Journal of Polymer Engineering最新文献_第10页

Frontmatter 头版头条

4区工程技术

Journal of Polymer Engineering Pub Date : 2023-08-01 DOI: 10.1515/polyeng-2023-frontmatter7

引用次数: 0

Antimicrobially effective protein-loaded metal chelated chitosan composite 高效抗菌蛋白质负载金属螯合壳聚糖复合材料

IF 2 4区工程技术

Journal of Polymer Engineering Pub Date : 2023-08-01 DOI: 10.1515/polyeng-2023-0060

Birnur Akkaya, R. Akkaya, Ayşe Hümeyra Taşkın Kafa

{"title":"Antimicrobially effective protein-loaded metal chelated chitosan composite","authors":"Birnur Akkaya, R. Akkaya, Ayşe Hümeyra Taşkın Kafa","doi":"10.1515/polyeng-2023-0060","DOIUrl":"https://doi.org/10.1515/polyeng-2023-0060","url":null,"abstract":"Abstract The immobilization of lysozyme onto a novel synthetic metal chelator composite based on chitosan/PAA-PMA (chitosan/acrylamide-maleic acid) and its effect on antimicrobial activity were the aim of the current study. The plain composite and the lysozyme immobilized composite were characterized according to scanning electron microscopy (SEM), Ultraviolet spectroscopy (UV), Fourier transform infrared (FT-IR), and X-ray diffraction (XRD) analysis. Furthermore, the activities of lysozyme and immobilized lysozyme were investigated, as well as their antimicrobial activity against Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, Enterococcus faecalis, and Staphylococcus aureus, as well as their cytotoxic effects, which were both approximately greater than those of free lysozyme. The last step was cytotoxic studies on lysozyme, chitosan composite, and lysozyme-immobilized chitosan composite, which showed no cytotoxic effect. Several investigations have shown that metal chelators improve lysozyme’s antibacterial action. Two carboxylic acids containing maleic acid were used as a metal chelator in this study. Lysozyme was immobilized from a side other than carboxylic acids, so that carboxylic acid groups, which are metal chelating groups, do not prevent synergy by competing with metal binding at neutral pH. This enhanced antimicrobial activity.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46625053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Highly thermally conductive polyamide 6 composites with favorable mechanical properties, processability and low water absorption using a hybrid filling of short carbon fiber, flake graphite and expanded graphite 以短碳纤维、鳞片石墨和膨胀石墨为填料制备高导热聚酰胺6复合材料，具有良好的机械性能、加工性能和低吸水率

IF 2 4区工程技术

Journal of Polymer Engineering Pub Date : 2023-07-31 DOI: 10.1515/polyeng-2023-0117

Bao-Gang Fu, Long-Xi Yang, Wenwen Xiang, Xiaoxuan Zou, Wenli Dai

{"title":"Highly thermally conductive polyamide 6 composites with favorable mechanical properties, processability and low water absorption using a hybrid filling of short carbon fiber, flake graphite and expanded graphite","authors":"Bao-Gang Fu, Long-Xi Yang, Wenwen Xiang, Xiaoxuan Zou, Wenli Dai","doi":"10.1515/polyeng-2023-0117","DOIUrl":"https://doi.org/10.1515/polyeng-2023-0117","url":null,"abstract":"Abstract It is a challenge to maintain the mechanical properties and processability of thermally conductive polymer composites in the presence of high filling of heat conductive filler. An optimized hybrid filler system composed of flake graphite (FG), expanded graphite (EG) and short carbon fiber (CF) was introduced into PA6 matrix. The addition of EG to PA6 was found to be more effective in improving its thermal conductivity, while the addition of FG maintained favorable processability due to its lubrication effect. Furthermore, the hybrid filling of FG and EG has a synergistic effect on the enhancement of thermal conductivity. The ternary filling of FG, EG and CF produced highly heat conductive PA6 composites with high strength, favorable processability, and low water absorption. The thermal conductivity of 10CF/20FG/10EG/PA6 composite reached 3.45 W/m k, which is 12.3 times of pure PA6. Additionally, the flexural strength increased to 110 MPa, which is 37 % higher than that of pure PA6, and the water absorption was reduced to one quarter that of pure PA6.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42974312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

CdSe nanodots to nanorods in PVA films: effect of shape transition and loading on the opto-mechanical and biodegradation properties PVA薄膜中CdSe纳米点到纳米棒的形状转变和负载对光机械和生物降解性能的影响

IF 2 4区工程技术

Journal of Polymer Engineering Pub Date : 2023-07-25 DOI: 10.1515/polyeng-2023-0031

S. Singh, Sangeeta Garg, Amit D. Saran

{"title":"CdSe nanodots to nanorods in PVA films: effect of shape transition and loading on the opto-mechanical and biodegradation properties","authors":"S. Singh, Sangeeta Garg, Amit D. Saran","doi":"10.1515/polyeng-2023-0031","DOIUrl":"https://doi.org/10.1515/polyeng-2023-0031","url":null,"abstract":"Abstract Polyvinyl alcohol (PVA) films impregnated with CdSe nanoparticles were evaluated for the effect of morphology (from spherical to rod-shaped) and concentration of CdSe, on the optical and mechanical properties. CdSe nanodots and nanorods were synthesized by a modified microemulsion method with hydrazine hydrate as the shape modulator. CdSe nanoparticles and PVA/CdSe films were characterized by high resolution transmission electron microscopy (HR-TEM), field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), UV–Vis spectroscopy and universal testing machine (UTM) analysis. The tensile strength and % elongation (at break) of PVA/CdSe films, increased from 32.8 MPa and 178 % (for CdSe nanorods) to 40.3 MPa and 259 % (for CdSe nanodots), respectively. The effect of loading of CdSe in PVA films, were evaluated at 0.1, 0.5, 1.0, 5.0 and 10 wt%. The tensile strength increased from 18.9 MPa (plain PVA) to 35.08 MPa (1 % CdSe) and increased upto 40 MPa for 10 % CdSe. The absorbance of PVA/CdSe films increased, while the reflectance and the transmittance decreased, with increasing wt% of CdSe in PVA films. The colour, density and water-vapour permeability of PVA/CdSe films, were also estimated. The biodegradability of PVA/CdSe films in soil was found to increase by 55 % as compared with PVA films.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2023-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41995400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Exploration of dielectric spectra of variously synthesized epoxy/ZnO nanocomposites 不同合成环氧/ZnO纳米复合材料的介电光谱研究

IF 2 4区工程技术

Journal of Polymer Engineering Pub Date : 2023-07-21 DOI: 10.1515/polyeng-2023-0079

Mihir N. Velani, Ritesh Patel

引用次数: 0

Preparation and performance of “three-layer sandwich” composite loose nanofiltration membrane based on mussel bionic technology 基于贻贝仿生技术的“三层夹心”复合疏松纳滤膜的制备与性能

IF 2 4区工程技术

Journal of Polymer Engineering Pub Date : 2023-07-10 DOI: 10.1515/polyeng-2023-0109

Shaowei Chen, P. Liu, Zhenchun Li, Tianwei Li, Yunwu Yu, Yuanyuan Bi, Feihong Li, Jun Mao

{"title":"Preparation and performance of “three-layer sandwich” composite loose nanofiltration membrane based on mussel bionic technology","authors":"Shaowei Chen, P. Liu, Zhenchun Li, Tianwei Li, Yunwu Yu, Yuanyuan Bi, Feihong Li, Jun Mao","doi":"10.1515/polyeng-2023-0109","DOIUrl":"https://doi.org/10.1515/polyeng-2023-0109","url":null,"abstract":"Abstract In this study, a novel “three-layer sandwich” composite loose nanofiltration (NF) membrane structure by mussel bionic technology was constructed on a porous polyvinylidene fluoride (PVDF) substrate membrane, with a mussel bionic coating as the middle layer and the complex network of polyphenols and metal ions as the top layer. The new composite NF membrane had comprehensive properties such as excellent separation performance, good hydrophilicity and strong antifouling ability. The experimental results showed that the combination of tannic acid (TA) and iron ion (Fe3+) could significantly improve the comprehensive performance of the composite NF membrane, with water flux of more than 3000 L/(m2∙h), and the retention rate of dyes and bovine serum protein (BSA) exceeded 90 %, and contact angle was up to 30°. The combination of TA and copper ion (Cu2+) can greatly enhance the antifouling performance and interception ability of methylene blue. The complexation activity of metal ions and polyphenols was related to the oxidation of metal ions. The PVDF/DA-PEI/TA-M+ composite structure scheme of “three-layer sandwich” NF membrane provides a new idea and future development direction for the development of novel NF membranes with excellent comprehensive performance.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2023-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45832828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synergistic effect of GMA and TMPTA as co-agent to adjust the branching structure of PLLA during UV-induced reactive extrusion GMA和TMPTA作为助剂对紫外光诱导反应挤出PLLA支化结构的协同调节作用

IF 2 4区工程技术

Journal of Polymer Engineering Pub Date : 2023-07-04 DOI: 10.1515/polyeng-2023-0106

Xi Chen, Wei‐Tao Huang, Bing Yuan, Guang-jian He, Xiaochen Yin, X. Cao

{"title":"Synergistic effect of GMA and TMPTA as co-agent to adjust the branching structure of PLLA during UV-induced reactive extrusion","authors":"Xi Chen, Wei‐Tao Huang, Bing Yuan, Guang-jian He, Xiaochen Yin, X. Cao","doi":"10.1515/polyeng-2023-0106","DOIUrl":"https://doi.org/10.1515/polyeng-2023-0106","url":null,"abstract":"Abstract In this work, glycidyl methacrylate (GMA) and trimethylol propanetriacrylate (TMPTA) are employed to adjust the branching structure of poly L-lactide acid (PLLA) during reactive extrusion induced by UV irradiation. The reaction of GMA epoxide with terminal carboxyl or hydroxyl groups at PLLA chain end can introduce C=C groups onto PLLA molecular chains. Chain branching reaction occurred via the free-radical grafting reaction of the vinyl group in TMPTA with both PLLA backbone and the C=C group terminated PLLA induced by UV irradiation. As a result, varied branching levels can be obtained by changing the ratio of GMA and TMPTA. The characterizations of rheological properties and size exclusive chromatograph correlated to the chain branches were performed to evaluate the chain branching extent. The increases in shear viscosity and storage modulus at terminal zone, and the reduced branching degree were observed in the branched PLLA samples. The results from 1H-NMR and FIRT indicate that the grafting reaction of GMA onto PLLA take place successfully. Thus, this study proposes a strategy to adjust LCB-PLA structure using GMA and TMPTA as co-agents, which is of great importance for the industrialization of PLA products.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2023-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46472209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Frontmatter 头版头条

4区工程技术

Journal of Polymer Engineering Pub Date : 2023-07-01 DOI: 10.1515/polyeng-2023-frontmatter6

引用次数: 0

Fabrication and characterization of microencapsulated dimethyl adipate phase change material with melamine-formaldehyde shell for cold thermal energy storage in coating 涂层用三聚氰胺-甲醛壳微囊化己二酸二甲酯相变材料的制备与表征

IF 2 4区工程技术

Journal of Polymer Engineering Pub Date : 2023-06-29 DOI: 10.1515/polyeng-2023-0053

Bhagyashree Vasantrao Waghmare, P. Mahanwar

{"title":"Fabrication and characterization of microencapsulated dimethyl adipate phase change material with melamine-formaldehyde shell for cold thermal energy storage in coating","authors":"Bhagyashree Vasantrao Waghmare, P. Mahanwar","doi":"10.1515/polyeng-2023-0053","DOIUrl":"https://doi.org/10.1515/polyeng-2023-0053","url":null,"abstract":"Abstract Microencapsulated phase change material (MPCM) was synthesized by using the in-situ polymerization technique. Dimethyl adipate (DMA) and melamine-formaldehyde were used as core and shell material for polymerization respectively. Sodium laureate sulphate (SLS) is used as a surfactant. The thermal properties were characterized by using a differential scanning calorimeter (DSC) and thermogravimetry analysis (TGA). Fourier transform infrared spectroscopy (FT-IR) was used to confirm the chemical structure. The morphology of microcapsules was studied by using, scanning electron microscopy. DSC result of MPCM has been observed to melt at 10.09 °C with melting latent enthalpy 88 J/g and crystallizes at 4.69 °C with crystallization latent heat 89.50 J/g. TGA analysis confirms increases in the thermal stability of MPCM. The decorative coating was prepared with 0, 5, 10, 15, and 20 % MPCM loading, and the prepared paint was tested for pencil hardness, gloss, and stain resistances. The thermal energy transfer rate was used to measure how much time coated panel took to reach the equilibrium temperature of 25 °C. Coating with 20 % MPCM loading revealed good thermal storage capacity but other general coating properties deteriorate.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2023-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41681865","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrospinning and electrospun based polyvinyl alcohol nanofibers utilized as filters and sensors in the real world 静电纺丝和基于静电纺丝的聚乙烯醇纳米纤维在现实世界中用作过滤器和传感器

IF 2 4区工程技术

Journal of Polymer Engineering Pub Date : 2023-06-27 DOI: 10.1515/polyeng-2023-0044

Kamran Khan, Suhaib Masroor, G. Rizvi

引用次数: 0