4.7 Article

Synthesis of Humin-Phenol-Formaldehyde Adhesive

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POLYMERS
卷 9, 期 8, 页码 -

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MDPI
DOI: 10.3390/polym9080373

关键词

humins; hydrothermal treatment; phenol-formaldehyde adhesive; hydrolysis

资金

  1. National Natural Science Foundation of China [21606045]
  2. Science and Technology Planning Project of Guangdong Province, China [2017A010103047]
  3. Natural Science Foundation of Guangdong Province of China

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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.

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