材料科学
气凝胶
聚酰亚胺
复合材料
织物
氮化硼
复合数
纤维
相(物质)
图层(电子)
有机化学
化学
作者
Qiaoran Zhang,Tiantian Xue,Jing Tian,Yi Yang,Wei Fan,Tianxi Liu
标识
DOI:10.1016/j.compscitech.2022.109541
摘要
Aerogel fibers, which are beneficial for enhancing the thermal response and preventing the leakage of phase-changeable materials (PCMs) during phase change process, are excellent candidates for phase-changeable textiles with excellent thermoregulating performance. Herein, polyimide/boron nitride (PI-BN) composite aerogel fibers with highly porous structure and good mechanical strength have been prepared by freeze-spinning technique, which could be served as the heat conduction path and skeleton for PCMs. Into the pores of the PI-BN aerogel textile was incorporated polyethylene glycol (PEG) by vacuum impregnation to obtain phase-changeable PI-BN/PEG textile. The high thermal conductivity of PI-BN skeleton could endow the quick thermal response rate of PI-BN/PEG textile upon the phase change process, while the high porosity of aerogel fiber could allow high loading of PEG and inhibit liquid leakage during phase change process. The resultant PI-BN/PEG composite textile has high thermal conductivity (5.34 W m −1 K −1 ), high enthalpy (125.2 J g −1 ) and excellent work stability after 100 heating-cooling cycles, accounting for the desired thermoregulating performance. Moreover, polydimethylsiloxane (PDMS) has been coated on the surface of PI-BN/PEG textile, endowing the textile hydrophobicity, waterproofness and washability, indicating its great potential as candidate for personal thermal management. The phase-changeable polyimide-boron nitride/polyethylene glycol (PI-BN/PEG) composite textile exhibits high thermal conductivity, high phase change enthalpy and excellent work stability after 100 heating-cooling cycles, indicating its great potential as candidate for personal thermal management.
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