Study on Modification of UFRA by Enzyme Hydrolysis Prepared Oxidized Starch

Abstract:

In this work, we concentrate on the preparation of oxidized starch modification reagent by enzymatic hydrolysis pretreatment, preparation of the urea-formaldehyde resin with low toxicity. The performance of modified urea-formaldehyde resin depend on the oxidation degree of oxidized starch and whether using enzymatic hydrolysis pretreatment or not. 100-PH9-HOS(the starch enzymatic hydrolysis then oxidized in 100°C with pH 9) synthetized modified urea-formaldehyde resin (100-PH9-HOS-UF) only with a free formaldehyde content of 0.14%, the lowest formaldehyde emission of 0.6078mg/L. Infrared spectroscopy test results show that samples at 3350cm-1 p-hydroxyl hydrogen bonds of association half-peak width minimum hefeng, amino-hydroxy hydrogen bond of association that samples are the weakest and with maximum cross-linking degrees; The modified urea-formaldehyde resin by oxidized starch curing properties of impact factors show that: the deeper drgree of oxidation, the higher curing temperature and the lower enthalpy.

• Periodical: Applied Mechanics and Materials (Volumes 268-270)
• Pages: 574-579
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.268-270.574
• Online since: December 2012
• Authors: Rui Hang Lin, Xiao Bo Wang, Xiao Feng Zhu, Zhen Zhong Gao
• Keywords: DSC, Enzyme Hydrolysis, FT-IR, Oxidized Strach, UF Resin

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