POLYMERS FOR ADVANCED TECHNOLOGIES
·
2024
·Vol. 35
·期 12
·e70011
·
IF 3.1
Jinsheng Duan,Chuxuan Deng,Zhaogang Liu,Yilin Li,Peijie Jia,Yanhong Hu,Xiaowei Zhang,Jinxiu Wu,Jianfei Li
This study systematically examines the effects of diphenylphosphinic acid (DPPA) and sarcosine (SAR) intercalation into magnesium aluminum lanthanum hydrotalcite (LDHs) on its structure and thermal stability. Using charge distribution, structural optimization, energy calculations, XRD, FTIR, TEM, and thermal stability tests, the study reveals that DPPA anions, with higher negative charge density, increase the interlayer spacing to 6.08 Å and exhibit a binding energy of −0.7624 eV. SAR anions, with a thinner interlayer spacing of 4.11 Å and a binding energy of −1.603 eV, create a more stable structure. SAR's higher dipole moment (2.827 a.u.) compared to DPPA (2.077 a.u.) enhances electrostatic interactions. Thermal stability tests show SAR-LDHs and DPPA-LDHs extend PVC's stability to 53.67 and 56.67 min, respectively. DPPA anions provide superior stability at high temperatures, while SAR anions excel in moderate temperatures. This study offers insights for designing thermally stable composite materials.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 30
·期 1
·69-78
·
IF 2.324
Li Jian,Yang Shengliang,Zhou Hongming,Wang Lihua,Yang Zhaohui,Meng Pengyu,Hu Leshan,Hu Rong
SiO 2 /C composites using polyvinyl chloride (PVC) as carbon sources are prepared successfully via a facile and low-cost approach. In this paper, the effect of four coating ratios on the SiO 2 /C materials is investigated. When tested as an anode material for lithium-ion batteries, the samples possessing a high carbon content display a better electrochemical stability. The high-content PVC pyrolytic carbon can provide a malleable and high electrical conductivity carbon layer for SiO 2 , which has more defects and benefits the diffusion of Li ions between the electrolyte and SiO 2 /C. However, considering the low capacity of the PVC pyrolytic carbon, a carbon content of 25% was chosen as the best coating ratio. This SiO 2 /C electrode shows a reversible capacity of 695 mAh g −1 at a current density of 100 mA g −1 after 200 cycles, with a capacity retention of 86.4% after the first cycle. The electrode also displays a discharge capacity of 535 mAh g −1 at a current density of 1 A g −1 . Taking into consideration the facileness and the low cost of the synthetic method, this SiO 2 /C composite anode material may have a great prospect of industrialization.
研究领域:
材料科学
·
能源存储
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DOI
高影响因子
JOURNAL OF VINYL & ADDITIVE TECHNOLOGY
·
2023
·Vol. 29
·期 5
·864-876
·
IF 2.7
Chen Yu,Degang Li,Wenyuan Han,Yifan Kong,Lijie Zhang,Mingguang Chen,Kunsheng Hu
Titanium dioxide (TiO 2 ) has a strong oxidation effect when absorbing ultraviolet light. Therefore, when TiO 2 is used as a light stabilizer in polyvinyl chloride (PVC), it will cause the photodegradation of PVC. Herein, carbon quantum dots (CQDs) coated TiO 2 composite (TiO 2 @CQDs) was prepared by a one-step hydrothermal method. The prepared TiO 2 @CQDs were characterized by transmission electron microscopy (TEM), UV–Vis spectroscopy, X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD). The photostability of PVC film containing TiO 2 @CQDs was investigated via photodegradation conductivity test, weight loss rate test, and ultraviolet aging test. Due to the down-conversion effect of CQDs under ultraviolet light, its existence can alleviate the photoaging of PVC. In addition, the thermal stability of PVC containing TiO 2 @CQDs was studied by conductivity tests and oven thermal aging tests. The presence of CQDs significantly improved the thermal stability of PVC. Meanwhile, the HCl absorption capacity of CQDs could reach 30.8 mg/g cat . According to the DFT calculations, this high absorption capacity is attributed to the HCl immobilization effect via forming hydrogen bonds between HCl and the keto oxygen, carboxyl keto oxygen in CQDs. The hydroxyl group in CQDs could also combine ZnCl 2 by forming a coordination bond.
研究领域:
材料科学
·
高分子化学
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2018
·Vol. 42
·期 16
·13382-13392
·
IF 3.201
Ke Zheng,Shaoqi Zhou,Xuan Zhou
A series of low-cost poly(vinyl butyral) (PVB)/poly(vinyl chloride) (PVC) blended substrates were fabricated for the preparation of thin-film composite (TFC) forward osmosis (FO) membranes. The effect of PVB blend ratio on the substrate and TFC membrane was investigated. The results showed that the properties of the substrates were significantly improved and that the selective layer became looser, rougher, and less crosslinked after the introduction of PVB. The water permeability was initially improved when the PVB blend ratio increased from 0% to 30%. However, the NaCl rejection was rapidly declined with a further increase in the blend ratio, which should be ascribed to a decrease in the crosslinked degree of the PA selective layer. Meanwhile, the calculated results shows the value of structure parameter is sharply decreased to 186 μm for TFC30 from 2680 μm for TFC0. The results demonstrated that a PVB blend ratio of 30% should be the optimal ratio for fabrication of the substrate for the TFC membrane showing satisfactory FO performance: a high water flux of 29.37/49.85 L m−2 h−1 (FO/PRO mode) and a low specific salt flux of 0.11/0.10 g L−1 (FO/PRO mode) using 1 M NaCl as the draw solution and DI water as feed solution.
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
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2016
·
IF 5.557
Xin Kong,Ming-Yong Zhou,Chun-Er Lin,Jun Wang,Bin Zhao,Xiu-Zhen Wei,Bao-Ku Zhu
Thin film composite nanofiltration membranes were successfully prepared via interfacial polymerization between piperazine and trimesoyl chloride on poly(vinyl chloride) hollow fiber substrates with different properties. Both the polyamide layer and underlying substrate were characterized with respect to chemical and morphological structures. The effects of substrate properties on the characteristics of the prepared nanofiltration membranes were investigated. It is found from the results that the differences in substrate properties, mainly the membrane pore size and porosity had significant contributions to the changes in the thickness and cross-linking degree of poly(piperazine-amide) layer during the interfacial polymerization process, leading to the varied performance of the prepared nanofiltration membranes in terms of MgSO 4 rejection and permeate flux. The nanofiltration membrane prepared from the substrate with medium pore size and porosity exhibited a relatively higher permeate flux as well as a superior rejection for MgSO 4 , which showed typical rejection orders for different salts as well as good stabilities after backwash treatment and a long-term filtration process. These results indicate that the prepared poly(vinyl chloride) nanofiltration hollow fiber membranes could be applied to the desalination or water softening process.
研究领域:
材料科学
·
环境工程
·
化学工程
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Yuwei Wu,Min Yu,Chengbo Tian,David Vokoun,Runqi Hu,Hengzao Ge,Hao Zhang,Ivo Stachiv
Polyvinyl chloride (PVC) gel actuators exhibit a contraction-relaxation movement characterized by large strain and rapid response when electrically stimulated, comparable to that of biological muscles, making them attractive for artificial muscles and other actuation purposes. However, the standard fabrication of PVC gel by so-called solution casting has been found to be time-consuming (i.e., typically taking 4–7 days), cost-ineffective, and prone to skin/eyes irritation hazards, limiting its application potential. In this study, a thermal melting method using non-toxic and low-cost stabilizer was proposed to fabricate PVC gel in approximately 10 min. Experimental results show that under the fabrication conditions optimized by Taguchi orthogonal array, the actuation performance of PVC gel is improved, with a contraction strain of 20.62%, an output force of 0.43 N, and a recovery response time of 1.416 s, all of which are superior to that prepared by traditional method. These results open a doorway for fast, affordable, and easily accessible fabrication technology of PVC gel actuators.
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DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·
IF 5.8
Zhen Zhao-Gan,Luo Jun-Xiao,Su Yang,Xia Zi-Yuan,An Tong,Sun Zhao-Yong,Gou Min,Tang Yue-Qin
The effect of microplastics (MPs) retained in waste activated sludge (WAS) on anaerobic digestion (AD) performance has attracted more and more attention. However, their effect on thermophilic AD remains unclear. Here, the influence of polyvinyl chloride (PVC) MPs on methanogenesis and active microbial communities in mesophilic (37 °C) and thermophilic (55 °C) AD was investigated. The results showed that 1, 5, and 10 mg/L PVC MPs significantly promoted the cumulative methane yield in mesophilic AD by 5.62%, 7.36%, and 8.87%, respectively, while PVC MPs reduced that in thermophilic AD by 13.30%, 18.82%, and 19.99%, respectively. Moreover, propionate accumulation was only detected at the end of thermophilic AD with PVC MPs. Microbial community analysis indicated that PVC MPs in mesophilic AD enriched hydrolytic and acidifying bacteria ( Candidatus Competibacter, Lentimicrobium , Romboutsia , etc.) together with acetoclastic methanogens ( Methanosarcina , Methanosaeta ). By contrast, most carbohydrate-hydrolyzing bacteria, propionate-oxidizing bacterium ( Pelotomaculum ), and Methanosarcina were inhibited by PVC MPs in thermophilic AD. Network analysis further suggested that PVC MPs significantly changed the relationship of key microorganisms in the AD process. A stronger correlation among the above genera occurred in mesophilic AD, which may promote the methanogenic performance. These results suggested that PVC MPs affected mesophilic and thermophilic AD of WAS via changing microbial activities and interaction. Graphical abstract
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DOI
PubMed
高影响因子
MOLECULES
·
2019
·Vol. 24
·期 3
·420
·
IF 3.06
Bang-Jin Wang,Ai-Hong Duan,Jun-Hui Zhang,Sheng-Ming Xie,Qiu-E Cao,Li-Ming Yuan
Porous organic cages (POCs) have attracted extensive attention due to their unique structures and tremendous application potential in numerous areas. In this study, an enantioselective potentiometric sensor composed of a polyvinyl chloride (PVC) membrane electrode modified with CC3-R POC material was used for the recognition of enantiomers of 2-amino-1-butanol. After optimisation, the developed sensor exhibited enantioselectivity towardS-2-amino-1-butanol (logKS,RPot= −0.98) with acceptable sensitivity, and a near-Nernstian response of 25.8 ± 0.3 mV/decade within a pH range of 6.0–9.0.Keywords:enantioselective potentiometric sensor;2-amino-1-butanol;chiral porous organic cage;CC3-R;PVC membrane electrode
研究领域:
分析化学
·
材料科学
·
生物化学
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DOI
PubMed
高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 39
·e202404063
·
IF 1.9
Xiangmei Ma,Shengmin Pan,Yiqing Wu,Bin Wang
Graphical A novel composite (BCE) by depositing ethyl 3,4-dihydroxybenzoate on the surface of Bi2S3-doped CeO2 was synthesized, and the prepared BCE/polyvinyl chloride (PVC) composite films displaied excellent UV-shielding property, butbarely catalytic thermal decomposition of the PVC matrix. In this study, bismuth sulfide (Bi 2 S 3 )-doped cerium oxide (CeO 2 ) was prepared via hydrothermal method, and by depositing ethyl 3,4-dihydroxybenzoate (EDHB) on the surface of Bi 2 S 3 /CeO 2 (Bi 2 S 3 /CeO 2 /EDHB and BCE). The samples were characterized by FTIR, XRD, TEM, and UV–vis absorption spectrum means. According to the characterizations, Bi 2 S 3 was successfully incorporated into the CeO 2 structure (Bi 2 S 3 /CeO 2 ), and the prepared BCE/PVC composite films display excellent UV-shielding property. Moreover, the result of thermogravimetric analysis (TGA) tests indicated that BCE also was barely catalytic thermal decomposition of PVC matrix. This work not only paves an attractive way for the design of the CeO 2 -based UV-shielding agent, but also provides valuable insights into the inspiration to construct high-performance UV-shielding composites.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Xiang Shen,Tiande Xie,Jiangang Wang,Fan Wang
In this work, poly(N-acryloylmorpholine)-grafted ZrO 2 nanoparticles (ZrO 2 -g-PACMO) were directly blended with poly(vinyl chloride) (PVC) to prepare a hybrid membrane via the phase inversion method. In addition, the effects of ZrO 2 -g-PACMO and ZrO 2 nanoparticles on the structure and performance of resultant PVC membranes were comparatively investigated. The results indicated that the PVC/ZrO 2 -g-PACMO membrane exhibited a large macroviod of cross-section and a rough membrane surface. During membrane formation, the hydrophilic PACMO chains were preferably enriched onto the membrane surface, leading to the enhancement of surface hydrophilicity and the reduction of adhesion force between protein and membrane surface. The amount of adsorbed bovine serum albumin (BSA) on the poly(vinylidene fluoride)/ZrO 2 -g-PACMO decreases about 73% and 48% respectively, compared with original PVC and PVC/ZrO 2 membranes. Cycle filtration of pure water and BSA solution (0.5 g/L) confirmed that the total and irreversible membrane fouling were remarkably suppressed after incorporating ZrO 2 -g-PACMO into PVC membrane. Although the original ZrO 2 nanoparticle was also found to improve the protein fouling resistance of PVC membrane, there was a fatal limitation that the original ZrO 2 exhibited an agglomeration tendency during the membrane formation. The outcomes of the present work demonstrate that the synthesized ZrO 2 -g-PACMO nanoparticles have the potential for the design and preparation of anti-fouling PVC membrane.
研究领域:
材料科学
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膜技术
·
化学工程
✓ 已验证
DOI
高影响因子
Environmental Science-Processes & Impacts
·
2023
·Vol. 25
·期 12
·1962-1973
·
IF 5.5
Jine Wang,Chen Zhang,Rui Zhao,Pei Wang,Meihua Jin,Jiujun Xu
Marine biofouling is a thorny issue that causes serious economic losses and adverse ecological impacts on marine ecosystems. Effective and promising antifouling strategies such as surface hydration, flow shear force, and lubricant injection have been developed to address this challenge. However, for the complex marine environment, they still appear inadequate. Mussels are a common fouling organism with strong surface adhesion ability. However, when hypoxia and the oxidative cross-linking reaction of 3,4-dihydroxy phenyl-L-alanine (DOPA) in the structure of adhesion proteins are disrupted, their adhesion ability will be greatly reduced. Inspired by this, we developed an effective antifouling strategy based on reactive oxygen species (ROS) scavenging using N-acetylcysteine (NAC) and evaluated its performance. As a ROS scavenger interfered with the oxidative cross-linking reaction of DOPA in an aqueous solution, the adhesion of DOPA was also affected on the surface of NAC functionalized polyvinyl chloride (PVC) (PVC-NAC). In addition, the colonization level of mussels and the adhesion rate of marine bacteria and benthic diatoms on PVC-NAC were low. The antifouling strategy proposed in this paper was eco-friendly and broad-spectrum, and may provide a new idea for solving marine biofouling and reducing the environmental and economic impacts of fouling organisms.
研究领域:
海洋生物学
·
材料科学
·
环境科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2024
·
IF 3
Zou Yanyan,Li Yaoqiang,Zhang Jiaqing,Guo Yi,Song Tonglei,Li Kaiyuan,Xu Mingjun
The incineration of a large number of old cables leads to the problem of green recycling and causes a lot of environmental problems. This paper investigates the effect of copper oxide (CuO) capture of chlorine (Cl) in the pyrolysis recycling of polyvinyl chloride (PVC)-based waste cable outer sheath, focusing on the redistribution of the contaminant Cl components under the action of oxygen (O 2 ). Analytical methods such as ion chromatography and diffraction of X-rays are employed to measure and quantify the dynamic changes of the Cl-containing three-phase products during the pyrolysis process. The results indicate that, compared to copper (Cu), the oxidized state of CuO and O 2 -rich conditions can enhance the capture of Cl. With increasing O 2 supply, 1.71–6.33 mass% of gas-phase Cl and 14.52–29.96 mass% of liquid-phase Cl convert into 16.23–36.29 mass% of solid-phase Cl. CuO reacts directly with the PVC component of the outer sheath in a solid–solid reaction, significantly reducing the generation of polluting Cl-containing aromatic compounds in the liquid-phase tar and synergistically facilitating CaCO 3 components to intimately contact with the pyrolysis gas to capture HCl. The originally stable CuCl 2 crystals are oxidized again to enter into cyclic adsorption in the form of CuO under O 2 -rich conditions. Cl is more fixed in the residue and primarily exists in the form of stable and safe CuCl 2 and CaCl 2 metallic compounds. This study has clearly elucidated the efficient in situ green solidification mechanism of Cl during the treatment of cable waste with CuO in the presence of O 2 , providing new recommendations for cable sheath formulations and solid waste management.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）