NaOH and Ba(OH).sub.2 Compound Catalyzed Phenol-Resorcinol-Formaldehyde Copolycondensation Resin Adhesive for Recombined Bamboo

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Publisher: Springer
Document Type: Report
Length: 289 words

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Byline: Yingfeng Zuo (1,2), Wenjie Liu (1), Junhua Xiao (1), Xianjun Li (1,2), Xing Zhao (1,2), Yiqiang Wu (1,2) Keywords: phenol-formaldehyde resin; NaOH; Ba(OH).sub.2; compound catalytic; resorcinol; recombined bamboo Abstract: In order to reduce the curing temperature, shorten the curing time of phenol- formaldehyde (PF) resin adhesive, and ensure the good water-solubility, NaOH and Ba(OH).sub.2 were used as compound catalysts. The influences of the adding time of Ba(OH).sub.2, the adding amount of NaOH, Ba(OH).sub.2 and resorcinol on the properties of adhesives were studied. The properties of NaOH catalyzed phenol-formaldehyde (PF) adhesive, NaOH and Ba(OH).sub.2 compound catalyzed PF adhesive, NaOH and Ba(OH).sub.2 compound catalyzed phenol-resorcinol-formaldehyde (PRF) adhesive, and the prepared recombinant bamboo with three kinds of adhesives were compared. The experimental results show that NaOH and Ba(OH).sub.2 compound catalyst not only shortens the curing time of PF adhesive, but also guarantees the suitable water solubility of adhesive. After copolycondensation with resorcinol, the curing time of adhesive is further shortened, the water solubility is improved obviously, and the highest bonding strength is obtained. Infrared spectrum analysis shows that the reaction activity point of NaOH and Ba(OH).sub.2 compound catalyzed PRF adhesive will increase, so that both the curing temperature and curing enthalpy decrease. Author Affiliation: (1) grid.440660.0, College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China (2) grid.440660.0, Hunan Provincial Collaborative Innovation Center for High-efficiency Utilization of Wood and Bamboo Resources, Central South University of Forestry and Technology, Changsha, 410004, China Article History: Registration Date: 22/04/2019 Received Date: 07/05/2018 Accepted Date: 21/07/2018 Online Date: 01/05/2019 Article note: Funded by the China Postdoctoral Science Foundation Funded Project (2015M572276), the Natural Science Foundation of Hunan Province, China (2016JJ3184) and the Hunan Major Science and Technology Projects (2011FJ1006)

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Gale Document Number: GALE|A584185456