摘要
通常超亲水-水下超疏油材料又称"除水"材料,具有滤水、吸水而不吸油的特性。受鱼鳞表面的羟基磷灰石以及薄层黏液等亲水性物质导致其表面具有超亲水性的启发,以废弃牡蛎壳为原材料,以纳米羟基磷灰石和原始PU海绵为构筑基元,通过简单的溶液浸渍法过程在PU海绵表面成功构筑了HAP/PDA类牡蛎壳涂层,得到了超亲水-水下超疏油HAP/PDA超亲水/水下超疏油海绵。HAP的加入能能够调控HAP粒子生长为乳突结构,增大海绵表面粗糙度,从而提高海绵表面浸润性和油水分离性能。仅在重力作用下即可分离多种油水混合液,对各种油水混合液的分离效率可达95%以上,易于清洁且具有良好的可重复利用性和机械稳定性,在10次循环使用后分离效率并未明显降低。跟泵联合使用可用于大量含油废水的分离过程。
Super-hydrophilic-underwater super-oleophobic materials,also known as’water removal’materials,have the characteristics of filtering water and absorbing water but not oil.Inspired by the super-hydrophilic nature of the surface of fish scales such as hydroxyapatite and thin mucus,it uses discarded oyster shells as raw materials,and uses nano-hydroxyapatite and original PU sponge as the building blocks.The HAP/PDA type oyster shell coating was successfully constructed on the surface of the PU sponge through a simple solution dipping process,and the super-hydrophilic-underwater super-oleophobic HAP/PDA superhydrophilic/underwater super-oleophobic sponge was obtained.The addition of HAP can regulate the growth of HAP particles into a papillary structure,increase the surface roughness of the sponge,and thereby improve the surface wettability and oil-water separation performance of the sponge.A variety of oil-water mixtures can be separated only under the action of gravity,and the separation efficiency of various oil-water mixtures can reach more than 95%.It is easy to clean and has good reusability and mechanical stability.After 10 cycles of use the separation efficiency has not been significantly reduced.Used in combination with a pump,it can be used in the separation process of a large amount of oily wastewater.
作者
刘超
陈素华
杨周驰昊
郭荣
黄腾龙
LIU Chao;CHEN Su-Hua;YANG ZHOU Chi-hao;GUO Rong;HUANG Teng-long(School of Environmental and Chemical Engineering,Nanchang Hangkong University,Nanchang 330063,China)
出处
《南昌航空大学学报（自然科学版）》
CAS
2021年第3期77-85,共9页
Journal of Nanchang Hangkong University(Natural Sciences)
基金
江西省研究生创新专项(YC2019-S331)
