Article
Chemistry, Multidisciplinary
Nancy G. Bush, Mikiyas K. Assefa, Selin Bac, Shaama Mallikarjun Sharada, Megan E. Fieser
Summary: In the presence of (xantphos)RhCl catalyst, reaction of poly(vinyl chloride) (PVC) with triethyl silane in THF leads to partial reduction of PVC via hydrodechlorination. Increasing catalyst loading or using N,N-dimethylacetamide (DMA) as a solvent decreases the selectivity for hydrodechlorination. Reaction of PVC with sodium formate in THF affords excellent selectivity for hydrodechlorination along with complete PVC dechlorination, while higher catalyst loadings are required. In contrast, reaction of PVC with NaH in DMA exhibits good selectivity for dehydrochlorination and higher reaction rates.
MATERIALS HORIZONS
(2023)
Article
Polymer Science
Katarzyna Skorczewska, Krzysztof Lewandowski, Piotr Szewczykowski, Slawomir Wilczewski, Joanna Szulc, Paulina Stopa, Paulina Nowakowska
Summary: This paper explores the characteristics of unplasticized PVC composites modified with biofiller obtained from waste eggshells, showing that the biofiller significantly improves thermal stability, increases the modulus of elasticity and softening point, and is suitable for traditional PVC mixtures' processing.
Review
Polymer Science
Krzysztof Lewandowski, Katarzyna Skorczewska
Summary: This article provides a literature review on the recycling of PVC, including mechanical recycling and feedstock recycling methods. It also introduces the characteristics of PVC and its potential in the circular economy.
Article
Chemistry, Applied
Carlos M. R. Abreu, Ana C. Fonseca, Daniela F. S. L. Rodrigues, Talita C. Rezende, Joana R. C. C. Marques, Arnaldo J. C. Tomas, Pedro M. F. O. Goncalves, Armenio C. Serra, Jorge F. J. Coelho
Summary: Industrially viable nonmigratory internal plasticization of poly(vinyl chloride) (PVC) is achieved through the synthesis of block copolymer poly(vinyl chloride)-b-poly(n-butyl acrylate)-b-poly(vinyl chloride) (PVC-b-PBA-b-PVC) using aqueous single electron transfer degenerative chain transfer living radical polymerization (SET-DTLRP) technique. The resulting copolymers showed better overall performance than commercial flexible PVC due to the introduction of a temperature step in the synthesis process. The non-migratory nature of the plasticizing moieties of the PVC-b-PBA-b-PVC block copolymers ensures the stability of the material after extraction.
REACTIVE & FUNCTIONAL POLYMERS
(2022)
Article
Polymer Science
Carmen Mijangos, Itxaso Calafel, Antxon Santamaria
Summary: Poly(vinyl chloride) (PVC) is a widely used commodity polymer that is continuously evolving. It has recently been demonstrated that PVC is suitable for extrusion-based 3D printing, allowing the production of tailored flexible and ductile PVC objects. This article describes the important characteristics of PVC, including production and applications, as well as its drawbacks of thermal degradation and plasticizer exudation. The article also discusses recent efforts and advances in overcoming these limitations and developing new applications through modification reactions and the use of PVC formulations in additive manufacturing.
Article
Polymer Science
Jacek Mirowski, Rafal Oliwa, Mariusz Oleksy, Jolanta Tomaszewska, Joanna Ryszkowska, Grzegorz Budzik
Summary: Adding 20% of raspberry pomace filler after extraction significantly extended the thermal stability time for the composites, but as the concentration of filler in the PVC matrix increased, the composite density, impact strength, and tensile strength values decreased significantly while their modulus of elasticity and Shore hardness increased.
Article
Multidisciplinary Sciences
Yi-Heng Lu, Zong-Lin Chen, Yu-Wei Lu
Summary: A PVC composite film doped with folic acid-modified titanium dioxide was synthesized to inhibit the agglomeration of nanotitanium dioxide. The results showed that the cohesiveness of the nanoparticles decreased after folic acid modification, leading to improved stability of PVC and reduced decomposition rate. The doped PVC film also suppressed the release of CO2 and enhanced the recovery of plasticizer.
SCIENTIFIC REPORTS
(2022)
Article
Polymer Science
Tjasa Rijavec, Matija Strlic, Irena Kralj Cigic
Summary: Yellowing of plastic objects is a common challenge in heritage conservation due to chemical degradation. This study quantitatively evaluated the rate of degradation, measured as an increase in b* colour coordinate, under room conditions during long-term storage of heritage collections. Multiple linear regression analysis found that lower temperature, lower relative humidity, higher polymer molecular weight, and higher plasticizer content were associated with lower degradation rates. The activation energy was calculated to be 86 kJ/mol. The resulting model can be used to inform environmental management guidelines and prioritize vulnerable objects in heritage collections.
POLYMER DEGRADATION AND STABILITY
(2023)
Article
Chemistry, Multidisciplinary
Danielle E. Fagnani, Dukhan Kim, Sofia I. Camarero, Jose F. Alfaro, Anne J. McNeil
Summary: New approaches are needed to reduce and reuse plastic waste. This study shows that by using the HCl generated from PVC in a paired-electrolysis reaction to chlorinate arenes, PVC waste can be effectively utilized with a lower global warming potential compared to using HCl. This method may inspire other strategies for repurposing waste PVC and related polymers.
Review
Chemistry, Multidisciplinary
Xinyao Jiang, Bing Zhu, Maiyong Zhu
Summary: Polyvinyl chloride (PVC), an important plastic derived from petroleum, has been widely used in daily life due to its superior properties. However, the unmanaged increase of PVC in the natural world has led to serious environmental issues. In order to achieve sustainable development, PVC waste can be recycled, reused, or converted into other high-value chemicals. This review provides an overview of mechanical and chemical approaches to recycling PVC waste, as well as the challenges and future perspectives.
Article
Polymer Science
Woohyuk Choi, Woojin Lee, Yeong Jun Yu, Rodney D. Priestley, Jae Woo Chung, Seung-Yeop Kwak
Summary: The glass transition dynamics of polymers play a crucial role in determining their properties. Pyrene-labeled and pyrene-doped flexible PVC plasticized by ultra-small branched star poly(epsilon-caprolactone) were prepared to observe changes in fluorescence intensities with temperature. The study revealed limited movement of the labeled pyrene moieties along the PVC chains due to cooperative reptation motion, and showed that an increase in USB-SPCL content in flexible PVC can decrease fluorescence intensity reduction degrees while also potentially leading to an increase under certain conditions.
Article
Environmental Sciences
Junhao Qin, Shuqing Zeng, Xi Wang, Chuxia Lin
Summary: A batch experiment was conducted to observe the liberation of micro- and nano-sized plastic particles and plastic additive-originated organic compounds from poly(vinyl chloride) under radiation-free ambient conditions. The detachment of plastic fragments from the PVC film surfaces was driven by autocatalyzed oxidative degradation, leading to intensified weathering.
Article
Chemistry, Physical
Katarzyna Skorczewska, Joanna Szulc, Krzysztof Lewandowski, Anna Ligocka, Slawomir Wilczewski
Summary: The purpose of this study was to modify plasticised PVC with natural cassia oil (CO) to obtain a material with antimicrobial properties and selected mechanical properties. The modified material showed increased antioxidant activity with the increase in cassia oil content and the duration of action. The largest growth inhibition zones were observed for L. monocytogenes. The modifier had a plasticising effect on PVC, evidenced by the decrease in modulus of elasticity and T-g, and the increase in elongation at break. The developed material may find application in the packaging used to store minimally processed food as an active and/or functional material emitting antimicrobial agents.
Article
Chemistry, Physical
Wancen Xie, Alberto Tiraferri, Xuanyu Ji, Chen Chen, Yuhua Bai, John C. Crittenden, Baicang Liu
Summary: The study utilized a green solvent and environmentally friendly reaction method to fabricate PVC UF membranes with excellent fouling resistance, achieving good membrane performance in a short grafting time, providing a new approach to reduce environmental impacts.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Neha Choudhury, Ahyun Kim, Minseong Kim, Byeong-Su Kim
Summary: Poly(vinyl chloride) (PVC) is a widely used commodity plastic that is difficult to recycle and often discarded after use, causing environmental concerns. This study presents a mechanochemical degradation process that converts PVC into water-soluble biocompatible products. By introducing oxirane mechanophores into the polymer backbone and applying force, the polymer chain undergoes a ring-opening reaction, leading to the formation of acetals. Hydrolysis of the acetals further breaks down the polymer into low-molecular-weight fragments. This green alternative offers a solution to the environmental issues associated with PVC disposal.
ADVANCED MATERIALS
(2023)
Article
Environmental Sciences
Yunlong Chen, Yingping Huang, Hailin Tian, Liqun Ye, Ruiping Li, Chuncheng Chen, Zhongxu Dai, Di Huang
Summary: A new photocatalyst consisting of F ion-doped BiVO4 has been developed to efficiently degrade glyphosate and reduce toxic emissions of AMPA. The study demonstrates that the catalyst of 0.3F@BiVO4 at pH = 9 achieved the best suppression of AMPA formation.
JOURNAL OF ENVIRONMENTAL SCIENCES
(2023)
Review
Chemistry, Multidisciplinary
Qiao Wang, Xin Ying Kong, Yongye Wang, Li Wang, Yingping Huang, Hui Li, Tianyi Ma, Liqun Ye
Summary: This article provides an overview of the history of H2O2 photosynthesis and the progress made in organic semiconductor photocatalysts. It discusses the current issues in pure H2O-to-H2O2 photosynthesis and proposes solutions to address these problems.
Article
Chemistry, Multidisciplinary
Niu Huang, Chao Li, Shili Gan, Cancan Le, Huan Liu, Wei Liu, Liqun Ye
Summary: This study demonstrates the generation, storage, conversion, and utilization of photocatalytic hydrogen, using TiO2, Pt, and lactic acid as the photocatalyst, cocatalyst, and sacrificial reagent. The experiment helps students to acquire operational skills and understand the interdisciplinary knowledge involved in solving energy and environmental problems.
JOURNAL OF CHEMICAL EDUCATION
(2022)
Review
Environmental Sciences
Feng Hong, Hailin Tian, Xi Yuan, Shuchang Liu, Qintian Peng, Yan Shi, Lei Jin, Liqun Ye, Jinping Jia, Diwen Ying, Thomas Stephen Ramsey, Yingping Huang
Summary: This paper presents the use of hydrodynamic cavitation technology in wastewater treatment and the role of computational fluid dynamics (CFD) in optimizing cavitation yield and performance. The mathematical models of multiphase flow simulation and the advantages and shortcomings of each model are comprehensively described. Examples and methods of coupling CFD technology with experimental observations to investigate the hydrodynamic behavior of cavitating devices are also summarized. The advantages of CFD modeling and the future of CFD applications in this research area are discussed.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Chemistry, Multidisciplinary
Fengyun Su, Zhishuai Wang, Mengzhen Tian, Chunxia Yang, Haiquan Xie, Chenghua Ding, Xiaoli Jin, Jiaqi Chen, Liqun Ye
Summary: In this study, MoO2/g-C3N4 composites were prepared with Pt as a cocatalyst, significantly improving the photocatalytic efficiency for hydrogen production through water splitting.
CHEMISTRY-AN ASIAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Yixue Xu, Li Wang, Zhonglian Shi, Na Su, Chao Li, Yingping Huang, Niu Huang, Yu Deng, Hui Li, Tianyi Ma, Xin Ying Kong, Wenjing Lin, Ying Zhou, Liqun Ye
Summary: In this study, an efficient and selective photocatalytic method was proposed for the conversion of biomass polysaccharides into a large amount of carbon monoxide (CO) using novel high-entropy sulfide catalysts under mild reaction conditions. The selectivity of CO reached 99.1% among the gas products, demonstrating the potential of this method for sustainable fuel production from biomass resources.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Na Su, Yang Bai, Zhonglian Shi, Jiale Li, Yixue Xu, Daoxiong Li, Baolu Li, Liqun Ye, Yi He
Summary: In this work, an efficient and stable photocatalyst was developed by loading ReS2 nanoparticles onto a CdS/ZnS heterojunction. The interaction between CdS/ZnS heterojunction and ReS2 accelerates photogenerated charge migration and inhibits the recombination of photogenerated electrons and holes. This work not only improves photo catalytic activity and stability but also broadens the application of ReS2 as a cocatalyst.
Article
Chemistry, Multidisciplinary
Wei Liu, Run Xu, Weifeng Pan, Chao Li, Niu Huang, Yingping Huang, Liqun Ye
Summary: In this study, resorcinol formaldehyde (RF) was introduced for photothermal catalytic generation of H2O2, achieving a photosynthetic yield of approximately 2000 mu m within 40 min under solar irradiation. The solar-to-chemical conversion (SCC) efficiency reached up to 0.19% at 338 K, surpassing photocatalysis with a cooling system by a factor of about 2.5. The H2O2 generated by RF during the photothermal process was formed through a two-channel pathway, promoting overall H2O2 formation and enabling its usage for pollutant removal. This work provides a sustainable and economical route for efficient H2O2 synthesis.
Article
Clinical Neurology
Dongfang Wang, Huilin Chen, Jiaqiao Chen, Haoxian Ye, Xinwen Chen, Liqun Ye, Kun Yao, Nanping Tu, Huamei Dai, Fang Fan
Summary: This study compares the mental health status among left-behind adolescents, migrant adolescents, and local adolescents. The prevalence of mental health problems is higher for left-behind adolescents, especially for females, those with chronic illnesses, and with a family history of mental disorders. Family function and school climate are also associated with mental health among all three types of adolescents.
JOURNAL OF AFFECTIVE DISORDERS
(2023)
Article
Chemistry, Multidisciplinary
Chunqiu Han, Yuehan Cao, Wang Yu, Zeai Huang, Fan Dong, Liqun Ye, Shan Yu, Ying Zhou
Summary: By selectively cleaving the C-O bonds in CH3O* intermediates instead of the metal-O bonds, the formation of peroxidation products can be significantly prevented, thus modulating the conversion pathway of methane. This method allows methane to be converted to methanol with a higher rate (325.4 mu mol g(-1) h(-1)) and selectivity (87.0%) under room temperature and atmospheric pressure without the need for external oxidants.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Xian Shi, Li Wang, Weidong Dai, Xing'an Dong, Yang Bai, Liqun Ye
Summary: Heterojunction construction and defect engineering were combined to improve the CO2 photoreduction activity of Cu1.95S@CuS. The Z-scheme Cu1.95S@CuS heterostructure reduced charge carrier recombination and enhanced the directional carrier transfer, resulting in strengthened CO2 activation and photoreduction activity. The CO2 photoreduction pathway was explored by in situ Fourier transform infrared spectroscopy, and density functional theory calculations showed that surface Cu vacancies and heterojunction interfaces lowered the energy barrier for the rate determining step, enabling spontaneous reduction reaction. This work provides a strategy for designing heterojunction and deficient photocatalysts for solar energy conversion.
Article
Engineering, Chemical
Yong Zheng, Mingjin Li, Yongye Wang, Niu Huang, Wei Liu, Shan Chen, Xuepeng Ni, Kunming Li, Siwei Xiong, Yi Shen, Siliang Liu, Baolong Zhou, Niaz Ali Khan, Liqun Ye, Chao Zhang, Tianxi Liu
Summary: Fe-N-x nanoparticles-embedded porous carbons with a desired superstructure were synthesized using Fe-coordinated covalent triazine polymer and a hypersaline-confinement-conversion strategy. The resulting Fe/N@CNF-800 exhibited excellent catalytic performance for electrochemical oxygen reduction reaction, including high half-wave potential, dominant 4e(-) transfer approach, and great cycle stability. The assembled zinc-air battery using Fe/N-PCNF-800 showed superior performance compared to commercial Pt/C, highlighting the potential of metal nanoparticles-based carbon catalysts for energy-related electrocatalytic reactions and beyond.
FRONTIERS OF CHEMICAL SCIENCE AND ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Minghui Lv, Chan Luo, Jiale Li, Qin Zeng, Shenggao Wang, Wei Liu, Niu Huang, Liqun Ye, Yulin Zhang, Yong Zheng
Summary: In this work, an efficient and stable electrocatalyst MoS2-Co@NCNTs was reported, which underwent electrochemical reconfiguration and produced high-valence molybdenum-oxygen compounds when tested in an oxygen-saturated electrolyte. The oxidized MoS2 nanoparticles significantly enhanced the hydrophilicity of Co@NCNTs, leading to enhanced catalytic performance compared to Co@NCNTs. Additionally, a PEO-PANa GPE with high electrical conductivity and excellent electrolyte absorption and retention capacity was reported. QSS-F-ZABs assembled with MoS2-Co@NCNTs and PEO-PANa GPE exhibited enhanced charge/discharge performance and long-cycle stability.
ACS MATERIALS LETTERS
(2023)
Editorial Material
Multidisciplinary Sciences
Yixue Xu, Li Wang, Liqun Ye
CHINESE SCIENCE BULLETIN-CHINESE
(2023)
Review
Chemistry, Multidisciplinary
Yong Zheng, Niaz Ali Khan, Xuepeng Ni, Kai A. I. Zhang, Yi Shen, Niu Huang, Xin Ying Kong, Liqun Ye
Summary: This review introduces the application of covalent triazine frameworks (CTFs) and their derivatives in sustainable electrochemical energy storage and conversion (EESC). Although CTFs have merits such as large surface area, tailorable conjugated structures, and excellent chemical and thermal stabilities, their poor conductivity limits their electrochemical performances. To overcome this challenge, CTF-based nanocomposites and derivatives like heteroatom-doped porous carbons have been proposed. This article also highlights the synthesis strategies for CTFs, the progress in electrochemical energy storage and conversion, and provides recommendations for the further development of CTF-based nanomaterials in EESC research.
CHEMICAL COMMUNICATIONS
(2023)
