JOURNAL OF APPLIED POLYMER SCIENCE
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2017
·Vol. 134
·期 29
·45093
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IF 1.86
Jianning Wu,Baoxun Sui,Lei Li,Guihua Meng,Xuhong Guo,Zhiyong Liu
A higher porosity with better thermostability is desirable for poly(vinyl chloride) (PVC) resin. In this study, high molecular weight PVC resins are prepared by vinyl chloride monomer (VCM)-diallyl phthalate (DAP) suspension copolymerization in a 20-L reactor at 50 °C using DAP as chain extender. SEM, BET, and analyses of plasticizer absorption results show the high molecular weight poly(vinyl chloride) (HPVC) by DAP-VCM copolymerization is loose and porous. With increasing DAP content when the mass ratio of DAP/VCM (ω ) is below the gel point, the porosity and the degree of polymerization increase. Nevertheless, the bulk density and particle size decrease. When more than the gel point, these relationships are reversed. Thermogravimetric analysis revealed that the HPVC had better thermostability than that of commercial PVC, and its thermostability increases with increasing ω before it reaches the gel point. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 45093.
研究领域:
高分子化学
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材料科学
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聚合物合成
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热分析
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多孔材料
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Food Analytical Methods
·
2015
·Vol. 9
·期 7
·2026-2035
·
IF 1.956
Du Jiaojiao,Gao Ruixia,Mu Hui
Phthalates represent a potential risk for humans, since they are ubiquitous environmental contaminants. Efficient extraction and purification procedures are demanded for the detection of low concentration levels of phthalates. In this work, a novel type of molecularly imprinted polymers coated onto the surface of vinyl functionalized multi-walled carbon nanotubes was synthesized and coupled with gas chromatography–mass spectrometry (GC/MS) for the selective separation and determination of dioctyl phthalate (DOP) in beverage samples. The morphology, structure property, and thermostability of the resultant polymers were characterized by transmission electron microscopy, Fourier transform infrared spectroscopy, and thermogravimetric analysis. The adsorption properties of the prepared polymers were investigated by equilibrium rebinding and competitive experiments. The resultant imprinted nanomaterials exhibited high capacity and favorable selectivity. In addition, the feasibility of the developed method using the obtained imprinted polymers as a solid-phase sorbent coupled with GC/MS for the selective isolation and determination of DOP in different beverage samples was demonstrated. Under optimal conditions, the limit of detection of the proposed method for DOP was 2.3 ng L −1 . DOP spiked at three levels of concentration in beverage samples was extracted and determined through the application of the present method, with recoveries ranging from 88.6 to 93.0 % with relative standard deviations less than 5.6 %.
研究领域:
分析化学
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环境毒理学
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食品安全
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分子识别
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材料科学
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色谱分析
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CHROMATOGRAPHIA
·
2018
·Vol. 82
·期 3
·683-693
·
IF 1.401
Shen Chen,Wu Tong,Zang Xiaohuan
In this work, a zeolitic imidazolate framework-based graphene oxide composite (ZIF-8@GO) was prepared and used as the adsorbent in hollow fiber stir bar sorptive extraction. The stir bar was constructed of a small section of hollow fiber filled with 5 mg ZIF-8@GO and a thin stainless wire of 1.5 cm long in its lumen, and used to extract the trace levels of phthalate esters from children’s food samples prior to gas chromatography–mass spectrometric detection. The ZIF-8@GO showed a high adsorption efficiency for the compounds containing aromatic rings. The main experimental parameters that can impact the extraction efficiency including extraction temperature, extraction time, stirring rate, sample salinity, and desorption conditions were investigated. Under the optimized conditions, the limits of detection (LODs) for the five phthalate esters (diethyl phthalate, dipropyl phthalate, diisobutyl phthalate, butylbenzyl phthalate, and di(2-ethylhexyl) phthalate) were 0.15–0.6 µg L −1 for CiCi beverage and pear juice samples, and 0.75–2.2 µg kg −1 for jam samples. The limits of quantitation (LOQs) were 0.5–2.0 µg L −1 for CiCi beverage and pear juice samples, and 2.5–7.5 µg kg −1 for jam samples. Wide linear ranges of 0.5–500.0 µg L −1 and 2.5–2000 µg kg −1 were obtained for CiCi beverage, pear juice samples and jam samples, respectively, with good repeatability (RSD < 11%) and high method recoveries (72%–100%). The lifetime test results showed that the ZIF-8@GO-based hollow fiber stir bar can be reused for 120 extraction cycles without a significant loss of extraction efficiency, indicating its high durability and stability. The established method was applied successfully for the determination of the phthalate esters (PAEs) in children’s food samples. Graphical abstract
研究领域:
分析化学
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食品安全
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环境毒理学
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暴露科学
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食品化学
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污染物检测
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Min Tang,Wu Liu,Jinquan Wan,Shiyu Zuo,Zhiyong Wang,Rui Peng
Fenton-like oxidation is often hampered by high energy barriers, uncontrolled oxidation pathways, and inefficient reactive oxygen species (ROS) utilization. Here, we report an energy-driven confined catalytic nanoreactor that leverages the in-situ confinement energy generated within nanopores to fundamentally regulate degradation thermodynamics. Taking sulfamethoxazole (SMX) as a model contaminant, the confined nanoreactor exhibited a 22.11-fold higher kinetic constant (0.157 min −1 ) and 40 % enhanced mineralization efficiency compared with its non-confined system. The imprinting channel of confined nanoreactor enabled selective adsorption of SMX within the nanochannel, inducing pronounced confinement effects. The resulting confinement energy triggered a low-entropy degradation pathway (ΔS reduced by 3.2 × 10 3 -fold), which broke thermal equilibrium constraints and redirected SMX oxidation along a low-energy-barrier route. The in-situ confinement-induced low-entropy reaction not only accelerated pollutant degradation but also improved ROS conversion efficiency. This study demonstrated a green and sustainable approach to overcome the intrinsic efficiency bottleneck of Fenton-like processes and provide a new perspective on exploiting nanoconfinement effects for environmental remediation.
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Journal of Environmental Sciences
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2026
·
IF 6.5
Ning Hu,Kaikai Zheng,Weiwei Wei,Xiaowen Fang,Yingqing Guo,Xian Xiao,Yuan Zhao
Distinct root exudate profiles are linked to root morphology in emergent plants. • We observed similar rhizosphere microbial communities despite distinct root exudate profiles. • Root exudates of Z. latifolia exert chemotactic attraction toward denitrifiers such as Pseudomonas and Acinetobacter . • Core metabolites, including phthalic acid and allantoin, can predict shifts in denitrification microorganisms. Emergent plants with different root morphologies show considerable variation in their nitrogen removal capabilities via nitrification and denitrification processes; however, the underlying mechanisms are still unknown. This study investigates how root morphology influences root exudates and rhizosphere microbial communities in two emergent plant species: Zizania latifolia (taprooted) and Pontederia cordata (fibrous-rooted). Root exudates were collected and analyzed using ultra-high performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS), revealing distinct metabolic profiles between the two species. Z. latifolia primarily secreted benzenoids, while P. cordata exuded higher levels of lipids and lipid-like molecules. Despite these differences, the rhizosphere bacterial and fungal communities of both plants were similar in both structures and potential functions. Interestingly, the differential metabolites identified in Z. latifolia root exudates, especially amino acids (e.g., L-Valine and D-Proline), exhibited significant and positive correlations with denitrifying bacterial genera, such as Pseudomonas and Acinetobacter , suggesting that these metabolites exhibit strong chemotactic attraction toward specific microbial communities. Specifically, the chemotactic response of Pseudomonas sp. and Acinetobacter sp. to phthalic acid, allantoin, and quinic acid confirmed that these metabolites might recruit denitrifying microorganisms through chemotaxis. These findings highlight the complex interactions between root exudates, rhizosphere microbes, and nitrogen cycling in emergent plants, providing insights for optimizing wetland restoration strategies. Download: Download high-res image (351KB) Download: Download full-size image
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
·
IF 9.6
Dongfei Sun,Minghui Xue,Huanle Niu,Ni Zhang,Junlin Yang,Jingxin Zhao,Bingang Xu
Aqueous zinc-ion batteries (AZIBs) represent promising candidates for large-scale energy storage owing to their inherent safety, low cost, and environmental friendliness. However, developing cathode materials that simultaneously achieve high capacity and long-term cycling stability remains a critical challenge. Herein, we report the rational design and synthesis of a series of Vanadium trioxide/Vanadium nitride (V 2 O 3 /VN) heterostructured composites through a controlled partial nitridation process using a vanadium-based metal–organic framework as a precursor. This strategy enables the in-situ formation of a conductive carbon matrix and the construction of an intimate heterointerface between V 2 O 3 and VN. A key innovation lies in the precise tuning of the V 2 O 3 -to-VN ratio, which governs the heterostructure morphology, defect concentration, and resulting electrochemical properties. The optimized V 2 O 3 /VN composite leverages the complementary attributes of its constituents: the structural stability and high theoretical capacity of V 2 O 3 , along with the superior electrical conductivity and electrochemical activity of VN. Synergistic effects at the heterointerface not only facilitate rapid electron and ion transport but also effectively accommodate volume variations during repeated cycling. Moreover, the presence of oxygen vacancies enhances Zn 2+ adsorption and diffusion kinetics. Therefore, the V 2 O 3 /VN cathode delivers a high specific capacity of 528 mAh g −1 at 0.1 A g −1 , and retains 244 mAh g −1 after 2000 cycles at 5 A g −1 , corresponding to a capacity fading rate of 0.025% per cycle. This work highlights the critical roles of component ratio optimization and interface engineering, providing a promising strategy for the development of advanced AZIB cathodes. The V₂O₃/VN heterostructure cathode leverages synergistic effects of rapid heterointerface charge transfer, carbon buffering, and oxygen vacancy-enhanced kinetics, delivering outstanding rate capability and cycling stability for aqueous zinc-ion batteries. Download: Download high-res image (144KB) Download: Download full-size image
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WORLD JOURNAL OF MICROBIOLOGY & BIOTECHNOLOGY
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2026
·Vol. 42
·期 7
·398
·
IF 4.7
Lequan Qiu,Mengyuan Bao,Zhongqing Yu,Longkuan Wang,Tongtong Li,Shijin Wu
Phthalic acid (PA) is a key intermediate in the biodegradation of phthalate esters (PAEs), and its aerobic degradation pathways exhibit considerable diversity. In this study, a novel aerobic PA degradation bypass was discovered in Klebsiella variicola SY1. After blocking the classical 4,5-dioxygenase pathway, the strain retained the ability to utilize PA, and gene 5193 encoding a UbiD family decarboxylase was significantly upregulated. Further knockout of gene 5193 caused the loss of PA utilization ability. Metabolomic and LC-MS analysis revealed that this bypass is initiated by 4-monooxygenation of PA to 4-hydroxyphthalic acid, followed by decarboxylation to 4-hydroxybenzoic acid, which then enters protocatechuic acid or phenol metabolism. Heterologous expression of gene 5193 did not confer the ability to convert PA or 4-hydroxyphthalic acid (4-HP), indicating that its product is not directly responsible for substrate conversion. Furthermore, by constructing a constitutive expression vector and introducing the esterase gene pehA , the recombinant strain achieved degradation rates exceeding 90% for dimethyl phthalate, diethyl phthalate, and dibutyl phthalate, effectively broadening the substrate spectrum. This finding enriches the understanding of the diversity of aerobic PA metabolism and provides both a strain resource and theoretical support for the bioremediation of phthalate ester pollution.
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JOURNAL OF APPLIED POLYMER SCIENCE
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2026
·
IF 2.8
Shuqing Sun,Jianyu Gong,Rui Yuan,Li Gao,Bingxin Liu,Shiai Xu
Phthalate plasticizers are the most commonly used plasticizers for soft PVC, but their composite materials are highly prone to cracking in low-temperature environments, leading to significant economic losses. Enhancing the cold resistance of plasticizers may be key to solving this issue. Therefore, this study employs dioctyl phthalate (DOP) as the primary plasticizer and synergistically blends it with the synthesized cold-resistant plasticizers dioctyl adipate (DOA) and dioctyl sebacate (DOS). Experimental results demonstrate that the addition of DOA and DOS significantly improves the low-temperature toughness of PVC/DOP composite films. For instance, at −20°C, the elongation at break of PVC/DOP/DOA and PVC/DOP/DOS increased by 48% and 42%, respectively, compared to PVC/DOP. Similarly, the glass transition temperatures of the compounding film are also higher than those of PVC/DOP. Migration resistance tests indicate that blending DOP with DOA or DOS can slow the migration rate of both DOS and DOA within the resin. Additionally, low-temperature in situ Raman spectroscopy is employed to investigate structural changes in DOP/PVC films under extreme cold conditions. DOP gradually precipitates from the matrix phase and forms crystalline structures on the film surface under low temperatures. This leads to PVC plasticization failure, resulting in brittle fracture.
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Nature Communications
·
2026
·
IF 18.1
Li Xiaofan,Jiang Qi,Xia Deming,Xie Hong-bin,Chen Jingwen
Phthalate esters (PAEs) are of significant concern due to their ubiquitous persistence in homogeneous environments and severe health effects on respiratory, reproductive, and endocrine systems. However, their fates in heterogenous environments remains elusive. Here, using integrated microdroplet experiments, and ab initio molecular dynamics, we demonstrate that PAEs undergo spontaneous degradation with short half-lives (<10 min) on microdroplet surfaces, representing a 4 to 11 orders of magnitude enhancement compared with bulk aqueous or gaseous phases. This fast process is driven by a unique interfacial mechanism initiated by spontaneously generated hydroxyl radicals, leading to stepwise dealkylation and hydroxylation. Critically, this pathway produces hydroxylated and, predominantly, carboxylated transformation products (TPs). Computational toxicology models further predict that these TPs, especially the carboxylated ones, exhibit amplified human hepatotoxicity (up to 37.5-fold increase), enhanced skin sensitization (~1.5-fold increase), and comparable developmental toxicity with respect to the parent PAEs. The study fundamentally challenges our understanding of PAE environmental fate and highlights a previously unrecognized global risk vector due to rapid PAE transformation in ubiquitous microdroplet systems, necessitating urgent revision on environmental persistence models and risk assessment frameworks to incorporate interfacial chemistry.
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APPLIED AND ENVIRONMENTAL MICROBIOLOGY
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2026
·
IF 4.2
Pengrui Zhang,Haiyang Zhang,Xinyu Yang,Yuanli Wu,Shanshan Dai,Yanqin Ding,Shanshan Sun
Bacteria play an important role in the biodegradation of polycyclic aromatic hydrocarbons (PAHs), especially the more recalcitrant high-molecular-weight compounds like pyrene. In this study, we isolated and characterized a novel pyrene-degrading bacterium, Glutamicibacter soli ENR6, from petroleum-contaminated soil. Strain ENR6 was able to utilize various PAHs as sole carbon sources and degrade 88.8% of 50 mg L−1 pyrene and 76.8% of 100 mg L−1 pyrene within 15 days. During pyrene degradation, eight metabolites were detected, with 2,2′-diphenic acid emerging as the predominant intermediate. By day 7, 40.6% of the degraded pyrene had accumulated in the form of 2,2′-diphenic acid, which was subsequently metabolized via the phthalate pathway. To our knowledge, this is the first report identifying 2,2′-diphenic acid as an intermediate in pyrene degradation. Integrated genomic and transcriptomic analyses revealed four gene clusters (clusters I–IV) involved in pyrene degradation in strain ENR6. Reverse transcription-quantitative PCR (RT-qPCR) analysis demonstrated that these clusters were specifically induced by pyrene and its intermediates, with genes chr_3400-chr_3404 in cluster I strongly associated with 2,2′-diphenic acid degradation. Based on these findings, we propose a distinct 2,2′-diphenic acid-centered pathway for pyrene degradation in strain ENR6. This study not only broadens the bacterial repertoire available for PAH bioremediation but also provides new insights into the metabolic diversity of PAH-degrading microorganisms.
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JOURNAL OF HAZARDOUS MATERIALS
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2026
·
IF 10.6
Hong-Jia Huang,Dan Huang,Jiang-Bing Qiu,Si-Ying Li,Qing Han,Cai-Qin Cheng,Hao-Yun Zhang,Zong-Di Wang,Yi-Tong Huang,Li-Gong Zou,Ce-Hui Mo,Hong-Ye Li,Wei-Dong Yang,Nai-Xian Feng,Da-Wei Li
Di(2-ethylhexyl) phthalate (DEHP), a widely used plasticizer, is frequently detected in marine environments, raising significant ecological concerns. Biodegradation of DEHP through marine microalgae represents an eco-friendly strategy for effective pollution abatement in marine environments. This study examined the physiological and molecular responses of the dinoflagellate Alexandrium pacificum under DEHP stress and evaluated its ability to biodegrade DEHP. Following DEHP exposure, A. pacificum exhibited a high capacity for DEHP biodegradation, achieving complete removal (below the detection limit) at environmentally relevant concentrations (≤ 200 μg/L) within 72 h, without detectable adverse effects on growth or photosynthesis. The degradation intermediates of DEHP involved β-oxidation, hydrolysis, de-esterification, and aromatic ring cleavage. Notably, DEHP exposure markedly suppressed paralytic shellfish toxin (PST) biosynthesis in A. pacificum , with concentrations of C1, C2, and GTX5 decreasing by 98.7%, 99.6%, and 98.2%, respectively. Transcriptomic analysis indicated that genes involved in DEHP degradation, such as fadB , hppD , xylG , and lysA , were upregulated, whereas PST biosynthesis genes ( SxtD , SxtL , SxtU ) were downregulated, suggesting that A. pacificum actively metabolizes DEHP while concurrently suppressing toxin production. Overall, this study provides comprehensive molecular insights for DEHP biodegradation by marine microalgae and highlights their capacity for effective PAE removal, contributing to ecological health and global seafood safety.
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EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY
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2026
·
IF 6.7
Mingzhu Zhang,Ke Wang,Guoli Li,Xinlu Bao,Kebin Ye,Aoyun Cui,Jishuang Zhang,Lin Zhou
Photodegradation-targeting chimeras (PDTACs) addresses the off-target toxicity issues of proteolysis-targeting chimeras (PROTACs) in terms of technical principle; Difficulty in defining tumor boundaries and controlling light exposure increases the risk of damaging peritumoral tissues if light exposure oversteps the tumor. This study discovered that compared to SV-HUC-1 cells (normal cells), Von Hippel-Lindau (VHL) exhibits more active regulation of CDK2/4 in T24 cells (bladder cancer cells); Based on this, a series of PDTACs linking VHL ligands to photosensitizers were synthesized, and ZnPc-PEG 2 -VH032 was selected as the most potent antitumor compound. This compound degrades VHL upon light exposure and, when combined with photodynamic therapy (PDT), efficiently kills T24 cells with a phototoxicity index (PI) of 36,397. More importantly, after illumination, ZnPc-PEG 2 -VH032 exhibited a selectivity index (SI) of 749 for killing T24 cells versus SV-HUC-1 cells, achieving selective tumor cell targeting under light conditions and effectively mitigating the risk of damage to peritumoral tissues. This study demonstrates the potential of VHL as a precision therapeutic target for tumors and identifies the first PDTAC drug characterized by high PI and SI. It provides novel insights and structural references for developing drugs that selectively kill tumor cells.
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