当前位置: X-MOL 学术Ind. Crops Prod. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Fabrication of superhydrophobic/oleophilic starch cryogel via a simple sol-gel immersion process for removing oil from water
Industrial Crops and Products ( IF 5.9 ) Pub Date : 2022-05-11 , DOI: 10.1016/j.indcrop.2022.115010
Fan Wang, Rongrong Ma, Yaoqi Tian

Superhydrophobic/oleophilic adsorbents have attracted considerable attention for removing oil spill that poses a serious threat to the aquatic ecosystem. Porous starch–based materials have been proved to have good oil absorption performance, but superhydrophobicity of these materials has not yet been realized. Herein, a superhydrophobic starch-based adsorbent (HTSC) was fabricated through a simple sol–gel immersion process of hexadecyltrimethoxysilane and tetraethyl orthosilicate in the presence of starch cryogel. The adsorbent was simultaneously provided with low surface energy and hierarchical micro/nanostructures via hydrolysis–condensation reaction. HTSC exhibited high water contact angle (>153.0°) and low sliding angle (<8.0°) as well as excellent self-cleaning and anti-fouling properties. The structural support and stable chemical bonding endowed the material with good mechanical and chemical durability. HTSC also possessed reasonable oil adsorption performance (2.6–7.5 g/g), which was dominated by its porosity and followed pseudo-second-order model. Its selective wettability towards oil and water allowed it to be applied for oil removal under water and from the water surface. This novel superhydrophobic starch–based adsorbent shows promising application in oil spill cleanup.



中文翻译:

通过简单的溶胶-凝胶浸渍工艺制备超疏水/亲油淀粉冷冻凝胶,用于去除水中的油

超疏水/亲油吸附剂在去除对水生生态系统构成严重威胁的溢油方面引起了相当大的关注。多孔淀粉基材料已被证明具有良好的吸油性能,但这些材料的超疏水性尚未实现。在此,在淀粉冷冻凝胶存在下,通过十六烷基三甲氧基硅烷和原硅酸四乙酯的简单溶胶-凝胶浸渍工艺制备了超疏水淀粉基吸附剂(HTSC)。通过水解-缩合反应,吸附剂同时具有低表面能和分级微/纳米结构。HTSC表现出高水接触角(>153.0°)和低滑动角(<8.0°)以及优异的自清洁和防污性能。结构支撑和稳定的化学键合赋予材料良好的机械和化学耐久性。HTSC 还具有合理的吸油性能(2.6-7.5 g/g),主要由孔隙度决定,遵循准二级模型。它对油和水的选择性润湿性使其可用于在水下和水面上去除油。这种新型超疏水淀粉基吸附剂在溢油清理中显示出广阔的应用前景。

更新日期:2022-05-12
down
wechat
bug