Synthesis and Properties of Polyimide Silica Nanocomposite Film with High Transparent and Radiation Resistance

Nanomaterials

Jindong Huang¹  Juncheng Liu¹  Beiping Dong¹  Guanglu Zhang¹ 

[1] School of Materials Science and Engineering, Tiangong University, Tianjin 300387, China;

关键词: polyimide;    nano-SiO₂;    in situ polymerization;    transmittance;    radiation resistance;    mechanical properties;   

DOI  :  10.3390/nano11030562

来源: DOAJ

【 摘 要 】

In order to prepare flexible glass cover sheet materials suitable for space solar cells, fluorinated diamine 2,2’-bistrifluoromethyl benzidine (TFDB) and fluorinated dianhydride 4,4’ (hexafluoroisopropyl) diphthalic dianhydride (6FDA) as the monomer, polyimide (PI)/SiO₂ composite film was synthesized by in situ polymerization, and the influence of coupling agent and SiO₂ nanoparticle content on the film structure and properties was studied. The results show that PI synthesized from fluorine-containing monomers has better light transmittance, and the highest transmittance can reach 91.4%. The average visible light transmittance of the composite film decreases with the increase of SiO₂ content, and the transmittance of the film decreases less in the high-wavelength region and greatly decreases in the low-wavelength region. The tensile strength and elastic modulus of PI/SiO₂ composite film increase with the increase of SiO₂ content, first increase and then decrease, reaching the maximum when the content is 10%; while the elongation at break of the composite film gradually increases with the increase of SiO₂ content reduce. The thermal stability of PI/SiO₂ composite film increases with the increase of SiO₂ content. The doping of nano-SiO₂ significantly suppresses the influence of irradiation on the mechanical properties of the film.

【 授权许可】

Unknown