JOURNAL OF POLYMERS AND THE ENVIRONMENT
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2021
·Vol. 30
·期 5
·2099-2108
·
IF 3.667
Ma Yufeng,Song Fei,Yu Juan,Wang Nannan,Jia Puyou,Zhou Yonghong
The recent studies on sustainable plasticizer mainly focus on raw material source, synthesis method and plasticization, but the effect of chemical functional groups (epoxy group and ester group) of sustainable plasticizer on compatibility and thermal stability of plasticized polyvinyl chlorid (PVC) materials has been ignored. In this study, two kinds of sustainable plasticizers (eleostearic acid eugenol ester (EAEE) and epoxidized EAEE) were synthesized to plasticize PVC films using eleostearic acid and eugenol. Compared to EAEE, PVC plasticized with epoxidized EAEE showed more flexible and thermal stability. Due to forming more hydrogen bonds between PVC chains and epoxidized EAEE than that of PVC chains, the efficient plasticizing on PVC with epoxidized EAEE was more than EAEE. Because of the flexible alkane chains and polar group (ester groups and epoxy groups) in the structure of epoxidized EAEE, the intermolecular interaction force with PVC was stronger than EAEE, and there was homogeneous and smooth surface of plasticized PVC films. Graphical Abstract
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2018
·
IF 3.927
Chuang-Chao Sun,Ming-Yong Zhou,Na-Chuan Wang,Xue Yin,Jia-Jia Yuan,You-Zhi Song,Li-Ping Zhu,Bao-Ku Zhu
Membranes with tunable charge characteristics and suitable nanopores are highly desired for their enormous potentials in specific membrane separation process. Herein, we present an effective approach to achieve this by using PVC-based grafting amphiphilic charged polymers (GACPs) as membrane additives. Non-solvent induced phase separation (NIPS) combined with a non-solvent annealing (NA) method is carried out to fabricate membranes with suitable nanopores. Employing scanning electron microscopy image analysis and PEG rejection tests on the prepared membranes, we observe pronounced shrinkage of pore size from around 10 to 3 nm caused by the NA process. In addition, the results of the zeta potentials and pore size distribution suggest the successful fabrication of membranes with tunable charge characteristics and large nanopores. Furthermore, the significant increase of Na 2 SO 4 rejection from 20% to 80% demonstrates the effectiveness of this approach, which may have giant application potentials in loose nanofiltration (NF).
研究领域:
材料科学
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膜分离技术
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环境工程
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产品关联
DOI
高影响因子
ENERGY
·
2021
·
IF 7.147
Chao Wang,Zhiqiang Jiang,Qingbin Song,Mingzheng Liao,Jiahong Weng,Rui Gao,Ming Zhao,Ying Chen,Guanyi Chen
Urgent need for waste disposal and renewable energy have opened up promising pathways for renewable and sustainable fuel production to substitute traditional fossil fuels. In this study, catalytic co-pyrolysis of waste paper (WP) and polyvinyl chloride (PVC) as typical municipal solid wastes was experimentally investigated towards hydrogen-rich syngas production . Results indicated the maximum H 2 yield (429 μmol·g cat −1 ·min −1 ) was obtained with 60% PVC weight ratio under 900 °C which was higher than single component pyrolysis . Higher hydrogen yield (681.76 μmol·g cat −1 ·min −1 ) appeared over Fe/CeO 2 –CaO under the optimal conditions compared to that of Ru/ZSM-5-CaO (445.54 μmol·g cat −1 ·min −1 ). From the calculated non-isothermal kinetic parameters , both catalysts could reduce activation energies. Proper porous structure and CaO content in the catalyst could enhance hydrogen production via carbon species fixation.
研究领域:
能源科学
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环境工程
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2026
·
IF 3.1
Wu Yang,YunLong Ge,Shen Wang,CuiChuan Zhang,Zhi Li,PengFei Cheng,YuXin Zuo,ZhiQi Liu
To address environmental concerns of conventional flame retardants, MgAl-layered double hydroxide (LDH) was synthesized from hydro-magnesite. Utilizing hydrotalcite's structural memory effect, Cu was incorporated into LDH through acid activation and reconstruction. The obtained LDH was combined with ammonium polyphosphate (APP) into polyvinyl chloride (PVC). Composite thermal stability and flame retardancy were systematically evaluated. Results demonstrated that MgAlCu-LDH/APP/PVC exhibited optimal performance, with limiting oxygen index (LOI) increasing from 26.1% (pure PVC) to 31.4%, achieving UL-94 V-0 rating. Cone calorimetry tests showed 19.7% and 20.9% reductions in peak heat release rate (PHRR) and total heat release (THR), respectively. Peak smoke production rate (PSPR) and total smoke production (TSP) decreased by 27.8% and 48.9%. These enhancements originated from synergistic dilution of flammable gases by NH 3 (from APP decomposition) and CO 2 (from LDH). Additionally, APP's acidic sites and Cu's catalytic effect jointly promoted PVC dehydrochlorination and aromatization, forming a dense char layer that effectively suppressed heat and mass transfer. This acid activation–in situ replacement method provides a novel strategy for synthesizing MgAlCu-LDH and other ternary LDHs, demonstrating promising potential for improving polymer fire safety.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2015
·
IF 5.056
Yue Cui,Zhi-Kan Yao,Ke Zheng,Shi-Yuan Du,Bao-Ku Zhu,Li-Ping Zhu,Chun-Hui Du
To explore low-pressure-driven nanofiltration (LPDNF) membranes with high permeate flux , a novel preparation route was proposed and investigated. First, an amphiphilic copolymer of poly (methyl methacrylate- co -dimethylaminoethyl methacrylate) (P(MMA- co -DMA)) was synthesized via free-radical copolymerization , and then blended with polyvinyl chloride (PVC) to fabricate precursor membranes via non-solvent induced phase separation (NIPS) process. Utilizing the quaternization and cross-linking reaction between p -xylylene dichloride (XDC) and tertiary amine units in PVC/PMMA- co -DMA precursor membranes, positively charged PVC/PMMA- co -DMA LPDNF membranes were obtained. Element alanalysis, X-ray photoelectron spectroscopy and scanning electron microscopy were employed to characterize the composition and morphology of the membranes. Effects of PMMA- co -DMA content and XDC concentration on the LPDNF membranes’ performance were studied and discussed. With the optimized condition, the NF membrane showed the highest salt rejection ( R ) and water flux ( J ), e.g., R MgCl 2 =89.1%, J MgCl 2 =22.1 L/(m 2 h) and R NaCl =45.1%, J NaCl =27.6 L/(m 2 h) at a pressure of 0.3 MPa. Besides, the rejections of the LPDNF membranes for inorganic salts increased in an order of Na 2 SO 4
研究领域:
材料科学
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膜技术
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环境工程
·
高分子化学
·
水处理
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DOI
高影响因子
Surfaces and Interfaces
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2022
·
IF 6.137
Yefeng Feng,Li Liu,Hongrong Qiu,Maolin Bo,Wanshan Duan,Qihuang Deng
Utilizing percolation of symmetric MXene filler easily achieves high dielectric constant in polymer/MXene composites. However, percolation leads to low breakdown strength . In present work, we have adopted a new strategy of employing asymmetric bimetallic VTiC MXene filler to fabricate composite dielectrics with highly insulating polyvinyl chloride (PVC) matrix. VTiC filler was prepared via heat-pressing and etching. PVC/VTiC composite films with varied filler contents were prepared via solution cast. Different surface work functions of VTiC were confirmed via density functional theory (DFT) calculations. Compared with several polymer/symmetric monometallic MXene composites in our prior works, PVC/VTiC composites show simultaneously improved dielectric and breakdown properties. In later, high dielectric constant stems from cooperation of filler's asymmetry and polymer/filler interface polarization, and high breakdown strength is rooted in matrix's ultrahigh insulation. Optimized PVC/VTiC composite with 10 wt% filler possesses a high dielectric constant of ∼203, low dielectric loss of ∼0.13 at 100 Hz and high breakdown strength of ∼374 MV m −1 at direct-current field. Innovation of this work is use of asymmetric MXene filler for constructing polymer-based composite dielectrics with promising properties. This work might pave a road for large-scale preparation of advanced dielectrics for capacitors.
研究领域:
材料科学
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电气工程
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DOI
高影响因子
Scientific Reports
·
2018
·Vol. 8
·期 1
·1-13
·
IF 4.122
Zheng Ke,Zhou Shaoqi,Zhou Xuan
A low-cost sulfonated polysulfone (SPSU)/poly(vinyl chloride) (PVC) substrate based high-performance thin-film composite (TFC) forward osmosis (FO) membrane was fabricated in this work. The results showed that the morphologies of the substrates were looser and more porous, and the porosity, pure water permeability, surface hydrophilicity, and average pore size of the substrates significantly improved after the SPSU was introduced into the PVC substrates. Furthermore, the SPSU/PVC-based TFC membranes exhibited rougher, looser and less crosslinked polyamide active layers than the neat PVC-based TFC membrane. The water permeability obviously increased, and the structure parameter dramatically declined. Moreover, the FO performance significantly improved (e.g. the water flux of TFC2.5 reached 25.53/48.37 LMH under FO/PRO mode by using 1.0 M NaCl/DI water as the draw/feed solution, while the specific salt flux exhibited a low value of 0.10/0.09 g/L). According to the results, it can be concluded that 2.5% of SPSU was the optimal blend ratio, which exhibited the lowest sulfonated material blend ratio compared to the data reported in the literature. Hence, this is a feasible and low-cost fabrication approach for high-performance FO membrane by using the cheap PVC and low blend-ratio SPSU as the membrane materials.
研究领域:
材料科学
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环境工程
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产品关联
DOI
PubMed
高影响因子
MATERIALS & DESIGN
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2017
·
IF 4.364
Yong Yang,Juncheng Huang,Ruoyu Zhang,Jin Zhu
A series of bio-based plasticizers based on isosorbide, a renewable monomer derived from glucose, were successfully synthesized. The chemical structures of the synthesized isosorbide diesters with different alkyl chain length were confirmed by FTIR and 1 H NMR. The influence of varying alkyl chain length on thermal and mechanical properties of isosorbide diesters in poly(vinyl chloride) (PVC) was investigated in detail. It was found that the plasticizing efficiency of isosorbide diester decreased as the alkyl chain length increased, reflecting on the gradually increased T g and the decreased elongation at break of PVC blend. However, the longer alkyl chain length of isosorbide diester improved the thermal stability of PVC blend and simultaneously depressed its volatility from PVC. Besides, the bio-based isosorbide diesters rivaled those petro-based phthalates, and they could be potential candidates to replace phthalates in the future industry.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
POLYMER
·
2026
·
IF 5.1
Xiao Luo,Lianglian Zhao,Weixun Ma,Changji Dong,Xiaobo Yang,Xingmao Duo,Xinghong Duo,Yakai Feng
In this study, a stimuli-responsive microcapsule flame retardant material, MgO@SiO 2 @rGO-β-CD, was successfully designed and prepared, and it was applied to polyvinyl chloride (PVC) to construct high-performance MgO@SiO 2 @rGO-β-CD/PVC composites. Amorphous SiO 2 was coated on the surface of MgO by the sol-gel process to form MgO@SiO 2 core-shell structure. Subsequently, the composite of reduced graphene oxide (rGO) and β-cyclodextrin (β-CD) was anchored on the surface of MgO@SiO 2 by ultrasound-assisted assembly to construct a multifunctional outer layer. The structure achieves stable binding through Si– O –Mg covalent bond and hydrogen bond interaction, and uses π-π stacking and hydrogen bond interaction to form a GO/β-CD dynamic outer layer to achieve controllable loading and release of dispersant polyethylene glycol (PEG). The microcapsule material triggers GO oxidative decomposition and β-CD/PEG inclusion complex dissociation above 250 °C, releasing the inner MgO and forming a carbon layer. When the addition amount was only 6 wt%, MgO@SiO 2 @rGO-β-CD/PVC composites exhibited excellent flame retardant and smoke suppression properties: The peak heat release and total heat release were reduced by 56% and 55%, respectively, compared with pure PVC. The limiting oxygen index of the composite was increased to 30.1% and passed the UL-94 V-1 rating. The microstructure characterization confirmed that the stimuli-responsive microcapsule flame retardant material MgO@SiO 2 @rGO-β-CD was uniformly dispersed in the matrix, and its multi-layer structure could catalyze the formation of a continuous and dense intumescent carbon layer during the combustion process, exerting the synergistic flame retardant mechanism of gas phase quenching, condensed phase barrier, and catalytic carbon formation.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Wei He,Guiqin Zhu,Yuan Gao,Hao Wu,Zheng Fang,Kai Guo
In this paper, the epoxidation process and the ring-opening reaction were integrated to develop an efficient bio-based plasticizer in a continuous flow mode. Four novel plasticizers based on epoxidized soybean oil (ESO) were prepared through integration of epoxidation catalyzed by α-Al 2 O 3 ·H 2 O and ring-opening reaction with H 2 SO 4 as a catalyst. α-Al 2 O 3 ·H 2 O with different D 50 values was applied in the epoxidation reaction to investigate the role of particle size in the catalytic efficiency. Reasonable combination and arrangement of micromixers and flow reactors promoted the epoxidation reaction. Modified micro-flow system consisting of two micro-mixers and fixed bed flow reactors was applied in the epoxidation process, yielding ESO with an oxirane value of 6.1. Four as-prepared plasticizers were compared comprehensively based on mechanical property. Introduction of different bonds into the skeleton of ESO resulted in different mechanical performance.
研究领域:
化学工程
·
材料科学
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 141
·期 8
·e54979
·
IF 3
Xiyan Jian,Jiaxin Sun,Xiaojing Gu,Changtong Song,Xianhong Zhang,Wantai Yang
Antibacterial polyvinyl chloride (PVC) materials have drawn considerable attention since their wide application in medical devices. The objective of this study is to develop a novel quaternary ammonium cationic vinyl chloride copolymer, which can be potentially used as antibacterial additive in PVC matrix. Initially, the low average-number molecular weight poly[(vinyl chloride)- co -(vinyl chloroacetate)] (PVC- co -PVCA) is synthesized by precipitation copolymerization. Subsequently, quaternary ammonium cationic moieties with different lengths of alkyl chains are introduced into the copolymers via quaternization reaction between alkyl-dimethyl tertiary amines with acyl chloride groups. The successful synthesis of PVC- co -PVCA and quaternarized copolymers are carefully confirmed by Fourier transform infrared spectroscopy, nuclear magnetic resonance (1H NMR), and x-ray photoelectron spectroscopy. The antibacterial behaviors of the quaternarized copolymers and its blends with PVC are investigated. The results reveal that all the PVC blends containing at least 5% by weight of quaternarized copolymer have superior bacteriostasis ratio (>99.6%) against both Escherichia coli ( E.coli ) and Staphylococcus aureus ( S. aureus ) due to the incorporation of quaternary ammonium groups. Meanwhile, the cationic copolymer exhibits excellent antifouling and much lower migration rate (<0.4%). These interesting consequences endow the quaternarized copolymers as alternative antibacterial agents possess a great deal of potential for use in PVC materials.
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高影响因子
THERMOCHIMICA ACTA
·
2022
·
IF 3.378
Mei Wang,Tong Wu,Quan Bu,Xianghai Song,Mei Li,Shouqi Yuan
The complex production process and uneven performance seriously restrict the application of Rare earth thermal stabilizer. In this study, the thermal stability behavior of metal organic framework Ce(1,3,5-BTC)(H 2 O) 6 (Ce-BTC) towards PVC was studied. Experimental results showed that the combination of Ce-BTC, 2,4,6-tris[di(hydroxymethyl) amino]-1,3,5-triazine (HHTT), and ESBO synergistically stabilized PVC sample displayed significantly improved initial color, meanwhile, the T s and the time of "zinc burning" were prolonged to 55.17 and 70 min, respectively, as well. During thermal treatment, HHTT can replace the unstable chlorine atoms on the PVC chain, and the incompletely coordinated Ce ions in Ce-BTC can inhibit the further polymerization of conjugated polyenes by reacting with the alkene chain resulted from PVC degradation, these two factors synertistically inhibit the degradation of PVC. The nertralization of HCl by HHTT and ESBO can provide longer reaction time for incompletely coordinated Ce ions and chlorine atoms, delaying the autocatalytic effect of HCl.
研究领域:
材料科学
·
高分子化学
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热稳定性
·
配位化学
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DOI
高影响因子
危险品化学品经营许可证（带存储）