APPLIED SURFACE SCIENCE
·
2016
·
IF 3.15
Yu Han,Shuijun Song,Yin Lu,Dongfa Zhu
The hydrophilic modification of a polyvinylidene fluoride (PVDF) microfiltration membrane via pretreatment with argon plasma and direct surface-initiated atom transfer radical polymerization (ATRP) was studied. Both modified and unmodified PVDF membranes were characterized by Fourier transform infrared spectroscopy (FTIR), water contact angle, scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and pore size distribution measurements. FTIR and XPS spectra confirmed that sulfobetaine methacrylate (SBMA) had been grafted onto the membrane surface. The initial contact angle decreased from 87.0° to 29.8° and a water drop penetrated into the modified membrane completely in 8 s. The pore size distribution of the modified membrane exhibited a smaller mean value than that of the original membrane. The antifouling properties of the modified PVDF membrane were evaluated by a filtration test using bovine serum albumin (BSA) solution. The results showed that the initial flux of the modified membrane increased from 2140.1 L/m 2 h to 2812.7 L/m 2 h and the equilibrium flux of BSA solution increased from 31 L/m 2 h to 53 L/m 2 h.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
Polymer Chemistry
·
2013
·Vol. 5
·期 2
·638-645
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IF 5.231
Weiwei He,Liang Cheng,Lifen Zhang,Zhuang Liu,Zhenping Cheng,Xiulin Zhu
In this work, iron-catalyzed atom transfer radical polymerization with activators generated by electron transfer (AGET ATRP) of poly(ethylene glycol) monomethyl ether methacrylate (PEGMA) and 2-((ethoxycarbonothioyl)thio)ethyl methacrylate (ETCEMA) followed by reduction were performed to modify Fe3O4@SiO2 nanoparticles (NPs) for introducing thiol groups on the surface of the NPs. Gold NPs and two near infra-red (NIR) organic dyes with different quantum yields were covalently fixed into the polymer shells independently to afford magnetic NPs with surface-enhanced Raman spectroscopy (SERS), NIR fluorescence imaging and photo-thermal therapy (PTT) functionalities, respectively. In addition, all of these NPs are able to display as contrast agents for magnetic resonance imaging (MRI) because of the existence of the paramagnetic Fe3O4 cores.
研究领域:
材料科学
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生物医学工程
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化学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2014
·
IF 3.065
YiLin Wu,MinJia Meng,Xinlin Liu,Chunxiang Li,Min Zhang,Yanjun Ji,Fengquan Sun,Zhihui He,YongSheng Yan
Highly selective molecularly imprinted membranes (MIMs) for artemisinin (Ars) were synthesized by Atom Transfer Radical Polymerization using Activators Generated by Electron Transfer (AGET-ATRP) on the poly(vinylidene fluoride) (PVDF) micro-filtration membrane. The resulting membranes were characterized by ATR-FTIR and SEM. Batch rebinding studies were conducted to determine the adsorption equilibrium, kinetics and selective permeation performance. The estimated adsorption capacity of MIMs toward Ars by the Langmuir isotherm model was 3.46 mg g −1 at 25 °C. The kinetic property of MIMs was well-described by the pseudo-second-order rate equation. The results of selective recognition experiments demonstrated outstanding affinity and selectivity toward Ars over competitive antibiotics (artemether). The selective permeation experiments were investigated to prove the excellent selective permeation performance of MIMs. The reusability of MIMs showed no obviously deterioration at least five repeated cycles in performance.
研究领域:
化学工程
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药物化学
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材料科学
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产品关联
DOI
高影响因子
POLYMER
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2015
·
IF 3.562
Min Li,Chao Liu,Chun-Yan Hong,Cai-Yuan Pan
Graft copolymers with pendant macrocycles were synthesized via “graft onto” method. First, cyclic polystyrene (PS) was achieved by the combination of atom transfer radical polymerization (ATRP) and Cu-catalyzed azide–alkyne cycloaddition (CuAAc), and then an alkynyl group was introduced to cyclic PS. Meanwhile, poly(3-azide-2-hydroxypropyl methacrylate) (PGMA-N 3 ) was synthesized by ATRP of glycidyl methacrylate (GMA) and successive ring-opening of pendant epoxide ring with NaN 3 . The graft copolymer was achieved by the following click reaction between PGMA-N 3 and alkynyl-containing cyclic PS. GPC and 1 H NMR were utilized to characterize the obtained graft copolymers, and a maximal grafting density of 20% was observed. Thermal behaviors of linear PS, cyclic PS and PGMA grafted with cyclic PS (PGMA-g-cPS) were investigated by differential scanning calorimeter (DSC), and T g of PGMA-g-cPS is higher than those of linear and cyclic PS.
研究领域:
高分子化学
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材料科学
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产品关联
DOI
高影响因子
RSC Advances
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2015
·Vol. 5
·期 76
·62024-62032
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IF 3.84
Qian Feng,Dongyan Tang,Haitao Lv,Weile Zhang,Wenbo Li
Well fabricated ZnO nanorods (ZnO NRs) arrays with preferred-orientation that grown on pre-deposited ZnO seed layers substrate were selected to graft thermo-responsive polymers of poly(N-isopropylacrylamide) (PNIPAM) by surface-initiated atom transfer radical polymerization (SI-ATRP). As a controlled/“living” radical polymerization, SI-ATRP could endow the systems with the characteristics of the grafted PNIPAM, meanwhile, with the maintaining of the properties of the ZnO NRs. The structures of ZnO and the grafted polymer with the relatively high molecular weights (Mn, 24 300) and narrow molecular weight distributions (Mw/Mn, 1.19) that determined by GPC detection, were characterized by XRD and FT-IR. The graft amount of PNIPAM on ZnO NRs and the interactions between the two components were determined by TG and XPS, respectively. The relatively thin layers of PNIPAM (∼15 nm) formed around NRs via SI-ATRP method were observed by SEM. And the temperature-sensitivity of the grafted nanorods were proved by contact angles measurements. Furthermore, photodegradation of Rhodamine B (Rh-B) by the grafted nanorods revealed that ZnO NRs–PNIPAM exhibited photocatalysis and temperature responsibility characteristics, indicating the significant potential applications with tunable responsiveness by changing the environmental conditions.
研究领域:
材料科学
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高分子化学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2015
·Vol. 3
·期 39
·7698-7706
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IF 4.726
Jinhong Jiang,Peibin Zhang,Liping Zhu,Baoku Zhu,Youyi Xu
The present work aims to improve the antifouling properties and hemocompatibility of poly(vinylidene fluoride) (PVDF) membranes by polydopamine-mediated atom transfer radical polymerization (ATRP). Polydopamine (PDA) was first prepared by the oxidation and self-polymerization in basic aqueous solution. The obtained PDA was used as an additive in the preparation of PVDF membranes via non-solvent induced phase separation (NIPS). Then poly(sulfobetaine methacrylate) (PSBMA), a commonly used zwitterionic polymer, was successfully grafted from the entrapped PDA in membranes through ATRP. The changes in surface morphologies of the PVDF membranes before and after modification were observed by scanning electronic microscopy (SEM) and atomic force microscopy (AFM). Data of water contact angle measurements indicated that the surface hydrophilicity of the modified membranes was remarkably improved compared with that of the pure PVDF membrane. Results of filtration tests revealed that the water permeability and antifouling properties of the PVDF membranes were both increased after modification. Moreover, the hemocompatibility of the modified PVDF membrane was greatly improved due to the incorporation of zwitterionic brushes as demonstrated by in vitro platelet adhesion. Owing to the chemical reactivity of polydopamine as well as its strong interactions with a wide spectrum of solid substrates, this strategy can be extended to other materials and allows the development of novel functional membranes through such a blending process and secondary treatments.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
Polymer Chemistry
·
2020
·Vol. 11
·期 12
·2222-2229
·
IF 5.342
Mengmeng Li,Sixuan Wang,Feifei Li,Lin Zhou,Lin Lei
Triarylsulfonium hexafluorophosphate salt (THS), an organic and inexpensive compound, was employed as a photocatalyst for atom transfer radical polymerization (ATRP) of methacrylate monomers. The propagation of polymerization did not take place without irradiation, meaning that the system can be controlled by switching light “on” and “off”. We demonstrated that the polymerization rate could be significantly increased by adding sodium hydroxide (NaOH) powder into the reaction solution. Furthermore, the obtained poly(methyl methacrylate) (PMMA) presented a targeted molecular weight (Mn), narrow polydispersity indices (PDI = 1.26–1.32) and fairly high conversions in different organic solvents. Well-defined block copolymers were obtained by chain extension polymerization. A polymer brush was successfully prepared on a silicon wafer by surface-initiated ATRP using THS as a photocatalyst. This THS catalyzed ATRP system is attractive for a wide range of monomers and no metal residue was found in polymers. The obtained polymers may be useful in the synthesis of pharmaceuticals, foodstuff, and biomedical and antibacterial materials.
研究领域:
高分子化学
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材料科学
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产品关联
DOI
高影响因子
Materials Today Communications
·
2020
·
IF 2.678
Lili Wang,Panpan Hao,Xiaomeng Chu,Yujuan Sun,Xuteng Xing,Shaojie Liu,Erjun Tang,Xiaodong Xu
With 2,2,6,6-tetramethylpiperidin-4-yl methacrylate (TMPM) and styrene (St) as monomers, the block copolymer brush of PS-PSt-PTMPM was grafted on micro-sized polystyrene microsphere via the electron transfer regenerated catalyst atom transfer radical polymerization (ARGET ATRP). The piperidine groups of PTMPM block were then oxidized to nitroxide radicals by 3-chlorobenzoic acid and PSt block was sulfonated with sulfuric acid to give the dual-functionalized block copolymer brush of PS-PSH-PTMA containing both nitroxide radicals and sulfonic acid groups. PS-PSH-PTMA was used for the direct esterification of methacrylic acid (MAA) and methoxy poly(ethylene glycol) (MPEG) for synthesis of methoxy poly(ethylene glycol) methyl acrylates (MPEGMA) instead of free acid catalyst of p-toluene sulfonic acid and free inhibitor of 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO), since the immobilized TEMPO units prevented the undesired radical self-polymerisation and the immobilized sulfonic acid residues catalyzed the esterification. The results showed that the esterification rate of MPEGMA with PS-PSH-PTMA as catalyst and inhibitor was over 99% and the reaction rate was twice as high as that with p-toluene sulfonic acid as catalyst and TEMPO as inhibitor. Furthermore, PS-PSH-PTMA could be easily recovered by filtration and the recycling performance was excellent.
研究领域:
高分子化学
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催化化学
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材料科学
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产品关联
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2020
·
IF 3.862
Xiuzhe Yin,Linan Wang,Xiaomeng Zhang,Haitao Zhao,Zhe Cui,Peng Fu,Minying Liu,Xinchang Pang,Xiaoguang Qiao
Photo-induced metal free ATRP method was employed for the synthesis of star-shaped polymers. By using 21-Br-β-CD as the macroinitiator, 10-phenylphenothiazine as the photoredox catalyst, star-shaped PtBA homopolymers were synthesized. The photo-induced ATRP displayed all the characteristics of controlled/living polymerization systems and the good light control over the polymerization process. The successful chain extension with MMA demonstrated the high livingness of PtBA “arms” and good controllability of the Photo-induced metal free ATRP. Finally, the achieved PtBA-b-PMMA star-shaped copolymers were used as templates for the preparation of precisely size-tunable CdSe quantum dots after a simple hydrolyzing process.
研究领域:
高分子化学
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纳米医学
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药物递送
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生物材料
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胶体与界面科学
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2026
·
IF 8.3
Shijin Zhou,Nan Ma,Baolin Huang,Qian Yang,Jinming Kong,Xueji Zhang
An ultrasensitive electrochemical biosensor has been developed for the detection of miRNA-320b, an exosomal RNA biomarker associated with lymph node metastasis in esophageal squamous cell carcinoma (ESCC). The platform employs a molybdenum-catalyzed atom transfer radical polymerization (Mo-ATRP) signal amplification strategy, eliminating the need for enzymatic or thermal amplification and enabling cost-effective, early-stage cancer diagnostics. A thiolated peptide nucleic acid (PNA) probe is immobilized on a gold electrode to specifically capture miRNA-320b. Upon hybridization, a sodium molybdate (Na 2 MoO 4 )-catalyzed ATRP reaction, initiated by tetrahydrocurcumin (THC), drives the in situ polymerization of 4-methacryloyloxy-2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) monomers, forming redox-active polymer brushes directly on the electrode surface. The electrochemical response is exclusively derived from the surface-confined poly(TEMPO) layer, which forms only upon successful target recognition, ensuring high signal-to-noise performance. The biosensor achieves a detection limit of 0.417 fM with a linear range spanning 1 × 10 −15 to 1 × 10 −10 M ( R 2 = 0.992) and demonstrates excellent selectivity and robustness in complex biological matrices. Its resistance to common interferents and consistent performance under real-sample conditions underscore its suitability for clinical translation. This Mo-ATRP-based highly sensitive approach provides a promising foundation for non-invasive liquid biopsy and early detection of aggressive cancers such as ESCC.
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DOI
高影响因子
Nature Protocols
·
2025
·
IF 16
Luo Xiongfei,Liu Xue,Guo Hongda,Li Ruiping,Wang Min,Li Xiaotong,Li Shujun,Liu Shouxin,Li Jian,Strehmel Veronika,Wang Qunying,Yilmaz Gorkem,Matyjaszewski Krzysztof,Strehmel Bernd,Chen Zhijun
In recent years, there has been increasing interest in using carbon nanodots (CDs) as a component photoinitiator to initiate photopolymerization. These systems support conventional radical photopolymerization and light-mediated atom transfer radical polymerization (photo-ATRP), emphasizing single-component (Type I initiators) and multicomponent systems, which involve at least two reaction partners, specifically, the Type II CD initiator. The latter can function in both photoinduced conventional radical polymerization and photo-ATRP. CDs provide an important advantage by reducing toxicological concerns, as they are nontoxic to cells, and minimizing migration issues typically associated with molecular systems. Here we present two novel photopolymerization methods utilizing biomass-derived CDs as light-sensitive components. The first approach uses biobased furfural to create a Type I CD initiator for photoinduced uncontrolled radical polymerization, which initiates polymerization via homolytic bond cleavage of oxime ester groups attached to the CD surface. The second method employs sodium alginate to generate CDs capable of initiating photoinduced radical polymerization or activating alkyl halides in photo-ATRP processes. Key topics covered in these methods include (1) preparation and characterization of biomass-derived CDs; (2) experimental procedures for CD-assisted photo-induced conventional radical polymerization and photo-ATRP and (3) analysis of the resulting polymers. Preparing and characterizing the CDs takes ~4 d, while photochemical reactions can be conducted within 1 h, depending on requirements. Product separation and analysis take an additional 0.5 h. This protocol is designed for users with experience in polymer chemistry and CD handling.
研究领域:
高分子化学
·
纳米材料
·
光引发
·
绿色化学
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材料科学
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产品关联
DOI
PubMed
高影响因子
POLYMER
·
2016
·
IF 3.586
Yipeng Wei,Qi Zhang,Wen-Jun Wang,Bo-Geng Li,Shiping Zhu
Copper contamination results in poor stability and limited application of latexes generated using emulsion ATRP . This work describes an electrolysis method, which provides for the removal of copper from such latexes, while preserving colloidal stability and latex particle integrity. Polyacrylate latexes were synthesized via emulsion polymerization with reverse ATRP . The reaction was mediated by CuCl 2 /4,4-di-(5-nonyl)-2,2′-bipyridine (dNbpy) and stabilized with a combined surfactant system of Brij-98 and a new surfactant-ligand (SL) design, which provides for the capture Cu species residing at the interface of latex particles. It is shown that >98% of the residual Cu was removed after 14-h of electrolysis at a voltage of 3 V, and >99% Cu removal was achieved after 7-h treatment at 9 V. For comparison, a Cu removal of <50% was measured in polyacrylate latexes prepared by emulsion ATRP using dNbpy as a sole ligand. The removal of Cu using this process is shown to be rapid and efficient and provide for a substantial increase in latex stability and weather resistance of polymers.
研究领域:
高分子化学
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乳液聚合
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可控自由基聚合
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胶体与界面科学
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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）