SBIR/STTR PHASE I: Ceramic/Polymide Nanocomposite Possessing Controlled Coefficient of Thermal Expansion

该小型企业创新研究（SBIR）第一阶段项目将专注于开发独特的陶瓷/聚酰亚胺纳米复合材料。它将展示通过共价结合陶瓷纳米相材料来配制具有设计的热膨胀系数（CTE）的聚酰亚胺（或其他聚合物材料）的能力。关键任务包括（1）溶胶-凝胶法合成具有负CTE的陶瓷纳米球（2）通过使用双官能连接分子将它们共价键合到聚酰亚胺的主链中（3）评估陶瓷纳米球的各种掺杂水平以确定对复合材料CTE的最佳影响。 就商业用途而言，聚酰亚胺作为薄膜在电子、航空航天和制造业中具有广泛的应用，其中它们用于柔性电路、绝缘材料、扬声器锥体、汽车开关、磁盘驱动器和许多其他应用。在使用聚酰亚胺的这些系统的设计中的常见问题是这些材料固有的高CTE和在一定程度上差的热尺寸稳定性。拟议的努力旨在提供解决这些问题的办法。

This Small Business Innovation Research (SBIR) Phase I project will focus on development of unique ceramic/polyimide nanocomposite materials. It will demonstrate the ability to formulate a polyimide (or other polymer material) with a designed coefficient of thermal expansion (CTE) through the covalent incorporation of ceramic nanophase materials. The key tasks involve (1) sol-gel synthesis of ceramic nanospheres possessing a negative CTE (2) covalently bonding them into the backbone of thepolyimide through the use of bi-functional linker molecules and (3) evaluation of various doping levels of the ceramic nanospheres to determine optimum impact on the CTE of the composite material. In terms of commercial uses, polyimides have wide application as films inthe electronics, aerospace, and manufacturing industries where they are used for flexiblecircuitry, insulation materials, speaker cones, automotive switches, disk drives, and inmany other applications. A common problem in the design of these systems using polyimides is the inherently high CTE of these materials and to a certain extent poor thermal dimensional stability. The proposed effort seeks to provide an approach to resolve these issues.