首页 | 本学科首页   官方微博 | 高级检索  
     


Soybean meal-based adhesive enhanced by MUF resin
Authors:Qiang Gao  Sheldon Q Shi  Shifeng Zhang  Jianzhang Li  Xiaomei Wang  Wubin Ding  Kaiwen Liang  Jinwu Wang
Affiliation:1. College of Wood Sciences and Technology, Beijing Forestry University, Beijing 100083, China;2. Forest Products Department, Mississippi State University, Mississippi 39762
Abstract:Soybean meal flour, polyethylene glycol (PEG), sodium hydroxide (NaOH), and a melamine-urea-formaldehyde (MUF) resin were used to formulate soybean meal/MUF resin adhesive. Effects of the adhesive components on the water resistance and formaldehyde emission were measured on three-ply plywood. The viscosity and solid content of the different adhesive formulations were measured. The functional groups of the cured adhesives were evaluated. The results showed that the wet shear strength of plywood bonded by soybean meal/NaOH adhesive increased by 33% to 0.61 MPa after adding NaOH into the adhesive formulation. Addition of PEG reduced the viscosity of the soybean meal/NaOH/PEG adhesive by 91% to 34,489 cP. By using the MUF resin, the solid content of the soybean meal/MUF resin adhesive was improved to 39.2%, the viscosity of the adhesive was further reduced by 37% to 21,727 cP, and the wet shear strength of plywood bonded by the adhesive was increased to 0.95 MPa, which met the interior plywood requirements (≥0.7 MPa). The formaldehyde emission of plywood bonded by the soybean meal/MUF resin adhesive was obtained at 0.28 mg/L, which met the strictest requirement of the China National Standard (≤0.5 mg/L). FTIR showed using the MUF resin formed more ? CH2? group in the cured adhesive. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
Keywords:soybean adhesive  MUF  wet shear strength  viscosity  FTIR
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号