SEPARATION SCIENCE AND TECHNOLOGY
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2015
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IF 1.171
Yuanyuan Xu,Jinming Sun,Hou Chen,Liangjiu Bai,Yating Wang,Lili Yu
Poly(n-butyl methacrylate-co-pentaerythritolriacrylate) (poly(n-BMA-co-PETA)) gel was first synthesized via reversible-deactivation radical polymerization (RDRP) technique with Cu(0)/N,N,N’,N’-tetramethylethylenediamine (TEMED) as catalyst system, 2-cyanoprop-2-yl-1-dithionaphthalate (CPDN) as chain transfer agent, and N,N-dimethylformamide (DMF) as solvent. The results exhibited well-controlled characters of the new RDRP technique. The poly(n-BMA-co-PETA) gel exhibited preferable three-dimensional network cross-linked structure. It possessed high oil absorption capacity and perfect reusability. The maximum oil absorption capacity was 52.6 g/g. The gel may have a number of potential applications in controlling oil pollution. The influence factors on oil absorbency were discussed in detail as well.
研究领域:
高分子化学
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环境功能材料
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溢油污染治理
✓ 已验证
DOI
高影响因子
Polymer Chemistry
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2017
·Vol. 8
·期 24
·3679-3688
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IF 5.375
Donghao Wang,Shutong Guo,Qiang Zhang,Paul Wilson,David M. Haddleton
In this study, we report on the synthesis of thermoresponsive polymers with different microstructures, a precisely tunable lower critical solution temperature (LCST) and terminal catechol anchors by copper(0) mediated living radical polymerization (Cu(0)-LRP). All the Cu(0)-LRP polymerizations were performed directly from the unprotected dopamine-functionalized initiators at ambient temperature or below in aqueous solution with full or close to full conversion obtained in minutes. The resulting polymers exhibited a designed molecular weight (MW), narrow MW distribution and high end-group fidelity capable of in situ block copolymerization. We demonstrate their application toward the surface modification of titanium dioxide nanoparticles by the successful preparation of smart nanocomposites with a self-flocculation effect. A “one-pot” strategy was then developed for the simultaneous polymerization and surface modification to simplify the multi-step purification and immobilization processes. The subsequent degradation of Rhodamine B under the irradiation of simulated solar light proved the potential application of hybrid nanocomposites in water treatment and a switching effect of photocatalytic ability below or above the LCST was also observed.
研究领域:
材料科学
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化学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
MACROMOLECULES
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2022
·
IF 6.057
Zhiqiang Wei,Dong Chen,Xinru Zhang,Li Wang,Wantai Yang
The rational design and precise synthesis of aggregation-induced emission (AIE) active polymers with diverse macromolecular structures are crucial to their applications in various fields. Herein, four tetraphenylethylene (TPE) bromopropionate initiators with the number of initiation sites of n = 1–4 were synthesized for the first time and applied in the Cu(0)-mediated single-electron transfer living radical polymerization (SET-LRP) of methyl acrylate (MA) and tert-butyl acrylate (tBA). Well-controlled polymerization and high chain-end fidelity were confirmed by 1H NMR and GPC. The produced polymers had diverse topology (linear/star) and the location of TPE moiety (chain-end/midchain/core), which were all precisely dictated by initiator structure. The macromolecular structure had a remarkable effect on the AIE properties of TPE-(PMA)n in THF/H2O mixtures and TPE-(PAA)n (obtained after deprotecting tert-butyl groups from TPE-(PtBA)n) in the B-R buffer solutions of different pH values. The fundamental insights gained into the macromolecular structure–AIE property correlation in our work are important for the design of AIE-active polymer-based functional materials.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2023
·
IF 7.7
Xin Liu,Peng Xu,Zhuoyu Yang,Pengfei Zhu,Jingwei Ma,Qiulai He,Baolin Hou
Zero-valent copper (Cu(0))-triggered hydrogen peroxide (Cu(0)/H 2 O 2 ) process was used to eliminate and mineralize contamination, while its oxidation efficacy was limited by the reaction of Cu(I) with O 2 . In this study, ferric ion (Fe(III)) was spiked into the Cu(0)/H 2 O 2 (Fe(III)/Cu(0)/H 2 O 2 ) system, and the degradation rate of paracetamol decreased from 24.9% to 95.4%. In the Fe(III)/Cu(0)/H 2 O 2 system, the reaction of Cu(0) and Cu(I) with Fe(III) expedited the conversion from Fe(III) to Fe(II). The reaction of Cu(I) with O 2 was weakened by the competition reaction between Cu(I) and Fe(III), promoting the generation of reactive oxygen species and increasing the utilization of Cu(0). The main reactive oxygen species for pH 4.0 was •OH and Fe(IV) with the contribution rate of •OH and Fe(IV) being 92.3% and 7.7%, but the dominant reactive oxygen species at pH 3.0 was only •OH in the Fe(III)/Cu(0)/H 2 O 2 process. Especially, the contribution of Fe(IV) rose and the contribution of •OH decreased, when the concentrations of 20–80 μmol/L Fe(III), 0.05–0.3 g/L Cu(0) and 50–300 μmol/L H 2 O 2 incremented. In the Fe(III)/Cu(0)/H 2 O 2 process.After we increased the pH of end solution to 7.0/7.5/8.0 and leaching, the total copper in reaction solution was under 6.4/3.3/1.5 μmol/L. In addition, Ni(II) (57.7%), Fe(II) (100%) and Mn(II) (72.4%) obviously enhanced the degradation of paracetamol in the Cu(0)/H 2 O 2 process.
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2019
·
IF 8.456
Junji Li,Xiao-Yang Tian,Li-Ping Zong,Qiang Zhang,Xue-Ji Zhang,Robert Marks,Serge Cosnier,Dan Shan
Glycopolymers have emerged as powerful and versatile glycan analogues for the investigation of cellular signal transduction. In this study, a layer of the glycopolymer-brush (GlyB) interface was functionalized on the surface of gold substrates. In order to enhance the capability and accessibility of this transducer interface, a combined protocol of copper(0)-mediated living radical polymerization (Cu(0)-LRP) with subsequent “CuAAC” click reaction was utilized to synthesize a set of novel glycopolymer precursors with a tunable scaffold structure and pyranose ligands. The resulting glycopolymer exhibited a fine-tuned molecular weight with a minor dispersity of 1.27. Through surface plasmon resonance (SPR) analysis, various GlyB interfaces exhibiting different saccharide moieties (glucose, mannose, and galactose) were examined to study their adhesion or antiadhesion potential toward three types of proteins, concanavalin A, bovine serum albumin, and peanut agglutinin (PNA). The strong affinity between poly(galactose) and PNA was further employed to construct a proof-of-concept aggregation-mediated sensing system. This minimal naked-eye sensor that consisted of only two substances, namely, gold nanoparticles and glycopolymers, was characterized and tested for its potential in protein quantification.
研究领域:
材料科学
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聚合物化学
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生物技术
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分析化学
✓ 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）