A scalable versatile methodology to construct micro/nano open-cell polypropylene foam with high oil adsorption capacity and speed  

作　　者：Chenguang Yang Dechang Tao Kun Yan Zhiyao Li Qingshi Guo Wenwen Wang Dong Wang 

机构地区：[1]Key Laboratory of Textile Fiber and Products(Wuhan Textile University),Ministry of Education,Wuhan Textile University,Wuhan 430200,China [2]College of Chemistry,Chemical Engineering and Biotechnology,Donghua University,Shanghai 201620,China

出　　处：《Nano Research》2024年第4期2814-2823,共10页纳米研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.12205225,U20A20257,and 51873166).

摘　　要：Oil pollution is a serious environmental and natural resource problem.Traditional adsorption materials for oil–water separation have limitations in terms of their preparation cost,reusability,and mechanical properties.Among the conventional adsorption materials,super-hydrophobic/super-lipophilic materials are easily contaminated by oil.In this study,polypropylene(PP)is used as a foam substrate to prepare an open-cell PP foam via hot pressing,supercritical CO_(2) foaming,and electron beam(EB)irradiation.The impact of EB irradiation dose on the open-cell content of PP foam can lead to cell wall rupture,resulting in an open-cell structure that enhances oil-water separation performance.At an absorbed radiation dose of 200 kGy,the PP foams exhibit optimal oil–water separation performance,cyclic compression stability,heat insulation,and preparation cost.The open-cell content of PP foam is increased to 86.5%,the adsorption capacity for diesel oil is 42.8 g/g,and the adsorption efficiency remains at 99.6%after 100 cycles of oil desorption in a complex pH environment.Meanwhile,cracks and nano-voids simultaneously promote the capillary action of oil,and the oil transport rate is 0.0713 g/(g·s).This study provides a new concept for the preparation of open-cell polymer foams that can meet the demand for high oil-absorption capacity under complex acid-base pH conditions.

关 键 词：open-cell polypropylene(PP)foam electron beam irradiation oil/water separation cyclic compression complex acid-base pH conditions 

分 类 号：TB383[一般工业技术—材料科学与工程]