| Biography | |
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 Prof. Kaichang Li Oregon State University, USA |
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| Title: Research and Development of Novel Pressure Sensitive Adhesives from Vegetable Oils | |
| Abstract:
Pressure sensitive adhesives (PSAs) are widely used in pressure sensitive labels, tapes, stamps, Post-it notes and many other products. At present, PSAs are mainly derived from petrochemicals that are not renewable and not sustainable. In this presentation, we will disclose our new discovery that polyesters from polymerization of epoxy compounds and carboxylic acids can have superior PSA properties. The polyesters can be prepared from polymerization of epoxidized fatty acids such as epoxidized oleic acid, a bifunctional AB monomer containing a carboxylic acid group (A) and an epoxy group (B); polymerization of epoxidized soybean oils containing multiple epoxy groups and a dibasic acid such as dimer acids; or polymerization of epoxy resins containing two epoxy groups and a dibasic acid. Innovative methods for preparation of PSAs with superior properties have been successfully developed. The resulting PSAs have been characterized for their molecular structures, thermal stabilities, and viscoelastic properties. The peel strength, shear strength, tack, and aging stability of the resulting PSAs have also been evaluated and will be discussed in detail in this presentation. The relationships between chemical structures of the epoxy compounds and bibasic acids, and PSA properties have been extensively investigated and will be present and discussed in detail.
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| Biography:
Dr. Li obtained a BS in Applied Chemistry in 1984 and MS in Organic Synthesis in 1987 at South China University of Technology, P.R. China, and a PhD in Wood Chemistry at Virginia Polytechnic Institute and State University, Blacksburg, VA, 1996. He was a postdoc in Biochemistry and Molecular Biology at the University of Georgia at 1996-1999 and became an assistant professor in 1999 and was promoted to full professor in 2010 in Department of Wood Science and Engineering at Oregon State University. He has transferred his tenure home to School of Chemical, Biological, and Environmental Engineering, College of Engineering at Oregon State University since July 1, 2018.
Dr. Li has had tremendous success in development and commercialization of environmentally friendly products from renewable materials. For example, formaldehyde-free soy-based wood adhesives he invented have been used in commercial production of wood-based composite panels since 2004, which revolutionizes the wood-based composite industry. Dr. Li has over 30 patents and over 100 refereed journal papers. Dr. Li received a number of awards including the prestigious Presidential Green Chemistry Challenge in 2007 and Golden Goose award in 2017.
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