School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China; State Key Laboratory of New Textile Materials and Advanced Processing Technologies, School of Textile Science and Engineering, Wuhan Textile University, Wuhan 430200, China.
State Key Laboratory of New Textile Materials and Advanced Processing Technologies, School of Textile Science and Engineering, Wuhan Textile University, Wuhan 430200, China.
Carbohydr Polym. 2023 Apr 1;305:120538. doi: 10.1016/j.carbpol.2023.120538. Epub 2023 Jan 5.
Oil pollution has caused more and more serious damages to the environment, especially to water. Oil and water separation technologies based on high-performance absorbing materials have attracted extensive attentions. Herein, elasticity-enhanced bacterial cellulose (BC) aerogel is synthesized for oil/water separation through thermochemical vapor deposition (CVD) catalyzed by 1, 2, 3, 4-butanetetracarboxylic acid (BTCA). BTCA has two functions, namely, esterification with BC and catalyzing CVD. The prepared aerogel could be recovered soon after being compressed and the elastic recovery was >90 % at set maximum deformation of 80 %. And, it also exhibits vigorous fatigue resistance with an elastic deformation of >80 % after 50 cycles. The high elastic and hydrophobic aerogel is very suitable for absorbing and desorbing oils by simple mechanical squeezing. The adsorption capacity for n-hexane and dichloroethane maintain 87 % and 81 % after 50 cycles, respectively, which implies robust reusability. Importantly, the CVD could also be catalyzed by other solid acids such as citric acid and vitamin C. This design and fabrication method offers a novel avenue for the preparation of hydrophobic bacterial cellulose aerogel with high elasticity.
石油污染对环境造成了越来越严重的破坏，尤其是对水的破坏。基于高性能吸收材料的油水分离技术引起了广泛关注。在此，通过 1,2,3,4-丁烷四羧酸（BTCA）催化的热化学气相沉积（CVD）合成了弹性增强的细菌纤维素（BC）气凝胶，用于油水分离。BTCA 具有两种功能，即与 BC 酯化和催化 CVD。制备的气凝胶在压缩后可以很快回收，在设定的最大变形 80%时弹性回复率>90%。并且，它还表现出很强的耐疲劳性，在 50 个循环后弹性变形>80%。这种高弹性和疏水性气凝胶非常适合通过简单的机械挤压来吸收和脱附油。对正己烷和二氯乙烷的吸附容量在 50 个循环后分别保持 87%和 81%，这表明其具有很强的可重复使用性。重要的是，CVD 也可以被其他固体酸如柠檬酸和维生素 C 催化。这种设计和制造方法为制备具有高弹性的疏水性细菌纤维素气凝胶提供了一条新途径。
