Materials Science & Engineering C-Materials for Biological Applications
·
2017
·
IF 4.164
Zhijia Zhang,Xiaole Zhao,Yingchun Su,Defeng Xing,Xiaojun Han
We demonstrate that antibacterial agent N , N′ -[(4, 5-dihydroxy-1, 2-phenylene)bis(methylene)]bisacrylamide (OHABA) can be assembled on the surface of vinyl organosilicon nanospheres (VOSNs) by atom transfer radical polymerization (ATRP). Chemically cross-linked vinyl organosilicon cores were facilely fabricated by sol-gel method as support, which densely grafted poly-OHABA (POHABA) as shells. Antibacterial assessment test results revealed that POHABA-based core@shell structure displayed high antibacterial performance, long-term stability, and kept broad-spectrum antibacterial effect of against Gram-negative and Gram-positive bacteria.
研究领域:
材料科学
·
纳米医学
·
抗菌材料
·
高分子化学
·
表面功能化
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Deshan Cheng,Mantang He,Wenbin Li,Jihong Wu,Jianhua Ran,Guangming Cai,Xin Wang
Growing of ZnO nanoparticles on PET films without crystal seeding has been achieved by employing polydopamine as the anchor. The PDA layer was formed on the surface of PET film by the polymerization of dopamine. The PDA-PET was dipped into zinc precursors for hydrothermal growth of ZnO nanoparticles. Cluster-like ZnO nanoparticles were obtained and the special structure was affected by the growing time and zinc ion concentration. The surface morphology, structure and properties were characterized, and the functions including antimicrobial activity and UV protection of the ZnO-coated PET film were investigated. The developed facile hydrothermal approach without seeding will benefit the development of UV resistant and antimicrobial PET films.
研究领域:
材料科学
·
纳米技术
·
表面功能化
·
生物医用材料
·
高分子材料
✓ 已验证
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 89
·72444-72452
·
IF 3.84
Hui Liu,Si Chen,Huanqing Cui,Jin Hu,Hongyan Cai,Wenkai Deng
The uniformly dispersed and structured silica nanoparticles were prepared and functionalized by amino and 2-bromoisobutyrate successively. The random copolymer brushes of 2-(dimethylamino) ethyl methacrylate (DMAEMA) and 1′-(2-acryloxyethyl)-3′,3′-dimethyl-6-nitrospiro-(2H-1-benzopyran-2,2′-indoline) (SPMA) were synthesized from 2-bromoisobutyrate-functionalized silica nanoparticles by surface-initiated atom transfer radical polymerization (SI-ATRP). FT-IR, TGA, XPS, TEM, and EDS verified the successful immobilization of initiator and grafting of the random copolymer. Subsequently, the triple responsive behaviors including thermo-, pH- and photo-sensitivities were investigated using dynamic light scattering (DLS) as well as UV-Vis spectrometry. Furthermore, the active palladium was loaded into the hybrid silica nanoparticles and the catalytic performance was evaluated using a styrene hydrogenation reaction at different temperatures.
研究领域:
高分子化学
·
纳米材料科学
·
催化化学
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智能响应材料
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表面功能化
·
有机合成
✓ 已验证
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2014
·
IF 8.535
Weifei Li,Xuan Liu,Guangyue Qian,Jianping Deng
The present study originally created a methodology for immobilizing polymeric nanoparticles on graphene oxide (GO) by chemical bonds, aiming at chiral functionalization of GO and simultaneously improving the dispersibility of polymer nanoparticles. To prepare the novel GO hybrids, GO was first prepared and alkynylated to form an actual comonomer (MGO), in the presence of which acetylenic monomer (M1) underwent emulsion polymerization in aqueous media with sodium dodecyl sulfate as emulsifier and (nbd)Rh+B–(C6H5)4 as catalyst. SEM and HRTEM images ascertained the formation of polymeric nanoparticles immobilized on GO (NPpoly1/GO). CD and UV–vis absorption spectra demonstrated the optical activity of NPpoly1/GO, originated from the chiral helical conformations adopted by the polymer chains constructing the nanoparticles. FT-IR, Raman, XPS, XRD, and TGA techniques were also utilized to characterize the GO hybrids. The as-obtained NPpoly1/GO was further used as a chiral additive to perform enantioselective crystallization of l-alanine from racemic alanine. l-Alanine was preferentially induced to crystallize rod-like crystals, according to SEM, CD, and XRD characterizations. The present study provides a versatile platform for preparing GO-derived functional materials, particularly novel chiral materials.
研究领域:
材料科学
·
高分子化学
·
纳米技术
·
手性化学
·
表面功能化
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）