李林
原位研究高分子结晶、相分离、自组装、降解等动态过程;聚合物多孔膜材料的制备和性能研究
个性化签名
- 姓名:李林
- 目前身份:
- 担任导师情况:
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学术头衔:
博士生导师, 国家杰出青年科学基金获得者
- 职称:-
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学科领域:
高分子化学
- 研究兴趣:原位研究高分子结晶、相分离、自组装、降解等动态过程;聚合物多孔膜材料的制备和性能研究
李林(研究员,博士生导师,国家杰出青年基金获得者):1966年3月出生。1987年毕业于大连理工大学化工学院,并于同年到中国科学院长春应用化学研究所攻读硕士。1990年8月硕士毕业后,到中国科学院大连化学与物理研究所从事高分子气体分离膜材料的研制工作。1996年3月赴香港科技大学化工系攻读博士学位,导师为Chi-Ming Chen教授,并于1999年12月学成毕业。2000年5月被中国科学院化学院所聘为研究员,2001年5月被聘为博士生导师。2003年获国家自然科学基金委杰出青年基金支持。目前主要研究方向为:原位研究高分子结晶、相分离、自组装、降解等动态过程;聚合物多孔膜材料的制备和性能研究。特别是在原位研究高分子结晶过程方面的研究结果在 Macromolecules刊物上陆续发表后,引起了国际学术界的高度重视和兴趣,Science杂志于2001年2月在“编辑的选择”(Editor’s Choice) 专栏中作为最新文献亮点加以介绍。已获中国发明专利多项,在国际学术刊物如“J. Am. Chem. Soc.”,“Macromolecules”, 和“Langmuir”等杂志上发表论文多篇。
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184
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成果数
5
李林, Lin Li, Chi-Ming Chan, Jian-Xiong Li, Kai-Mo Ng, King-Lun Yeung, Lu-Tao Weng
Macromolecules 1999, 32, 8240-8242,-0001,():
-1年11月30日
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【期刊论文】Direct Observation of the Growth of Lamellae and Spherulites by AFM
李林, Chi-Ming Chan, Lin Li
Adv Polym Sci (2005),-0001,():
-1年11月30日
This article describes some of the progress made in the understanding of the growth of polymer lamellae and spherulites using atomic force microscopy (AFM) in the last five years. High-resolution and real-time AFM phase imaging enables us to observe the detailed growth process of lamellae. During the early stage of crystallization, embryos appear and disappear on the film surface. A stable embryo develops into a single lamella, which develops into a founding lamella. Then, the founding lamella develops into a lamellar sheaf through branching and splaying. Through further branching and splaying, a lamellar sheaf develops into a spherulite with two eyes at its center.
Atomic force microscopy, Branching, Crystallization, Embryo, Lamella, Polymer, Spherulite
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李林, Yong Jiang, Da-Dong Yan, Xia Gao, Charles C. Han, Xi-Gao Jin, Lin Li, Yong Wang, Chi-Ming Chan
Macromolecules 2003, 36, 3652-3655,-0001,():
-1年11月30日
Thin films of poly(bisphenol A-co-decane) (BA-C10) were isothermally crystallized at different temperatures. The lamellar structures and branching during crystallization were observed in real time at different temperatures by an atomic force microscope equipped with a high-temperature heater accessory. Our observations indicated that induced nuclei developed into subsidiary lamellae, forming lamellar branches. Lamellar branches occurred randomly on the parent lamellae at high degrees of supercooling. However, lamellar branches were seldom observed at crystallization temperatures near the melting point. The minimum induction time for induced nucleation was found to occur at around 55℃.
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【期刊论文】Direct Observation of Growth of Lamellae and Spherulites of a Semicrystalline Polymer by AFM
李林, Lin Li, Chi-Ming Chan, King Lun Yeung, Jian-Xiong Li, Kai-Mo Ng, Yuguo Lei
Macromolecules 2001, 34, 316-325,-0001,():
-1年11月30日
The dynamic growth processes of lamellae and spherulites of a polymer (BA-C8) synthesized by condensation polymerization of bisphenol A and 1,8-dibromooctane were directly observed using an atomic force microscope at 25±1℃. The phase shift measured at the tip of growing lamellae is lower than the phase shifts of the other regions of the lamellae. This result indicates that the growth front of a lamella is softer and contains more defects than the developed ones. The growth process of lamellae and the formation of spherulites were studied. A lamella was observed to breed more lamellae by inducing adjacent secondary nuclei and to develop into a lamellar sheaf and finally into a spherulite. The lamellae were preferentially oriented edge-on with respect to the surface of the BA-C8 polymer thin films. The detailed observations on the formation of the secondary nuclei indicated that the branching of the lamellae was only a temporary growth stage of the secondary lamellae. At the branch point, the secondary lamellae could propagate in both backward and forward directions with respect to the growth direction of the parent lamellae.
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李林, Yan-Hong Luo, Hong-Wei Liu, Fu Xi, Lin Li, Xi-Gao Jin, Charles C. Han, Chi-Ming Chan
J. AM. CHEM. SOC. 2003, 125, 6447-6451,-0001,():
-1年11月30日
Poly(para-phenylene vinylene) with crown ether substituents (C-PPV) could form nanoribbons through supramolecular assembly with K+ in dilute chloroform solution. The length of the nanoribbons increased with an increase in the standing time of the C-PPV/K+ solution. Experimental evidence to support the interaction between K+ and crown ether substituents was provided, and the growth mechanism of C-PPV/K+ nanorods to nanoribbons was proposed. The influence of the length of the nanoribbons on the photophysics of C-PPV was also investigated.
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