摘要
智能调温纺织品能够对外界环境温度变化起到一定的缓冲与调节作用.本文以相变温度为18℃的石蜡为核层,聚偏氟乙烯-六氟丙烯/纳米SiO2为壳层,采用同轴静电纺丝技术制备了一种能有效克服石蜡泄漏的智能调温纺织品.其纤维在微观下具备明显可见的核壳结构,潜热可达70.08J/g,且经过 400次加热-冷却循环后潜热未出现明显变化,表现出了良好的稳定性.该智能纺织品具备疏水表面,由于SiO2纳米颗粒在纤维表面形成纳米突起,与无纳米SiO2颗粒的纤维织物相比,水在该纤维织物表面的接触角提升了16.1°.此外,在酸、碱、盐等条件下均能保持较大接触角,分别达到129.4°、133.3°和135.6°,具备较强的环境适应性.红外成像实验表明,与不含相变材料的织物相比,在降温过程中,该智能调温纺织品可将温度保持在10℃以上的时间延长83.3%,而在升温过程中可将温度维持在20℃以下的时间延长204.76%,表现出良好的温度调节能力.研究结果为石蜡相变调温织物的后续研究奠定了基础,并对类似的智能调温织物研究具有一定的参考价值.
Abstract
Intelligent thermo-regulatory textiles are able to buffer and regulate the changes in ambient temperature.In this study,an intelligent thermo-regulatory textile with an obvious core-shell structure that could effectively overcome the leakage of paraffin wax was prepared using coaxial electrospinning technology with paraffin wax of a phase change temperature of 18℃as the core layer and polyvinylidene fluoride-hexafluoropropylene/nano SiO2 as the shell layer.The smart textile had a latent heat of up to 70.08J/g and showed good stability as it did not show significant change in latent heat after 400 heating-cooling cycles.This smart textile had a hydrophobic surface and the contact angle of water on the surface was increased by 16.1° compared to the textile without SiO2 nanoparticles,which can be attributed to the formation of nano-protrusions due to the exist of nano SiO2.Besides,the contact angles of acid,alkali and salt solution on the textile reached 129.4°,133.3° and 135.6°,respectively,which enabled its application in different harsh environments.The infrared imaging experiment indicated that compared with the textile without phase change materials,the time the temperature maintained above 10℃can be prolonged by 83.3%by the intelligent thermoregulated textile during the cooling process,while the time the temperature maintained below 20℃during the heating process can be prolonged by 204.76%,providing remarkable temperature regulatory capabilities.These results established a foundation for the further research on thermo-regulatory fibers with paraffin wax as phase change materials and had guiding significance for similar research on intelligent thermo-regulatory fibers.
基金项目
国家重点研发计划(2018YFA0702300)
云南省重大科技专项(202202AE090011)
国家科技期刊平台
NSTL
万方数据