TiO_(2)/PLA超疏水复合膜材料的制备及其特性研究

Preparation and Characterization of TiO_(2)/PLA Superhydrophobic Composite Films

以十六烷基三甲氧基硅烷(HDTMS)对不同粒径的纳米二氧化钛(TiO_(2))进行有效改性,得到具有疏水效果且可在聚合物基体中分散的纳米填料。以聚乳酸(PLA)作为基体,通过非溶剂诱导相分离法制备超疏水TiO_(2)/PLA复合膜及TiO_(2)/SA/PLA复合膜。其中,TiO_(2)/PLA复合膜的水接触角最高可达152.6°,TiO_(2)/SA/PLA复合膜的接触角最高则可达161.0°。实验中制得的各类复合膜均具有较好的亲油性,对茶籽油的吸油率可达200%以上;此外,复合膜在自然条件下能生物降解,是一种环境友好型的功能材料。

In this study,hexadecyltrimethoxylsilane(HDTMS)was used to effectively modify nano-sized titanium dioxide(TiO_(2))to obtain hydrophobic nano-filler which could be dispersed in polymer matrix.Superhydrophobic titanium dioxide/polylactic acid composite membranes and titanium dioxide/stearic acid/polylactic acid composite membranes were prepared using polylactic acid(PLA)as matrix by non-solvent induced phase separation.The water contact angle of titanium dioxide/polylactic acid composite film was up to 152.6°,and that of titanium dioxide/stearic acid/polylactic acid composite film was up to 161.0°.All the composite films prepared in the experiment had excellent lipophilicity,and the oil absorption rate to tea seed oil could reach more than 200%.In addition,the composite membranes were environmentally friendly functional materials,which would biodegrade under natural conditions.