水下超疏油纸基材料的制备及其油水分离性能  

Underwater superoleophbic paper-based materials and their oil-water separation performance

作　　者：楼燕铃 奚建锋 蒋珊 吴伟兵[1,2] LOU Yanling;XI Jianfeng;JIANG Shan;WU Weibing(Jiangsu Co-Innovation Center for Efficient Processing and Utilization of ForestResources,Nanjing Forestry University,Nanjing 210037,China;State Key Laboratory of Biobased Material and Green Papermaking,Qilu Universityof Technology,Jinan 250353,China)

机构地区：[1]南京林业大学,江苏省林业资源高效加工利用协同创新中心,南京210037 [2]齐鲁工业大学,生物基材料与绿色造纸国家重点实验室,济南250353

出　　处：《林业工程学报》2021年第5期82-88,共7页Journal of Forestry Engineering

基　　金：国家重点研发计划(2017YFD0601005);生物基材料与绿色造纸国家重点实验室开放基金(KF201804)。

摘　　要：以阔叶浆为绿色可降解的木质纤维原料,结合打浆处理和马来酸酐(MA)以及次磷酸钠(SHP)改性,制备出具有低成本、高湿强度、良好油水分离性能和可重复使用的纸基功能材料。研究结果表明:打浆处理不仅提高了纤维的比表面积以及相互之间的交联程度,同时还实现了对纸页孔结构的优化调控;以低成本的马来酸酐为表面亲水改性剂和增湿强剂,MA/SHP改性同时提高了纸页的羧基含量和湿强度,纸页的湿强度提高到原来的4倍,最大湿强度可达其干强度的48%。改性后的纸页由于亲水性的提高,对大豆油、石油醚以及正己烷的水下油接触角均大于150°,具有水下超疏油的性质,同时油水分离效率大于99.2%。打浆度60°SR、MA质量分数8%的样品(P60-8MA)对大豆油、石油醚以及正己烷的乳化油和油水混合物都具有高的分离效率(>99.2%),经循环使用10次后,P60-8MA油水分离效率始终保持在99.0%以上,通量为236~247 L/(m^(2)·h)。该高湿强度、孔径可调控的水下超疏油纸基功能材料解决了传统处理方式效率低下、处理材料难以回收等问题,实现了木质纤维的高值化利用,在含乳化油废水处理中具有广阔的应用前景。In this paper,underwater superoleophbic paper-based materials with low cost,high wet strength,good oil-water separation performance and reusable features were prepared using hardwood pulp as a green and degradable lignocellulosic material via a simple and green papermaking process.The maleic anhydride/sodium hypophosphite was selected as green modifiers to improve the wet strength and carboxyl content of the paper,and the pore structure was controlled by the beating treatment.The results showed that the beating treatment improved the specific surface area and crosslinking degree of the fibers as well as optimized the pore structure of the paper sheets.Using the low-cost maleic anhydride as the surface hydrophilic modifier and humidifying agent,the modification of the maleic anhydride/sodium hypophosphite significantly increased the carboxyl content and wet strength.The wet strength of the paper was increased to 4 times of the original one,and the maximum wet strength can reach 48%of its dry strength.Due to the improvement of hydrophilicity,this series of paper sheets showed underwater superoleophbicity,and the underwater contact angles of the soybean oil,petroleum ether,and n-hexane were all higher than 150°.When being used for separating emulsified oils,the oil-water separation efficiency was more than 99.2%.P60-8MA(beating degree 60°SR,8%mass fraction of maleic anhudride)had high separation efficiency for the emulsified oil and oil-water mixture of the soybean oil,petroleum ether,and n-hexane(>99.2%).After recycling for 10 times,the paper sheets still retained a high separation efficiency(>99.0%),and the flux was between 236 and 247 L/(m^(2)·h).This type of paper-based functional materials with high wet strength,and adjustable pore size solved the problems of low efficiency of traditional treatment methods and difficult recovery of treatment materials and realized the high-value utilization of wood fibers.It has a broad application prospect in the treatment of wastewater containing emulsified oils.

关 键 词：纸基功能材料 纸页湿强度 水下超疏油 孔径调控 油水分离 阔木浆 

分 类 号：TQ35[化学工程]