Synthesis of Humin-Phenol-Formaldehyde Adhesive
نویسندگان
چکیده
منابع مشابه
Synthesis of Humin-Phenol-Formaldehyde Adhesive
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 alk...
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Thirteen nonacidic waterborne preservatives were in vestigated for their compatibilitywith phenol-formaldehyde adhesive on aspen veneer treated with the preservatives to retentions of 0.2, 0.4, and 0.6 pcf. Of these preserva tives, didecyl dimethyl ammonium chloride (DDAC),DDAC with copper, DDAC with carbamate (DDACCA),sodium fluoride,and ammonium hydrogen difluoridedid not inter fere with a...
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To prepare a low-formaldehyde soy-based adhesive with good water resistance, phenol-formaldehyde modified with glutaraldehyde (PFG) with lower free phenol and free formaldehyde contents was used to cross-link the soy-based adhesive. The results showed that the mechanical properties and water resistance of plywood prepared with soy-based adhesive with PFG was better than that of plywood with the...
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Wood liquefaction was conducted at a 2/1 phenol/wood ratio in two different reactors: (1) an atmospheric three-necked flask reactor and (2) a sealed Parr reactor. The liquefied wood mixture (liquefied wood, unreacted phenol, and wood residue) was further condensed with formaldehyde under acidic conditions to synthesize two novolac-type liquefied wood/phenol/formaldehyde (LWPF) resins: LWPF1 (th...
متن کاملUrea-formaldehyde Adhesive Resins*
Approximately 1 million metric tons of urea-formal-dehyde resin are produced annually. More than 70% of this urea-formaldehyde resin is used by the forest products in-*This information was written and prepared by a U.S. Government employee on official time and it is, therefore, in the public domain and not subject to copyright.
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ژورنال
عنوان ژورنال: Polymers
سال: 2017
ISSN: 2073-4360
DOI: 10.3390/polym9080373