POLYMER
·
2025
·
IF 4.5
Zhuoxin Wen,Xiaoyue Yang,Meiqi Wang,Jia Yang,Manman Zhao,Zhanxiong Li
In this paper, 2-bromoisobutyryl bromide (BIBB) was used to gain access to the active site of an atom transfer radical polymerization (ATRP) reaction on fiber surface to prepare a Cotton-Br macromolecular initiator. It was then used to trigger the ATRP polymerisation of styrene under the PMDETA/CuBr system. The influence of monomer concentration, bath ratio, and grafting time on the in situ generation of micro- and nanomorphic coatings on fiber surfaces were also investigated. Cotton-PS, a cotton fabric with controllable rough morphology of fiber surface, was obtained through the adjustment of grafting reaction conditions. Energy dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FT-IR) and atomic force microscope (AFM) test proved that grafting reaction was successful. The C-Br on coating surface can condensed with perfluoropolyether carboxylic acid (PFPE-COOH), and the ensuing reaction introduces Diazabicycloundecene (DBU), thereby activating the PFPE-COOH. Under mild reaction conditions, this process produces superhydrophobic cotton fabrics. The effect of different molecular weight PFPE-COOHs on hydrophobicity was also investigated during chemical modification. The contact angle (CA) of modified cotton fabric increased from 144.8 ± 3.6° to 155.2 ± 3.5° after chemical modification with PFPE-COOH, exhibiting superhydrophobicity. The finished fabric showed excellent oil-water separation performance. Subsequent to the completion of 10 cycle tests, its oil-water separation efficiency was maintained at 98.6%.
研究领域:
材料科学
·
高分子化学
·
纺织工程
·
表面改性
·
疏水材料
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产品关联
DOI
高影响因子
Polymer Chemistry
·
2015
·Vol. 6
·期 15
·2837-2843
·
IF 5.52
Yipeng Wei,Pingwei Liu,Wen-Jun Wang,Bo-Geng Li,Shiping Zhu
In emulsion atom transfer radical polymerization (ATRP), escape of catalytic copper ion species from the particle to the aqueous phase represents one of the major challenges which causes uncontrollable polymerization and/or unstable latex. We addressed this issue by employing a functional surfactant–ligand (SL) design as the capture agent (CA), which prevented the copper species from escape in the emulsion ATRP. In this work, emulsion ATRP of methyl methacrylate (MMA) mediated CuCl2/4,4-di(5-nonyl)-2,2′-bipyridine (dNbpy) was carried out with Brij-98 as a surfactant in the presence of a small amount of CA. The CA molecules effectively captured dissociated copper ions inside the particle, thus efficiently decreasing the copper ion concentration in the aqueous phase. Only 3 wt% of surfactant loading (0.6 wt% CA and 2.4 wt% Brij-98 based on MMA) was needed to achieve well-controlled ATRP and to stabilize the emulsion system, which is a significant reduction from a typical 13–18 wt% often used in the studies reported in the literature.
研究领域:
高分子化学
·
材料科学
·
纳米技术
·
胶体与界面科学
·
可控聚合
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DOI
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2019
·
IF 3.074
Xiaoqing Zhao,Na Wang,Hou Chen,Liangjiu Bai,Hui Xu,Wenxiang Wang,Huawei Yang,Donglei Wei,Lixia Yang
In this paper, a functional nanoprobe based on graphene oxide (GO) composites was successfully prepared for detection of mercury ion (Hg(II)) with high sensitivity. GO as a substrate was modified and used for the growth of polymer chains to synthesize polyacrylonitrile-grafted GO (PAN- g -GO) by activator generated by electron transfer atom transfer radical polymerization (AGET ATRP). Under the condition of visible light shines, the PAN- g -GO was further modified to prepare [poly(acrylonitrile- co -vinyl(diphenyl pyridine))]-grafted GO (P(AN- co -PHPY)- g -GO) nanomaterial by one-step synthesis. Finally, P(AN- co -PHPY)- g -GO as a nanoprobe was dropped to the surface of the glassy carbon electrode and assembled to the electrochemical sensor . Moreover, it can effectively improve the enrichment capacity of mercury ions and increase the electron transfer rate on the electrode surface. Differential pulse anodic stripping voltammetry (DPASV) was used to evaluate the electrochemical performance. Under optimum conditions, the response of Hg(II) at this resulting sensor was linear in the range of 2.0 μM~0.1 nM with a detection limit of 0.06 nM. Additionally, this sensor showed excellent reproducibility, selectivity and stability.
研究领域:
纳米技术
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材料科学
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分析化学
·
环境科学
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产品关联
DOI
高影响因子
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
·
2018
·Vol. 56
·期 7
·699-704
·
IF 2.588
Lin Lei,Feifei Li,Haixiu Zhao,Yuntao Wang
We successfully synthesized poly( l -lactide)- b -poly (methyl methacrylate) diblock copolymers at ambient temperature by combining ultraviolet light-induced copper-catalyzed ATRP and organo-catalyzed ring-opening polymerization (ROP) in one-pot. The polymerization processes were carried out by three routes: one-pot simultaneous ATRP and ROP, one-pot sequential ATRP followed by ROP, and one-pot sequential ROP followed by ATRP. The structure of the block copolymers is confirmed by nuclear magnetic resonance and gel permeation chromatography, which suggests that the polymerization method is facile and attractive for preparing block copolymers. © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2018 , 56 , 699–704
研究领域:
高分子科学
·
材料化学
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产品关联
DOI
高影响因子
MATERIALS & DESIGN
·
2023
·
IF 8.4
Susu Huang,Yuelin Fang,Boguang Yang,Prabhleen Kaur,Yanqing Wang,Jicheng Zhang,Qiaoying Hu,Xiaoye Yang,Yabin Zhang,Guangxi Zhai,Lei Ye
Postoperative adhesions are one of the most common complications post intraperitoneal surgery. Even after the adhesiolysis, the recurrence of adhesions is as high as 85%. Although zwitterionic-based materials have been reported for the application, unlike the conventional zwitterionic hydrogel, a series of poly (sulfobetaine methacrylate) grafted dextran derivatives (Dex-g-PSBMA) were synthesized by atom transfer radical polymerization (ATRP) reaction, making it fined controllable copolymer by its living polymerization property. Intriguingly, the Dex-g-PSBMA copolymer can self-assemble into a physical hydrogel under physiological conditions. When injected at the site of the lesions, it can immediately cover the wound area, and as the ion concentration increases, the chemical bonds dissociate and the hydrogel may degrade completely. In the abdominal wall-cecum injury adhesion model in rats, Dex-g-PSBMA hydrogel showed excellent anti-adhesion ability, effectively preventing postoperative abdominal wall-cecum adhesion. The mechanism exploration revealed that Dex-g-PSBMA hydrogel can take an effect on the TGF-β/Smad signaling pathway, which can inhibit the Smad3 and activate the Smad7 pathway, thereby reducing the probability of tissue fibrosis, reducing fibrin deposition, and resisting fibroblast adhesions. In conclusion, these findings demonstrated that this Dex-g-PSBMA physical hydrogel is a promising candidate for completely preventing post-surgical adhesions.
研究领域:
生物医学工程
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材料科学
·
外科研究
·
药剂学
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产品关联
DOI
高影响因子
WOOD SCIENCE AND TECHNOLOGY
·
2021
·Vol. 56
·期 1
·205-218
·
IF 2.506
Zhou Yihang,Wang Kai,Hu Dongbo
Recent studies have discovered that surface-initiated activator regenerated by electron transfer atom transfer radical polymerization (ARGET ATRP) is an effective tool to maintain the dimensions of waterlogged archaeological wood (WAW). However, the polymer distribution behaviors in the WAW and the possible anti-shrinkage mechanism are still unclear and barely discussed. Therefore, experiments with varied conditions were conducted. On the basis of the results, the polymer distribution behaviors in the WAW are deduced to have a close connection to the propagation rate of polymerization. Additionally, the expansion phenomenon when the samples were overtreated and the nearly linear correlation between the weight percentage gains and volume changes suggest expansion stress can be generated during the surface-initiated ARGET ATRP. The residual stress can help counteract the shrinkage stress during the drying process of WAW, which partially accounts for the anti-shrinkage property.
研究领域:
考古学
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材料科学
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高分子化学
·
文物保护科学
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产品关联
DOI
高影响因子
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
·
2015
·Vol. 54
·期 5
·611-620
·
IF 3.113
Zhigang Xue,Zhen Wang,Dan He,Xingping Zhou,Xiaolin Xie
Cationic emulsions of triblock copolymer particles comprising a poly( n -butyl acrylate) (P n BA) central block and polystyrene (PS) outer blocks were synthesized by activator generated by electron transfer (AGET) atom transfer radical polymerization (ATRP). Difunctional ATRP initiator, ethylene bis(2-bromoisobutyrate) (EBBiB), was used as initiator to synthesize the ABA type poly(styrene- b - n -butyl acrylate- b -styrene) (PS-P n BA-PS) triblock copolymer. The effects of ligand and cationic surfactant on polymerizations were also discussed. Gel permeation chromatography (GPC) was used to characterize the molecular weight ( M n ) and molecular weight distribution (MWD) of the resultant triblock copolymers. Particle size and particle size distribution of resulted latexes were characterized by dynamic light scattering (DLS). The resultant latexes showed good colloidal stability with average particle size around 100–300 nm in diameter. Glass transition temperature ( T g ) of copolymers was studied by differential scanning calorimetry (DSC). © 2015 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2016 , 54 , 611–620
研究领域:
高分子化学
·
材料科学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Xiaoguang Qiao,Qianqian Hao,Meng Chen,Ge Shi,Yanjie He,Xinchang Pang
The utilizing light with broadband range has attracted lots of research interest for the photo induced reversible-deactivation radical polymerization (RDRP). However, it is still a challenge for a single catalyst to simultaneously respond to various lights with highly varied wavelengths. Here, we proposed a simple strategy for the preparation of a heterogeneous photocatalyst suitable for photo induced atom transfer radical polymerization (photoATRP) under full spectrum (from UV/vis light to NIR), by combining pyridine nitrogen doped carbon dots (N-CDs) and upconversion nanoparticles (UCNPs). In the presence of these robust UCNP@SiO2@N-CDs composite particles, the photoATRP could be carried on under the different irradiations of UV, blue, green, red, white, and 980 nm NIR light, with a low loading of part per million concentrations of the CuBr2/L catalyst. Moreover, the excellent solvent and aqueous compatibility allow UCNP@SiO2@N-CDs to be capable for photoATRP in both organic solvents and aqueous media, providing well-defined hydrophobic and hydrophilic polymers with low dispersity and excellent chain-end fidelity. In addition, the photoATRP with 980 nm NIR exhibited excellent penetrations through visible-light-proof barriers. The system could be used for the preparation of an injectable hydrogel that had dual curing and photoluminescence modes. Owing to the “living” characteristics of polymer chains achieved through ATRP, the hydrogel was capable to be easily repaired by using monomer as the binder.
研究领域:
材料科学
·
聚合物化学
·
纳米技术
·
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 40
·6529-6538
·
IF 5.342
Xiaoqiang Xue,Yangjing Chen,Kang Liang,Wenyan Huang,Hongjun Yang,Li Jiang,QiMin Jiang,Bibiao Jiang,Hongting Pu
The ring-forming behavior of polymers with an odd number of arms in highly dilute solutions has been studied using tri-arm polystyrene (PSt3) as a model through combining atom transfer radical polymerization (ATRP) and atom transfer radical coupling (ATRC) technologies. The star polymer, PSt3, with three arms and a central core was obtained by ATRP of styrene using a designed initiator with three active Br terminals and ester groups, followed by the Br terminal–Br terminal radical coupling of PSt3, which was implemented via intramolecular ATRC under high dilution conditions. A tadpole-shaped cyclic polymer (tadpole-PSt) was successfully prepared, proving that there no intermolecular side reactions that occur during the intramolecular ATRC of PSt3. Interestingly, the tadpole-PSt not only possesses a cyclic topology, but also contains a living chain, in contrast to other cyclic analogues that have been previously reported. Finally, the tadpole-PSt was used as a building block to construct a type of barbell polymer (barbell-PSt) by removing most of the solvent via vacuum distillation at the end of the intramolecular ATRC of PSt3. Size exclusion chromatography, matrix-assisted laser desorption/ionization time-of-flight mass spectrometry, 1H nuclear magnetic resonance spectroscopy and hydrolysis experiments proved that high-purity cyclic polymers (tadpole-PSt and barbell-PSt) were successfully prepared. The thermal properties of the cyclic and star polymers were analyzed using differential scanning calorimetry and thermogravimetric analysis. The results demonstrated that the formation of a cyclic topology makes a huge contribution to the increase in the glass transition temperature (Tg) and thermal stability of the polymer.
研究领域:
聚合物科学
·
材料科学
·
化学工程
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Ruming Jiang,Meiying Liu,Hongye Huang,Long Huang,Qiang Huang,Yuanqing Wen,Qian-yong Cao,Jianwen Tian,Xiaoyong Zhang,Yen Wei
Hydroxyapatite (HAp), as an important biomaterial for the regeneration and reconstruction of bone tissue, has attracted more and more attention of researchers and scientists due to its unique structure and compositions. However, the preparation of fluorescent HAp with controllable morphology has achieved only limited success. In this work, we reported a novel strategy to construct the water dispersible fluorescent HAp nanorods via the combination of ligand exchange and metal-free atom transfer radical polymerization (ATRP). The Br-containing fluorescent HAp nanorods with controllable size and morphology were first prepared through hydrothermal treatment. A multifunctional organic molecule (named as PTH-Br) with aggregation-induced emission feature was immobilized on the surface of hydrophobic HAp nanorods through ligand exchange reaction. The PTH-Br could be used as the initiator and catalyst for surface-initiated metal-free ATRP using poly(ethylene glycol) methacrylate as monomer to obtain hydrophilic fluorescent HAp polymer nanoparticles. This strategy successfully endowed HAp nanorods excellent fluorescence properties and favorable water dispersibility but well preserved their regular morphology. Biological assays demonstrated that the HAp-PTH-poly(PEGMA) nanoparticles exhibited good biocompatibility and efficient cell uptake performance. Taken together, we have developed a rather facile strategy based on the surface ligand exchange reaction and metal-free photoATRP to fabricate fluorescent HAp with controllable size and morphology, high water dispersibility and biological properties. These HAp-PTH-poly(PEGMA) nanoparticles should be novel and promising candidates for biomedical applications.
研究领域:
材料科学
·
纳米技术
·
生物医学工程
·
生物材料
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产品关联
DOI
高影响因子
Journal of Applied Biomaterials & Functional Materials
·
2018
·
IF 1.397
Xinhua Liu,Yong Li,Zhaoyang Chu,Yinchun Fang,Hongliang Zheng
Introduction:Bacterial cellulose (BC) aerogels have received more and more attention due to their renewability, biodegradability and other excellent properties in recent years. Modification of BC aerogels using different methods would expand their applications. However, many problems exist for these modifications, such as a low grafting ratio, the larger dosage of metal catalyst required and so on. Activator regeneration by electron transfer (ARGET) for atom transfer radical polymerization (ATRP) is a novel ATRP method which could significantly reduce the amount of metal catalyst required and achieve a high grafting ratio.Methods:Novel nanostructured BC aerogels containing epoxy groups were prepared by the ARGET ATRP method. BC aerogels were functionalized with initiating sites by reaction with 2-bromoisobutyryl bromide (BiBBr), and followed by ARGET ATRP reaction with glycidyl methacrylate (GMA) which was catalyzed by copper(II) bromide (CuBr2) and N,N,N',N,'N"-pentamethyldiethylenetriamine (PMDETA), and then reduced by vitamin C. BC aerogels containing epoxy groups (BC-g-PGMA) were obtained after freeze-drying. The influence factors of the solvent ratio of N,N-dimethyl formamide (DMF)/toluene, monomer concentration, the concentration of CuBr2, the molar ratio of vitamin C (Vc)/CuBr2,reaction temperature and time on the grafting ratio were investigated.Results:The results showed that the optimal DMF and toluene volume ratio was 2:1, the optimal monomer and CuBr2 concentration were 2 mol/l and 1.5 mmol/l. The optimal molar ratio of PMDETA/CuBr2 and Vc/CuBr2 were 4:1 and 1:1. The optimal reaction temperature and time were 60°C and 9 h. Scanning electron microscopy (SEM) images showed that GMA was strongly adhered onto the surface and inside of the BC pellicle.Conclusions:GMA was self-grown on the BC surface and achieved the high grafting ratio of 1052.7% under optimal conditions. The BC-g-PGMA aerogels containing the epoxy groups will provide wider application prospects in drug release, enzyme fixed, functional materials and other fields.
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DOI
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 29
·14997-15002
·
IF 3.708
Tian Lan,Wenjie Yang,Hao Huang,Yinghan Wang
Response time, an important property of polymer dispersed liquid crystals (PDLCs), was reported to be affected by the structures of the polymer matrix. In this study, reversible addition fragmentation chain transfer (RAFT) polymerization and atom transfer radical polymerization (ATRP) were used to synthesize a well-defined copolymer matrix. A kind of graft macroinitiator with both controlled main chain and branched chains was employed to prepare PDLCs with a graft copolymer matrix; meanwhile a linear macroinitiator was also synthesized to prepare PDLCs with a linear copolymer matrix. The effect of different matrix structures on response times was investigated. It was found that the introduction of branched chains made a big difference to response times, and a possible mechanism was proposed.
研究领域:
材料科学
·
高分子化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）