张美云 马珊珊 杨斌 宋顺喜�┞撑� 苏治平

摘 要：以木漿为原料，分别采用不同磨浆转数对木浆纤维进行原纤化处理，使其表面分丝帚化，再利用冷冻干燥技术保持纤维表面分丝状态而避免角质化，从而制备出可生物降解的纸基空气过滤材料。研究了不同程度原纤化处理对纸基空气滤材结构和性能的影响，探讨了原纤化处理对滤材Z向形貌的影响机理。结果表明，浆料浓度为1.5%、冷冻温度为-56℃、磨浆转数为50000 r时，纸基空气滤材具有较佳的过滤性能。

关键词：植物纤维；原纤化处理；冷冻干燥；空气滤材；Z向形貌

中图分类号：TS761.2

文献标识码：A

DOI：10.11980/j.issn.0254508X.2018.01.005

Study on the Structure and Properties of Cellulosebased Air Filter Material Controlled by Fibrillation

ZHANG Meiyun1，3 MA Shanshan1 YANG Bin1 SONG Shunxi1，2，* LU Peng2 SU Zhiping4

（1.College of Bioresources Chemical and Materials Engineering， China National Light Industry Key Lab of Paper Based

Functional Materials， National Demonstration Center for Experimental Light Chemistry Engineering Education，

Shaanxi University of Science & Technology， Xian， Shaanxi Province，710021；

2.Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control， Nanning，Guangxi Zhuang Autonomous Region， 530004；

3.State Key Lab for Modification of Chemical Fibers and Polymer Materials， Donghua University， Shanghai， 201620；

4.State Key Lab of Pulp and Paper Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640）

（*Email： 451613214@qq.com）

Abstract：In this research， a novel method for preparing biodegradable cellulosebased air filter materials based on freezedrying technique to remain fibrillation of the fiber surface and avoid hornification was presented. The plant fibers were chosen as the raw materials and treated by using grinding in different revolutions. The effect of various degree of fibrillation treatment on the structure and properties of cellulosebased air filter materials was investigated. Besides， the influence mechanism of fibrillation treatment on Z direction morphology of filters was also researched.The results demonstrated that the air filter materials behaved the superior filtering performance under the treatment condition of 50000 r grinding revolution、-56℃freezing temperature and 1.5%pulp concentration. Furthermore， the fibrillation treatment made more microfibrils remained on the surface of fibers and free hydroxyl groups exposed， which enhanced the interleaving force of fibers and uniformed the pore distribution among materials. In addition，threedimensional spiderweb like structure consisted of microfibrils and fiber back bones could improve interception capacity of air filters for particulate particles. Therefore， the environmentfriendly cellulosebased air filter material was fabricated efficiently and controllably.

Key words：plant fiber； fibrillation treatment； freezedrying； air filter material； Z orientation morphology

近年来，由于煤的燃烧和尾气排放等人为源以及火山爆发等一系列自然因素造成大气严重污染，尤其PM2.5（指大气中空气动力学当量直径小于或等于2.5μm颗粒物）污染物[1]引起了全国大范围内的雾霾天气，给人们日常出行和生活带来诸多不便，同时相关数据显示：PM2.5每增加10 μg/m-3会造成心肺疾病死亡率增加6%和肺癌死亡率增加8%[2]，因此研制绿色环保型空气过滤材料[34]是一项亟待解决的任务。目前，市场上常用的空气滤材材质多为玻璃纤维、活性炭纤维和聚酯纤维等，多为不可再生、难降解的石油基衍生物，导致废置滤材的处理会对环境产生巨大的污染负担。植物纤维作为一种广泛存在于大自然中的可再生生物质资源，来源广泛、价格低廉，因此，以植物纤维为原料取代合成聚合物制备空气滤材具有很大的发展潜力和应用价值。……