聚羟基丁酸酯共聚物超薄膜中向日葵晶形成的原子力显微镜观察  被引量:1

AFM Observation of Sunflower-like Crystalline Morphology Formed in Ultra-thin Film of Poly(3-hydroxybutyrate-co-3-hydroxyhexanoate)

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作  者:王震[1] 徐军[1] 谢续明[1] 王秀凤[2] 

机构地区:[1]清华大学化工系高分子研究所 [2]清华大学物理系,北京100084

出  处:《高等学校化学学报》2005年第1期192-194,共3页Chemical Journal of Chinese Universities

基  金:国家自然科学基金(批准号:20174022);国家重大基础研究计划"理论物理学及其交叉科学若干前沿问题"子课题(批准号:90103035);国家自然科学重点基金(批准号:10334020);清华大学分析测试基金资助

摘  要:Poly(3-hydroxybutyrate-co-10%3-hydroxyhexanoate)(PHBHHx) thin films were prepared by means of spin-coating PHBHHx/chloroform solutions on the silicon substrate. The crystalline morphologies of PHBHHx thin films were observed by atomic force microscopy(AFM) at room temperature. A novel crystalline morphology, that is like sunflower was found when the film is very thin and named as sunflower-like crystalline morphology. Compared with usual PHBHHx spherulites, there are obvious differences in aspects of nucleation, crystal growth process and crystalline morphology for the sunflowers. The PHBHHx/chloroform solution properties and the substrate have great effects on the formation of the sunflower. A circular boundary that may result from a liquid-liquid phase separation in PHBHHx solution first formed in the thin film during the spin-coating process, then it induced the formation of the sunflowers.Poly(3-hydroxybutyrate-co-10%3-hydroxyhexanoate)(PHBHHx) thin films were prepared by means of spin-coating PHBHHx/chloroform solutions on the silicon substrate. The crystalline morphologies of PHBHHx thin films were observed by atomic force microscopy(AFM) at room temperature. A novel crystalline morphology, that is like sunflower was found when the film is very thin and named as sunflower-like crystalline morphology. Compared with usual PHBHHx spherulites, there are obvious differences in aspects of nucleation, crystal growth process and crystalline morphology for the sunflowers. The PHBHHx/chloroform solution properties and the substrate have great effects on the formation of the sunflower. A circular boundary that may result from a liquid-liquid phase separation in PHBHHx solution first formed in the thin film during the spin-coating process, then it induced the formation of the sunflowers.

关 键 词:薄膜 向日葵晶形貌 液-液相分离 

分 类 号:O631[理学—高分子化学]

 

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