疏水改性纳米SiO2制备及用于染色蚕丝织物增深整理的研究

Preparation of Hydrophobicity Modified Silica Nanoparticles and Their Performance in Deepening Dyed Silk Fabrics

为了解决蚕丝织物经现有增深剂整理后,其吸湿性降低、色光变化大等问题,以3-(甲基丙烯酰氧)丙基三甲氧基硅烷(MPS)对纳米SiO2进行疏水改性,制备新型增深剂MPS-SiO2,用于染色蚕丝织物的增深整理。对MPS-SiO2的碳元素含量测定结果表明,随MPS用量增大,SiO2疏水改性程度提高,但粒径变化不大。采用浸渍工艺,以MPS-SiO2整理染色蚕丝织物,考察整理液pH值、SiO2疏水改性程度和MPS-SiO2用量对增深效果的影响,结果表明:整理液pH=3、SiO2改性程度为3.2%时,MPS-SiO2的增深效率最高;提高MPS-SiO2用量,织物增深度随之增大,增深度与织物上的MPS-SiO2附着率呈现正相关。增深整理蚕丝织物的服用性能测试结果显示:织物的干摩擦牢度降低,当MPS-SiO2用量>10%(o.w.f.)时,甚至降至3级以下,但织物的湿摩擦牢度始终保持在4级;织物的耐水洗牢度不高,但毛细管效应与原织物持平,其吸湿性明显优于用氟硅树脂整理的织物;织物的明度降低,但Δa和Δb值变化较小,即色光变化不大。

In order to solve the problems of decreased hygroscopicity and increased shade change during deepening finishing of silk fabric using current deepening agents, a novel deepening agent named MPS-SiO2 was prepared via modification of silica nanoparticles using a hydrophobic silane coupling agent MPS （3-（methaoryloyloxy） propyltrimethoxysilan）. After the prepared MPS-SiO2 was used for deepening dyed silk fabrics, measurement of carbon content in MPS- SiO2 indicated that, as the dosage of MPS increased, the hydrophobic nature of SiO2 particles was improved while the particle size of them was changed slightly. After silk fabric was finished with MPS-SiO2 via immersion process, the effects of pH value of working liquid, the hydrophobic modification degree, and the dosage of MPS-SiO2 on deepening degree were investigated. The results displayed that the highest deepening efficiency was achieved when the working liquid had a pH value of 3 and SiO2 had a hydrophobic modification degree of 3.2%. Deepening degrees increased with the dosage of MPS-Si02. The deepening degree was positively correlated with the adsorption ratio of MPS-Si02 onto the fabric. Testing on clothing property of the deepened silk fabric demonstrated that the dry rubbing fastness grade of the fabric was lowered, which could be below 3 when MPS-SiO2 dosage was over 10% （o. w. f. ）, whereas the wet rubbing fastness grade remained at 4. Although the washing durability of the deepened silk fabric was not high, the capillary effect of it was at the same level with the original fabric and the hygroscopicity of it was obviously superior to that finished with fluoro-silicone resins. The deepened silk fabric had a reduced lightness. But its △a and △b values were changed little, i.e. with slight change in shade.