Study of application of straw fermented residues in urea-formaldehyde resin

5^th World Congress on Materials Science & Engineering

June 13-15, 2016 Alicante, Spain

Fengqi Wang and Hui Yang

Technical Institute of Physics and Chemistry, China

Posters & Accepted Abstracts: J Material Sci Eng

Abstract :

About 700 million tons of straw are produced annually in China. The utilization of agricultural residues as raw material to prepare fuel ethanol has become an important aspect for the second generation biomass energy. In bio-refining process, a large number of straw fermented residues are produced. The main components of fermented residues are cellulose, hemicellulose, lignin, and ash. As the most abundant renewable phenolic compounds in nature, lignin can prepare lignin-based wood adhesives, but it did not achieve real commercial success due to complicated composition, dark color, complex extraction process, and lack of chemical reactivity. Lignin-based adhesives normally require excessively long curing times and higher curing temperatures during composite board production. So far, less than 20% of lignin has been utilized. Large quantities of bio-refinery lignin have been used as fuel for energy recovery. In order to cut down production cost and use lignocellulose more efficiently, the straw fermented residue should be developed and utilized. The use of the residues can reduce the pollution on environment, increase the economic benefit and promote the positive social benefit. The straw fermented residues, without pre-treatment by extraction and purification, were modified by sulfomethylation to increase the reactivity of lignin. Then they were used as additives of urea-formaldehyde resin. The experimental results showed that when the amount of additive is 5%-20%, the adhesive performance is improved significantly. The modified UF has a good application prospect because of its simple preparation process and lower free formaldehyde content.

Biography :

Email: wangfq@mail.ipc.ac.cn