Abstract The preparation of oil absorption materials with both low-cost and high efficiency remains a great challenge. In this work, a waste epoxy resins (EPs) derived hydrophobic modifier was developed to fabricate high-efficient oil absorbents by simple dip-coating on melamine foam (MF). EPs were effectively degraded by acid digestion in mild condition to obtain the degradation products (DEPs) with a large molecular weight. DEPs can be directly used as a hydrophobic agent due to excellent hydrophobicity and processability. The resulting DEPs@MF exhibited excellent absorption performance for various oils or organic solvents with an ultrafast adsorption rate of 2 s and high oil absorption capacity of 116 g g−1. Moreover, the absorbed oils can be recovered by simple mechanical extrusion, and the adsorption capacity of the DEPs@MF did not deteriorate even after it was reused for 10 times. Besides, an oil recovery unit was successfully designed to achieve continuous oil–water separation. This research not only provides a new approach to the preparation of highly efficient and reusable oil-absorbing materials, but also provides new insight into solving the increasingly serious problem of waste thermosetting polymers.

中文翻译：

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回收废环氧树脂作为三聚氰胺泡沫疏水涂层高效吸油

摘要 制备低成本、高效率的吸油材料仍然是一个巨大的挑战。在这项工作中，开发了一种废环氧树脂（EPs）衍生的疏水改性剂，通过在三聚氰胺泡沫（MF）上进行简单的浸涂来制造高效的吸油剂。在温和条件下通过酸消化有效降解EPs，获得大分子量的降解产物（DEPs）。由于优异的疏水性和可加工性，DEPs 可直接用作疏水剂。所得的 DEPs@MF 对各种油或有机溶剂表现出优异的吸收性能，超快吸附速率为 2 s，吸油量高达 116 g g-1。此外，吸收的油可以通过简单的机械挤压回收，并且 DEPs@MF 的吸附能力即使在重复使用 10 次后也没有下降。此外，还成功设计了一个采油装置以实现连续油水分离。这项研究不仅为制备高效、可重复使用的吸油材料提供了一种新方法，而且为解决日益严重的废弃热固性聚合物问题提供了新的见解。