Polymorph control of a complex BaCO₃ superstructure through the cooperation of an insoluble polylactide self-assembled film and soluble poly allylamine modifier

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• 作者：Fangzhi Huang ; Yuhua Shen ; Anjian Xie ; Li Zhang ; Wanghua Xu ; Shikuo Li ; Wensheng Lu
• 关键词：Double polymer template ; Complex superstructure ; Barium carbonate ; Controlled morphogenesis ; Poly allylamine
• 刊名：Reactive and Functional Polymers
• 出版年：2009
• 出版时间：November 2009
• 年：2009
• 卷：69
• 期：11
• 页码：843-850
• 全文大小：1870 K

文摘

We have developed a novel 3D polymer template composed of a self-assembled film (SAF, insoluble polylactide film) and a soluble modifier (poly allylamine) and used this template to synthesize barium carbonate with a complex superstructure. Controlled synthesis of barium carbonate with novel morphologies such as spherical crystals consisting of needle-like building blocks, flower-like congeries consisting of one pronounced backbone and many shuttle-like petals, raft-like barium carbonate bundles consisting of tiny fractions etc., was realized by finely tuning the alignment and self-assembly of rods using the double template. The observed crystallization can proceed along the so-called rod-dumbbell-sphere formation process. This approach will be further extended to polymer-controlled fabrication of related minerals with novel, complex superstructures.