基于超临界CO_2防紫外线聚酯织物的制备

Preparation of Ultraviolet-proof Polyester Fabric Based on Supercritical CO_2

探讨超临界CO_2渗透与热还原处理用于制备纳米氧化锌防紫外线聚酯织物的效果。利用超临界CO_2流体的超渗透扩散能力,在超临界状态下将乙酰丙酮锌渗透到聚酯纤维中,然后通过热还原的方法使包含于聚酯纤维中的乙酰丙酮锌还原成纳米氧化锌,制备出具有防紫外线能力的聚酯织物。测试了所得织物的防紫外线性能。结果表明:经过超临界渗透与热还原处理后,纳米氧化锌在聚酯织物中沉积,织物表现出良好的防紫外线效果(UPF值100+)及持久性,平均拉伸性能从143.0N降到127.6N。认为:超临界热还原法制备的聚酯织物紫外线防护效果优于传统浸渍法,且耐水洗效果较好。

The effect of supercritical CO2 permeation and thermal recovery treatment used in the preparation of nanometer ZnO ultraviolet proof polyester fabric was discussed. The super permeation ＆ diffusivity a bility of supercritical CO2 fluid was used. Under the supercritical condition,the Zinc acetylacetonate was per meated into polyester fibers. Then the Zinc acetylacetonate in the polyester fiber was reverted to nanometer ZnO by the method of thermal recovery. Moreover, the polyester fabric with ultraviolet proof property was prepared. The ultraviolet proof property of the fabric was tested. The test results showed that the nanometer ZnO was deposited in the polyester fabrics after supercritical CO2 permeation and thermal recovery treatment. The fabric showed better ultraviolet proof property （UPF value 100＋） and durability. The average tensile strength was decreased from 143. 0 N to 127. 6 N. It is considered that the ultraviolet proof effect of polyester fabric produced by supercritical thermal recovery method is better than that with traditional impregnation method and the washable effect is better.