纳米氧化锌抗紫外织物整理剂的分散性能

Study on Dispersibility of Nano-ZnO in Anti-UV Finishing Agents

以纳米氧化锌为抗紫外线屏蔽剂,有机硅-聚丙烯酸酯乳液为粘合剂制备抗紫外织物整理剂.为获得分散性能稳定的纳米氧化锌抗紫外织物整理剂,尝试了利用改性剂进行表面改性、加入硅烷偶联剂与纳米氧化锌和有机聚合物作用、添加分散剂等方法,探讨了影响纳米氧化锌分散性能的因素,确定了最佳制备工艺路线:首先对纳米氧化锌进行表面改性,采用表面沉积法在纳米氧化锌表面沉积部分无机化合物,增加其亲水性;然后利用硅烷偶联剂中2种不同的化学基因分别与纳米氧化锌和有机硅-聚丙烯酸酯相互作用,进一步增加纳米氧化锌的分散稳定性,最后添加适当的分散剂.经过对纯棉和涤纶织物进行抗紫外整理,获得良好的紫外线屏蔽效果.

Anti-UV finishing agent was prepared with nano-ZnO as UV shielding agent and organopolyacrylate emulsion as adhesive. In order to obtain well-dispersed nano--ZnO anti-UV fin- ishing agent, several methods were tested such as modifying by inorganic compounds, adding silane coupling agents to interact with both nano-ZnO and the organic polymer, adding different dispersants. The factors affecting the dispersibility of nano-ZnO were discussed and the optimum procedure to prepare the finishing agent was concluded. First the nano-ZnO was modified by de- positing inorganic compounds on its surface to increase the hydrophility of nano-ZnO. Then through the interaction of silane coupling agents with nano-ZnO and the organic polymer, the dis- persability of nano-ZnO was improved much. At last some suitable dispersants were added to the system. Results show that after anti-UV finishing, good anti-UV effects can be achieved.