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Self-Healing Graphene-Reinforced Composite for Highly Efficient Oil/Water Separation
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posted on 2019-10-17, 02:29 authored by Yahui Cai, Dongyun Chen, Najun Li, Qingfeng Xu, Hua Li, Jinghui He, Jianmei LuOne
of the most pervasive environmental problems is oily sewage;
emerging materials are needed that could effectively solve this global
challenge. Special wetting materials typically combine micro/nanoscale
hierarchical structures with a low surface energy, which could produce
superhydrophobic performance and these superhydrophobic materials
are very important for a wide variety of applications, including self-cleaning
and antiadhesives. However, the majority of these manmade materials
still suffer from poor durability, which seriously hinders their practical
applications. A better choice is that use of supramolecular materials
with self-healing ability, which could provide an efficient method
to solve materials poor durability problem. However, lightweight materials
with special wettbility and self-healing still remain a challenge.
In this work, we confine polyborosiloxane (PBS) in an ultralight graphene
network to form a robust, special function graphene foam that has
the ability to self-repair. Hydroxyl terminated poly(dimethylsiloxane)
and boric acid as the as raw material were used to synthesis PBS at
room temperature. The as-prepared composite network could be compressed
and their properties fully restored without an external stimulus after
being subjected to repeated damage. In addition, the prepared composite
foam retains the porosity of the original graphene foam. The present
work suggests encouraging applications of the self-healing graphene/PBS
foam in water/organic solvent separations.
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superhydrophobic performancegraphene foamsynthesis PBSSelf-Healing Graphene-Reinforced Compositesurface energydurability problemboric acidself-healing abilityapplicationfunction graphene foamsuperhydrophobic materialsultralight graphene networkmanmade materialsroom temperaturesupramolecular materials
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