Polymer Bulletin最新文献_第2页

Active edible food packaging materials for confectionery products: applications, challenges, and future directions 糖果产品的活性食用食品包装材料：应用、挑战和未来方向

IF 3.1 3区化学

Polymer Bulletin Pub Date : 2024-12-24 DOI: 10.1007/s00289-024-05604-3

Moslem Sabaghi

引用次数: 0

Probing the effects of chitosan-based membranes with different molecular weights on their biocompatibility and antimicrobial activity 探讨不同分子量壳聚糖基膜对其生物相容性和抗菌活性的影响

IF 3.1 3区化学

Polymer Bulletin Pub Date : 2024-12-23 DOI: 10.1007/s00289-024-05619-w

Juliana Bezerra Macedo, Daniela Bezerra Macedo, Cintia Cristina Santi Martignago, Ana Claudia Muniz Renno, Rafaela Cristina Sanfelice, Carla Roberta Tim, Lívia Assis, Adriana Pavinatto

{"title":"Probing the effects of chitosan-based membranes with different molecular weights on their biocompatibility and antimicrobial activity","authors":"Juliana Bezerra Macedo, Daniela Bezerra Macedo, Cintia Cristina Santi Martignago, Ana Claudia Muniz Renno, Rafaela Cristina Sanfelice, Carla Roberta Tim, Lívia Assis, Adriana Pavinatto","doi":"10.1007/s00289-024-05619-w","DOIUrl":"10.1007/s00289-024-05619-w","url":null,"abstract":"<div><p>Chitosan is a polysaccharide widely used in biomedical applications due to its bioactivity, which can be modulated by its structural characteristics. Among these, molecular weight is one of those that most influences its action. In this context, this study aimed to evaluate the bioactivity of membranes formed by high (HMWChi) and low (LMWChi) molecular weight chitosans and associated with turmeric (HMWChi/Tur and LMWChi/Tur), produced by the casting technique. The membranes were characterized physicochemically and morphologically. Its bioactivity was evaluated through the inhibition halo formed on bacterial strains and verifying its biocompatibility in fibroblast cell lines (L929), performed by alamarBlue® (Metabolic activity/viability) and <i>PicoGreen</i> assays (DNA proliferation). Self-supporting and homogeneous membranes were obtained. FTIR spectra show the main vibrational bands for the chemical groups of chitosan and contact angle results show that turmeric-containing membranes are more hydrophilic than pure chitosan. The presence of the inhibition halo was observed in both bacterial cultures for all membranes, with LMWChi and LMWChi/Tur showing a greater inhibitory effect. The membranes produced did not present a cytotoxic effect, as they induced an increase in cell proliferation. In general, LMWChi/Tur provided greater cell proliferation, suggesting that low molecular weight chitosan is the most promising material for application as dressings.</p></div>","PeriodicalId":737,"journal":{"name":"Polymer Bulletin","volume":"82 7","pages":"2459 - 2474"},"PeriodicalIF":3.1,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143818164","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

Performance of kraft lignin as a filler in PLA composites via the acetic acid casting technique 醋酸铸造法研究硫酸盐木质素在PLA复合材料中的填充性能

IF 3.1 3区化学

Polymer Bulletin Pub Date : 2024-12-21 DOI: 10.1007/s00289-024-05628-9

Jordana Corralo Spada, Alessandra Andrade Lopes, Natália Barros, Júlia Ribeiro Sarkis

{"title":"Performance of kraft lignin as a filler in PLA composites via the acetic acid casting technique","authors":"Jordana Corralo Spada, Alessandra Andrade Lopes, Natália Barros, Júlia Ribeiro Sarkis","doi":"10.1007/s00289-024-05628-9","DOIUrl":"10.1007/s00289-024-05628-9","url":null,"abstract":"<div><p>Poly(lactic acid) (PLA) is a bio-based polymer considered a sustainable alternative to petrochemical-derived plastics. This study explores the solubilization of PLA in acetic acid, aiming to enhance eco-friendly production methods. PLA was exposed to acetic acid concentrations of 50%, 60%, 70%, and 100% at temperatures ranging from 20 to 100 °C, with dissolution times extending up to 24 h. Solubilization was categorized as “dissolved” or “not dissolved” based on visual inspection. Selected samples underwent Fourier transform infrared spectroscopy, thermogravimetric analysis, and X-ray diffraction to evaluate chemical structure, thermal stability, and crystallinity. PLA dissolved within 6 h at temperatures above 80 °C with at least 60% acetic acid, and higher acid concentrations further reduced dissolution times. While the PLA chemical structure showed no significant alterations, thermal stability was slightly reduced, and crystallinity was significantly affected by both solvent concentration and temperature. Films were successfully formed only at 120 °C with 100% acetic acid. Additionally, kraft lignin powder (KLP) derived from Pinus was incorporated into PLA composites through casting in acetic acid, with KLP concentrations of 5%, 10%, and 25%. At 5% KLP, dispersion was good, while higher KLP contents led to particle aggregation. The inclusion of 5% KLP increased hydrophilicity (~ 11%) and reduced tensile strength (~ 40%), likely due to KLP trimodal particle size distribution (0.1 to nearly 500 μm), which made the film matrix more heterogeneous. However, the addition of 5% lignin had minimal impact on composite properties, making it a promising option for cost reduction as lignin is a by-product.</p></div>","PeriodicalId":737,"journal":{"name":"Polymer Bulletin","volume":"82 7","pages":"2419 - 2439"},"PeriodicalIF":3.1,"publicationDate":"2024-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143818063","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

Blueberry-shaped Fe2O3-FeOCl/poly-1H-pyrrole nanocomposite for ultraviolet and visible light sensing 蓝莓状Fe2O3-FeOCl/聚氢吡咯纳米复合材料的紫外和可见光传感

IF 3.1 3区化学

Polymer Bulletin Pub Date : 2024-12-21 DOI: 10.1007/s00289-024-05625-y

Mohamed Rabia, Fatemah H. Alkallas, Tahani A. Alrebdi, Amira Ben Gouider Trabelsi

{"title":"Blueberry-shaped Fe2O3-FeOCl/poly-1H-pyrrole nanocomposite for ultraviolet and visible light sensing","authors":"Mohamed Rabia, Fatemah H. Alkallas, Tahani A. Alrebdi, Amira Ben Gouider Trabelsi","doi":"10.1007/s00289-024-05625-y","DOIUrl":"10.1007/s00289-024-05625-y","url":null,"abstract":"<div><p>A highly efficient Fe<sub>2</sub>O<sub>3</sub>-FeOCl/poly-1H-pyrrole (Fe<sub>2</sub>O<sub>3</sub>-FeOCl/P1HP) nanocomposite thin-film optoelectronic device for photon sensing in both UV and visible light has been successfully fabricated in a one-step process. The synthesis involves the oxidation of 1H-pyrrole using (NH<sub>4</sub>)<sub>2</sub>S<sub>2</sub>O<sub>8</sub> and Fe(NO<sub>3</sub>)<sub>3</sub>, forming a thin-film nanocomposite. With a bandgap of 2.35 eV and a distinctive blueberry-shaped morphology with particle sizes between 10 and 20 nm, this material demonstrates significant potential for light sensing applications. Its performance was assessed through electrical measurements, including current density under both illuminated (J<sub>ph</sub>) and dark (J<sub>o</sub>) conditions. The device produced J<sub>ph</sub> values of 0.23, 0.22, 0.17, and 0.04 mA/cm<sup>2</sup> with Jo measured at 0.005 mA/cm<sup>2</sup> while exposed to photons with energies of 1.8, 2.3, 2.8, and 3.6 eV, i.e., 730, 540, 440, and 340 nm wavelengths, correspondingly. Responsivity (R) was observed to decrease from 2.3 mA/W at 340 nm to 1.8 mA/W at 540 nm, while detectivity (D) fell from 0.52 × 10⁹ Jones to 0.4 × 10⁹ Jones over the same wavelength range. At 730 nm, both R and D values dropped significantly to 0.4 mA/W and 0.1 × 10⁹ Jones, correspondingly. These positive results from the electrical tests highlight the efficiency of the light sensor across both the UV and visible spectra, making it ideal for industrial applications.</p></div>","PeriodicalId":737,"journal":{"name":"Polymer Bulletin","volume":"82 7","pages":"2441 - 2458"},"PeriodicalIF":3.1,"publicationDate":"2024-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143818131","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

Study of core shell structure and its effect on thermal, optical, electrical and magnetic properties of PPY-Ni0.5Co0.5Fe2O4 nanocomposites py - ni0.5 co0.5 fe2o4纳米复合材料芯壳结构及其对其热、光、电、磁性能的影响研究

IF 3.1 3区化学

Polymer Bulletin Pub Date : 2024-12-20 DOI: 10.1007/s00289-024-05606-1

S. Swati, B. Anupama, Rajni Shukla, P. Vikram

{"title":"Study of core shell structure and its effect on thermal, optical, electrical and magnetic properties of PPY-Ni0.5Co0.5Fe2O4 nanocomposites","authors":"S. Swati, B. Anupama, Rajni Shukla, P. Vikram","doi":"10.1007/s00289-024-05606-1","DOIUrl":"10.1007/s00289-024-05606-1","url":null,"abstract":"<div><p>Nanocomposites of polypyrrole (PY) and Ni<sub>0.5</sub>Co<sub>0.5</sub>Fe<sub>2</sub>O<sub>4</sub> (NC) are prepared by chemical oxidation polymerisation with varying amount of NC. X-ray diffraction confirms their synthesis, and crystallite size (D) of NC particles is found to be in nanometre range. Core shell morphology is observed with the help of scanning electron microscope (SEM) images. Effect of this coating of PY on NC nanoparticles in nanocomposites induces variation in thermal stability pattern as compared to pure PY and NC observed by TGA. Although the shift in optical energy band gap is small, there is a complete transformation of magnetic behaviour of PY. It changes from diamagnetic PY to ferromagnetic nanocomposite material due to the ferromagnetic ferrite at the core. Electric conductivity of the NC material is very small which is enhanced by the PY shell material and as a result nanocomposites obtained electric as well as magnetic properties. This makes them valuable materials for electromagnets and electromagnetic shielding materials. Dielectric behaviour of the nanocomposites is also studied using impedance spectroscopy. All the nanocomposite has positive dielectric constant except the one with highest amount of NC which have negative dielectric constant. This unique negative dielectric constant of the nanocomposite is useful in superconductors.</p></div>","PeriodicalId":737,"journal":{"name":"Polymer Bulletin","volume":"82 7","pages":"2405 - 2418"},"PeriodicalIF":3.1,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143818316","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

Magnetic porous superabsorbent: synthesis, characterization, and efficient adsorption of methylene blue 磁性多孔高吸附剂：合成、表征及高效吸附亚甲基蓝

IF 3.1 3区化学

Polymer Bulletin Pub Date : 2024-12-19 DOI: 10.1007/s00289-024-05627-w

Xiangpeng Wang, Yunxiang Zheng, Chunxiao Zhang, Chunmao Chen

引用次数: 0

Synthesis of an O,N-rich porous organic polymer: efficient removal of metronidazole from aqueous solutions 富O， n多孔有机聚合物的合成：水溶液中甲硝唑的高效去除

IF 3.1 3区化学

Polymer Bulletin Pub Date : 2024-12-18 DOI: 10.1007/s00289-024-05626-x

Fatemeh Mozaffari, Mohammad Ali Bodaghifard

{"title":"Synthesis of an O,N-rich porous organic polymer: efficient removal of metronidazole from aqueous solutions","authors":"Fatemeh Mozaffari, Mohammad Ali Bodaghifard","doi":"10.1007/s00289-024-05626-x","DOIUrl":"10.1007/s00289-024-05626-x","url":null,"abstract":"<div><p>Pharmaceutical residues refer to the remnants of drugs used in the medical and food industries that have not fully decomposed. These residues pose a significant threat to human health and natural ecosystems, making them a growing global concern. Porous organic polymers (POPs) show promise as efficient adsorbents for the removal of pharmaceutical pollutants in water. In the present study, an <i>O,N</i>-rich porous organic polymer (ONR-POP) was synthesized via Schiff’s base condensation under solvothermal condition. The performance of the prepared ONR-POP as an adsorbent for the removal of metronidazole from aqueous solutions was evaluated. The structural properties of synthesized ONR-POP were identified by FT-IR, XRD, SEM, EDS, TGA, and BET analyses. The adsorption process of metronidazole using ONR-POP was investigated, and the highest removal efficiency of metronidazole (88%) was achieved after 30 min at 25°C and pH 4. The study of adsorption isotherms and kinetics models indicated that ONR-POP follows the Langmuir adsorption model with a high correlation coefficient of <i>R</i><sup><i>2</i></sup> = 0.991 and a pseudo-second-order kinetic model. Additionally, the thermodynamic data indicate that the adsorption process is exothermic and spontaneous. These results confirm that porous organic polymers can be suitable candidates for the adsorption of pharmaceutical pollutants from water and wastewater.</p></div>","PeriodicalId":737,"journal":{"name":"Polymer Bulletin","volume":"82 7","pages":"2351 - 2372"},"PeriodicalIF":3.1,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143818263","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

Tribological gradients of acid-aged coir and coconut husk powder reinforced LDPE plastic under different normal load conditions for potential applications in oil and gas industries 酸老化椰壳和椰壳粉增强LDPE塑料在不同正常载荷条件下的摩擦学梯度在石油和天然气工业中的潜在应用

IF 3.1 3区化学

Polymer Bulletin Pub Date : 2024-12-18 DOI: 10.1007/s00289-024-05623-0

David O. Obada, Danjuma S. Yawas, Kazeem A. Salami, Ayodeji N. Oyedeji, Abdulrahman Jimoh, Abdulrrahman Abdullahi

引用次数: 0

Healable thermoset polyurethanes with high biomass content driven by dynamic phenol–carbamate bonds 可愈合的热固性聚氨酯与高生物质含量驱动的动态酚氨基甲酸酯键

IF 3.1 3区化学

Polymer Bulletin Pub Date : 2024-12-17 DOI: 10.1007/s00289-024-05620-3

Ryuki Kubota, Mitsuhiro Shibata

{"title":"Healable thermoset polyurethanes with high biomass content driven by dynamic phenol–carbamate bonds","authors":"Ryuki Kubota, Mitsuhiro Shibata","doi":"10.1007/s00289-024-05620-3","DOIUrl":"10.1007/s00289-024-05620-3","url":null,"abstract":"<div><p>Bio-based healable polymer networks have attracted considerable attention because of their carbon neutrality and healability, which lead to long service life. In this study, pyrogallol (PGL), poly(trimethylene glycol) (PO3G), and 1,5-pentamethylene diisocyanate (PDI) produced phenolic polyurethane networks (PUN-PG/PO) with a high biomass content (89–94 wt.%). Most of the PUN-PG/POs displayed two tan δ peaks corresponding to the glass transition of PGL- and PO3G-based segments in the dynamic mechanical analysis. No phase separation with diameters higher than submicron size was observed in the FE-SEM images of the fractured surfaces of PUN-PG/POs. The 5% weight loss temperature for the PUN-PG/POs decreased and the tensile strength and modulus increased as the ratio of PGL to PO3G increased. The decomposition test of the cured product of PGL and PDI in excess 1-hexanol revealed that the dissociation of phenol–carbamate bonds started at approximately 100 °C. All of the PUN-PG/POs were healable by hot-pressing at 100 °C for 2 h under 1 MPa at least three times. The healing efficiency in terms of tensile strength increased with a decreasing ratio of PGL to PO3G, and the maximal healing efficiency was 85%.</p></div>","PeriodicalId":737,"journal":{"name":"Polymer Bulletin","volume":"82 7","pages":"2329 - 2350"},"PeriodicalIF":3.1,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143818261","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

Engineering smart hydrogels for intelligent drug delivery 用于智能给药的工程智能水凝胶

IF 3.1 3区化学

Polymer Bulletin Pub Date : 2024-12-17 DOI: 10.1007/s00289-024-05618-x

Mitra Baghali, Hakimeh Ziyadi, Antonio Di Martino

{"title":"Engineering smart hydrogels for intelligent drug delivery","authors":"Mitra Baghali, Hakimeh Ziyadi, Antonio Di Martino","doi":"10.1007/s00289-024-05618-x","DOIUrl":"10.1007/s00289-024-05618-x","url":null,"abstract":"<div><p>Hydrogels are a brand new generation of three-dimensional polymeric networks with crosslinking bonds and the potential to hold large amounts of aqueous solvents and biological fluids, which have attracted considerable interest in numerous fields. Smart hydrogels can show reversible volume phase transitions or sol–gel transitions in response to small environmental stimuli. Stimulus-responsive hydrogels are also known as smart or environment-sensitive hydrogels. Generally, stimuli are categorized into three groups: physical (temperature, strain, light, sound, ultrasound, electric and magnetic fields, and mechanical pressure), chemical (pH, solvent composition, chemical species, or ionic energy), and biological (glucose, enzyme, and antigen) situations and stimuli. Based on this kind of responsiveness, smart hydrogels have performed a great role in a wide variety of applications, including remedy, biomedical engineering, and drug delivery systems. The purpose of this study is to investigate the basic concept of smart hydrogels and categorize them based totally on the types of stimulants in drug delivery systems. This review also discusses the structural elements and functional properties of smart hydrogels, their chemical interactions, and the principle variables involved in their structure. Smart hydrogels have great promise as a futuristic drug delivery system, enabling targeted and managed release of healing agents. Their responsiveness to environmental stimuli opens new avenues for particular and personalized treatments, revolutionizing the pharmaceutical sector.</p></div>","PeriodicalId":737,"journal":{"name":"Polymer Bulletin","volume":"82 7","pages":"2287 - 2328"},"PeriodicalIF":3.1,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143818229","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