Nontraditional oil sorbents: Hydrophilic sponges with hydrophobic skin layer for efficient oil spill remediation
Source abstract
Abstract
基于多孔材料的油水分离为解决溢油污染问题提供了一个有前景的途径. 传统上, 为了实现选择性吸油, 多孔材料需要用低表面能化学试剂进行充分的疏水处理, 以赋予其疏水/亲油特性. 然而, 这种充分的疏水处理既导致了高成本, 又由于过度的化学试剂消耗增加了环境危害, 阻碍了其实际应用. 在此, 我们通过一种简单的液体薄膜浸渍技术, 开发了一种替代性的吸油剂, 即具有疏水皮肤层的亲水海绵. 与传统的全疏水吸油剂不同, 我们制备的海绵只有最外层用疏水聚二甲基硅氧烷(PDMS)涂层进行了改性, 疏水化学试剂消耗减少达80%. 该海绵疏水皮肤层阻挡了水的进入, 而内部亲水主体促进了油的吸收, 因此可以从油水混合物中高度选择性吸收油. 更重要的是, 这种皮肤层结构海绵表现出增强的吸油速度. 与传统的疏水海绵相比, 在吸收相同质量原油时, 吸收时间可减少36%. 这主要归功于其亲水内部通道相比于传统吸油剂疏水通道具有更强大的毛细管吸收作用. 此外, 该海绵还显示出比完全疏水海绵更强的吸收容量. 这项研究提供了一个开发具有增强吸油性能的低成本、 环境友好吸油剂的通用策略.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Surface Modification and Superhydrophobicity · Advanced Sensor and Energy Harvesting Materials · Fluid Dynamics and Heat Transfer
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (47)
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