Hollow silica nanosphere/polyimide composite films for enhanced transparency and atomic oxygen resistance
Hollow silica nanosphere/polyimide composite films for enhanced transparency and atomic oxygen resistance
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中空二氧化硅纳米球/聚酰亚胺复合薄膜，增强透明度和原子氧耐受性
DOI：
10.1016/j.matchemphys.2018.10.022
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发表时间：
2019
影响因子：
4.6
通讯作者：
Song Weijie
中科院分区：
文献类型：
--
作者：
Zhang Jing;Ai Ling;Li Xiao;Zhang Xianpeng;Lu Yuehui;Chen Guofei;Fang Xingzhong;Dai Ning;Tan Runqin;Song Weijie
在低地球轨道（LEO）空间，透明聚酰亚胺（PI）薄膜具有高透过率和强抗原子氧（AO）能力，可为航天器中新型轻质太阳能电池阵列提供有效的保护和能量收集。在这项工作中，中空二氧化硅纳米球（HSNs）镶嵌在透明的PI膜形成的HSN/PI复合结构，其中HSNs首先通过基于溶液的去除有机模板从PAA-二氧化硅核-壳纳米球，从常见的高温处理，然后转移到PI基板。HSN/PI复合结构导致比原始PI更高的透射率和更强的抗AO性：复合柔性膜在宽波长下的平均透射率为92.43（400-1600 nm），并且在6.05 × 1020 atoms/cm 2的AO曝光后，AO侵蚀产率为4.67 × 10 - 26 cm 3/atom，这两个值分别为90.80%和1.33 × 10 - 24 cm ~ 3/atom，均优于原始PI的上级值。同时实现抗反射（AR），抗AO和机械鲁棒PI复合柔性膜提供了新的解决方案，传统的AR图案化的抗AO PI和洞察力的多功能化的PI在LEO空间环境。
In the low Earth orbit (LEO) space, transparent polyimide (PI) films with high transmittance and strong resistance to atomic oxygen (AO) are pursued for providing effective protection and energy harvesting for novel lightweight solar arrays in spacecraft. In this work, hollow silica nanospheres (HSNs) were inlaid in transparent PI films for the formation of an HSN/PI composite structure, where the HSNs were first generated by a solution-based removal of organic templates from PAA-silica core-shell nanospheres, free from common high-temperature treatments, and then transferred to PI substrates. The HSN/PI composite structures resulted in the higher transmittance and stronger resistance to AO than did the pristine PI: the composite flexible films showed an average transmittance of 92.43% at broad wavelengths (400–1600 nm) and an AO erosion yield of 4.67 × 10−26cm3/atom after an AO exposure of 6.05 × 1020atoms/cm2, which were superior to those of the pristine PI (90.80% and 1.33 × 10−24cm3/atom, respectively). Simultaneous realization of antireflective (AR), AO resistant, and mechanically robust PI composite flexible films provides new solutions to traditional AR patterned AO-resistant PIs and insights into the multifunctionalization of PIs in the LEO space environment.