超疏水纸基材料的制备及其性能分析

Preparation and Properties Analysis of Superhydrophobic Paper-based Material

本研究采用浆内施胶的方法抄纸,用柠檬酸(CA)预处理提高其表面活性,再用纤维素纳米纤丝/二氧化钛(CNF/TiO_(2))悬浮液涂布,以提高纸基材料表面粗糙程度,最后用烷基烯酮二聚体(AKD)乳液浸渍处理以提高纸基材料的憎水性,得到超疏水纸基材料。结果表明,CA预处理显著改善了纸基材料的表面活性,使纸基材料具有更高的TiO_(2)保留率,使其更易达到超疏水纸基材料所需的表面粗糙度。制备的超疏水纸基材料表面接触角达153.8°,达到超疏水要求,且具有良好的自清洁能力。

In this study,the original paper was prepared by internal sizing and pretreated with citric acid(CA)to improve its surface activity,then coated by cellulose nanofibril/titanium dioxide(CNF/TiO_(2))suspension to improve its surface roughness.Finally,the superhydrophobic paper-based material was prepared via impregnated into alkyl ketene dimer(AKD)emulsion to improve its hydrophobicity.The results showed that the surface activity of paper was significantly improved by CA pretreatment,giving a higher TiO_(2)retention for the paper,and made it easier to achieve the required surface roughness of the superhydrophobic paper-based material.The prepared superhydrophobic paper-based material had a contact angle of 153.8°,which met the requirements of superhydrophobic materials,and also showed good selfcleaning ability.