Abstract
Hierarchical polyimide hollow spheres consisting of crystalline nanoparticles were synthesized by a novel gas bubble templated transimidization induced crystallization process. The morphologies of the hollow spheres can be fine-tuned by changing the concentrations and the chemical structure of the monomers. Based on the experimental results, a possible formation mechanism of these polyimide hollow spheres was proposed based on the aggregation of the primary crystalline polyimide nanoparticles on the in situ formed gas bubbles as soft templates to minimize the interfacial energy.
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Acknowledgments
We are grateful for the financial support from the National Natural Science Foundation of China (Nos. 20974069, 21174089), the Ministry of Education (JS20091210507067) and Sichuan University (Founds for Introduced Talents, No. 0082204121012).
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Yan, Y., Chen, L., Li, X. et al. Preparation of hierarchical polyimide hollow spheres via a gas bubble templated transimidization induced crystallization process. Polym. Bull. 69, 675–684 (2012). https://doi.org/10.1007/s00289-012-0754-6
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DOI: https://doi.org/10.1007/s00289-012-0754-6