Facile Fabrication of Superhydrophobic Paper with Excellent Water Repellency and Moisture Resistance by Phase Separation
Facile Fabrication of Superhydrophobic Paper with Excellent Water Repellency and Moisture Resistance by Phase Separation
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通过相分离轻松制备具有优异拒水性和防潮性的超疏水纸
DOI：
10.15376/biores.11.3.6552-6565
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发表时间：
2016
期刊：
影响因子：
1.5
通讯作者：
Yahong Meng
中科院分区：
文献类型：
--
作者：
Pan Li;Hui Li;Jin Yang;Yahong Meng
采用相分离法将巴西棕榈蜡沉淀到纤维素纤维表面，制备出一种简单而有效的具有良好耐湿性的超疏水纸张。采用响应面方法(RSM)优化了制备参数对纸张表面水接触角的影响。四个自变量分别为棕榈蜡浓度、浸泡时间、凝固浴比(水/乙醇)和凝固浴时间。最佳处理条件为：石蜡浓度为3.78%(蜡/氯仿，w/v)，浸泡时间为1.46h，凝固浴比为13/87(水/乙醇，v/v)，凝固浴时间为2.63h，在此条件下，实验测得的吸水率为152.7°，与预测值154.1°基本一致。用扫描电子显微镜(SEM)和原子力显微镜(AFM)对超疏水纸张的表面形貌进行了表征，结果表明，棕榈蜡的簇状聚集完全覆盖了纤维表面，导致粗糙度增加。此外，还对制得的超疏水纸张的耐湿性进行了评价。结果表明，在高相对湿度条件下，超疏水纸张的耐湿性显著提高，抗张强度仍保持较高水平。
A simple but effective method of fabricating superhydrophobic paper with excellent moisture resistance was developed by precipitating carnauba wax onto the surface of cellulose fibers using a phase separation method. Response surface methodology (RSM) was used to optimize the effects of the preparation variables on the water contact angle (WCA) of the paper surface. The four independent variables were carnauba wax concentration, immersion time, coagulation bath ratio (water/ethanol), and coagulation bath time. The optimal treatment conditions were as follows: wax concentration, 3.78% (wax/chloroform, w/v); immersion time, 1.46 h; coagulation bath ratio, 13/87 (water/ethanol, v/v); and coagulation bath time, 2.63 h. Under these conditions, the experimental WCA reached 152.7°, which agreed closely with the predicted value of 154.1°. The surface morphology of the superhydrophobic paper was characterized by scanning electron microscopy (SEM) and atomic force microscopy (AFM), and the images showed that cluster-like carnauba wax aggregation completely covered the fiber surface, resulting in increased roughness. Moreover, the moisture resistance of the obtained superhydrophobic paper was evaluated. The results demonstrated that under high relative humidity conditions, the moisture resistance of the superhydrophobic paper significantly improved, and its tensile strength remained high.