthesizing the nanocomposite layers having 0%, 0.25%, 0.5%, 0.75% and 1% (by weights) of nanoparticles in a vertical acrylic mould. Transmission electron micrographs showed a uniform dispersion of alumina nanoparticles within the FGPNCs. FGPNC containing nanorods and spherical nanoparticles exhibited improvement of 11% and 8%, respectively, compared to neat epoxy when impacted from the direction of the nanocomposite layer. Whereas, when the impact was from the direction of the neat epoxy layer, the impact strength of FGPNC having nanorods improved by 7% while only a slight increment in the impact strength of FGPNC having spherical nanoparticles was observed in comparison to neat epoxy. Field emission scanning electron micrographs (FESEM) of the fractured surfaces revealed the responsible toughening mechanisms of FGPNCs for different impact loadings. Gradation and addition of alumina nanoparticles in epoxy had a stronger effect on the storage modulus in the rubbery region compared to the glassy region. In the rubbery region, the storage modulus of FGPNC (nanorods) and FGPNC (spherical) was recorded three times and two times higher than that in the glassy region, respectively, when the samples were loaded from the direction of the nanocomposite layer.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":"34 2","pages":"157 - 169"},"PeriodicalIF":2.4,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141925967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Polycarbonate ultrafiltration membrane modified with Mg–Al-layered double hydroxide nanoparticles for treatment of petroleum refinery wastewater 用 Mg-Al 层状双氢氧化物纳米粒子改性的聚碳酸酯超滤膜用于处理石油精炼废水

IF 2.4 3区化学

Iranian Polymer Journal Pub Date : 2024-08-04 DOI: 10.1007/s13726-024-01364-z

Masoumeh Zaremanesh, Habib Etemadi, Erfan Shafaati, Ghader Hosseinzadeh, Alireza Yousefi

{"title":"Polycarbonate ultrafiltration membrane modified with Mg–Al-layered double hydroxide nanoparticles for treatment of petroleum refinery wastewater","authors":"Masoumeh Zaremanesh, Habib Etemadi, Erfan Shafaati, Ghader Hosseinzadeh, Alireza Yousefi","doi":"10.1007/s13726-024-01364-z","DOIUrl":"10.1007/s13726-024-01364-z","url":null,"abstract":"<div><p>In this work, to improve the antifouling and separation performance of polycarbonate (PC) membranes in the petroleum refinery wastewater treatment, various amounts of magnesium–aluminum (Mg–Al)-layered double hydroxide (LDH) nanoparticles (0–2 wt%) were incorporated into PC membrane, for the first time. The Fourier transform infrared (FTIR), X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) characterizations confirmed the synthesis of Mg–Al LDH structure through the hydrothermal method, with different counter anions including nitrate (NO<sub>3</sub><sup>−</sup>) and carbonate (CO<sub>3</sub><sup>2−</sup>) presented in the interlayer spaces. The characteristics of the fabricated membranes were investigated using water contact angle and porosity analyses, FESEM and atomic force microscopy (AFM) techniques and mechanical properties. All membranes modified with Mg–Al LDH hydrophilic nanoparticles showed a lower water contact angle and higher porosity as compared to the neat PC membrane. The FESEM micrographs of the cross section of the membrane indicated that the inclusion of CO<sub>3</sub>.Mg–Al LDH nanoparticles in the PC matrix led to the removal of the sponge-like layer of the membrane. The results of the petroleum refinery wastewater filtration experiment revealed that the irreversible fouling ratio (IFR) value decreased from 66.7% for the neat PC membrane to 10.5% and 19.1% for PC/CO<sub>3</sub> Mg–Al LDH-1.5 and PC/NO<sub>3</sub> Mg–Al LDH-1.5 nanocomposite membranes, respectively. The membrane separation performance, measured by the total organic carbon (TOC) indicated that filtrates from all nanocomposite membranes had lower TOC values compared to the neat PC membrane.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":"34 2","pages":"143 - 155"},"PeriodicalIF":2.4,"publicationDate":"2024-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141941260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Long-chain branched copolyesters based on butylene succinate and ethylene terephthalate: synthesis, characterization, thermal and rheological properties 基于丁二酸丁二醇酯和对苯二甲酸乙二醇酯的长链支化共聚物：合成、表征、热性能和流变性能

IF 2.4 3区化学

Iranian Polymer Journal Pub Date : 2024-08-04 DOI: 10.1007/s13726-024-01358-x

Rezvene Nayeb Abbasi, Mehdi Rafizadeh

{"title":"Long-chain branched copolyesters based on butylene succinate and ethylene terephthalate: synthesis, characterization, thermal and rheological properties","authors":"Rezvene Nayeb Abbasi, Mehdi Rafizadeh","doi":"10.1007/s13726-024-01358-x","DOIUrl":"10.1007/s13726-024-01358-x","url":null,"abstract":"<div><p>The introduction of long-chain branches can significantly increase the melt strength and processability of the polyesters. Hence, in the present study, a number of long-chain branched copolyesters were synthesized and the effect of branching agent on the properties of copolyesters was examined. Pentaerythritol (PER) and trimellitic anhydride (TMA) were used as branching agents for the synthesis of poly(butylene succinate-<i>co</i>-ethylene terephthalate) (PBSET). Microstructure and composition of the copolyesters were characterized by <sup>1</sup>H. NMR and their successful synthesis were corroborated. DSC test proved the semi-crystalline nature of copolymers and corroborated the crystallinity decrement with branching. The crystallinity decreased by 30–47%, when long-chain branches were formed in PBEST. Interestingly, no secondary crystallization was observed using the Avrami model. Furthermore, the Avrami exponent was in the range of 2.5–4.5, signifying a 3D-crystal growth. According to the shear viscosity measurement, the branched copolymers revealed more shear thinning behavior compared to their linear counterparts, and according to the elongational viscosity measurement, the PER branched copolymer displayed a stronger strain hardening response compared to its linear and TMA branched counterparts. Moreover, the shear modulus was raised by two orders of magnitude with branching. Having higher entanglement and less mobility, the long-chain branched copolyesters displayed longer relaxation times compared to their linear counterpart. Despite the outstanding feature of the TMA, its inclusion more than 0.4% (per mol) was not possible due to its declining effect on copolymer extensibility.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":"33 12","pages":"1765 - 1778"},"PeriodicalIF":2.4,"publicationDate":"2024-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s13726-024-01358-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141941259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploring biodegradable polymer composites for sustainable packaging: a review on properties, manufacturing techniques, and environmental impacts 探索用于可持续包装的可生物降解聚合物复合材料：性能、制造技术和环境影响综述

IF 2.4 3区化学

Iranian Polymer Journal Pub Date : 2024-08-03 DOI: 10.1007/s13726-024-01365-y

Maziyar Sabet

{"title":"Exploring biodegradable polymer composites for sustainable packaging: a review on properties, manufacturing techniques, and environmental impacts","authors":"Maziyar Sabet","doi":"10.1007/s13726-024-01365-y","DOIUrl":"10.1007/s13726-024-01365-y","url":null,"abstract":"<div><p>Biodegradable polymer composites (BPCs) emerge as a promising solution to the escalating plastics pollution crisis. This review comprehensively analyzes their multifaceted properties, including mechanical strength, gas barrier function, and biodegradation rates, emphasizing their potential for tailored applications in food, beverage, and pharmaceutical packaging. By delving into the optimization of BPC characteristics, we illustrate how these materials can enhance product integrity and extend shelf life, crucial for maintaining the quality and safety of packaged goods. Scalable and cost-effective manufacturing techniques are critically examined, aiming to bridge the gap toward commercial viability and widespread adoption of BPCs. Beyond biodegradability, the adherence to stringent environmental standards is emphasized, promoting a circular economy within packaging through material recovery and reintegration processes. Life cycle assessment (LCA) studies are incorporated to provide a holistic environmental perspective, evaluating the overall impact of BPCs from production to disposal. Industry perspectives are integrated to assess the economic feasibility of BPC adoption across diverse sectors, analyzing potential cost benefits and challenges in integrating BPCs into existing production lines. Finally, the evolving regulatory landscape surrounding BPCs is addressed, highlighting both challenges and opportunities for their widespread adoption. This comprehensive analysis serves as a valuable resource for industry and academia, advocating for BPCs as a crucial step toward a sustainable future for packaging, combining environmental responsibility with practical application.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":"34 1","pages":"123 - 142"},"PeriodicalIF":2.4,"publicationDate":"2024-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141941261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Application of ultrasonic radiation for the development of polypropylene/multi-walled carbon nanotubes nanocomposites and its effect on the PP chemical degradation 超声辐射在聚丙烯/多壁纳米碳管纳米复合材料开发中的应用及其对聚丙烯化学降解的影响

IF 2.4 3区化学

Iranian Polymer Journal Pub Date : 2024-07-27 DOI: 10.1007/s13726-024-01360-3

J. G. Martínez-Colunga, V. J. Cruz-Delgado, S. Sánchez-Valdés, J. M. Mata-Padilla, L. F. Ramos-de Valle, A. B. Espinoza-Martínez, R. Benavides, E. Ramírez-Vargas, J. A. Rodriguez-Gonzalez, J. F. Lara-Sanchez, T. Lozano-Ramirez

{"title":"Application of ultrasonic radiation for the development of polypropylene/multi-walled carbon nanotubes nanocomposites and its effect on the PP chemical degradation","authors":"J. G. Martínez-Colunga, V. J. Cruz-Delgado, S. Sánchez-Valdés, J. M. Mata-Padilla, L. F. Ramos-de Valle, A. B. Espinoza-Martínez, R. Benavides, E. Ramírez-Vargas, J. A. Rodriguez-Gonzalez, J. F. Lara-Sanchez, T. Lozano-Ramirez","doi":"10.1007/s13726-024-01360-3","DOIUrl":"10.1007/s13726-024-01360-3","url":null,"abstract":"<div><p>The effects of ultrasound on the chemical structure of polypropylene (PP) and its composites with different MWCNT content were investigated. The PP composites with 0%, 1%, 3%, and 5% (by weight) MWCNT were extruded using a traditional single-screw extruder and immediately US irradiated in a static mixer. The chemical structure of PP was characterized by using FTIR, DSC, TGA, and GPC to determine any changes caused by the ultrasound, and the MWCNT structure by scanning electron microscopy (SEM). The PP/MWCNT composites were characterized using Raman spectroscopy, DSC, TGA, and SEM, and tested for tensile properties, thermal stability, and electrical and thermal conductivity. The results showed that ultrasonic irradiation caused a slight oxidation in the PP structure and a 13% reduction in its molecular weight. An increase in PP crystallinity, attributed to the improved nucleating effect of the nanotubes, was also observed as a consequence of ultrasonic irradiation. The sonicated PP/MWCNT composites exhibited better dispersion of nanotubes within the PP matrix, resulting in a 30% increment in the elasticity modulus, 45 °C higher for thermal decomposition, an 11 orders of magnitude enhanced volume resistivity, and a 25% increment in thermal conductivity. Furthermore, the SEM results showed that the MWCNT structure was maintained during processing, thanks to the low shear stresses provided by the single-screw extruder, but keeping dispersion with the ultrasonic static mixer.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><img></picture></div></div></figure></div></div>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":"33 12","pages":"1751 - 1764"},"PeriodicalIF":2.4,"publicationDate":"2024-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141770787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An optimized hybrid graphite/boron nitride polymer nanocomposite: enhancement in characteristic properties 优化的石墨/氮化硼杂化聚合物纳米复合材料：特性的增强

IF 2.4 3区化学

Iranian Polymer Journal Pub Date : 2024-07-23 DOI: 10.1007/s13726-024-01361-2

Debamita Mohanty, Smita Mohanty, Debmalya Roy, Sakti Ranjan Acharya, Arun Kumar

{"title":"An optimized hybrid graphite/boron nitride polymer nanocomposite: enhancement in characteristic properties","authors":"Debamita Mohanty, Smita Mohanty, Debmalya Roy, Sakti Ranjan Acharya, Arun Kumar","doi":"10.1007/s13726-024-01361-2","DOIUrl":"10.1007/s13726-024-01361-2","url":null,"abstract":"<div><p>Hybrid nanocomposites have been synthesized utilizing epoxy (E) and varying weight percentages of carbon nanotube (CNT), exfoliated graphite (EG), boron nitride (BN), and graphene (GR) as fillers. The incorporation of these nanofillers into the epoxy matrix led to significant enhancement in mechanical and thermal properties of the matrix polymer. Two specific nanocomposite formulations were optimized, one comprising 0.2% (by weight) CNT and 0.3% (by weight) BN (E/CNT<sub>1</sub>/BN<sub>2</sub>), and the other comprising 0.2% (by weight) CNT and 0.5% (by weight) EG (E/CNT<sub>1</sub>/EG<sub>3</sub>). These formulations demonstrated optimized mechanical properties like impact strength, tensile strength, thermal conductivity, and flexural strength with values of 31.46 ± 4 kJ/m<sup>2</sup>, 50.35 ± 4 MPa, 0.201 W/(mK), and 97.57 ± 3 MPa in case of E/CNT<sub>1</sub>/EG<sub>3</sub>, and 37.19 ± 3 kJ/m<sup>2</sup>, 54.59 ± 5 MPa, 0.224 W/(mK), and 116.37 ± 6 MPa for E/CNT<sub>1</sub>/BN<sub>2</sub> nanocomposite. The incorporation of fillers also resulted in notable enhancements in thermal properties, as evidenced from differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and dynamic mechanical analysis (DMA) results. The structural and morphological properties of the nanocomposite were analyzed using scanning electron microscopy (SEM). Furthermore, flame properties of the optimized composite were investigated through cone calorimetry tests while the corresponding char residue was analyzed by employing SEM.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":"33 12","pages":"1779 - 1791"},"PeriodicalIF":2.4,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141770793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Estimation and optimization of nerve cells’ proliferation on electrospun nanofibrous scaffolds 电纺纳米纤维支架上神经细胞增殖的估算与优化

IF 2.4 3区化学

Iranian Polymer Journal Pub Date : 2024-07-23 DOI: 10.1007/s13726-024-01347-0

Fatemeh Zamani, Mohammad Amani-Tehran

{"title":"Estimation and optimization of nerve cells’ proliferation on electrospun nanofibrous scaffolds","authors":"Fatemeh Zamani, Mohammad Amani-Tehran","doi":"10.1007/s13726-024-01347-0","DOIUrl":"10.1007/s13726-024-01347-0","url":null,"abstract":"<div><p>Due to the importance of electrospun nanofibrous scaffolds in tissue engineering to regenerate and repair nerve injuries, the main purpose of this study is to present an optimized physical structure of poly(lactic-<i>co</i>-glycolic acid) (PLGA) nanofibrous scaffold as a biodegradable polymer that can increase nerve cells’ growth and proliferation. The effect of each scaffold property on the proliferation of the cells is assessed by estimating and modeling the rate of cell proliferation based on the scaffold’s structural characteristics, and the cell growth behavior is analyzed considering the changes in physical properties. Also, a statistical model is presented to estimate and optimize the number of proliferated cells by simultaneously considering the most effective electrospinning parameters related to the scaffold’s physical structure, utilizing the response surface methodology. The obtained results introduce the scaffold and fiber’s porosity as the most important scaffold property on cell growth enhancement. The optimal amounts of initial properties are 3% (w/v) and 2.5 m/s for solution concentration, and the collector linear velocity, respectively, based on the designed model, as well as the amount of the optimum estimated results is 1.359, which did not have a significant difference with the experimental results of these points. The scaffold suggested by the model had proper fiber alignment and diameter, providing the most optimal structure, adhesion, and cell proliferation in the desired direction by generating optimum porosity and hydrophilicity.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":"33 12","pages":"1713 - 1724"},"PeriodicalIF":2.4,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141785019","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Kinetics study of catalytic pyrolysis of polystyrene polymer using response surface method 利用响应面法对聚苯乙烯聚合物催化热解进行动力学研究

IF 2.4 3区化学

Iranian Polymer Journal Pub Date : 2024-07-22 DOI: 10.1007/s13726-024-01362-1

Nasrollah Majidian, Mahyar Saleh, Mohammad Samipourgiri

{"title":"Kinetics study of catalytic pyrolysis of polystyrene polymer using response surface method","authors":"Nasrollah Majidian, Mahyar Saleh, Mohammad Samipourgiri","doi":"10.1007/s13726-024-01362-1","DOIUrl":"10.1007/s13726-024-01362-1","url":null,"abstract":"<div><p>The present study investigates the kinetics of polystyrene catalytic pyrolysis using the response surface method. Polystyrene is one of the most widely used polymers that decomposes slowly in the environment. Two models (nth-order reaction and first-order reaction) have been employed to examine the catalytic pyrolysis process. One-liter hydrothermal reactor is filled with 100 g of polystyrene granules that have an estimated diameter of 1 mm and an Iranian natural zeolite catalyst. 100 mL of <i>n</i>-hexane and the catalyst are added to the reactor for improved mixing and to stop the catalyst particles from escaping. Then, the reactor is sealed and when the polymer melts down, nitrogen gas is injected with a flow rate of 100 mL/min. Three variables of time (30–120 min), temperature (100–300 °C), and the amount of catalyst (2, 4, 6 g) were selected as independent variables. For statistical analysis, the second-order model (response surface methodology) was used to find the relationship between independent and dependent variables. The results have shown that temperature and time have a significant effect on pyrolysis efficiency and the Group Method of Data Handling neural network was used to investigate the effect of parameters such as time, temperature, amount of catalyst, polystyrene amount, and pyrolysis mass volume. The findings illustrated that temperature has the greatest effect on the pyrolysis product and the results of kinetic investigation have shown that the nth-order reaction is more suitable for the kinetic justification of all experimental data because the degree of compatibility between experimental data and modeling results is higher than the first-order reaction.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":"33 12","pages":"1793 - 1806"},"PeriodicalIF":2.4,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141742488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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