European Physical Journal Plus
·
2024
·Vol. 139
·期 1
·1-13
·
IF 2.8
Wang Runda,Jiang Zhongying,Yang Fangyuan,Lei Yiteng,Sheng Jie
This study presents a novel category of tough PS-p(AAm-co-MBAA) double network (DN) hydrogels, synthesized through fully chemically cross-linked methods by introducing polyacrylamide network into hydrophobic polystyrene networks. Herein, we obtain the carboxyl-modified polystyrene (CPS) synthesized by polystyrene (PS) using reversible addition–fragmentation chain transfer (RAFT) polymerization, CPS and 4-arm amine poly(ethylene glycol) (4-arm-PEG-NH 2 ) serve as the first chemical cross-linking, providing a brittle and stiff network that allows energy dissipation. Concurrently, the second chemical cross-linking points, created by acrylamide (AAm) and N,N’-methylenebis(acrylamide) (MBAA), impart a ductile and soft network to enhance stretchability. The optimal tough PS-p(AAm-co-MBAA) DN hydrogel displays remarkable properties, including super stretchability (≈5.9 times), tensile strength (≈0.43 MPa), high toughness (≈1.66 MJ m −3 ), good recoverability property (≈94.6% stiffness recovery and ≈88% toughness recovery without any waiting time), and fatigue resistance. This study introduces a novel approach to design and manufacture tough hydrogels with remarkable overall characteristics by employing the collaborative process of RAFT polymerization. Graphical
研究领域:
材料科学
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高分子化学
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软物质物理
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机械工程
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Shaohua Peng,Wenshuang Xu,Hui Liu
Stimuli-responsive hydrogels could effectively solve the problem that traditional drug carriers were difficult to deliver drug on-demand. However, some shortcomings such as complex preparation, single responsiveness, and narrow application still needed to be urgently overcome. In view of this situation, two kinds of hydrogels were elaborately designed in this work. In the unique ethanol/water mixed solvent , a homogeneous reaction system consisting of methacrylic acid (MAA) and N-isopropylacrylamide (NIPAM) was constructed, and a dual-responsive P(MAA-co-NIPAM) hydrogel was successfully synthesized. A near-infrared (NIR) responsive multi-functional PPy/P(MAA-co-NIPAM) hydrogel was subsequently prepared by the introduction of polypyrrole (PPy) via in-situ polymerization. NIR-responsive swelling, photodeformable, and photothermal ability of the hydrogel under NIR light irradiation were explored. It was found that rapid shape and temperature change could be achieved within 60 s for PPy/P(MAA-co-NIPAM) hydrogel. With doxorubicin as a model drug, the drug loading and in vitro controlled releasing behaviors under different conditions were comprehensively investigated. It was confirmed that the multi-responsive hydrogels had controllable drug releasing ability under different stimulations, which would realize potential targeted drug delivery in physiological environment. This work might provide a new synthetic method of hydrogel for drug releasing, which was expected to expand the potential application domain of hydrogel materials in NIR penetration targeted therapy.
研究领域:
药学
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材料科学
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生物医学工程
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高分子化学
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控制药物递送
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 6
·1-8
·
IF 2.8
Zhang Xiaomin
Flexible sensors for detecting strain have attracted the attention of many researchers. At present, it is an important research direction to prepare conductive hydrogels by adding different metal ions into hydrogels. In this study, a highly extensible and transparent ionic conductive hydrogel was prepared by one-step polymerization. Using sodium chloride as ionic conductive medium, interpenetrating network ionic conductive hydrogels with good flexibility, conductivity, and self-viscosity were constructed. The network is composed of graft copolymer polyacrylamide-acrylic acid (PAMAA) and biomass polymer sodium alginate (SA). Chemical and physical crosslinking have significant tensile properties for hydrogel. Because of the addition of sodium chloride, the hydrogel has excellent electrical conductivity. The SA/PAMAA-GL/NaCl conductive hydrogel can be adhered to different surfaces, such as glass, plastic, iron clip, copper sheet, and skin. The conductive hydrogel can be used as stress sensor, and the sensor is sensitive to the small strain and large strain. This conductive hydrogel has potential application prospects in flexible wearable electronic equipment, motion monitoring, medical rehabilitation, and other fields.
研究领域:
材料科学
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柔性电子学
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传感器与执行器
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生物医学工程
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高分子化学
✓ 已验证
DOI
高影响因子
POLYMER TESTING
·
2022
·
IF 4.931
Yang-he Mo,Hui Wang,Shao-hua Jin,Ke-lin Peng,Zi-ming Yang,Pu-wang Li,Yu Chen
Fast curing hydrogels are highly valuable in the skin care industry. Multi-arm polyethylene glycol (PEG) is a commonly used crosslinking agent for the preparation of fast curing hydrogels. However, the hydrogel preparation using multi-arm PEG crosslinking agents usually requires the end group modifications of reactants, which makes the preparation process complicated and produces hydrogels with low curing rates. In the present study, a fast in situ curing hydrogel, 4-arm-PEG-succinimidyl carbonate/carboxymethyl chitosan (PEG-SC/CMCS), was prepared using 4-arm-PEG-SC as the crosslinking agent and carboxymethyl chitosan (CMCS), a derivative of natural polysaccharide with excellent comprehensive properties, as the framework without any end groups modified. The structure and properties of the prepared hydrogel were characterized by FTIR, XRD, SEM, rheology and swelling kinetics. The effects of reaction conditions on the structure and properties of hydrogel were investigated. The PEG-SC/CMCS hydrogel exhibited pH-sensitive swelling behaviors. Its application potential in skin care products is demonstrated with its excellent sustained-release performance of Vitamin C, a model drug for skin treatment, and high adsorption capacity of heavy metal ions that are easily deposited on skin surface. Our work has provided a new strategy for building multifunctional gel materials for skin care and offered a PEG-SC/CMCS hydrogel with great application potentials.
研究领域:
生物材料
·
高分子化学
·
药剂学
·
皮肤科学
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组织工程
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药物递送系统
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环境毒理学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Xiang Li,Wei Liu,Yan Wang,Linze Lv,Huaiwei Feng,Weibo Huang,Yu Sun,Weixing Xiong,Honghe Zheng
Covalent organic frameworks (COFs) have been widely used in various fields due to their abundant elemental resources, easy structure control, and abundant tunable porous structures. COFs containing electroactive organic groups with reversible redox behavior are potential electrode materials for next-generation high-performance lithium-ion batteries (LIBs). However, the aromatic conjugated structure of the backbone moiety in most reported COFs cannot participate in redox reactions, resulting in low capacity of COFs. At the same time, the synthesis processes of COFs are usually complicated and generally requires high temperature and high pressure. On this basis, an imine bond-rich COF (TAACOF) with reversible Li-ion bonding is developed, which has the advantages of facile preparation and low energy consumption. In particular, the lone pair electrons of the N atom in the imine bond can induce lithium ions to combine with the aromatic conjugated structure, which greatly improves the capacity of the TAACOF electrode. After 800 cycles, the active sites of the TAACOF are fully activated, and after a 14-electron redox reaction, the specific capacity can reach as high as 1035.7 mAh/g.
研究领域:
材料科学
·
电化学
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储能
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有机化学
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纳米技术
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Wen Ren,Di Wu,Yanna NuLi,Xuan Zhang,Jun Yang,Jiulin Wang
The electrolyte based on magnesium bis(diisopropyl)amide (MBA), a low-cost and non-nucleophilic organic magnesium salt, is proposed to be an admirable alternative for rechargeable magnesium batteries but suffers from limited ionic conductivity and an inferior electrochemical window in the commonly used ether solvents. In this work, the 1-butyl-1-methylpiperidinium bis(trifluoromethyl sulfonyl)imide (PP14TFSI) ionic liquid as the cosolvent of tetrahydrofuran (THF) in chlorine-free MBA-based electrolytes has been first demonstrated to remarkably improve the ionic conductivity and broaden the oxidative stable potential (2.2 V vs Mg/Mg2+) on stainless steel. Reversible Mg electrochemical plating/stripping with a low overpotential below 200 mV and ca. 90% Coulombic efficiency are obtained. The current density of Mg plating/stripping is increased 238 times after the addition of PP14TFSI, where the mechanism of competitive coordination of TFSI– making an easier Mg plating/stripping is proposed theoretically. The MBA-2AlF3 electrolyte with a ratio-optimized THF/PP14TFSI cosolvent exhibits good compatibility with the Mo6S8 cathode. Furthermore, the Se@pPAN|Mg full cell exhibits an initial capacity of 447.8 mAh g–1 and as low as ∼0.66% capacity decay per cycle for more than 70 cycles at 0.2 C with the synergy of LiTFSI additives. The facile modification strategy of ionic liquid in the MBA-based electrolyte sheds inspiring light on exploring non-nucleophilic and chlorine-free electrolytes for practical rechargeable magnesium batteries.
研究领域:
材料科学
·
电化学
·
储能技术
·
电池技术
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无机化学
·
物理化学
✓ 已验证
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Hongbo Fang,Liqian Dai,Shuyan Wang,Weiye Shi,Defang Ma
The permanganate/bisulfite (PM/BS) process is highly efficient in the oxidation of refractory contaminants due to the generation of a large number of reactive manganese species and radicals. However, a lot of concerns need to be addressed for the application of the PM/BS process in real sulfamerazine (SMZ) contaminated water treatment. The factors affecting the degradation efficiency of SMZ by PM/BS and the influences of PM/BS pre-oxidation on the formation and toxicity of trihalomethanes (THMs) during the subsequent chlorination of simulated SMZ-contaminated waters were investigated in this study. The PM/BS process exhibited fast oxidation of SMZ at acidic/neutral pH and low SMZ concentration (5 μm) with more than 80% of SMZ removal within 15 s. The permanganate was efficiently activated by bisulfite and exhibited high efficiency in SMZ degradation when permanganate/bisulfite dosage was 50 μm:250 μm. The co-existing protein bovine serum albumin caused less than 10% inhibition of SMZ degradation in the PM/BS process at pH 6 and 7. However, humic acids and alginate inhibited the removal of SMZ by 18%–57%. PM/BS pre-oxidation of SMZ-contaminated waters achieved a 28%–64% reduction of THM formation in the subsequent chlorination, greatly decreasing the toxicity risk in chlorination.
研究领域:
环境科学
·
水处理技术
·
化学氧化
·
高级氧化工艺
·
毒理学
✓ 已验证
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Youning Chen,Shuang Jia,Wei Zhao,Juan Song,Yuhong Li,Huan Wang
A novel ethylenediamine chelating resin (PEDA-g-PS) was prepared by grafting poly (glycidyl methacrylate) onto the chloromethylated polystyrene beads via surface-initiated atom transfer radical polymerization (SI-ATRP), and followed by the ring-opening reaction of epoxy and amine groups. The resin was characterized by infrared spectroscopy, scanning electron microscopy and elemental analysis. The adsorption property for Cu(II) and Cd(II) on the resin was examined. By analyzing adsorption isotherm, adsorption kinetics and the influence of solution pH on the adsorption capacity, the adsorption of Cu(II) and Cd(II) on PEDA-g-PS resin was proved to be Langmuir single-layer adsorption model, and adsorption process conformed to pseudo-second-order kinetic equation. The maximum adsorption capacities for Cu(II) and Cd(II) could reach 1.19 and 1.95 mmol·g –1 at pH 3.0 by fitting Langmuir model. The adsorption of the Cu(II) and Cd(II) was hardly affected by common coexisting ions such as Na (I), K (I), Ca (II) and Mg (II), whereas they were slightly decreased when Fe (II) and Zn (II) coexisted in the solution, which illustrated the selective adsorption of Cu(II) and Cd(II) from wastewater. After ten adsorption–desorption cycles, the adsorption capacity of the resin did not change significantly, indicating that the resin exhibited excellent adsorption properties for heavy metal ions and excellent reusability.
研究领域:
环境科学
·
高分子化学
·
水处理
·
重金属去除
·
吸附技术
✓ 已验证
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2020
·
IF 3.862
Xiang Xu,Junjie He,Yanning Zeng,Caili Yu,Faai Zhang
The surface-initiated metal-free atom transfer radical polymerization (ATRP) solution polymerization of methyl methacrylate was carried out for the first time on the basis of the reductive quenching mechanism. In this study, the 2-bromoisobutyryl bromide (BiBB) was anchored on the surface of self-synthesized rod-like mesoporous material SBA-15 as the initiator, with the commercially available organic dye fluorescein (FL) as photocatalyst and triethylamine (TEA) as electron donor under the irradiation of blue lamp. The obtained composites and polymers were characterized by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, thermogravimetric analysis, N 2 adsorption/desorption measurements, scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and gel permeation chromatography. The results demonstrated that the ordered mesoporous structure of SBA-15 was not disrupted after the polymerization. With an increase in illumination time, the grafting amount and the number average molecular weight of poly(methyl methacrylate) (PMMA) on the surface of SBA-15 linearly increased, and the molecular weight distribution ( Đ ) widened. PMMA with a relatively narrow Đ value was obtained after polymerization for 10 h (1.47). The increase in the grafting amount and molecular weight after chain extension confirmed the chain end functionality of PMMA grafted on SBA-15.
研究领域:
高分子化学
·
材料科学
·
纳米技术
·
表面工程
·
光化学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2013
·Vol. 131
·期 7
·
IF 1.395
Bojian Hu,Xiaoqin Chen,Yan Zuo,Zuliang Liu,Xiaodong Xing
Bi-functional antibacterial material was prepared by co-grafting N -halamine and quaternary ammonium salt monomers from cellulose fiber. The grafted fiber was characterized by Fourier transform infrared spectra, and X-ray photoelectron spectra. The N -halamine derived from the precursor 4-[(acryloxy)methyl]-4-ethyl-2-oxazolidinone via chlorination treatment and the oxidative chlorine (Cl + ) leaching behavior were investigated. The antibacterial activities of singly (only QAs-functionalized or only Cl + -releasing) and dual (QAs-functionalized and Cl + -releasing) functional cellulose fibers were tested against Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus . Compared to singly functionalized formulations, the bi-functional cellulose fiber exhibited excellent and rapid bactericidal performance against both E. coli and S. aureus . © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 40070.
研究领域:
高分子科学
·
材料科学
·
微生物学
·
化学工程
·
生物技术
✓ 已验证
DOI
高影响因子
MICROCHIMICA ACTA
·
2023
·Vol. 190
·期 4
·1-9
·
IF 5.7
Du Ning,Zhang Guohui,Hou Pengkun,Zhang Hao,Guan Ruifang
An organic fluorescent probe, citric acid-1,3-Propanediamine-Rhodamine B ( CPR ) was synthesized to determine pH of ordinary Portland cement requiring only a small sample size (less than 500 μL cement leachate). The SEM, XRD, and FTIR investigations demonstrate that citric acid-1,3-Propanediamine are polymer dots with a fusiform structure. Ratio pH probe is constructed by rhodamine B with polymer dots, which exhibits a linear response in high alkaline range. A 6-fold increase in fluorescence intensity (455 nm) is achieved at pH from 12.00 to 13.25. Combined with measurements of the isothermal calorimeter, mineral composition, and microscopic morphology, variation of pH is used to evaluate the changes of components during hydration. Furthermore, CPR can be applied to measure pH of high-dose pulverized fuel ash blending systems, the non-pure cement with slightly lower alkalinity. Graphical
研究领域:
材料科学
·
分析化学
·
水泥技术
·
荧光探针
·
高分子化学
✓ 已验证
DOI
高影响因子
Frontiers of Chemical Science and Engineering
·
2024
·Vol. 18
·期 4
·1-10
·
IF 4.3
Li Ying,Wang Lu,Xie Junyan,Dai Yong,Gu Xuehong,Wang Xuerui
Membrane gas separation is considered an energy-saving technique to extract He from natural gas due to no phase change and room temperature operation. However, the membrane performance was strongly limited by the trade-off between permeance and selectivity. Herein, novel 4,4′-(hexafluoroisopropylidene)diphthalic anhydride (6FDA)-2,2′-bis(3-amino-4-hydroxyphenyl) hexafluoropropane (APAF)-5-amino-2-(4-aminobenzene) benzimidazole (BIA) asymmetric membranes with a thickness of 300 nm were successfully prepared by the non-solvent induced phase separation method. The membrane performance was modulated by regulating dope solution compositions (e.g., tetrahydrofuran and polymer concentration). The ideal He/CH 4 selectivity was 124 and the optimized He permeance reached 87 GPU, beyond the current upper bound. He/CH 4 selectivity was 75 and He permeance was 73 GPU for the binary mixture feed containing 0.2 mol % He. The membrane showed good resistance to CO 2 and C 2 H 6 , which are the typical impurities in natural gas. The 6FDA-APAF-BIA membranes have good stability (> 160 h), which can provide great potential in He extraction from natural gas.
研究领域:
膜科学
·
气体分离
·
聚合物工程
·
相分离
·
节能分离
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）