PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS
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2025
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IF 3.3
Zhuang Haoran,Chu Yiwen,Wang Menglin,Liu Bo,Chen Bihua,Lin Ziyu,Li Zhenxia
The mechanisms underlying phytohormonal disruptions caused by microplastic/plasticizer contamination in agricultural systems remain poorly understood. This study systematically investigates how polyethylene (PE), polystyrene (PS), polyvinyl chloride (PVC), and di- n -octyl phthalate (DOP) alter endogenous hormone networks in agricultural systems. Integrated transcriptomic-metabolomic analyses were conducted on cucumber plants grown in hydroponic and soil systems exposed to microplastics (PE, PS, PVC) and DOP. Hormonal pathways were deciphered via gene expression profiling of key biosynthesis regulators. Microplastics and DOP primarily affected the tryptophan-dependent auxin biosynthesis pathway. Differentially expressed genes (DEGs) related to cytokinin biosynthesis were involved in the de novo synthesis pathway. All treatments primarily regulated the expression of DEGs encoding the enzymes gibberellin-20-oxidase (GA20ox), gibberellin-2-oxidase (GA2ox), and gibberellin-3-oxidase (GA3ox) to maintain the balance of active gibberellins. Changes in abscisic acid metabolite levels were linked to the expression of DEGs for abscisic aldehyde oxidase (ABA2). All treatments reduced the ethylene biosynthesis rate. Cucumber plants regulate the expression of DEGs related to phytochrome B (PHYB)-activated inhibitor 1 (CYP734A1) to maintain a balance of endogenous brassinosteroids. Jasmonic acid levels significantly increased after PE, PS, and PS + DOP treatments. Salicylic acid pathways remained unaffected despite phenylalanine ammonia lyase gene variations. PE and PS exhibit significantly stronger impacts on endogenous hormone biosynthesis in cucumber plants compared with PVC. PS with the co-presence of DOP synergistically enhancing jasmonic acid biosynthesis. Notably, smaller PS particle sizes facilitate their absorption by cucumber roots while simultaneously suppressing auxin synthesis efficiency.
研究领域:
植物科学
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环境毒理学
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生物信息学
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农业化学
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分子生物学
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DOI
PubMed
高影响因子
Nature Communications
·
2022
·Vol. 13
·期 1
·1-13
·
IF 17.694
Yao Mengmeng,Wei Zhijian,Li Junjin,Guo Zhicheng,Yan Zhuojun,Sun Xia,Yu Qingyu,Wu Xiaojun,Yu Chaojie,Yao Fanglian,Feng Shiqing,Zhang Hong,Li Junjie
Zwitterionic hydrogels exhibit eminent nonfouling and hemocompatibility. Several key challenges hinder their application as coating materials for blood-contacting biomedical devices, including weak mechanical strength and low adhesion to the substrate. Here, we report a poly(carboxybetaine) microgel reinforced poly(sulfobetaine) (pCBM/pSB) pure zwitterionic hydrogel with excellent mechanical robustness and anti-swelling properties. The pCBM/pSB hydrogel coating was bonded to the PVC substrate via the entanglement network between the pSB and PVC chain. Moreover, the pCBM/pSB hydrogel coating can maintain favorable stability even after 21 d PBS shearing, 0.5 h strong water flushing, 1000 underwater bends, and 100 sandpaper abrasions. Notably, the pCBM/pSB hydrogel coated PVC tubing can not only mitigate the foreign body response but also prevent thrombus formation ex vivo in rats and rabbits blood circulation without anticoagulants. This work provides new insights to guide the design of pure zwitterionic hydrogel coatings for biomedical devices.
研究领域:
生物材料
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生物医学工程
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材料科学
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DOI
PubMed
高影响因子
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
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2020
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IF 1.701
Long Wang,Zhiming Wang,Cuo Zhou,Weijun Song,Chunyan Sun
A cesium potentiometric microsensor based on magnetic ion-imprinted polymer (MIIP) has been developed for Cs(I) sensing. The core-shell structure Cs(I)-MIIP was synthesized by surface-imprinting technique, using functionalized magnetic Fe3O4@SiO2 microspheres, Cs(I) ion and carboxymethyl chitosan as supporter, template and functional monomers respectively. The resultant Cs(I)-MIIP was used as ionophore in the construction of the PVC membrane electrode to obtain a selective potentiometric microsensor toward Cs(I) ions. The fabricated sensor exhibited a highly sensitive Nernstian response (60.2 mV/decade) over the concentration range of 1 × 10−6 to 1 × 10−1 M of Cs(I). The response time of the microsensor was considerably short (less than 3 s) and its detection limit was determined as 3.0 × 10−7 M. The microsensor was effectively performed in the pH range of 4–6, and revealed desirable selectivity over a wide variety of other cations including alkali, alkaline earth and heavy metals. The proposed microsensor was also used for the determination of Cs(I) contents in the environmental water samples. The potentiometric results were in good harmony with the results obtained by the ICP-MS method.
研究领域:
分析化学
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环境科学
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材料科学
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DOI
高影响因子
JOURNAL OF VINYL & ADDITIVE TECHNOLOGY
·
2021
·Vol. 28
·期 4
·696-705
·
IF 1.993
Zhimin Fu,Zhanhong Yang,Lie Deng,Yao Rong,Jian Wu
The tris(hydroxymethyl)aminomethane (THAM) and its derivative (DHD 2-([1,3-dihydroxypropan-2-ylidene]amino)-2-(hydroxymethyl)propane-1,3-diol) have been used as organic thermal stabilizers for flexible poly(vinyl chloride) (PVC). According to dehydrochlorination and discoloration tests conducted at 180°C, THAM showed to be an excellent organic thermal stabilizer for flexible PVC, not only THAM stabilizer improved the thermal stability of PVC but also maintained the initial color of the PVC. The induction time and the thermal stability time were 52 and 55.5 min, respectively. DHD can also be used as an organic thermal stabilizer for flexible PVC; however, its thermal stabilizing efficiency was not satisfactory, but it has a good synergistic effect with traditional cadmium–zinc soap stabilizers. Besides, the experiments had been performed to investigate pentaerythritol (PER) and THAM, two substances with similar structure, but such a huge difference in thermal stabilizing efficiency for flexible PVC. THAM did improve the thermal stability of PVC, both in initial whiteness and long-term thermal stability. But PER has no thermal stabilizing efficiency for PVC when used alone. At the end of the article, the probable mechanism which can give an explanation for the stabilizing efficiency given by the THAM has been proposed.
研究领域:
材料科学
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高分子化学
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热工程
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
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IF 13.2
Wenjun Fu,Juan Luo,Shichang Shun,Jiangyi Luo,Chengling Liu,Rui Ma
The release of elemental chlorine in the form of HCl and the low quality of the product in the pyrolysis process of polyvinyl chloride (PVC) are constraints to its resource application. Furthermore, the regulation of chlorine migration and conversion processes also requires urgent attention. To address these shortcomings, we selected five metal oxides (M x O y ), namely MgO, CaO, Fe 2 O 3 , CuO, and ZnO, to construct an M x O y catalyst system with the functions of microwave absorption-catalysis-chlorine fixation. By discussing the composition of pyrolysis products, dielectric property analysis, oxygen vacancy (OV) defect analysis, and density functional theory (DFT) calculations under different catalyst systems, the mechanism of microwave absorption-catalysis-chlorine fixation was revealed. The results showed that ZnO had outstanding performance in microwave absorption, catalysis, and chlorine fixation: the optimal microwave absorption of ZnO increased the heating rate by 30 % (up to 19.67 °C/min) compared with the pyrolysis of PVC alone. The excellent O V content significantly catalyzed the C C bond breaking and dehydrogenation, reaction and facilitated the generation of lightweight products dominated by H 2 and CO. The chlorination reaction between ZnO and HCl had a lower reaction energy barrier, achieving a solid chlorine efficiency of 75.02 %. This work systematically evaluated and elucidated the trifunctional performance and mechanism of M x O y during low-temperature microwave pyrolysis of PVC.
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DOI
高影响因子
POLYMER
·
2023
·
IF 4.6
Changtong Song,Xianhong Zhang,Yuhong Ma,Wantai Yang
Developing internal-plasticized poly(vinyl chloride) (PVC) resin has been recognized as an effective way to deal with the issues of conventional PVC products such as toxicity and deterioration in properties caused by the migration of plasticizer . Herein, the copolymerization of vinyl chloride with commercial available poly(ethylene glycol) monomethyl ether methacrylate (PEGMA) is firstly conducted via suspension polymerization and internally plasticized random copolymers (PVEGA) are synthesized successfully. These PVEGA copolymers were intensively characterized by FTIR, 1 H NMR, GPC , DSC, DMTA , and SEM to determine the composition , number-average molecular weight ( M n ), dispersity, glass transition temperature ( T g ), and the micromorphology. As a result, the high transparency and the fracture images demonstrated the good compatability between PVC chains with long-chain polyether . The T g of PVEGA decreased gradually from 80 to 0 °C with the fraction of PEGMA in the copolymer increased from 7 to 37 %. Furthermore, the PVEGA copolymer exhibits outstanding processibility and mechanical performance. Under optimal composition , the tensile strength and the elongation at break can reach to 8 MPa and 525 %, respectively. Meanwhile, the PVEGA copolymers exhibit much lower migration either in water or in orgnic solvent and excellent performance in hemolysis and cytotoxicity, showing great application potential in medical devices .
研究领域:
材料科学
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化学工程
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生物医学工程
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2026
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IF 19.7
Jie Li,Yuxiang Yang,Guangtong Xu,Xiangxu Du,Anbang Dai,Yangchuan Ke
Spatially orthogonal CeO x –Zn sites were integrated into aerogel-derived hierarchical HZSM-5. • CeO x shifted HCl release and chlorinated-intermediate conversion to lower temperatures. • Zn promoted BTX-selective aromatization of dechlorinated and oxygenated fragments. • Accessibility-weighted bifunctional catalysis enabled cleaner and higher-value PVC/PET upcycling. Catalytic upcycling of chlorine-containing mixed plastics remains limited by the intrinsic conflict between efficient dechlorination and high-selectivity aromatization. Here we report a spatially orthogonal CeO x –Zn/Aero-40 catalyst derived from a diatomite-aerogel-templated hierarchical HZSM-5 support, in which CeO x -rich outer mesopores and Zn-containing MFI channels are integrated into a gated tandem architecture. The hierarchized support decreased the mean particle size from 386 ± 42 nm for Conv-40–274 ± 31 nm for Aero-40 and retained a shortened crystallite length of 289 ± 24 nm after dual-site loading, while exposing 3.01 wt% surface Ce and 1.86 wt% surface Zn on CeO x –Zn/Aero-40. Under the optimized two-stage conditions, CeO x -Zn/Aero-40 affords a BTX yield of 64.0 wt% on the initial dry-polymer feed basis, a BTX selectivity of 90.0% within the quantified liquid aromatics, and a dechlorination efficiency of 98.9%. Product-family analysis showed that aromatics rose to 71% whereas organochlorines fell to 2%; chlorine balance further demonstrated that 88% of chlorine was released as gaseous HCl, with only 3% remaining as oil-phase organochlorine. Taken together, the time-resolved spectroscopic/thermal analyses, probe experiments and kinetic measurements are consistent with a functionally staged mechanism in which Ce-associated sites facilitate low-temperature HCl elimination and chlorine management, whereas Zn-associated acid environments favor downstream cyclization/dehydrogenation-aromatization toward BTX. The DFT calculations support the intrinsic feasibility of these site-specific elementary steps but do not, by themselves, establish dynamic inter-site kinetic coupling. Across ten independent parallel runs, the mean BTX yield was 63.9 wt% of the initial dry polymer feed (RSD 1.0%), while the mean dechlorination efficiency was 98.8% (RSD 0.2%), retained 96.3% Zn after five cycles, and maintained high dechlorination efficiency for model and real feeds. These results establish a hierarchical dual-site zeolite platform for chlorine-tolerant aromatics-oriented upcycling of PVC/PET mixed plastics. Download: Download high-res image (274KB) Download: Download full-size image
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DOI
高影响因子
JOURNAL OF POLYMER SCIENCE
·
2023
·
IF 3.4
Changtong Song,Hongyi Shu,Xianhong Zhang,Yuhong Ma,Dong Chen,Wantai Yang
Herein, low molecular weight poly(vinyl chloride- co -n-butyl acrylate- co -vinyl acetate) (PCBV) ternary copolymers with varied copolymer composition was employed as a novel polymeric lubricant in rigid PVC. The lubrication effect of PCBVs on the melting process and mechanical properties of the final PVC products were fully investigated. The results indicated that PCBV can serve either as an internal or as an external lubricant depending on its composition. PCBV-45.5 terpolymer (PBA% ~ 45.5%) exhibits outstanding balance both internal and external lubricating roles. SEM-EDS results show that addition PCBV-45.5 form a film on the surface of PVC grains as similar as that adding both internal and external lubricants. Fusion characteristics and DMTA demonstrate that PCBV-45.5 prolongs the fusion time (26% extension, 1.5 phr) and reduces the glass transition temperature (4.0 °C, 1.5 phr). Finally, the mechanical properties of rigid PVC have been greatly improved by using 1.5 phr PCBV-45.5. In detail, the tensile strength increased from 54 to 59 MPa and the elongation at break increased from 10% to 30%, respectively. Meanwhile, the impact strength of PVC/PCBV-45.5 is 3.6 times that of the blend without addition. The excellent performance of PCBV exhibited great potential as a polymeric lubricant candidate in rigid PVC composites. Graphical
研究领域:
材料科学
·
高分子化学
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DOI
高影响因子
ACS Nano
·
2024
·
IF 15.8
Yunxia Ji,Libang Chen,Yunqing Wang,Jinjin Zhang,Yue Yu,Meirong Wang,Xiaoyan Wang,Weili Liu,Bing Yan,Liang Xiao,Xiaodong Song,Changjun Lv,Lingxin Chen
The smaller size fraction of plastics may be more substantially existing and detrimental than larger-sized particles. However, reports on nanoplastics (NPs), especially their airborne occurrences and potential health hazards to the respiratory system, are scarce. Previous studies limit the understanding of their real respiratory effects, since sphere-type polystyrene (PS) nanoparticles differ from NPs occurring in nature with respect to their physicochemical properties. Here, we employ a mechanical breakdown method, producing NPs directly from bulk plastic, preserving NP properties in nature. We report that among four relatively high abundance NP materials PS, polyethylene terephthalate (PET), polyvinyl chloride (PVC), and polyethylene (PE) with a size of 100 nm, PVC induced slightly more severe lung toxicity profiles compared to the other plastics. The lung cytotoxicity of NPs is higher than that of commercial PS NPs and comparable to natural particles silicon dioxide (SiO2) and anatase titanium dioxide (TiO2). Mechanistically, BH3-interacting domain death agonist (Bid) transactivation-mediated mitochondrial dysfunction and nuclear receptor coactivator 4 (NCOA4)-mediated ferritinophagy or ferroptosis are likely common mechanisms of NPs regardless of their chemical composition. This study provides relatively comprehensive data for evaluating the risk of atmospheric NPs to lung health.
研究领域:
环境科学
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毒理学
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材料科学
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呼吸医学
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产品关联
DOI
PubMed
高影响因子
BIOMACROMOLECULES
·
2021
·
IF 6.988
Kangwen Ouyang,Jie Zhuang,Chuchu Chen,Xuerong Wang,Mengting Xu,Zhaoyang Xu
Recently, because of the unique properties of anisotropic and isotropic structures, there are more research studies on anisotropic hydrogels. We prepared a gradient anisotropic carboxymethyl cellulose hydrogel (CMC-Al3+) by directionally diffusing aluminum chloride solution. The orientation of carboxymethyl cellulose (CMC) chains is perpendicular to the direction of aluminum ion diffusion. The degree of cross-linking and orientation gradually decrease along the direction of aluminum ion diffusion. Compared with anisotropic hydrogels prepared by other methods, the hydrogels prepared by directionally diffusing aluminum ion solution have a gradient lamellar structure. Because of the large amount of aluminum ions in CMC-Al3+, the hydrogel shows good sensing performance. CMC-Al3+ is packaged with PVC electrical flame retardant tape to produce a strain sensor used to detect human tiny movements, which can accurately and stably monitor tiny movements. Hydrogel-based strain sensors can be widely used in the fields of human–computer intelligence, human–computer interaction, and wearable devices in the future.
研究领域:
材料科学
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生物传感器
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可穿戴技术
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人机交互
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DOI
高影响因子
JOURNAL OF NANOBIOTECHNOLOGY
·
2022
·Vol. 20
·期 1
·1-19
·
IF 9.429
Wang Yue,Cai Bingyue,Ni Dalong,Sun Yu,Wang Gang,Jiang Hong
Background The endotracheal tube (ETT) is an essential medical device to secure the airway patency in patients undergoing mechanical ventilation or general anesthesia. However, long-term intubation eventually leads to complete occlusion, ETTs potentiate biofilm-related infections, such as ventilator-associated pneumonia. ETTs are mainly composed of medical polyvinyl chloride (PVC), which adheres to microorganisms to form biofilms. Thus, a simple and efficient method was developed to fabricate CS-AgNPs@PAAm-Gelatin nanocomposite coating to achieve dual antibacterial and antifouling effects.Results The PAAm-Gelatin (PAAm = polyacrylamide) molecular chain gel has an interpenetrating network with a good hydrophilicity and formed strong covalent bonds with PVC-ETTs, wherein silver nanoparticles were used as antibacterial agents. The CS-AgNPs@PAAm-Gelatin coating showed great resistance and antibacterial effects against Staphylococcus aureus and Pseudomonas aeruginosa. Its antifouling ability was tested using cell, protein, and platelet adhesion assays. Additionally, both properties were comprehensively evaluated using an artificial broncho-lung model in vitro and a porcine mechanical ventilation model in vivo. These remarkable results were further confirmed that the CS-AgNPs@PAAm-Gelatin coating exhibited an excellent antibacterial capacity, an excellent stain resistance, and a good biocompatibility.Conclusion sThe CS-AgNPs@PAAm-Gelatin nanocomposite coating effectively prevents the occlusion and biofilm-related infection of PVC-ETTs by enhancing the antibacterial and antifouling properties, and so has great potential for future clinical applications.Graphical Abstract
研究领域:
生物医学工程
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材料科学
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传染病
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医疗器械
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产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Wenrui He,Sui’an Wan,Meng Xu,Wei Wei,Dongfang Wang,Chuan Yi,Yufeng Zhao
The extensive use of microplastics (MPs) and antibiotics has not only exacerbated environmental pollution, but the composite pollutants formed by them also pose escalating ecological risks. This study investigated the impact of aging time on the biodegradable polylactic acid (PLA) and non-degradable polyvinyl chloride (PVC), as well as the adsorption/desorption behavior of norfloxacin (NOR), ciprofloxacin (CIP), and sulfamethoxazole (SMZ) onto these MPs. The effects of ultraviolet (UV) aging (30, 60, and 90 days) on MPs’ physicochemical properties and adsorption performance were systematically evaluated. The results showed that UV aging altered MPs’ surface morphology, crystallinity, and surface charge, enhancing their adsorption capacity. Adsorption kinetics followed the pseudo-second-order model, while isotherms aligned with the Freundlich model, indicating multilayer adsorption governed by physical and chemical interactions (e.g., hydrogen bonding, electrostatic, hydrophobic, and π-π interactions). The adsorption capacities followed the order NOR > CIP > SMZ, with aged PLA exhibiting superior performance (PLA-90d > PLA-60d > PLA-30d > pristine PLA > PVC-90d > PVC-60d > PVC-30d > pristine PVC). PLA exhibited a higher adsorption capacity for antibiotics than PVC, indicating that biodegradable MPs have a stronger ability to adsorb organic pollutants. Desorption experiments were conducted in different pH and waters. The results revealed that PLA-90d and PVC-90d exhibited the highest NOR release rates (30.43 % and 24.64 %, respectively) at pH 11, with seawater promoting greater desorption than lake or ultrapure water due to ionic competition. These findings highlight the critical role of aging in amplifying MPs’ environmental risks as carriers of antibiotics.
研究领域:
环境科学
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污染生态学
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高分子材料科学
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水污染与治理
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环境化学
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吸附技术
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材料老化
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海洋污染
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生态毒理学
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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）