超轻 3D 分级纳米纤维素气凝胶泡沫，具有优异的吸油性能。

Super light 3D hierarchical nanocellulose aerogel foam with superior oil adsorption.

机构信息

Key Lab of Chemical Assessment and Sustainability, Department of Chemistry, Tongji University, Shanghai 200092, China.

出版信息

J Colloid Interface Sci. 2019 Feb 15;536:245-251. doi: 10.1016/j.jcis.2018.10.038. Epub 2018 Oct 16.

DOI:10.1016/j.jcis.2018.10.038

Abstract

In this work, the concentration effect of both nanocellulose and sodium dodecylsulfate (SDS) on the fabrication of a super light 3D hierarchical framework adsorbent nanocellulose aerogel foam (NAF) is exploited through a high speed mechanical foaming and solvent-free method by adding SDS. The results show that the optimal concentration of nanocellulose and SDS for preparation of this 3D NAF/SDS is 0.4 and 0.2 wt%, accordingly. By utilizing unique gridding framework of NAF/SDS, a low density of 1.50 mg cm and high adsorption capacity of 206.79, 194.75 and 145.20 g g towards cyclohexane, ethyl acetate, and vacuum pump oil, accordingly, are achieved in the as-prepared NAF/SDS, which is much higher than that of conventional nanocellulose aerogel (NA) (52.07, 81.12 and 34.52 g g, respectively). The results illustrate that this NAF/SDS is a promising candidate for preparing 3D hierarchical network structure from natural polymer cellulose in an environmental control for oil adsorption.

摘要

在这项工作中，通过高速机械发泡和无溶剂方法，利用纳米纤维素和十二烷基硫酸钠 (SDS) 对纳米纤维素气凝胶泡沫 (NAF) 的制备的浓度效应，在 SDS 存在的情况下，制备出超轻的 3D 分级框架吸附纳米纤维素气凝胶泡沫 (NAF)。结果表明，制备这种 3D NAF/SDS 的最佳纳米纤维素和 SDS 浓度分别为 0.4 和 0.2wt%。通过利用 NAF/SDS 的独特网格框架，在制备的 NAF/SDS 中实现了低密度 1.50mg/cm 和高吸附能力 206.79、194.75 和 145.20g/g 分别针对环己烷、乙酸乙酯和真空泵油，远高于传统纳米纤维素气凝胶 (NA)（分别为 52.07、81.12 和 34.52g/g）。结果表明，该 NAF/SDS 是一种很有前途的候选材料，可在环境控制下，从天然聚合物纤维素中制备 3D 分级网络结构，用于吸附油。