报告题目：Cellulose Nanofibril Characterisation

　　报告人：Warren Batchelor，澳大利亚蒙纳士大学教授

　　报告时间：2025年5月12日10:00-11:30

　　报告地点：造纸D楼306会议室

　　邀请人：田君飞教授

　　主办单位：华南理工大学轻工科学与工程学院、先进造纸与纸基材料全国重点实验室

　　报告摘要：

　　Nanocellulose has been a well-established area of research for several decades; however, progress in its production, application, and utilization has been hindered by the lack of measurement standards. Measurement techniques often involve significant trade-offs; for example, optical fiber analysers offer quick results but fail to detect most fibers in a nanocellulose sample. On the other hand, scanning electron microscopy (SEM) is slower due to sample preparation and image analysis requirements but is generally capable of imaging most fibrillar elements in a sample. This talk will report on the work of an ISO task group within the pulp and paper committee, TC6, working on developing nanocellulose measurement standards within ISO. The first part of the talk will focus on the group’s work and the process of identifying priorities for standard method development, with a particular focus on size measurement techniques. The second part of the talk will be focus on cellulose nanofibril size measurements using SEM. Finally, some of the recent work on characterisation within my own research group will be introduced. These include a new method combining mercury intrusion porosimetry (MIP) with X-ray micro-computed tomography (μCT) for CNF film structure characterization and cellulose nanofibril aspect ratio measurement using rheology.

　　Professor Warren Batchelor is the Deputy Head of Department and Director of Education in the Department of Chemical and Biological Engineering, Monash University, Australian. He is the chair of the Standards Australia PK-019 committee, which develops standards for the pulp and paper industry and is the Australian representative on the international committee, TC6. His major research interests are in sustainable materials, with a particular interest in materials from cellulose nanofibers (CNFs), with contributions including: Recyclability of CNF films and of paper-polymer laminates; Life-cycle analysis of materials and processes; CNF characterisation methods including developing standards for CNFs; Paper mill biorefinery and CNF production; Methods for the rapid preparation of CNF sheets by spray coating and vacuum filtration; Development of renewable, recyclable, CNF barrier layers to displace petroleum-derived polymers in packaging; Nanoparticle-cellulose nanofiber composites for barrier applications, ultrafiltration membranes, antimicrobial functional layers and photocatalytic degradation of organic contaminants.