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Synthesis and properties of resol-type phenol-formaldehyde resins prepared from H2SO4- and HCl-catalyzed phenol-liquefied Cryptomeria japonica wood
-
Wen-Jau Lee
,
Chen-Ling Kang
Veröffentlicht/Copyright:
19. Juli 2011
Abstract
Wood of Cryptomeria japonica (Japanese cedar) was liquefied in phenol with H2SO4 or HCl as catalysts and used as raw materials to prepare phenol-formaldehyde (PF) resins. The curing behavior and adhesion properties of resins prepared were investigated. Wood liquefied with H2SO4 as a catalyst had better liquefaction effect than that with HCl; however, the reaction of resin synthesis was hard to control due to its quickly increasing viscosity. Differential scanning calorimetry analysis shows that PF resins prepared from HCl-catalyzed liquefied wood had higher reactivity than those of H2SO4-catalyzed wood. These PF resins were employed for manufacturing three-layer plywood. The wet bonding strength of plywood prepared with resins from HCl-catalyzed liquefied wood exceeded 0.7 MPa and fulfilled the requirement of the CNS 1349 standard.
Keywords: Cryptomeria japonica; curing behavior; differential scanning calorimetry (DSC); phenol-formaldehyde resins; phenol-liquefied wood; plywood
Received: 2010-11-16
Accepted: 2011-6-11
Published Online: 2011-07-19
Published in Print: 2012-01-01
©2012 by Walter de Gruyter Berlin Boston
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Artikel in diesem Heft
- Original Papers
- Novel paper sizing agents based on renewables. Part 5: characterization of maleated oleates by ozonolysis
- Polythiophene-cellulose composites: synthesis, optical properties and homogeneous oxidative co-polymerization
- The influence of extended mercerization on some properties of carboxymethyl cellulose (CMC)
- Minimizing the effect of undesirable reactions in ECF bleaching
- A rheological description of the water vapour sorption kinetics behaviour of wood invoking a model using a canonical assembly of Kelvin-Voigt elements and a possible link with sorption hysteresis
- Changes in chemistry, color, dimensional stability and fungal resistance of Pinus radiata D. Don wood with oil heat-treatment
- Improvement of dimensional stability of wood via combination treatment: swelling with maleic anhydride and grafting with glycidyl methacrylate and methyl methacrylate
- Synthesis and properties of resol-type phenol-formaldehyde resins prepared from H2SO4- and HCl-catalyzed phenol-liquefied Cryptomeria japonica wood
- Tack and shear strength of hybrid adhesive systems made of phenol-formaldehyde, dextrin and fish glue, and acrylic pressure-sensitive adhesive
- Properties of thermally modified medium-density fibreboards
- Carbonaceous structural changes of wood induced by microwave irradiation
- Development of DNA-based methods to identify CITES-protected timber species: a case study in the Meliaceae family
- Fungal biodegradation of genetically modified and lignin-altered quaking aspen (Populus tremuloides Michx.)
- The effect of fiber dimensions on fiber network activation and tensile strength
- Preparation of chitosan oligomers and characterization: their antifungal activities and decay resistance
- Cellular and topochemical characteristics of secondary changes in bark tissues of beech (Fagus sylvatica)
- Short Notes
- A study by X-ray photoelectron spectroscopy (XPS) of the chemistry of the surface of Scots pine (Pinus sylvestris L.) modified by friction
- Comparative termite resistance of 12 Malaysian timber species in laboratory tests
- Meetings
- 10.1515/HF.2011.185
Schlagwörter für diesen Artikel
Cryptomeria japonica;
curing behavior;
differential scanning calorimetry (DSC);
phenol-formaldehyde resins;
phenol-liquefied wood;
plywood
Artikel in diesem Heft
- Original Papers
- Novel paper sizing agents based on renewables. Part 5: characterization of maleated oleates by ozonolysis
- Polythiophene-cellulose composites: synthesis, optical properties and homogeneous oxidative co-polymerization
- The influence of extended mercerization on some properties of carboxymethyl cellulose (CMC)
- Minimizing the effect of undesirable reactions in ECF bleaching
- A rheological description of the water vapour sorption kinetics behaviour of wood invoking a model using a canonical assembly of Kelvin-Voigt elements and a possible link with sorption hysteresis
- Changes in chemistry, color, dimensional stability and fungal resistance of Pinus radiata D. Don wood with oil heat-treatment
- Improvement of dimensional stability of wood via combination treatment: swelling with maleic anhydride and grafting with glycidyl methacrylate and methyl methacrylate
- Synthesis and properties of resol-type phenol-formaldehyde resins prepared from H2SO4- and HCl-catalyzed phenol-liquefied Cryptomeria japonica wood
- Tack and shear strength of hybrid adhesive systems made of phenol-formaldehyde, dextrin and fish glue, and acrylic pressure-sensitive adhesive
- Properties of thermally modified medium-density fibreboards
- Carbonaceous structural changes of wood induced by microwave irradiation
- Development of DNA-based methods to identify CITES-protected timber species: a case study in the Meliaceae family
- Fungal biodegradation of genetically modified and lignin-altered quaking aspen (Populus tremuloides Michx.)
- The effect of fiber dimensions on fiber network activation and tensile strength
- Preparation of chitosan oligomers and characterization: their antifungal activities and decay resistance
- Cellular and topochemical characteristics of secondary changes in bark tissues of beech (Fagus sylvatica)
- Short Notes
- A study by X-ray photoelectron spectroscopy (XPS) of the chemistry of the surface of Scots pine (Pinus sylvestris L.) modified by friction
- Comparative termite resistance of 12 Malaysian timber species in laboratory tests
- Meetings
- 10.1515/HF.2011.185
