POLYMER BULLETIN
·
2017
·Vol. 75
·期 3
·1123-1139
·
IF 1.43
Jiang Zhi,Wang Jingwen,Ge Renkui,Wu Chanjun
The effects of surface modification of ground calcium carbonate (GCC) particles on the thermal and mechanical properties of poly(vinyl chloride) (PVC) based composites were investigated. Aminopropyltrimethoxysilane (APS) was used as a modifier for GCC particles. The experimental results indicated that the pre-treatment of GCC particles with NaOH promoted the formation of OH − on the surface of GCC particles, which improved the graft of APS on GCC surface and enhanced the interfacial interaction between GCC particles and PVC matrix. The SEM micrographs of the PVC filled with different GCC particles showed that the dispersion of fillers in the PVC matrix was improved by surface modification. The results of TG showed that the thermal properties of PVC filled with NaOH/APS modified GCC particles (PVC/GCC–OH–APS) outweighed those of PVC filled with APS modified GCC particles (PVC/GCC–APS) or raw GCC particles (PVC/GCC). Compared with the use of raw GCC, the use of the surface modified GCC particles, especially the GCC–OH–APS, led to the increase of the tensile strength and impact strength of the composites.
研究领域:
材料科学
·
高分子化学
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DOI
高影响因子
Nature Communications
·
2026
·
IF 18.1
Zhiyun Wang,Ziwei Chen,Sheng Wang,Luna Cui,Minghao Tang,Xianhua Liu,Tao Wang,Xueping Li
Microplastics (MPs), ubiquitous environmental pollutants, can enter the human body and exacerbate health risks. Polyvinyl chloride MPs (PVC-MPs) are emerging contaminants of particular concern due to direct clinical exposure pathway. However, the role of PVC-MPs in pathogenic bacterial infections remains poorly understood. Here, we investigate the role of PVC-MPs for the pathogenicity of uropathogenic Escherichia coli (UPEC), the primary causative agent of urinary tract infections (UTIs). Results demonstrate that PVC-MPs significantly enhance both acute and chronic UTIs. Mechanically, PVC-MPs act as carriers, enriching UPEC on their surface and enhancing UPEC invasion of bladder epithelial cells (BECs) via receptor-independent pathway, thereby promoting UPEC colonization in mouse bladders and kidneys. After entering BECs, intracellular PVC-MPs induce mitochondrial dysfunction, causing mitochondrial reactive oxygen species accumulation and mitochondrial DNA leakage, which activate Caspase-1-dependent pyroptosis, promoting urothelial cell shedding and UPEC chronic infection. These findings establish PVC-MPs as mediators of UTI pathogenesis, providing critical mechanistic insights into how environmental pollutant exposure may enhance susceptibility to infectious diseases. Polyvinyl chloride microplastics have been detected within clinical settings and may influence bacterial infections. Here, the authors demonstrate that these microplastics facilitate acute infection by uropathogenic E. coli, helping the bacteria evade immune cells and increase shedding.
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DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Yilin Li,Jinsheng Duan,Zhaogang Liu,Feng Guo,Peijie Jia,Junchang Fan,Shuxin Wu,Yanhong Hu,Jinxiu Wu,Xiaowei Zhang,Jianfei Li
To address the thermal instability of polyvinyl chloride (PVC) and the environmental risks of conventional stabilizers, cyanurate-intercalated layered double hydroxides (LDHs), including MgAl-LDH (MA), La-doped MgAl-LDH (MAL), and Ca/La-doped MgAl-LDH (CMAL), were synthesized. Comprehensive XRD, FTIR, TGA, and SEM characterization confirmed the structural integrity of the samples. These LDHs were incorporated into PVC to fabricate composite materials, whose thermal stabilization efficiency was systematically evaluated through accelerated aging, Congo red, and dynamic thermal stability tests. Thermogravimetric analysis revealed that CMAL/PVC exhibited the highest initial decomposition temperature (281°C), surpassing MA/PVC (270°C), MAL/PVC (274°C), and neat PVC (256°C). Consistent enhancements were observed in color retention and HCl scavenging capacity, which correlated with increased thermal degradation resistance. Mechanistic studies demonstrated that cyanuric acid-modified LDHs effectively suppressed autocatalytic HCl elimination and conjugated polyene formation during the thermal aging process at 180°C and the HCl absorption experiment. The multimetal synergy in CMAL enhanced Cl − coordination and acid neutralization, thereby inhibiting PVC degradation cascades. This work provides fundamental insights into designing eco-friendly LDH-based thermal stabilizers for high-performance PVC applications, demonstrating significant potential for sustainable polymer engineering.
研究领域:
材料科学
·
高分子科学
·
环境科学
·
化学工程
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2018
·
IF 6.578
Wanyi Fu,Lan Wang,Fangjuan Chen,Xuezhi Zhang,Wen Zhang
To unravel fouling and defouling mechanisms of protein, saccharides and natural organic matters (NOM) on polymeric membrane during filtration, this study investigated filtration characteristics on polyvinyl chloride (PVC) ultrafiltration membranes with bovine serum albumin, dextran , humic acid as model foulants. Membrane fouling and defouling performances were analyzed through monitoring the flux decline during filtration and flux recovery during physical backwash. Physico-chemical properties (e.g., hydrophobicity and surface charge) of PVC membrane and foulants were characterized, which were used in the extended Derjaguin–Landau–Verwey–Overbeek (EDLVO) theory to calculate the interaction energies between membrane-foulant and foulant-foulant. The results showed that at the later filtration stages the fouling rate was strongly correlated with the deposition rate , which was determined by the interaction energy profile calculated by EDLVO. Moreover, the adhesion forces of membrane–foulant and foulant–foulant were further measured by atomic force microscopy (AFM) with modified colloidal probes. A positive correlation ( R 2 = 0.845) between particle detachment rate (determined by adhesion force) and defouling rate was developed for BSA and HA foulants that led to cake layer formation. By contrast, dextran defouling rate was off this correlation as dextran partially clogged membrane pores due to its smaller size.
研究领域:
环境科学
·
膜分离技术
·
高分子材料
·
胶体与界面化学
·
水处理
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2018
·Vol. 136
·期 4
·47004
·
IF 1.901
Yanqin Shi,Yating Wang,Biao Ma,Meng Ma,Si Chen,Xu Wang
Two novel thermal stabilizers, zinc and calcium oxolinic complexes (Zn(Oxo) 2 and Ca(Oxo) 2 ), with superior tensile properties and notable thermal stability effect for polyvinyl chloride (PVC) are reported here. The complexes are synthesized without any organic solvents, and the structures are confirmed as Zn(C 13 H 10 NO 5 ) 2 ·H 2 O and Ca(C 13 H 10 NO 5 ) 2 ·3H 2 O by Fourier transform infrared spectroscopy, thermogravimetric analysis, X-ray fluorescence spectrometry, and elemental analysis. The PVC samples stabilized with the complexes show superior tensile strength and elongation at break compared with zinc and calcium stearates by tensile test. The results of Congo red test, dehydrochlorination test, and discoloration test show that: (1) Zn(Oxo) 2 is better than zinc stearate as thermal stabilizer for PVC; (2) Zn(Oxo) 2 and Ca(Oxo) 2 show notable synergistic effect with calcium stearate and zinc norfloxacin respectively. The mechanism of the superior tensile properties and notable thermal stability effect is due to the ability of the complexes to absorbing HCl and reacting with PVC chains, which result in the special chain extension of PVC and the delay of autocatalytic effect and zipper-like dehydrochlorination. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47004.
研究领域:
材料科学
·
高分子化学
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产品关联
DOI
高影响因子
Silicon
·
2018
·Vol. 10
·期 6
·2845-2854
·
IF 1.246
Zhang Bin,Jiang Yujie,Han Jian
Although research on halogen free flame retardant has achieved great progress, its practical application is restricted due to high additive amount and low efficency. To solve this problem, multilayers microcapsule [melamine–formaldehyde resin (MF)/silicon dioxide (SiO 2 )/zinc hydroxystannate (ZHS)] was prepared through a two-step method. Moreover, when 16.40 wt% SiO 2 /ZHS microcapsules was mixed with poly(vinyl chloride) (PVC) matrix, the obtained PVC composites exhibited a high limited oxygen index (LOI) of 32.5%, showing its excellent flame retardancy. Furthermore, for the compatibility between MF/SiO 2 /ZHS microcapsules and PVC to be improved, MF was coated to SiO 2 /ZHS microcapsules by in situ polymerization. When 16.40 wt% MF/SiO 2 /ZHS microcapsules were mixed with PVC matrix, the obtained PVC composites exhibited a high LOI of 35.5%, showing its high flame retardancy. Therefore, this easily prepared multilayers microcapsule with sufficient flame retardancy in this work, it could have a potential for engineering applications.
Taking advantage of microencapsulation strategy to fabricate MF/SiO2/ZHS microcapsules for fire-retardant PVC materials
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2018
·
IF 6.578
Ming-Yong Zhou,Li-Feng Fang,Chuang-Chao Sun,Chun-Er Lin,Bao-Ku Zhu,Jiang-Hua Chen
Different from the typical interfacial polymerization for nanofiltration membrane fabrication, we proposed a novel method to prepare charged nanofiltration membrane via rapid immersion thermal annealing process with the ultrafiltration membrane, which was prepared from the amphiphilic copolymer , poly(vinyl chloride) -g- poly(2-(dimethylamino)ethyl methacrylate) (PVC -g- PDMA) via non-solvent induced phase separation. The pore structures and chemical properties of the membranes, and annealing conditions including the media where the membrane was annealed, annealing temperature and time, were investigated in detail. It is found that the porous separation layer was collapsed to be a stable, defect-free, and smooth film as the dense separation layer of nanofiltration membrane when it was annealed in n -heptane above its glass transition temperature ( T g ) for only 1 min while the pore size cutoff was tailored from 20 nm to 2 nm. Salt rejections were in the order of MgCl 2 > NaCl > MgSO 4 > Na 2 SO 4 at neutral condition due to Donnan repulsion, indicating a typical positively charged nanofiltration membrane. Overall, this rapid immersion thermal annealing process provides a facile and effective strategy to tailor ultrafiltration membrane toward nanofiltration applications for amphiphilic copolymer based membranes.
研究领域:
材料科学
·
化学工程
·
膜技术
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产品关联
DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2017
·
IF 2.429
Dongri WANG,Yongqing ZHAO,Shiyong YU
A series of cerium sulfides were successfully prepared using commercially available nanoscale CeO 2 as precursor, anhydrous Na 2 CO 3 as dopants, CS 2 as sulfur source, under 600–800 °C, respectively. Properties of samples were investigated by means of X-ray diffraction (XRD), scanning electron microscopy (SEM) and spectrophotometry. The results showed that corresponding γ-Ce 2 S 3 with small size was obtained by using nanoscale CeO 2 as precursor; pure phase γ-Ce 2 S 3 could be obtained under low temperature of 700 °C. Coloring properties of γ-Ce 2 S 3 obtained under 800 °C were studied by researching γ-Ce 2 S 3 /PE and γ-Ce 2 S 3 /PVC composites, respectively. The results showed that satisfied coloring effects to PE and PVC were obtained by using 0.5 phr and 0.2 phr γ-Ce 2 S 3 , respectively.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Guo Peng,Wu Yaoqin,Sun Changmei,Ji Chunnuan,Zhang Ying,Qu Rongjun,Wang Ying
In this paper, p -aramid nanoparticles ( p -ANPs) were successfully prepared in polyvinyl chloride (PVC) solution by in-situ condensation of para-phenylenediamine (PPD) and para-benzoyl chloride (TPC). Transmission electron microscopy (TEM) images showed that p -ANPs with diameters of 4–7 nm were distributed in PVC matrix evenly. The obtained solution could be directly used as casting solution to prepare p -ANP/PVC composite ultrafiltration membranes by phase inversion technology. The cross-section structure and surface roughness of the ultrafiltration membranes were studied by scanning electron microscopy (SEM) and atomic force microscopy (AFM). The mechanical properties , hydrophilicity and ultrafiltration properties of the membranes were also studied. It was confirmed that p -ANP enhanced the mechanical properties of the ultrafiltration membrane, improved the hydrophilicity of the membrane surface, and improved the antifouling properties. Meanwhile, good rejection and flux performance were maintained. The novel and facile preparation method of p -aramid nanomaterials and its composites is of great significance for prompting new applications of aramid fibers .
研究领域:
材料科学
·
纳米技术
·
膜科学
·
化学工程
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2022
·
IF 4.326
Zheming Zhang,Pingping Jiang,Phyu Thin Wai,Shan Feng,Minjia Lu,Pingbo Zhang,Yan Leng,Lingen Pan,Jie Pan
A novel green plasticizer, cyclohexyl ester-capped glutaric acid oligomeric lactate (CGOL) with many poly(lactic acid) (PLA) matrix repeating units, applicable for plasticizing both poly(vinyl chloride) (PVC) and PLA, was designed and developed through a two-step esterification reaction route. Due to the growing concerns about the environment and health, we used biobased raw materials to synthesize the biobased plasticizer with the hope of potentially replacing petroleum-based plasticizers that are already widely used. The molecular structure of CGOL was confirmed, and then CGOL was blended with PVC or PLA for performance testing. Compared with commercial plasticizers, it had better comprehensive plasticization performance, showing high thermal stability, mechanical stability, and migration stability in both PVC and PLA polymers, which could be demonstrated by thermogravimetric analysis, tensile tests, and migration resistance test results. Among all PVC blends containing 50 phr plasticizer, CGOL plasticized PVC films exhibited the highest elongation at break (736.3%) and initial degradation temperature (Ti, CGOL-50 = 273.5 °C), the lowest glass transition temperature (Tg = 24.8 °C), and minimal migration in various environments, better than that of commercial ATBC, DOTP, and DOP. As for PLA blends, CGOL plasticized PLA films outperformed PLA/ATBC films in terms of comprehensive performance. Overall, CGOL demonstrated potential as a novel green substitute plasticizer for preparing flexible products of PVC and PLA.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
E-POLYMERS
·
2023
·Vol. 23
·期 1
·
IF 3.7
Xiang Wang,Chao Di,Tingwei Wang
Heat stabilizers are crucial additives for enhancing the thermal stability of polyvinyl chloride (PVC) during processing. Among the various heat stabilizers available, organic tin compounds have shown remarkable effectiveness. In this study, we investigated the use of dimethyltin dineodecanoate (DMTDN), dibutyltin dineodecanoate (DBTDN), and dioctyltin dineodecanoate (DOTDN) as heat stabilizers for PVC. These compounds were combined with calcium stearate (CaSt 2 ) and zinc stearate (ZnSt 2 ) to improve the thermal stability of PVC materials. The results demonstrated that the thermal stabilization effects of the three tin neodecanoates, when used as standalone heat stabilizers, followed the order: DOTDN > DBTDN > DMTDN. Notably, the thermal stability and lubricity of the three-component heat stabilizer (MTN 5 -C 4 Z 1 , BTN 5 -C 4 Z 1 , and OTN 5 -C 4 Z 1 , respectively), which consisted of the three types of tin neodecanoate, CaSt 2 , and ZnSt 2 in a ratio of 5:4:1, outperformed the use of tin neodecanoate alone. This study offered potential formulations to reduce the application cost of tin neodecanoate as a PVC heat stabilizer.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2023
·
IF 8.8
Weizhen Zhang,Jing Liu,Qi Li,Yunxing Xiao,Yumiao Zhang,Ningfei Lei,Qianchao Wang
Microplastics (MPs) and per- and polyfluoroalkyl substances (PFASs) have drawn significant attention as emerging threats to aquatic ecosystems . There are currently just a few investigations on the combined toxicity of PFAS and MP on freshwater microalgae. In this research, the combined toxicity of polyvinyl chloride (PVC) and perfluorooctanoic acid (PFOA) to Microcystis aeruginosa was investigated. The results indicated that the combination of these pollutants inhibited the growth of M. aeruginosa and promoted the synthesis and release of Microcystin-LR (MC-LR). Individual and combined exposure caused different responses to cellular oxidative stress . Under the Individual exposure of PFOA, when the concentration was greater than 20.0 mg/L, the catalase (CAT) activity increased significantly, and when it was greater than 100.0 mg/L, the malondialdehyde (MDA) content increased significantly, but there is no significant change under combined exposure. PVC and PFOA exposure also caused physical damage to the algal cells and reduced the content of extracellular polymer substances (EPS) based on analysis of cell morphology. Metabolic analysis revealed that carbohydrate metabolism and amino acid metabolism of the algae were affected. The current study offers a fresh theoretical framework for MPs and PFASs environmental risk evaluations.
研究领域:
环境科学
·
毒理学
·
水生生态学
·
生物化学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）