iScience
·
2026
·
IF 4.5
Qixian xie,Bowen Guo,Yichen Zhang,Tianze Yang,Chenfang Cui,Zhengliang Liu,Honglin Yao,Baili Li,Wurong Ren
The integration of the KHCO 3 fed bipolar membrane (BPM) electrolyzer with KOH based CO 2 capture enables directly in situ conversion of captured CO 2 into valuable carbonaceous products, eliminating costly CO 2 recovery and compression steps. Even this integrated BPM system assembly holds promise, the critical lack of CO 2 adsorption intermediate species tracking necessitates the development of a monitoring platform. This work pioneers a novel dual-modal strategy employing simultaneous indicator-based sensing with in situ UV-Vis spectroscopy, achieving real time visualization of triphasic dynamics during integrated CO 2 capture-regeneration-conversion. Within this synergistic process involving Ar-saturated KHCO 3 decomposition, and electrochemical reduction, an etched indium (In) catalyst achieves 50% formate Faradaic efficiency (FE) at -1.1 V vs. RHE. The synergistic application of these complementary in situ diagnostics unlocks fundamental mechanistic insights into integrated CO 2 capture and conversion systems, establishing them as critical enablers for advancing efficient and scalable electrochemical CO 2 valorization.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Zhongyao Zhang,Hengyu Zhong,Yanjiao Xu,Mengbo Zhang,Haomiao Zhang,Jingdai Wang,Yongrong Yang
Methylaluminoxane (MAO) is a critical activator in olefin polymerization, but it exhibits limited stability under high temperatures or prolonged storage. In industrial processes, MAO is typically concentrated by heating in toluene under vacuum and stored for months before use, however, the effects of these processes on its stability are poorly understood. We investigate the stability of freshly prepared MAO subjected to heat treatment and long-term storage, focusing on changes in aluminum content, methyl-to-aluminum ratio, polymerization activity, and properties of the resulting polymer. Our results demonstrate that higher temperatures, extended treatment or storage times, and increased initial MAO mass fractions contribute to gel formation within MAO solutions, declining cocatalytic activity. Using heat-treated-MAO/Cp2ZrCl2 for ethylene polymerization results in PE with reduced molecular weight compared to fresh MAO, while the effect on dispersity (D̵) is complex, exhibiting both increases and decreases in different cases. The aging of MAO leads to the formation of insoluble, high-molecular-weight gels. Analysis of the gel phase reveals an elevated Me/Al ratio, indicating selective partitioning of MAO species during gelation. Scanning electron microscopy (SEM) reveals that these gels consist of coalesced, interconnected clusters with a porous, amorphous morphology composed of nanoscale primary particles. Such morphological evolution correlates with the observed decline in polymerization activity. Our findings offer insights for optimizing MAO concentration processes and storage conditions to preserve its performance in industrial applications.
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LWT-FOOD SCIENCE AND TECHNOLOGY
·
2026
·
IF 7.1
Bailong Wang,Ru Jia,Wenjing Chen,Zebin Guo
Modified lotus seed starch (LS) through enzymatic debranching (ED) and high hydrostatic pressure (HHP) treatment demonstrates enhanced microencapsulation performance for conjugated linoleic acid (CLA). This study systematically investigated the structural and functional modifications of LS under ED treatment (0-12 h) combined with HHP (300-600 MPa). ED treatment induced significant chain-length redistribution, increasing A-chain (15.3% to 24.6%) and B 1 -chain (42.1% to 51.3%) proportions while decreasing B 2 (23.4% to 15.1%) and B 3 chains (19.2% to 9.0%). The modified starch (P-LS) exhibited 47.3% higher solubility with reduced swelling power (8.35 g/g) and adhesiveness (2.2 mm). Optimal microencapsulation efficiency (92.7%) and oxidative stability were achieved at 3-6 h ED combined with 300-600 MPa HHP. SEM characterization revealed HHP-induced formation of a porous network structure in P-LS-CLA microcapsules, accompanied by improved thermal stability (ΔH increased by 28.6%) compared to native starch. These findings establish the synergistic mechanism between enzyme modification and HHP processing for developing starch-based delivery systems, particularly highlighting HHP's potential for thermosensitive ingredient encapsulation in functional food applications.
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MOLECULES
·
2023
·Vol. 28
·期 5
·2246
·
IF 4.6
Cuichuan Zhang,Zhiqiang Lu,Bin Wu,Shu-Dong Jiang,Jiasheng Qian
Poly(vinylidene fluoride) was grafted with maleic anhydride through reactive extrusion by using diisopropyl benzene peroxide as an initiator and 9-vinyl anthracene as a stabilizer. Effects of various parameters on grafting degree were investigated including the amounts of monomer, initiator and stabilizer. The maximum extent of grafting achieved was 0.74%. The graft polymers were characterized using FTIR, water contact angle, thermal, mechanical and XRD studies. Improved hydrophilic and mechanical properties were observed for graft polymers.Keywords:PVDF;MAH;stem grafting;melt extrusion
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Yong Li,Pei Wang,Maoshuang Chen,Jinlin Chen,Wenjia Huang,Shuangfei Xiang,Shujun Zhao,Feiya Fu,Xiangdong Liu
Natural cotton fibers have attached considerable attention due to their excellent wearing comfort, breathability and warmth. However, it remains a challenge to devise a scalable and facile strategy to retrofit natural cotton fibers. Here, the cotton fiber surface was oxidized by sodium periodate with a mist process, then [2-(methacryloyloxy) ethyl] trimethylammonium chloride (DMC) was co -polymerized with hydroxyethyl acrylate (HA) to obtain an antibacterial cationic polymer (DMC- co -HA). The self-synthesized polymer was covalently grafted onto the aldehyde-functionalized cotton fibers via an acetal reaction between hydroxyl groups of the polymer and aldehyde groups of the oxidized cotton surface. Finally, the resulted Janus functionalized cotton fabric (JanCF) revealed robust and persistent antimicrobial activity . The antibacterial test showed that when the molar ratio of DMC/HA was 50: 1, JanCF possessed the best BR (bacterial reduction) values of 100 % against Escherichia coli and Staphylococcus aureus . Furthermore, the BR values could be maintained over 95 % even after the durability test. In addition, JanCF exhibited excellent antifungal activity against Candida albicans . The cytotoxicity assessment confirmed that JanCF exhibited a reliable safety effect on human skin. Particularly, the intrinsic outstanding characteristics (strength, flexibility, etc.) of the cotton fabric were not considerably deteriorated compared to the control samples.
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Acta Biomaterialia
·
2022
·
IF 10.633
Mengying Chen,Huaping Tan,Weijie Xu,Zijia Wang,Jinglei Zhang,Shengke Li,Tianle Zhou,Jianliang li,Xiaohong Niu
Injectable hydrogels based on various functional biocompatible materials have made rapid progress in the field of bone repair . In this study, a self-healing and injectable polysaccharide-based hydrogel was prepared for bone tissue engineering. The hydrogel was made of carboxymethyl chitosan (CMCS) and calcium pre-cross-linked oxidized gellan gum (OGG) cross-linked by the Schiff-base reaction. Meanwhile, magnetic hydroxyapatite/gelatin microspheres (MHGMs) were prepared by the emulsion cross-linking method. The antibacterial drugs, tetracycline hydrochloride (TH) and silver sulfadiazine (AgSD), were embedded into the MHGMs. To improve the mechanical and biological properties of the hydrogels, composite hydrogels were prepared by compounding hydroxyapatite (HAp) and drug-embedded MHGMs. The physical, chemical, mechanical and rheological properties of the composite hydrogels were characterized, as well as in vitro antibacterial tests and biocompatibility assays, respectively. Our results showed that the composite hydrogel with 6% (w/v) HAp and 10 mg/mL MHGMs exhibited good magnetic responsiveness, self-healing and injectability. Compared with the pure hydrogel, the composite hydrogel showed a 38.8% reduction in gelation time (196 to 120 s), a 65.6% decrease in swelling rate (39.4 to 13.6), a 51.9% increase in mass residual after degradation (79.5 to 120.8%), and a 143.7% increase in maximum compressive stress (53.6 to 130.6 KPa). In addition, this composite hydrogel showed good drug retardation properties and antibacterial effects against both S. aureus and E. coli . CCK-8 assay showed that composite hydrogel maintained high cell viability (> 87%) and rapid cell proliferation after 3 days, indicating that this smart hydrogel is expected to be an alternative scaffold for drug delivery and bone regeneration . Statement of significance Biopolymer hydrogels have been considered as the promising materials for the treatment of tissue engineering and drug delivery. Injectable hydrogels with and self-healing properties and responsiveness to external stimuli have been extensively investigated as cell scaffolds and bone defects, due to their diversity and prolonged lifetime. Magnetism has also been involved in biomedical applications and played significant roles in targeted drug delivery and anti-cancer therapy. We speculate that development of dual cross-linked hydrogels basing biopolymers with multi-functionalities, such as injectable, self-healing, magnetic and anti-bacterial properties, would greatly broaden the application for bone tissue regeneration and drug delivery.
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JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Zhenchao Lei,Ziyuan Huang,Yimin Lin,Yuwei Liu,Zhang Yan,Wenxiao Zheng,Huanxin Ma,Zhi Dang,Chunhua Feng
The corrosion of Fe(0) in the presence of O 2 in nature can lead to the oxidation of organic compounds, but the efficiency is very limited. Herein, attempts were made to establish a galvanic system that separates the anodic Fe(0) oxidation reaction and the cathodic O 2 reduction reaction using an air-breathing cathode. Compared with the chemical Fe(0)/O 2 system, it exhibited a substantially higher capability of destroying a variety of pollutants, such as organic dyes (12 types), phenol , nitrobenzene , acetaminophen, phenol, and ethylenediaminetetraacetic acid. The degradation rate constant of a model dye (i.e., Rhodamine B) increased from 0.047 min − 1 (chemical) to 1.412 min −1 (galvanic) under the passive air-breathing condition. The electric circuit design promoted Fe(0) dissolution to Fe(II) and triggered electron transfer that drives O 2 reduction to H 2 O 2 , two important species responsible for the generation of HO • at high abundance. In addition, the galvanic Fe(0)/O 2 system produces electricity while destroying pollutants. Tests with real Ni plating wastewater further demonstrated the capability of the system to oxidize complexed organics and phosphite. This study provides a new strategy for boosting the oxidative capacity of the Fe(0)/O 2 system, which shows promise for acid wastewater treatment .
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Tong Zhou,Jing Zhou,Qian Feng,Quanling Yang,Yongcan Jin,Dagang Li,Zhaoyang Xu,Chuchu Chen
Petroleum-based plastics are useful but they pose a great threat to the environment and human health. It is highly desirable yet challenging to develop sustainable structural materials with excellent mechanical and optical properties for plastic replacement. Here, we report a simple and efficient method to manufacture high-performance all-biobased structural materials from cellulosic wood skeleton (WS) and gelatin via oxidation and densification. Specifically, gelatin was grafted to the oxidized cellulose wood skeletons (DAWS) and then physically crosslinked via Tannic acid (TA), resulting in a significant enhancement of the material properties. Notably, only a mild pressure was applied during the drying process to form a densified TA/Gelatin/transparent wood film(TWF). The developed TA/Gelatin/TWF (thickness:100 ± 12 μm) exhibited a desirable combination of high strength (∼154.59 MPa), light transmittance (86.2 % at 600 nm), low haze (16.7 %), high water stability (wet strength: ∼130.13 MPa) and ultraviolet blocking efficacy which surpass most of the petroleum-based plastics. In addition, due to the all bio-based origins (wood and gelatin), TA/Gelatin/TWF are easily biodegradable under natural conditions, leading to less impact on the environment. These findings would hold promises for exploring high-quality all bio-based wood composites as eco-friendly alternatives to substitute plastics with wide applications, e.g. anti-counterfeiting, UV protection, and flexible electricals.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 141
·期 6
·e54918
·
IF 3
Cuichuan Zhang,Zhiqiang Lu,Shu-Dong Jiang,Jiasheng Qian
Given the environmental benefits, poly(vinylidene fluoride) (PVDF)-based composite powder coating was developed without using any harmful solvent. However, it still remains poor adhesion to substrates and low compatibility to acrylic resin issues. To address these challenges, PVDF was grafted with glycidyl methacrylate (GMA) through a facile and scalable reactive extrusion method. The resulting product, PVDF-g-GMA, was then mixed with different contents of polymethyl methacrylate (PMMA), and the mixing was sprayed onto aluminum substrates. The PVDF-g-GMA/PMMA powder coating shows the excellent adhesion and corrosion resistance, particularly when the PMMA content is 30 wt%, owning to the good compatibility of PVDF-g-GMA and PMMA. This work opens up a new possibilities for the development of advanced composite powder coatings with improved performance characteristics.
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CHEMICAL PAPERS
·
2023
·
IF 2.2
Zhang Lie-yuan,Liu Jie-guang,Han Ying,Zhang Shu-min,Jiang Long-fa,Zhan Chun-rui,Zeng Chen-hui,Wang Wen-jun
An automatic potentiometric setting dynamic pH titration method for the determination of sodium bicarbonate in compositions of smoke-type fireworks was developed. After wetting the sample with 0.1 mL ethanol, added 60 mL of deionized water for dissolution, ultrasound for 10 min, filtered and removed the insoluble matter, and then used a potentiometric titrator to drop 0.1 mol/L of hydrochloric acid. The experimental results showed that the limit of quantitation was 0.1%, the recoveries were 96.1–104.8% and the relative standard deviation was 0.56–3.11% when the sample weigh 0.2 g. The automatic potentiometric setting dynamic pH titration method is simple to operate and can accurately and quickly determine the content of sodium bicarbonate in compositions of smoke-type fireworks.
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JOURNAL OF FOOD PROCESS ENGINEERING
·
2021
·Vol. 44
·期 12
·e13889
·
IF 2.356
Yu Wang,Xing-yi Huang,Joshua Aheto,Yi Ren,Xiaorui Zhang,Li Wang
In this study, a 3 × 3 comprehensive colorimetric sensor array (CSA) was constructed for the quality evaluation of Chinese rice wine based on three different action principles (pH change principle, indicators displacement assay principle, and ethanol fading principle). First, China national standard was used to determine the total acid, reducing sugar, and alcoholic strength of six kinds of rice wine, which forms the basis for the selection of the CSA sensitive points. Then, CSA was combined with pattern recognition technologies to qualitatively distinguish rice wine. The results showed that the when PCs = 3, the linear discriminant analysis model can achieve a recognition rate of 100%, which shows strong prediction ability compared with K -nearest neighbor and back-propagation artificial neural network models. Finally, CSA was combined with partial least squares (PLS) and support vector regression (SVR) to quantitatively analyze the three components in rice wine. The correlation coefficients of the training set and predictions are more than 85% in the SVR model, which is superior to the PLS model. Based on these findings, it is possible to conclude that the CSA can be used to rapidly evaluate the quality of rice wine. Practical Applications Established the 3 × 3 colorimetric sensor array (CSA) for the quality evaluation of Chinese rice wine based on three different action principles (pH change principle, indicators displacement assay principle, and ethanol fading principle). The CSA was combined with pattern recognition technologies to qualitatively distinguish different kinds of rice wine. The performance of linear discriminant analysis shows strong prediction ability compared with K -nearest neighbor and back-propagation artificial neural network. The CSA was combined with partial least squares (PLS) and support vector regression (SVR) to quantitatively analyze the three components in rice wine. The correlation coefficients of the training set and predictions are more than 85% in the SVR model, which is superior to the PLS model.
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Ling Cai,Guangxue Chen,Bin Su,Minghui He
Ultra-tough transparent conductive elastomers (TCEs) with self-healing performance are of great significance for research in the fields of soft robotics, optical display electronics, wearable electronic equipment and human–computer interaction. However, their limitation, such as the desolventizing process, low polymerization rate or balance between toughness and self-healing performance, cause difficulty in manufacturing by the 3D printing technique. Here, we propose a novel preparation strategy for 3D printed TCEs based on the photopolymerization of maleic acid (MA)/choline chloride (ChCl) and acrylamide (AAm)/choline chloride type polymerizable deep eutectic solvents (PDESs). PDES can polymerize into a tough and rich in hydrogen bonds poly(PDES) in a few seconds without solvent evaporation. The printed TCEs with precision of 10 µm have high transparency (95.6%) and stable electrical signals at 50% compression for 10,000 cycles. In addition, efficient self-healing performance due to the dynamic hydrogen bonds of poly(PDES) provides broad application prospects for 3D printed TCEs in long-term pressure-resistant intelligent applications.
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危险品化学品经营许可证（带存储）