Synthesis and characterization of ZEin-based Low Density Porous Absorbent (ZELDA) for oil spill recovery
Synthesis and characterization of ZEin-based Low Density Porous Absorbent (ZELDA) for oil spill recovery
复制标题
DOI：
10.1016/j.colsurfa.2021.126148
复制
发表时间：
2021-02-03
影响因子：
5.2
通讯作者：
Bharti, Bhuvnesh
中科院分区：
文献类型：
--
作者：
Holley, Nathan P.;Lee, Jin Gyun;Bharti, Bhuvnesh
疏水多孔吸附剂处理水体溢油因其工艺简单、适应性强、鲁棒性好而受到广泛关注。然而，在清理过程中使用不可生物降解的合成吸油剂引发了另一个问题，如产生可在海洋和其他生态系统中积累的塑料污染物。为了应对这种潜在的危害，需要找到新的生物相容性替代品来替代目前使用的不可降解多孔材料。本文介绍了用乳液模板法合成的基于玉米蛋白的低密度多孔吸附剂（ZELDA），这是一种新型的天然衍生多孔材料，具有可调的疏水性，用于溢油回收。玉米衍生的玉米蛋白纳米颗粒首先用于形成水包油皮克林乳液。将聚合玉米蛋白加入到乳液的连续水相中，并使其逐渐相分离，从而形成多孔基质。通过调节Pickering乳液的油水相体积比和亚麻籽油选择性表面功能化，可以对ZELDA的孔径、表面润湿性和吸油能力进行编程。合成的ZELDA可以用氧化铁纳米颗粒进一步修饰，以诱导磁响应，从而实现其无接触可操作性和从溢出部位去除。该研究概述了一种合成玉米蛋白基多孔材料的新方法，并介绍了多孔材料的可控表面功能化、润湿性和刺激响应性的合成路线。合成的植物基材料为商业上使用的不可生物降解的石油吸附剂提供了一种环保的替代品，用于溢油修复。
Removal of spilled petroleum oil from water bodies using hydrophobic porous absorbent has garnered considerable attention due to the simplicity, large-scale adaptability and robustness of the process. However, the use of nonbiodegradable synthetic oil absorbent during cleanup has raised a secondary concern such as generating plastic pollutants that can accumulate in marine and other ecosystems. To encounter this potential hazard, there is a need to find new biocompatible alternatives to currently used non-degradable porous materials. Here we present ZEin-based Low Density porous Absorbent (ZELDA) synthesized from an emulsion templating method as a new class of naturally derived porous material with tunable hydrophobicity for oil spill recovery. Corn-derived zein nanoparticles are first used to form oil-in-water Pickering emulsion. The addition of polymeric zein into the continuous aqueous phase of the emulsion, and its gradual phase separation enables the formation of a porous matrix. The pore diameter, surface wettability, and oil uptake capacity of ZELDA can be programmed by tuning oil-to-water phase volume ratio of the Pickering emulsion and its selective surface functionalization using flaxseed oil. The synthesis of ZELDA can be further modified with iron oxide nanoparticles to induce magnetic response, which enables its contactless maneuverability and removal from spilled site. The study outlines a new method of synthesis of zein-based porous materials and introduces synthetic routes for controlled surface functionalization, wettability, and stimuli responsiveness of the porous material. The synthesized plant-based material provides an ecofriendly alternative to commercially used nonbiodegradable oil sorbents for spilled oil remediation.