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Study on the Structure and Properties of Cellulose-based Air Filter Material Controlled by Fibrillation
  
DOI:10.11980/j.issn.0254-508X.2018.01.005
Key Words:plant fiber  fibrillation treatment  freeze-drying  air filter material  Z orientation morphology
Fund Project:国家重点研发计划(2017YFB0308300);广西清洁化制浆造纸与污染控制重点实验室开放基金(KF201701);国家自然科学基金(31670593);陕西省重点研发计划项目(2017GY-140);东华大学国家重点实验室开放基金(LK1601)。
Author NameAffiliation
张美云1,3 1.陕西科技大学轻工科学与工程学院,中国轻工业纸基功能材料重点实验室,轻化工程国家级实验教学示范中心,陕西西安,7100213.东华大学纤维材料改性国家重点实验室,上海,201620 
马珊珊1 1.陕西科技大学轻工科学与工程学院,中国轻工业纸基功能材料重点实验室,轻化工程国家级实验教学示范中心,陕西西安,710021 
苏治平4 4.华南理工大学制浆造纸工程国家重点实验室,广东广州,510640 
杨 斌1 1.陕西科技大学轻工科学与工程学院,中国轻工业纸基功能材料重点实验室,轻化工程国家级实验教学示范中心,陕西西安,710021 
宋顺喜1,2,* 1.陕西科技大学轻工科学与工程学院,中国轻工业纸基功能材料重点实验室,轻化工程国家级实验教学示范中心,陕西西安,7100212.广西清洁化制浆造纸与污染控制重点实验室,广西南宁,530004 
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Abstract:In this research, a novel method for preparing biodegradable cellulose-based air filter materials based on freeze-drying 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 cellulose-based 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,three-dimensional spider-web like structure consisted of microfibrils and fiber back bones could improve interception capacity of air filters for particulate particles. Therefore, the environment-friendly cellulose-based air filter material was fabricated efficiently and controllably.
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