由我校bat365在线平台官方网站、党委研究生工作部主办，橡塑模具国家工程研究中心承办的研究生“名师名家讲坛”，将邀请香港科技大学沈曦博士做学术报告。欢迎广大师生积极参加！

报告时间：2022年11月2日下午2:30

线上参会：腾讯会议ID 646-761-210

报告主题：聚合物纳米复合材料的跨尺度设计和可控制备在被动热管理中的应用

报告人：香港科技大学沈曦

报告人简介：

沈曦博士，香港理工大学航空及民航工程学系助理教授、航空工程学(荣誉)工学士学位课程主任。于同济大学和香港科技大学分别获得学士及博士学位，在加入香港理工大学前曾任香港科技大学研究助理教授、德国凯泽斯劳滕工业大学复合材料研究所洪堡学者。沈博士主要从事新型低维纳米材料在高分子复合材料中的可控合成及多功能应用的研究。主持香港研究资助局和创新科技署多项研究课题，在材料、纳米科学领域顶级期刊如Nature Communications，Progress in Materials Science，Advanced Functional Materials，Nano-Micro Letters，Nano Letters等发表论文50多篇，SCI引用超过4500次，申请专利2项。获得包括Hong Kong PhD Fellowship (2011-2015)、Tsai Award（2015）、Humboldt Research Fellowship（2017-2018）、Editor's Top Reviewer Award of Composites Part A (2020)等多项学术奖励。

报告摘要：

Multifunctional polymer nanocomposites consisting of nanoscale reinforcements embedded in a polymer matrix underpin many emerging technological fields. two-dimensional (2D) nanofillers, such as graphene, boron nitride nanosheets, MXene, having excellent thermo-optical properties constitute an intriguing class of functional fillers for polymer nanocomposites. However, fully translating the excellent properties of nanofillers to bulk composites is not trivial. The challenges stem from a lack of thorough understanding of important factors at different length scales coupling the intrinsic properties of nanofillers to the bulk properties of composites, as well as difficulties in the proper control of nanofiller orientation in a polymer matrix.

In this talk, I will discuss how the above challenges are tackled by using a combined multiscale modeling and experimental approach. The multiscale modeling, including molecular dynamics (MD) simulations and analytical models, contributes to the understanding of interfacial behaviors and their effects on bulk thermal conductivities of composites, providing guidance to the multiscale structural design. Using the design principles derived from the modeling, advanced manufacturing techniques based on freeze-casting are developed to achieve controlled assembly of nanofillers in a polymer matrix. Through these holistic efforts, polymer nanocomposites containing architected nanofillers of graphene, boron nitride nanosheets, and MXene achieve tailored electrical, thermal, and optical properties, imparting practical passive thermal management capabilities for thermal interface materials, thermal insulation, and solar-powered water evaporation.

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2022年10月28日