Core/Shell and Hollow Polymeric Capsules Prepared from Calcium Carbonate Whisker
Core/Shell and Hollow Polymeric Capsules Prepared from Calcium Carbonate Whisker
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碳酸钙晶须制备的核/壳和空心聚合物胶囊
DOI：
10.1295/polymj.37.434
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发表时间：
2005
期刊：
影响因子：
2.8
通讯作者：
K. Sakurai
中科院分区：
文献类型：
--
作者：
Takashi Sasaki;Takayuki Kitagawa;Shintaro Sato;S. Irie;K. Sakurai
通过乳液聚合将聚甲基丙烯酸甲酯或聚苯乙烯薄层沉积到碳酸钙晶须的表面上制备棒状聚合物胶囊。通过将核材料溶解在盐酸溶液中，也将获得的核/壳胶囊转变成空心胶囊。外壳（聚合物层）的平均厚度范围为29至72纳米。核/壳和空心胶囊的外壳的玻璃化转变温度 Tg 几乎与本体的玻璃化转变温度相同，与超薄聚合物薄膜的结果形成鲜明对比，据报道，超薄聚合物薄膜的 Tg 值与本体值显着不同。
Polymeric capsules of a rod-like shape were prepared by depositing a poly(methyl methacrylate) or polystyrene thin layer onto the surface of calcium carbonate whisker via emulsion polymerization. The obtained core/shell capsules were also converted to hollow capsules by dissolving the core material in a hydrochloric acid solution. The average thickness of the outer shell (polymer layer) ranged from 29 to 72 nm. The glass transition temperatures Tg’s of the outer shell were almost identical to those of the bulk both for the core/shell and hollow capsules in contrast to the results for ultrathin polymer films, which have been reported to show significantly different Tg from the bulk value.