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Open AccessCommunication

Synthesis of Humin-Phenol-Formaldehyde Adhesive

1
Guangdong Provincial Key Laboratory of Distributed Energy Systems, Dongguan University of Technology, Dongguan 523808, China
2
Hawaii Natural Energy Institute, University of Hawaii, Honolulu, HI 96822, USA
3
Dongguan Cleaner Production Center, Dongguan University of Technology, Dongguan 523808, China
*
Author to whom correspondence should be addressed.
Polymers 2017, 9(8), 373; https://doi.org/10.3390/polym9080373
Received: 27 May 2017 / Revised: 11 August 2017 / Accepted: 14 August 2017 / Published: 18 August 2017
(This article belongs to the Collection Polymeric Adhesives)
Humins are low-value-added byproducts from the biomass acid hydrolysis process. In the present work, humins were first employed as a phenol replacement for synthesis of modified phenol-formaldehyde adhesives through a two-step process. In this process, humins were first utilized to obtain alkaline soluble products, mainly consisting of phenolics, through a hydrothermal process. The obtained alkaline soluble products then reacted with phenol and formaldehyde to produce humin-phenol-formaldehyde adhesive (HPFA). The physicochemical properties of HPFA, including viscosity, bonding strength, pH, free formaldehyde level, free phenol level and solid content, met the requirements of the GB/T 14732-2006 Chinese National Standard. View Full-Text
Keywords: humins; hydrothermal treatment; phenol-formaldehyde adhesive; hydrolysis humins; hydrothermal treatment; phenol-formaldehyde adhesive; hydrolysis
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Kang, S.; Fu, J.; Zhang, G.; Zhang, W.; Yin, H.; Xu, Y. Synthesis of Humin-Phenol-Formaldehyde Adhesive. Polymers 2017, 9, 373.

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