SiO_(2)气凝胶/六钛酸钾晶须涂层织物的制备及其隔热性能

Preparation and thermal insulation properties of SiO_(2)aerogel/potassium hexatitanate whisker composite coated fabric

为进一步提升SiO_(2)气凝胶涂层织物的隔热性能并探究涂层整理工艺对SiO_(2)气凝胶/六钛酸钾晶须复合涂层织物性能的影响,制备了单一SiO_(2)气凝胶涂层织物和SiO_(2)气凝胶/六钛酸钾晶须复合涂层织物,并对其隔热性能进行了测试。结果表明:单一SiO_(2)气凝胶涂层织物的隔热性能与其隔热粒子含量成正比,掺杂六钛酸钾晶须后涂层织物的隔热性能进一步提升,且随着SiO_(2)气凝胶含量增加,其隔热性能呈现先增后降趋势。当SiO_(2)气凝胶与六钛酸钾晶须的质量比为3∶7时,涂层织物的隔热性能达到最佳;涂层织物的隔热性能同时也受聚丙烯酸酯含量的影响,随聚丙烯酸酯含量增加,涂层织物隔热性能有下降趋势。当聚丙烯酸酯与去离子水质量比为1∶9时,SiO_(2)气凝胶/六钛酸钾晶须复合涂层织物的导热系数可达0.2315 W/(m·K),相比原织物降低了19.4%;当聚丙烯酸酯与去离子水质量比为2∶8时,涂层织物在热源照射下内侧升温最低,相比原织物降低19.70℃。

In order to further improve the thermal insulation performance of SiO_(2)aerogel coated fabric and explore the influence of coating process on the performance of SiO_(2)aerogel/potassium hexatitanate whisker composite coated fabric,both single SiO_(2)aerogel coating fabric and SiO_(2)aerogel/potassium hexatitanate whisker composite coating fabric were prepared,and their thermal insulation were tested.The results show that the thermal insulation performance of the fabric coated with single SiO_(2)aerogel is in direct proportion to the content of thermal insulation particles.The thermal insulation performance of the fabric is further improved after doping potassium hexatitanate whiskers.And the thermal insulation performance of the fabric first increases and then decreases with the increase of the SiO_(2)aerogel content.When the ratio of SiO_(2)aerogel to potassium hexatitanate whiskers is 3∶7,the thermal insulation performance of the coated fabric is the best.The thermal insulation performance of coated fabrics is also affected by the content of polyacrylate.With the increase of polyacrylate content,the thermal insulation performance of coated fabrics shows a downward trend.When the ratio of deionized water to polyacrylate is 9∶1,the thermal conductivity of the composite coated fabric is the lowest of 0.2315 W/(m·K),which is 19.4%lower than that of the original fabric.When the ratio of polyacrylate to deionized water is 2∶8,the coated fabric has the lowest temperature rise rate on the inner and surface under heat source irradiation,which is 19.70℃lower than that of the original fabric.