SELF-ASSEMBLY IN POLYSACCHARIDE SYSTEMS
Cell walls in woody plants represent a complex composite structure comprised of cellulose, hemicelluloses, and lignin. The role of the hemicelluloses appears to be one of an interfacial modifier, bridging incompatible crystalline cellulose-rich domains and amorphous lignin-rich domains. This natural composite has superior fracture properties compared to synthetic wood-plastic composites. Our overall goal is to improve interfaces in composite systems of cellulose and thermoplastics fabricated from aqueous media in a wetlay process. A necessary first step is the design of water soluble molecules that will adsorb to cellulose and thermoplastics. Following a biomimetic approach, we design molecules that mimic the lignin-carbohydrate complex in cell wall biogenesis, pullulan cinnamates. surface plasmon resonance spectroscopy studies of pullulan cinnamate adsorption onto regenerated cellulose surfaces, and self-assembled alkane thiol monolayers (SAMs) with different end groups (hydroxyl vs. methyl) leads to the interesting conclusion that hydrophobic interactions are more important than hydrogen bonding for promoting adsorption.
Alan R.Esker Abdulaziz Kaya Zelin Liu Jae Hyun Sim
Virginia Tech,Department of Chemistry,Blacksburg,VA 24061,USA
国际会议
International Symposium on Polymer Physics(2008年国际高分子物理学术会议PP2008)
厦门
英文
240
2008-06-08（万方平台首次上网日期，不代表论文的发表时间）