INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2022
·
IF 4.326
Yasi Abi,Weiye Li,Zhihong Chang
A new type of humidification membrane for proton exchange membrane fuel cells composed of polyether-block polyamide (PEBAX) 3533, polyacrylic acid (PAA), and cellulose nanocrystals (CNCs) was fabricated using the electrospinning method. CNCs were used to improve the hydrophilicity of the membrane, and PAA was used to improve the spinnability of the material. Using a scanning electron microscope, the morphology of PEBAX/PAA/CNC composite fiber membranes (CFMs) and electrospun fibers was investigated. Through X-ray diffraction analysis and the tests of water vapor permeability, air permeability, and water contact angles, the effects of CNCs on membrane properties were investigated. The results showed that the addition of CNCs improved the hydrophilicity and crystallinity of the CFM; while the air barrier properties of the CFM improved, the water vapor permeability coefficient of the membranes decreased. When the content of CNCs was 4.8 wt %, the vapor/air selectivity reached the highest value of (2.20 ± 0.05) × 104, which was 14% more than that of the fiber membrane without CNCs.
研究领域:
材料科学
·
能源工程
·
燃料电池技术
✓ 已验证
产品关联
DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2015
·Vol. 55
·期 12
·2829-2837
·
IF 1.52
Shushan Yuan,Juan Wang,Xiaojun Wang,Shengru Long,Gang Zhang,Jie Yang
Poly(arylene sulfide sulfone) (PASS) is a kind of newly developed polymeric membrane material which has excellent mechanical strength, thermal stability, and solvent resistance. And, it would be a potential material for high temperature ultrafiltration and organic solvent filtration. In this article, PASS hybrid ultrafiltration membrane with improved antifouling property was prepared by mixing TiO 2 nanoparticles which were grafted with polyacrylic acid (PAA). These membranes were prepared by a phase inversion technique and their separation performance and antifouling property of the prepared membranes were investigated in detail by SEM, FTIR, EDS, contact angle goniometry, filtration experiments of water, and BSA solution. The results shown that the TiO 2 - g -PAA nanoparticles dispersed well in membrane matrix, the hydrophilicity of the membranes prepared within TiO 2 - g -PAA nanoparticles have been improved and these membranes exhibited excellent water flux and antifouling performance in separation than that of the pure PASS membranes and PASS membranes with TiO 2 nanoparticles. More specifically, among membrane sample M0, M1.5, and MP1.5, MP1.5 which contained 1.5 wt% TiO 2 - g -PAA exhibited the highest water permeation (190.4 L/m 2 h at 100 kPa), flux recovery ratio, and the lowest BSA adsorption amount. POLYM. ENG. SCI., 55:2829–2837, 2015. © 2015 Society of Plastics Engineers
研究领域:
材料科学
·
化学工程
·
膜技术
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产品关联
DOI
高影响因子
CATALYSIS TODAY
·
2019
·
IF 4.888
Lina Chi,Yingjia Qian,Junqiu Guo,Xinze Wang,Hamidreza Arandiyan,Zheng Jiang
Membrane fouling due to superhydropobicity of polytetrafluoroethylene ultrafiltration membranes (PTFE UFMs) represents a grand challenge for their practical applications in diverse water treatment industries. Surface immobilisation of hydrophilic and chemically stable inorganic metal oxides (TiO 2 , ZrO 2 , etc) has been developed to improve hydrophilicity of the PTFE UFMs, though they still suffer from expensive and repeating regenerations once fouled. To address such issues, we strive to firmly immobilize g-C 3 N 4 modified TiO 2 (g-C 3 N 4 /TiO 2 , hereafter CNTO) onto PTFE UFM via a facile plasma-enhanced surface graft technique using polyacrylic acid (PAA) as a bridging agent. As reported here, the obtained CNTO/PAA/PTFE UFM shows much smaller surface water contact angle (WCA) of 62.3° than that of bare PTFE UFM(115.8°), leading to enhanced water flux of 830 L m −2 h -1 in the initial ultrafiltration of modelled waste-water containing methylene blue (MB). The CNTO/PAA/PTFE UFM is highly resistant to fouling in the prolonged filtration of 1000 mg/L bovine serum albumin (BSA) solution, while the fouled CNTO/PAA/PTFE UFM is able to regenerate rapidly under either UV or visible-light irradiation. The enhanced performance of the novel CNTO/PAA/PTFE UFM is reasonably attributed to its high wettability and robust photocatalytic activity of the g-C 3 N 4 /TiO 2 coating that follows different self-cleaning mechanisms under UV and visible light irradiations.
研究领域:
环境科学
·
材料科学
·
水处理工程
·
表面化学
✓ 已验证
DOI
高影响因子
iScience
·
2023
·
IF 5.8
Han Wang,Dongtian Miao,Yongjiang Yu,Zhihan Zhang,Youlong Zhu,Qing Wang
Lead (Pb(II)) contamination is common in liquid foods and can result from Pb(II) being present in the raw materials or during handling processes. However, due to the complexity of food matrices, there is limited data available concerning Pb(II) ion removal from food sources. This study focused on fabricating a PVA/PAA/DMTD electrospun nanofibrous membrane (ENFM) to efficiently and selectively remove Pb(II) ions from liquid foods. The PVA/PAA/DMTD ENFM had a maximum adsorption capacity of 138.3 mg/g for Pb(II) ions and demonstrated high selectivity toward the removal of Pb(II) ions. Negative values of the Gibbs free energy (Δ G °) showed that the spontaneous nature of the adsorption process was feasible at different temperatures. Moreover, it successfully removed Pb(II) ions from selected samples of commercially available drinks. Therefore, this adsorbent exhibits significant potential for removing Pb(II) ions from liquid food products, thereby reducing daily dietary exposure to Pb(II).
研究领域:
材料科学
·
环境科学
·
食品科学
✓ 已验证
DOI
PubMed
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2025
·Vol. 36
·期 1
·e70031
·
IF 3.4
Xiaotian Wang,Yeerken Aheyeli-kai,Huakun Ying,Jiangli Lin,Yulu Luo,Hongying Ma,Zhongyang Li,Zhen Su
Triphenylmethane dyes have a wide range of applications in textiles, pharmaceuticals, food, and other fields. Malachite green (MG), fuchsin acid (FA), and crystalline violet (CV) were typical representatives of triphenylmethane dyes, and they are carcinogenic and mutagenic to aquatic organisms and environment. However, they need to be separated and enriched for their accurate quantification due to their low content. Therefore, it is important to develop a rapid and accurate enrichment method to monitor these dyes in aquatic systems for human health. In this paper, a novel QuEChERS adsorbent porous ZIF67/PAA/PES composite microspheres were prepared and applied for the rapid adsorption of triphenylmethane dyes in wastewater and fish samples, which improved the adsorption capacity and the analytical sensitivity of the targets. The experimental results demonstrated that the porous ZIF-67/PAA/PES composite microspheres exhibited excellent selective adsorption capacity of MG, FA, and CV, and after six adsorption–desorption cycles, the material adsorption amount can reach more than 90% of its original adsorption amount in wastewater. In addition, the porous ZIF67/PAA/PES composite microspheres were applied as QuEChERS adsorbents for the enrichment of MG and CV dyes in fish, and the adsorption rates of the dyes were 99.11% and 99.03%, with the RSDs of 1.58% and 1.27%, respectively. The limits of detection were 0.0093 and 0.0127 mg/L for MG and CV. Through the Langmuir adsorption isotherm models to predict the MG, FA, and CV of the maximum adsorption capacity were 5417.3622, 2119.9011, and 1654.1026 mg/g, respectively. Thus, the novel porous ZIF67/PAA/PES composite microspheres are more advantageous as QuEChERS adsorbents for sample pre-treatment and have very important research significance.
研究领域:
环境科学
·
分析化学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Weiming Ji,Huan Fu,Shunni Dong,Shaoxiong Zhu,Wei Fan,Jingjing Nie,Xinghong Zhang,Binyang Du
In this work, we reported the amphiphilic porous polydivinylbenzene-poly(acrylic acid) (PDVB-PAA) Janus nanoparticles (NPs) with a cross-linked hydrophobic porous PDVB framework and a cross-linked hydrophilic porous PAA bulge, which were converted from polystyrene/polydivinylbenzene-poly( tert -butyl acrylate) (PS/PDVB-P t BA) Janus NPs via hydrolysis in dichloromethane . Cl,Br-labeled PS/PDVB-P t BA Janus NPs were designed and synthesized to experimentally verify the formation mechanism of PS/PDVB-P t BA Janus NPs and PDVB-PAA Janus NPs for the first time by combined techniques of TEM, SEM with element mapping and FTIR measurements. By simply varying the feeding amount of crosslinking agent ethylene glycol dimethacrylate (EGDMA) during the polymerization step of t BA, the morphologies of resultant PS/PDVB-P t BA Janus NPs and corresponding PDVB-PAA Janus NPs could be well controlled. It was demonstrated that the obtained amphiphilic porous PDVB-PAA Janus NPs could be applied as carrier materials for simultaneously loading hydrophobic coumarin 153 and hydrophilic rhodamine 6G.
研究领域:
材料科学
·
化学工程
·
药物递送系统
✓ 已验证
DOI
高影响因子
MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2022
·Vol. 223
·期 10
·2100467
·
IF 2.996
Yun Liu,Yongmei Liu,Zhiyun Yang,Xiaoling Chen,Yansheng Zhao
Conductive hydrogels show broad prospects in wearable electronic devices. However, the conductive hydrogel cross-linked only by chemical bonds has the shortcomings of being hard and brittle, easy to break under pressure. In order to solve these problems, the MPASP-PAA/Fe 3+ composite conductive hydrogel is prepared by the method of physical and chemical double crosslinking using modified polyaspartic acid (MPASP) as the chemical crosslinking agent and FeCl 3 as the physical crosslinking agent. Compared with traditional chemical crosslinking agents such as N ′ N -methylene bisacrylamide, the MPASP can not only increase mechanical properties of the conductive hydrogel, but also improve the biodegradability and biocompatibility. At the same time, FeCl 3 as a physical crosslinking agent can also enhance the conductivity and toughness of the conductive hydrogel. When MPASP and Fe 3+ content are 2.5 wt% and 0.75 mol%, respectively, the MPASP-PAA/Fe 3+ composite conductive hydrogel exhibits high conductivity (0.12 S m −1 ), sensitivity (4.93), and stretchability (329%). In addition, its compressive strength is as high as 1081.39 KPa. The flexible strain sensor assembled by the MPASP-PAA/Fe 3+ composite conductive hydrogel can not only monitor human joint movements such as elbow and wrist bending, but also detect subtle vibrations such as vocalization and swallowing.
研究领域:
材料科学
·
生物医学工程
·
柔性电子
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Shuman Li,Ming Han,Hong-Guo Liu
Amphiphilic block copolymers can self-assemble into various aggregates in which functional inorganic nanoparticles and organic chromophores can be incorporated. A variety of fabrication methods have been developed. In this work, the liquid/liquid interface mass transfer-assisted self-assembly method was extended to fabricate composite organized structure of polystyrene-b-polyacrylic acid (PS-b-PAA) with small organic molecules, such as diamines, dopamine and dyes. It was found that long uniform nanowires , hollow spheres and foams were generated when using these organic molecules under different conditions, which correspond to worm-like micelles , vesicles and aggregates of microcapsules, respectively. The length of the nanowires reaches to several tens of micrometers. The influence of the molecular structure of the organic molecules, especially the diamines was investigated and discussed, and the formation mechanism of these aggregates was analyzed. This method may be developed to a facile and useful approach to fabricate functional composite structure of block copolymers and small molecules.
研究领域:
材料科学
·
聚合物化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Wenjia Kong,Qinyan Yue,Yue Gao,Qian Li,Xing Xu,Yan Kong,Baoyu Gao
The sever antibiotics pollution in water environment has been a worldwide concern. In this research, a poly acrylic acid (PAA)/graphitic C 3 N 4 (g-C 3 N 4 ) matrix loaded with zero valent iron (Fe 0 ) was synthesized. The PAA/g-C 3 N 4 -Fe 0 was confirmed to be an efficient photocatalyst for the degradation of sulfadimidine (SM2) under visible light. The dosage of g-C 3 N 4 and Fe 0 were optimized in line with photocatalytic performance. The as-prepared samples were comprehensively characterized through chemical structure, morphology, electrochemical and optical measurements. The photodegradation kinetics under different conditions (e.g. pollutant concentration, pH values, various ionic species and common organic component) were studied. The enhanced photocatalytic activity was due to the improved electron transfer efficiency by the evenly dispersed Fe 0 in PAA/g-C 3 N 4 network. The photodegradation of SM2 was confirmed to be driven by ·O 2 – and ·OH radicals originating from the active components induced by visible light. Based on the above experimental analysis, a possible photodegradation mechanism of PAA/g-C 3 N 4 -Fe 0 photocatalyst was thoroughly elucidated. Besides, the degradation intermediates of sulfadimidine were analyzed by liquid chromatography − mass spectrometer (LC-MS), and possible degradation pathways were proposed in coordination with the calculated results based on Density Functional Theory (DFT). Thus, this study revealed the great prospect of the as-prepared PAA/g-C 3 N 4 -Fe 0 photocatalyst in wastewater remediation.
研究领域:
环境科学
·
材料科学
·
化学工程
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Zhihua Zhang,Xiao Du,Zheng Zhang,Qinglong Luo,Zhonglin Zhang,Jun Li,Xiaogang Hao
Because of its excellent stabilities, polyvinylidene fluoride (PVDF) is commonly employed as a binder in electrode fabrication. However, poor adhesion and hydrophilicity limit its applicability. Herein, PVDF as the hydrophobic framework, polyacrylic acid (PAA), and carboxymethylcellulose lithium (CMCLi) composite binders were cross-linked with phytic acid and Li 1-x Mn 2 O 4 /C were used in the formulation. After 100 electrochemical cycles, the film electrode Li 1-x Mn 2 O 4 /C/PAA- c -CMCLi- b -PVDF exhibits excellent adhesion (0.93 N cm −1 ) and a low capacity fading rate (8.2 %). Furthermore, this film electrode demonstrated a high intercalation capacity (32.14 mg g −1 ), a short intercalation equilibrium time (within 2 h), and a fast Li + intercalation rate, which can be attributed to the synergistic effect of electrolyte permeability enhanced by hydrophilic functional groups (–OH and –COOH), dispersibility of electrode material particles improved by high slurry rheology, and the high transport efficiency of –COOH for Li + . These promising results suggest that this double cross-linked Li 1-x Mn 2 O 4 /C/PAA- c -CMCLi- b -PVDF film electrode is suitable for the selective extraction of Li + .
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
DOI
高影响因子
Polymer Chemistry
·
2018
·Vol. 9
·期 29
·4063-4072
·
IF 4.927
Yan Chen,Yuting Gao,Lucília P. da Silva,Rogério P. Pirraco,Mengdi Ma,Liming Yang,Rui L. Reis,Jie Chen
The aim of this research was to develop thermo- and pH-responsive hydrogels based on H-bonds for the sustained release of the small-molecule model drug Methylene Blue (MB). The thermo- or pH-sensitive triblock copolymer based on PNIPAM or PAA was synthesized by sequential RAFT polymerization and hydrolysis. By tuning the temperature or pH, the copolymer was able to form diverse nanostructures, including core–shell micelles, electronegative or uncharged core–shell structures and 3D networks with the hydrophobic forces of PNIPAM or H-bonds between PAA and PNIPAM. Furthermore, the reversible sol–gel transition of the copolymers was modulated by temperature (∼37 °C), pH (∼5) and concentration (∼7 wt%). The drug release potential was evaluated via in vitro injection of copolymer hydrogels into a simulated human body device. The copolymer hydrogels exhibited a sustained drug release behavior and a low instantaneous drug concentration. The MTT studies revealed that there is no noticeable cytotoxicity of NDB or NDA hydrogels against cells. Thus, the tunable drug release efficiency suggests the possibility of PNIPAM- and PAA-based environment responsive hydrogels being applied as drug carrier systems.
研究领域:
材料科学
·
生物医学工程
·
药剂学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry B
·
2017
·Vol. 5
·期 21
·3919-3926
·
IF 4.543
Yan Xing,Qin Gao,Yanmin Zhang,Le Ma,Kang Yong Loh,Mingli Peng,Chao Chen,Yali Cui
Nanocomposites are emerging complex nanoscale materials composed of different phases that have received considerable attention as a result of their widespread impact on a myriad of fields. Having said this, it is important to recognize that poor colloidal stabilities in physiological media and non-specific interactions with biology are key limitations prohibiting their successful translation into the development of practical technologies with real impact. Herein, PAA coated Au/Fe3O4 composite magnetic nanoparticles (NPs) with monodispersity and high biostability were engineered for the development of a highly sensitive C-reactive protein (CRP) chemiluminescence immunoassay (CLIA), based on the horseradish peroxidase (HRP)–luminol–H2O2 system. In addition, zwitterionic glycerophosphoryl choline (GPC) was employed as a co-blocking agent to reduce the nonspecific adsorption. This assay reports a limit of detection (LOD) of 2.5 pM with high reproducibility verified clinically and demonstrating improved progress towards translation into clinics.
研究领域:
生物医学工程
·
临床诊断
·
纳米材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）