报告题目：Exploring woodnanostructure for sustainable lignocellulosic aerogels

报 告 人：李媛媛（Yuanyuan Li，瑞典皇家理工学院副教授）

报告时间：2025年11月27日（星期四）上午9:30—11:00

报告地点：轻工科学与工程学院D楼306会议室

邀 请 人：方志强 研究员

主办单位：先进造纸与纸基材料全国重点实验室、轻工科学与工程学院

报告摘要：

Aerogels areattractive in various applications ranging from aerospace to energy storage dueto low density and high specific surface area. Successes have been achieved foraerogel formation from wide range of materials. Among them, lignocellulosicaerogels provide additional sustainability benefits. Mainstream strategy toobtain lignocellulosic aerogels is bottom-up approach, disintegrating wood intonano building blocks (e.g. nanocellulose) followed by reassembling intoaerogels. Top-down approach is an alternative by directly using wood while thehierarchical structure is largely preserved, and in-situ modified. The step ofnano building blocks extraction is eliminated which is beneficial for scalablefabrication.

 In this talk, wood aerogel, a hierarchicalnano porous structure with cellulosic nanofibril network filling the emptylumen space, will be reported. This type of cellulosic aerogel combined highmechanical strength and high specific surface area. The methodologiesdevelopment to obtain wood aerogel will be explained. The structureunderstanding of the aerogels will be presented.

报告人简介：

Yuanyuan Li, anassociate professor, Head of Biocomposites Division at the Department of Fibreand Polymer Technology, KTH Royal Institute of Technology, Sweden and a PI inthe Wallenberg Wood Science Center. She received her PhD degree in 2014 fromNanjing Forestry University. During her doctoral studies, she visitedUniversity of Maryland under the supervision of Prof. Liangbing Hu. Prior tojoin KTH as an Assistant Professor in 2020, she was a postdoc in KTH from 2015.In 2024, she was promoted to Associate Professor.

Yuanyuan’sresearch mainly focuses on wood nanoscience and nanotechnology development andfunctional biocomposites. Her idea is advanced cellulosic nanomaterialscomposites design, not by the common bottom-up approach exemplified bynanocellulose, but by eco-friendly top-down approaches starting with wood. Thehierarchical structure and porosity as well as existing cellulose nanofibrilorientation in wood are utilized.