髹漆丝织品光老化性能的测试分析

摘要

The properties of light aged lacquer coated silk fabrics were examined to understand the resistance of these materials to light aging and to act as reference for the preservation and display of the excavated lacquer coated silks.Three kinds of samples,uncoated silk,silk fabrics coated with lacquer and silk fabrics coated with lacquer mixed with 15% tung-oil,were artificially light aged.These studies showed that tensile strength and elongation at the breaking point of both pure lacquer coated fabrics and tung-oil and lacquer coated fabrics decreased and were much smaller than those for pure silk fabrics.Tung-oil and lacquer coated fabrics had the smallest decrease.Both lacquer and tung-oil films showed slight hollowing and fracturing under light.Pure lacquer film had more damage.During light-aging process,lacquer was able to preserve the silk fibers well.No change in crystallinity was observed on coated silk but it was observed with uncoated silk.These results can serve as references for preservation and exhibition of excavated lacquer coated silks.%髹漆丝织品光老化性能的测试分析,旨在了解其抗光老化的能力,为出土髹漆丝织品的保存和展示提供科学的依据。本工作以精制纯漆和桐油漆料分别髹涂的丝织物及未经髹涂的丝织品为试样,进行加速光老化处理。对试样的测试表明,两种髹漆试样经光照后强伸性下降轻缓,相同时段的降幅远低于丝织品,桐油漆试样降幅最小。两种漆膜在光老化中均有轻微的空洞和裂纹,纯漆膜损伤稍大。光老化过程中,漆膜对丝纤维的保护作用较好,漆丝的结晶度未有明显下降,而未髹漆丝纤维的结晶度下降显著。本研究的结果可以为出土髹漆丝织品的保存和展示提供科学的依据。