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首页> 外文期刊>Polymers for advanced technologies >Non-surfactant template-directed synthesis of SiO_2-polyimide hybrid self-standing films with ordered mesoporous structure
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Non-surfactant template-directed synthesis of SiO_2-polyimide hybrid self-standing films with ordered mesoporous structure

机译：具有表面介孔结构的SiO_2-聚酰亚胺杂化自立膜的非表面活性剂模板定向合成

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摘要

The silica-PI hybrid self-standing films with ordered mesoporous structure have been prepared by using dibenzoyl- L-tartaric acid (L-DBTA) as non-surfactant template under mild sol-gel route. Polyimide matrix was obtained from polyamic acid (PAA) via thermal imidization process and the template was removed in this process. The PI-based hybrid film with 20 wt% SiO_2 obtained from DBTA presented the ordered mesoporous channels with average pore size of about 2.0nm and BET surface area of 1167m~2/g. FTIR and SEM studies indicated that the hydrogen bond interaction between the carboxylic groups of DBTA and benzamide bonds of PAA made the PAA possibly participate in the assembly process of the aggregates of the non-surfactant template molecules. The mechanical, thermal and some physical properties of these hybrid films materials were also characterized.
机译：以二苯甲酰基-L-酒石酸（L-DBTA）为非表面活性剂模板，通过温和的溶胶-凝胶法制备了有序介孔结构的二氧化硅-PI杂化自立膜。通过热酰亚胺化过程从聚酰胺酸（PAA）获得聚酰亚胺基质，并在此过程中除去模板。由DBTA获得的具有20wt％SiO 2的PI基杂化膜呈现出有序的介孔通道，其平均孔径为约2.0nm，且BET表面积为1167m 2 / g。 FTIR和SEM研究表明，DBTA的羧基与PAA的苯甲酰胺键之间的氢键相互作用使得PAA可能参与了非表面活性剂模板分子聚集体的组装过程。这些杂化薄膜材料的机械，热和一些物理性能也得到了表征。

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