Speaker: Prof. Atsushi Takahara（Kyushu University）

Location: C3-c204, GuangzhouInternational Campus,SCUT 

Lesson 1

Lecture time: January 8, 2025, 9:50-10:50 AM

Abstract:

Wettabilityof Solid Surfaces and Functional Properties

Understanding the wettability of solidsurfaces is essential for a wide range of scientific and engineeringapplications, including coatings, adhesives, lubrication, and biomaterials.This lecture will introduce the concept of wettability, explore methods of itsmeasurement, and examine its impact on the functional properties of solidmaterials. We will begin by discussing the fundamental principles of contactangle and surface energy, which govern the interaction between liquids andsolid surfaces. The lecture will also cover key factors that influencewettability, such as surface functional groups, roughness, and environmentalconditions. Additionally, the role of hydrophilic and hydrophobic surfaces inmodulating the behavior of functional materials will be addressed.

Lesson 2

Lecture time: January 8, 2025, 11:00-12:00 AM

Abstract:

Polymer Degradation and Microplastic Problems

Plastic fragments smaller than 5 mm are classified as microplastics (MPs), which contribute to the pollution of natural ecosystems through various sources, including cosmetics, clothing, food packaging, and industrial activities. MPs have a significant negative impact on the environment. To address this issue, it is essential to adopt a scientific approach to better understand the processes involved in the formation of MPs. In this presentation, we will examine three common degradation mechanisms of polymeric materials from a surface chemistry perspective: chemical degradation, biodegradation, and mechanical degradation. These processes can occur consecutively or simultaneously in improperly managed polymeric materials, ultimately leading to their breakdown and release into the environment. This presentation aims to provide valuable insights into controlling the degradation of polymeric solids and developing eco-friendly polymers, promoting a more sustainable future.

Biography: 

Atsushi Takahara earned his D.Eng. (1983) in the field of polymer science from Kyushu University. He was a full professor of Kyushu University from 1999 to 2021. He has been a project leader of JST/ERATO Takahara Soft Interfaces Project (2008-2014), a director of Institute for Materials Chemistry and Engineering, Kyushu University (2013-2017).  He is currently a senior editor of Langmuir (2016-). He received several awards including Polymer Science Award　(2003), Rheology Award(2013), APS Fellow (2014),  ACS Fluoropolymer 3M Award(2014), RSC Fellow(2016), SPSJ Award for Outstanding Achievement on Polymer Science and Technology(2018), Neutron Science Award(2020), and Award for Outstanding Achievement on Adhesion Science and Technology(2024). He was a president of Society of Polymer Science (2014-2016) and a president of Materials Research Society, Japan (2017-2019). He has published more than 640 peer reviewed papers.  His research interests are focused on advanced soft material science such as polymer surface and interface, polymer nanocomposites, polymer degradation and stability, and quantum beam science applied to soft matter.