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Novel in situ forming, degradable dextran hydrogels by Michael addition chemistry: Synthesis, rheology, and degradation
Various vinyl sulfone functionalized dextrans (dex-VS) (M-n,M-dextran = 14K or 31K) with degrees of substitution (DS) ranging from 2 to 22 were conveniently prepared by a one-pot synthesis procedure at room temperature. This procedure involved reaction of a mercaptoalkanoic acid with an excess amount of divinyl sulfone yielding vinyl sulfone alkanoic acid, followed by conjugation to dextran using ...
http://www.polymer.cn//ss/zhongzhiyuan/publicationsshow_1005.html |
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23. Effect of functionalization of multiwalled nanotubes on the crystallization and hydrolytic degradation of Biodegradable poly(L-lactide). Zhao Y, Qiu Z,* Yang W. Journal of Physical Chemistry B 2008; 112 (51):16461-16468.
Biodegradable poly(L-lactide) (PLLA)/multiwalled carbon nanotubes (MWNTs) nanocomposites were prepared via solution blending using two kinds of MWNTs, i.e., pristine multiwalled carbon nanotubes (p-MWNTs) and carboxyl- functionalized multiwalled carbon nanotubes (f-MWNTs). Various techniques were used to investigate the functionalization of MWNTs on the morphology, crystallization, and hydrolytic ...
http://www.polymer.cn//ss/qiuzhaobin/publicationsshow_745.html |
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66. The photophysical properties and morphology of fluorene-alt-benzene based conjugated polymer. G.Z.Yang, M.Wang, T.X.Liu*. Frontiers of Chemistry in China. 1(2), 130-137, 2006.
A series of fluorene-alt-benzene based conjugated main chain polymers chemically attached with alkyl side chains of different lengths on phenylene rings were designed and synthesized by a palladium catalyzed Suzuki coupling reaction. The UV-vis absorption and fluorescence spectra, thermal stability of spectral property, phase transition behavior and morphology of the synthesized polymers were inve...
http://www.polymer.cn//ss/liutianxi/publicationsshow_469.html |
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北京大学刘忠范院士课题组和彭海琳教授课题组Nature Materials综述：石墨烯制备决定产业化未来
关键字：石墨烯，产业化
过去的十几年石墨烯研究和产业化进步飞速，然而石墨烯产业化仍然面临诸多挑战和问题。面向石墨烯产业化应用的制备技术不是对实验室制备过程的简单放大，规模化制备对制备技术的可重复性、安全性和成本等都提出了更高的要求。尽管从产能上看石墨烯的粉体和薄膜均实现了宏量化制备。然而，石墨烯产品的生长工艺、原材料、设备甚至生产批次的不同，得到的产品质量和性能参差不齐，且很难达到统一的标准。以史为鉴，参考...
http://www.polymer.cn/sci/kjxw15608.html |
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Nature Photonics《自然·光子学》报道黄维院士、安众福教授团队 首例多彩有机“夜明珠”
关键字：长余辉发光材料，有机晶体，多彩长余辉发光
近日，南京工业大学海外人才缓冲基地黄维院士和安众福教授带领的团队在有机长余辉发光领域再次取得重大突破。他们首次实现了单一有机晶体材料下的多彩长余辉发光，同时展现了该类材料在多彩显示、防伪以及可视化紫外光精准探测等领域的应用潜力，相关成果以题为“Colour-tunable ultra-long organic phosphorescence of a single-component molecular crystal”于4月8日在...
http://www.polymer.cn/sci/kjxw15408.html |
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东华大学俞建勇院士、丁彬教授《Nature Communications》：二维网状纳米纤维材料制备技术的最新研究成果
关键字：静电喷网，网状纤维，二维自组装
近日，东华大学纺织科技创新中心俞建勇院士及丁彬教授带领的纳米纤维研究团队在高分子材料成型加工领域取得了重要进展，提出了一种高分子网状纤维材料的新型加工技术——“静电喷网”。该研究以《静电喷网法制备高性能二维自组装纳米网络结构材料》(Direct Electronetting of High-Performance Membranes Based on Self-Assembled 2D Nanoarchitectured Networks)为题发表于Nature子刊《自然·通讯》(Nature C...
http://www.polymer.cn/sci/kjxw15361.html |
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复旦大学武培怡教授和上海大学安泽胜教授《Nature Communications》：聚合诱导自组装领域（PISA）取得重要进展
关键字：嵌段共聚物，PISA，自组装，聚合诱导自组装
近日，复旦大学博士生吕飞在导师武培怡教授和上海大学安泽胜教授共同指导下，在聚合诱导自组装领域（PISA）取得了重要进展，相关研究成果2019年3月27日以“Scalable preparation of alternating block copolymer particles with inverse bicontinuous mesophases”为题发表在《Nature Communications》（10.1038/s41467-019-09324-5）上。
两亲性嵌段共聚物胶体颗粒具有丰富可控的形貌特征，如...
http://www.polymer.cn/sci/kjxw15351.html |
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Novel global-like second-order nonlinear optical dendrimers: convenient synthesis through powerful click chemistry and large NLO effects achieved by using simple azo chromophore
关键字：second-order nonlinear optical dendrimers, click chemistry, azo chromophore
In this paper, global-like dendrimers, G1-TPA, G2-TPA and G3-TPA, bearing 9, 21 and 45 azobenzene chromophore moieties, respectively, were conveniently prepared with high purity and satisfactory yields, through the combination of divergent and convergent approaches, coupled with the utilization of the powerful Sharpless ‘‘click’’ reaction. Due to their perfect 3D structure and the isolation ...
http://www.polymer.cn/research/sy_info17357 |
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New Hyperbranched Polytriazoles Containing Isolation Chromophore Moieties Derived from AB4 Monomers through Click Chemistry underCopper(I) Catalysis: Improved Optical Transparency and Enhanced NLOEffects
关键字：chromophores, click chemistry, hyperbranched polymers, isolation chromophores, nonlinear optics, polymers
By modifying a synthetic procedure, two new hyperbranched polytriazoles (HP1 and HP2) containing isolation chromophores were synthesized successfully through click chemistry reactions under copper(I) catalysis. For the first time, these two polymers were derived from an AB4-type monomer, although they contain different end-capping chromophores. They are soluble in normal polar organic solvents a...
http://www.polymer.cn/research/sy_info17352 |
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Novel global-like second-order nonlinear optical dendrimers: convenient synthesis through powerful click chemistry and large NLO effects achieved by using simple azo chromophore
关键字：second-order nonlinear optical dendrimers, click chemistry, azo chromophore
In this paper, global-like dendrimers, G1-TPA, G2-TPA and G3-TPA, bearing 9, 21 and 45 azobenzene chromophore moieties, respectively, were conveniently prepared with high purity and satisfactory yields, through the combination of divergent and convergent approaches, coupled with the utilization of the powerful Sharpless ‘‘click’’ reaction. Due to their perfect 3D structure and the isolation ...
http://www.polymer.cn/research/sy_info17357 |
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