Iranian Polymer Journal最新文献

{"title":"Carboxymethyl cellulose hydrogel for pH-responsive drug release of curcumin","authors":"D. K. S. Nishadani,&nbsp;Thennakoon M. Sampath Udeni Gunathilake,&nbsp;Yern Chee Ching,&nbsp;Hemanth Noothalapati","doi":"10.1007/s13726-024-01331-8","DOIUrl":"10.1007/s13726-024-01331-8","url":null,"abstract":"<div><p>This study outlines the development of a pH-sensitive hydrogel for hydrophobic drug delivery by cross-linking carboxymethyl cellulose (CMC) with varying fumaric acid (FA) concentrations (9%–26%). FTIR analysis of CMC–FA-26% hydrogel showed a prominent band at 1714 cm⁻¹, indicating the formation of ester bond. Compression tests demonstrated increased strength with cross-linking density changing from 9 to 26%. Stress–strain analysis revealed plastic deformation beyond 80% strain, with compression stress rising from 0.12 ± 0.1 to 1.9 ± 0.1 MPa as FA content increased from 9 to 26%. Thermogravimetric analysis revealed higher weight reduction (25–28%) for CMC–FA-26% compared to CMC–FA-9% (16–18%) during the fumaric acid weight loss stage. Scanning electron microscopic (SEM) examination showed that the hydrogels had a porous structure, crucial for their swelling, drug loading, and release. According to the swelling results, swellability was decreased by increasing cross-linking degree, and increased by increasing pH values. In the biodegradability test, the CMC–FA-26% hydrogel showed 35% weight loss after 28 days, while the CMC–FA-9% hydrogel exhibited a 54% weight loss. To improve the compatibility between hydrophilic CMC and hydrophobic curcumin (CUR)/β-cyclodextrin (β-CD) was incorporated to the hydrogel. The solubility results showed that with varying the molar ratio of CUR:β-CD from 1:1 to 1:3, the mean UV–Vis absorption changed from 0.005 to 1.048. The variation of the medium’s pH from 1.2 to 12 resulted in a notable increase in the cumulative curcumin release, ranging from 5.91 to 46.63%. Drug delivery results indicated excellent drug release in alkaline medium, highlighting the hydrogel’s potential for targeted drug delivery of hydrophobic drugs in the gastrointestinal tract.</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 10","pages":"1449 - 1467"},"PeriodicalIF":2.4,"publicationDate":"2024-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141119652","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}

{"title":"An experimental analysis on thermal performance of interloping threaded cooling channels in injection mold cavity","authors":"Prashant Paraye,&nbsp;R. M. Sarviya","doi":"10.1007/s13726-024-01329-2","DOIUrl":"10.1007/s13726-024-01329-2","url":null,"abstract":"<div><p>Injection molding is a mass manufacturing process, which facilitates the production of specially designed products in diverse shapes and sizes using various materials, serving industries from daily necessities to aerospace components. The cooling process in injection molding takes up a significant portion of an overall cycle time. In this study, a thermal analysis of conventional and threaded cooling channels in injection mold cavity was conducted using infrared thermal imaging. The experiments measured the temperature distributions in the mold cavity as they reached steady states during both heating and cooling phases. The temperature–time dynamics within the injection mold cavity revealed that the threaded design was significantly more efficient, heating up 23.4 s faster and cooling down 33.3 s quicker than the conventional cooling channel. Additionally, the threaded cooling channel maintained a more uniform temperature distribution of 1.64 °C lower than that in conventional cooling. The threaded configuration achieved peak temperatures 5.88% more rapidly and returned faster to near-ambient levels by 5.55%, highlighting its enhanced efficiency. Findings showed a higher quality of mold products and a reduction in cooling time, with the threaded cooling channel producing parts characterized by a high-gloss and refined surface finish. This enhanced performance of the threaded cooling channel could lead to significant energy savings and productivity gains in industrial applications.</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 11","pages":"1539 - 1552"},"PeriodicalIF":2.4,"publicationDate":"2024-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141123096","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}

{"title":"Strong and tough conductive silk fibroin/poly(vinyl alcohol) composite hydrogel by a salting-in and salting-out synergistic effect","authors":"Honghui Ma,&nbsp;Yingxue Deng,&nbsp;Yubo Lin,&nbsp;Yu Zhang,&nbsp;Zhengxiong Zhou,&nbsp;Haoan Yu,&nbsp;Xiancai Jiang","doi":"10.1007/s13726-024-01334-5","DOIUrl":"10.1007/s13726-024-01334-5","url":null,"abstract":"<div><p>Hofmeister effect has been used to prepare highly tough and conductive hydrogel. However, it usually needs the complex steps of post-treatment of a pre-formed weak hydrogel by soaking in salt solution. Herein, strong and tough silk fibroin/poly(vinyl alcohol) (SF/PVA) ionic conductive hydrogel was prepared by a simple one-pot method by direct introduction of sodium citrate (Na₃Cit) into SF/PVA solution. It was found that Na₃Cit could not be directly introduced into SF/PVA solution due to its salting-out effect to prepare tough hydrogel. Fortunately, the salting-out effect of Na₃Cit could be weakened with the presence of calcium chloride (CaCl₂) and glycerol in SF/PVA solution. Finally, the strong and tough SF/PVA hydrogel was obtained by the one-time freezing/thawing process of SF/PVA/CaCl₂/Na₃Cit/glycerol solution. The tough SF/PVA/CaCl₂/Na₃Cit/glycerol organohydrogel with the tensile strength of 0.33 MPa and elongation-at-break of 540% were obtained. The SF/PVA/CaCl₂/Na₃Cit/glycerol organohydrogel with the excellent mechanical properties and ionic conductivity was used as the strain sensor. The SF/PVA/CaCl₂/Na₃Cit/glycerol organohydrogel sensor could detect various human motions with high sensitivity (GF = 6.87). The SF/PVA/CaCl₂/Na₃Cit/glycerol organo hydrogel strain sensor could generate reliable and reproducible electrical signals in response to various mechanical stimuli. We intend to present a simple and effective method to prepare high performance ionic hydrogel by Hofmeister effect.</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 11","pages":"1527 - 1537"},"PeriodicalIF":2.4,"publicationDate":"2024-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141060375","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}

{"title":"Flexible production of three-dimensional biocomposite from cotton micro-dust waste and sand blend through a novel combination of molten salt hydrate and sodium L-glutamate salt","authors":"Vignesh Natarajan,&nbsp;Dali Naidu Arnepalli,&nbsp;Chandraraj Krishnan","doi":"10.1007/s13726-024-01322-9","DOIUrl":"10.1007/s13726-024-01322-9","url":null,"abstract":"<div><p>Cotton micro-dust (CMD) is a low-cost feedstock produced by cotton spinning mills. It consists of cellulose as the chief component, along with other non-cellulosic lignin and extractives. The two-stage pretreatment of CMD using alkali and acid facilitated cellulose enrichment and promoted favorable morphology for producing cellulose-based biomaterials. The process involves the solubilization of cellulose using an inexpensive and environmentally friendly zinc chloride solution for further conversion to biomaterials. The addition of novel cross-linker monosodium glutamate (MSG) at 5% (by weight) concentration facilitated the preparation of the polymer matrix at room temperature. The gelation process that transformed the liquid mixture into a solid polymer matrix depended on the shear-sensitive interaction between the Zn–CMD solution and the MSG. Further, the mix of CMD–ZnCl₂ and MSG was converted into a biocomposite by a reinforcement step with pit sand. The Zn–CMD–MSG acted as a binder for sand particles and formed a solid biocomposite. The complex association of sand with CMD conferred high thermal stability to the biocomposite. Moreover, the biocomposite showed good mechanical properties, with a tensile strength of 20 MPa and a flexural strength of 12 MPa. Hence, the present process is promising for developing a cellulose-based green composite from low-cost cotton waste and sand.</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 9","pages":"1215 - 1229"},"PeriodicalIF":2.4,"publicationDate":"2024-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141060369","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}

{"title":"Effect of various geopolymerization parameters on poor quality Afşin-Elbistan fly ash-based geopolymer concretes with ground granulated blast furnace slag","authors":"Ahmet Hayrullah Sevinç,&nbsp;Muhammed Yasin Durgun","doi":"10.1007/s13726-024-01330-9","DOIUrl":"10.1007/s13726-024-01330-9","url":null,"abstract":"<div><p>The utilization of Afşin-Elbistan fly ash (FA), which cannot be used in cement and concrete industry in production of geopolymers, has been studied with some preliminary trials. In this study, FA of Afşin-Elbistan thermal power plant, which does not fit any of FA classes according to ASTM C 618, was used as a geopolymer binder raw material. The main motivation of the study is to investigate the partial usability of this type of FA, which is not sufficient on its own and creates a large amount of waste, as a geopolymer raw material. FA was replaced with ground granulated blast furnace slag (GGBFS) by the ratios of 25% and 50% (by weights) in order to develop the properties of geopolymer concrete. Sodium silicate (SS) and sodium hydroxide (SH) (10 and 14 M) were used as activators. Three different activator to binder ratios (0.45, 0.55 and 0.65) and three SS/SH ratios (0.75, 1.0 and 1.5) were chosen. Unit weight, compressive strength, splitting tensile strength, and ultrasonic pulse velocity tests were performed for 28 and 60 days. In order to investigate the microstructure, scanning electron microscopy (SEM) analyses were performed. As a result, GGBFS incorporation enhanced the properties of Afşin-Elbistan FA-based geopolymer concrete. With the increase of GGBFS content, the compressive strength values increased. The highest strengths were obtained from 50% GGBFS groups. The results revealed that Afşin-Elbistan FA (AEFA), which has the highest waste reserve among the thermal power plant fly ashes in Turkey, could be evaluated as partial geopolymer raw material.</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 10","pages":"1435 - 1448"},"PeriodicalIF":2.4,"publicationDate":"2024-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s13726-024-01330-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140962601","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}

{"title":"Efficient adsorption of heavy metal ions chromium (III) by modified corn starch/GO composite aerogel","authors":"Dequan Wei,&nbsp;Shenghua Lv,&nbsp;Shanshan Zhang,&nbsp;Jingjing Zuo,&nbsp;Shan Liang,&nbsp;Juhui Yang,&nbsp;Jialin Wang","doi":"10.1007/s13726-024-01326-5","DOIUrl":"10.1007/s13726-024-01326-5","url":null,"abstract":"<div><p>Starch is a natural polymer containing a large number of active hydroxyl groups, which make it an ideal material for preparation of adsorption functional aerogels. In this work, a modified carboxymethyl corn starch/organic glass composite aerogel (CMSHA-GO) was successfully prepared using starch as raw material and hexamethylenediamine as cross-linking agent. It showed significant adsorption properties for heavy metal ions. When the composite aerogel was introduced with 10 mg GO, the adsorption capacity of CMSHA-GO₁₀ aerogel for heavy metal ions was in the order of Cr³⁺ &gt; Ni²⁺ &gt; Cu²⁺ &gt; Cr(VI) &gt; Pb²⁺, while its adsorption performance for heavy metal ion Cr³⁺ was mainly discussed. The structures and morphologies of the composite aerogels were characterized by FTIR, XRD, and SEM techniques. The results showed that the CMSHA-GO composite aerogel has a stable three-dimensional mesh-like porous structure with good conditions for metal ion adsorption. In addition, the effects of different GO contents, pH values, and time conditions on the adsorption of metal ions by the CMSHA-GO composite aerogel were discussed. When the weight ratio of carboxymethyl starch: hexanediamine: GO was 10:0.1:0.1, the CMSHA-GO₁₀ composite aerogel showed the best adsorption performance for Cr³⁺ ions. The adsorption equilibrium was reached within 3 h at an initial Cr³⁺ concentration of 500 mg·L⁻¹, with a maximum equilibrium adsorption capacity (<i>q</i>_e^cale) of 212.7 mg/g.</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 10","pages":"1469 - 1480"},"PeriodicalIF":2.4,"publicationDate":"2024-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140963246","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}

{"title":"Flame retardant polyvinyl alcohol composite with excellent comprehensive properties prepared using Cu2O/chitosan and phosphorus-based flame retardants","authors":"Wenzong Xu,&nbsp;Yi Zhang,&nbsp;Julan Liu,&nbsp;Ziyi Xuan,&nbsp;Lulu Su,&nbsp;Maotong Zhao","doi":"10.1007/s13726-024-01327-4","DOIUrl":"10.1007/s13726-024-01327-4","url":null,"abstract":"<div><p>Polyvinyl alcohol (PVA) has good film-forming and barrier properties and can be used as packaging and biomedical materials, etc. However, PVA burns easily and is prone to melt dropping, limiting its wider application. In this study, Cu₂O/Cs was prepared by coating chitosan (Cs) on the surface of cuprous oxide (Cu₂O), and mixed with ammonium polyphosphate (APP) and phytic acid (PA) to prepare PVA composites. The results showed that the limiting oxygen index (LOI) value of the PVA composite with 8% (by weight) APP and 2% (by weight) Cu₂O/Cs as flame retardants was 30.6%, which was 50.7% higher than that of pure PVA. Compared with pure PVA, its composite peak heat release rate (pHRR) was significantly reduced by 81.1%, and its total heat release rate (THR) was also markedly reduced by 67.7%, while its time to ignition (TTI) was increased by 41 s. The main reasons were that the gas generated by APP decomposition during heating reduced the concentration of combustible gas, the generated phosphorus-containing substances promoted the dehydration and carbonization of PVA, and Cu₂O and chitosan (Cs) improved the compactness of the carbon layer. In particular, the incorporation of Cu₂O/Cs improved the mechanical properties of our PVA composites compared with those containing only APP and PA. In short, the combination of Cu₂O/Cs and phosphorus-based flame retardants improved the flame retardant performance of PVA at low additions while taking into account the mechanical properties. This is expected to expand the range of applications of PVA.</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 10","pages":"1381 - 1394"},"PeriodicalIF":2.4,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140972422","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}

{"title":"Sustainable hybrid nanoparticle reinforced low-density polyethylene: emerging materials for engineering applications","authors":"Sefiu Adekunle Bello,&nbsp;Mohammed Kayode Adebayo,&nbsp;Raphael Gboyega Adeyemo,&nbsp;Patricia Abimbola Popoola","doi":"10.1007/s13726-024-01307-8","DOIUrl":"10.1007/s13726-024-01307-8","url":null,"abstract":"<div><p>Nanoparticles are materials that have diameter/dimension between 1 and 100 nm. The term also covers materials as high as 500 nm in diameter or length. Their emergence has given birth to a new set of nanocomposites with more promising properties than the conventional composites. Moreover, polyethylene products generate wastes. Their managements can create wealth and reduce dependence on the virgin polyethylene for green material productions. In this study, <i>Delonix regia</i> pod and eggshell hybrid nanoparticles, up to 12% (by wt), were incorporated into the low-density polyethylene. Properties of the developed hybrid nanocomposites were investigated and compared with those of the existing automobile dashboard cover material properties in literature. Results obtained from mechanical examinations show 332.77, 179.19, 807.32, 63.61, 4.33, 26.61 and 21.35% increases in tensile strength, percentage elongation, tensile modulus, flexural strength, flexural deflection, flexural energy absorbed and hardness, respectively; with consequent reductions in the flexural modulus and impact energy by respective 4.67 and 4.40% at 4% <i>Delonix regia</i> pod, 6% eggshell particles addition to the virgin low density polyethylene. Maximum impact energy of 25.09 J equal to 16.48% increase was noticed at 4% <i>Delonix regia</i> pod 4% eggshell particle addition to the recycled low-density polyethylene. Virgin low-density polyethylene containing 4% <i>Delonix regia</i> pod, 6% eggshell particles having greater tensile strength and impact energy than each of the existing materials for the automobile dashboard cover is confirmed suitable for both upper and lower layers of the dashboard cover. Hence, 4% <i>Delonix regia</i> pod 6% eggshell particles reinforced virgin low-density polyethylene has 28.39 ± 1.42 Nmm⁻² tensile strength; 1137.42 ± 15 Nmm⁻² tensile modulus; 6.24 ± 0.68% tensile elongation; 21.86 ± 0.9 J impact energy; 69.17 ± 3.51 VHN hardness value; 28.11 ± 0.84 Nmm⁻² flexural strength; 7.42 ± 0.8 flexural deformation; 314.41 ± 20.53 Nmm⁻² flexural modulus and 0.30 J flexural energy.</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 7","pages":"965 - 980"},"PeriodicalIF":2.4,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140973631","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}

{"title":"Relaxation spectrum of poly(styrene-b-isoprene-b-styrene) triblock copolymer","authors":"Hengyu Luo,&nbsp;Zihao Shang,&nbsp;Hui Han,&nbsp;Haiqing Hu","doi":"10.1007/s13726-024-01328-3","DOIUrl":"10.1007/s13726-024-01328-3","url":null,"abstract":"<div><p>A relatively complete continuous relaxation spectrum <i>H</i>(<i>τ</i>) of poly(styrene-<i>b</i>-isoprene-<i>b</i>-styrene) (SIS) two-phase system was divided into five regions based on the variation of <i>H</i>(<i>τ</i>) strength, which corresponded to: (1) glass transition of PI phase, (2) high elastic state of PI phase, (3) glass transition of PS phase, (4) high elastic state of PS phase, and (5) viscous flow state of the entire SIS molecular chain. Five regions only appeared in SIS1105, because the molecular of SIS1105 experienced glass transition of PI block, PS block, and viscous flow of the whole molecular chain. The stress relaxation of SIS was influenced by the S/I ratios, because the PS microdomains ultimately determined the relaxation characteristics. The stress relaxation of SIS system was also closely related to the viscous flow transition temperature (<i>T</i>_f). When the S/I ratio was low (15/85), forced stress relaxation occurred; when the S/I ratio was high (29/71 and 45/55), the SIS system did not show stress relaxation below the <i>T</i>_f. When the temperature was higher than the <i>T</i>_f, the S/I ratio did not affect the stress relaxation. The relaxation information obtained from the Cole–Cole diagram further verified the analysis of the continuous relaxation spectrum<i> H</i>(<i>τ</i>) and stress relaxation.</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 10","pages":"1411 - 1422"},"PeriodicalIF":2.4,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140935160","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}

{"title":"CdSe/polyvinyl alcohol nanocomposite films for packaging: thermal, mechanical, optical and physico-chemical properties","authors":"Sandeep Singh,&nbsp;Sangeeta Garg,&nbsp;Amit D. Saran","doi":"10.1007/s13726-024-01320-x","DOIUrl":"10.1007/s13726-024-01320-x","url":null,"abstract":"<div><p>CdSe nanostructures, well-investigated for their optical properties, have been evaluated here as functional fillers in polyvinyl alcohol (PVA) films, for packaging applications. Polymer-nanocomposite films of PVA and CdSe nanoparticles (nanospheres and nanorods), were evaluated for their thermal, mechanical<b>,</b> optical and physico-chemical properties. Microemulsion-synthesized CdSe were loaded in PVA films by solution casting method. CdSe-PVA films were prepared at varying morphology (spherical to rod-like) of CdSe, by controlling the reaction time (0, 2, 4, 6 and 8 h) at 1% (by weight) loading. The effect of loading of CdSe was also studied at 0.1, 0.5, 1, 5, and 10% (by weight) for the reaction time of 4 h. CdSe nanoparticles were characterized by high-resolution transmission electron microscopy (HR-TEM) and X-ray diffractometry (XRD). The melting point and heat of fusion of CdSe-PVA films (for the reaction time of 4 h) exhibited the maximum values of 216.9 ± 0.73 °C and 6.78 ± 0.24 J/g, respectively, at 1% (by weight) of CdSe, as compared with 209.8 ± 0.52 °C and 3.76 ± 0.1 J/g for plain PVA film. The CdSe-PVA films with spherical CdSe showed the maximum enhancement of 118 and 87.4% for Young’s modulus (MPa) and modulus of toughness (MPa), respectively as compared with PVA films. With increasing load of CdSe, the CdSe-PVA films showed an increase in the two moduli with maximum enhancement of 124 and 57 at 10% (by weight) of CdSe, as compared with PVA films. The optical, colorimetric, chemical resistance, UV-hindrance, water content and antibacterial properties of CdSe-PVA films were also investigated.</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 9","pages":"1257 - 1275"},"PeriodicalIF":2.4,"publicationDate":"2024-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140935008","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}