Bonding strength and water resistance of starch-based wood adhesive improved by silica nanoparticles

Wang, Zhenjiong; Gu, Zhengbiao; Hong, Yan; Cheng, Li; Li, Zhaofeng

doi:10.1016/j.carbpol.2011.04.003

Cited by 137 publications

(58 citation statements)

References 16 publications

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“…Nanoparticles can approach unsaturated bonds of copolymer macromolecules and interact with the electrons of the unsaturated bonds (Friedlander 1999), resulting in a reduced surface tension. The evenly dispersed CPNE in the fiber-based material likely interact with the hydroxyl groups of the fibers (Wang et al 2011). This result also confirmed that the sample was more waterproof when the material had a larger contact angle and lower surface tension.…”

Section: Surface Tension Of Uldfssupporting

confidence: 73%

Effect of Chlorinated Paraffin Nanoemulsion on the Microstructure and Water Repellency of Ultra-Low Density Fiberboard

Cai

Niu

et al. 2016

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This work describes a water repellent ultra-low density fiberboard (ULDF) prepared by chlorinated paraffin nanoemulsion (CPNE). Compared with the untreated ULDF, the contact angle of ULDF treated with 150 mL of CPNE increased from 40° to 134°, while its apparent surface free energy decreased from 24.19 mN/m to 10.06 mN/m. Moreover, the water absorbance of ULDF treated with CPNE decreased from 88.2% to 24% in the first hour. The improved hydrophobicity and hygroscopicity of ULDF was supported by the presence of a film on the surface of fibers, as observed by environmental scanning electron microscopy. The occurrence of chlorine and the chemical structure changes in ULDF before and after CPNE treatment were also confirmed by X-ray photoelectron spectroscopy analysis and Fourier transform infrared spectroscopy respectively. This ULDF with enhanced water repellency is a promising insulation material.

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Section: Surface Tension Of Uldfssupporting

confidence: 73%

Effect of Chlorinated Paraffin Nanoemulsion on the Microstructure and Water Repellency of Ultra-Low Density Fiberboard

Cai

Niu

et al. 2016

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“…It is manifested by the increase in modulus of elasticity, modulus of rupture, internal bond, impact strength as well as thermal and chemical resistance. It is also commonly known that fumed silica enhances thermal, rheological and mechanical properties of various types of adhesives, such as thermoplastic polyurethane (Vega-Baudrit et al 2006), poly(vinyl acetate) (PVAc) (Bonnefond et al 2013), urea-formaldehyde (Leonovich et al 2002;Lin et al 2006;Roumeli et al 2012;Dukarska 2013) and starch-based wood adhesives (Wang et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Fumed silica as a filler for MUPF resin in the process of manufacturing water-resistant plywood

Dukarska

Czarnecki

2015

Eur. J. Wood Prod.

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This work examines the effect of applying fumed silica with nanoscopic-size particles as a filling material for melamine-urea-phenol-formaldehyde (MUPF) resin in the process of manufacturing water-resistant plywood. Moreover, this paper investigates the possibility of reducing the amount of MUPF resin mixture used in the process of gluing veneer sheets. Based on the investigations into the reactivity, viscosity and durability of MUPF resin mixture containing various amounts of nanofiller, it was found that the optimum amount of silica that can make the resin suitable for gluing sheets of veneer amounts to 2 PBW per 100 PBW of MUPF resin. The gluing properties for thus mixed resin were determined by measuring the contact angle and determining the parameters of its derivatives, which are an additional criterion for evaluating the gluing properties. The thermal stability was tested with simultaneous use of TG-DSC analysis. The experimental plywood manufactured using optimal nano-SiO 2 was tested in terms of bond quality and mechanical properties according to appropriate standards. The investigations prove that it is possible to apply fumed silica as a filling material for the resin in the process of manufacturing water-resistant plywood. Introducing the above-mentioned amount of fumed silica into the resin makes it possible to increase the activation energy of the cross-linking process of MUPF resin and to optimize the process of gluing the sheets of veneer. Moreover, it is also possible to produce plywood of the required water-resistance with the amount of adhesive mixture reduced by 30 %.

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“…SWA can be prepared by grafting an olefin monomer (VAc or VAc + BA) onto starch granules; the monomer then reacts with the OH group of the glucose unit to produce an ether linkage (Wang et al 2012Zhang et al 2015). Emulsifiers (Wang et al 2013a;Li et al 2014), urea (Wang et al 2013b), and nanomaterials (Wang et al 2011;Li et al 2015) have been used to improve the properties of SWA. Nevertheless, studies have mostly used normal or waxy corn starch as a raw material to prepare SWA; other kinds of starch have not yet to be fully explored.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Properties of Cassava Starch-based Wood Adhesives

Xu¹,

Jian-ping²,

Wang³

2016

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A biodegradable, environmentally friendly starch-based wood adhesive with cassava starch as a raw material and butyl acrylate (BA) as a comonomer was synthesized. Results revealed that this cassava starchbased wood adhesive (SWA) was more stable than corn starch-based wood adhesive, and its bonding performance was close to that of commercial PVAc emulsion, even after 90 days of storage. Further analysis found that the improved stability of the adhesive could be attributed to its low minimum film forming temperature (MFFT) and glass transition temperature (Tg) of cassava starch. Moreover, the amount of total volatile organic compounds (TVOCs) emitted by the cassava starchbased wood adhesive were much lower than the Chinese national standard control criteria. Therefore, cassava SWA might be a potential alternative to traditional petrochemical-based wood adhesives.

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Bonding strength and water resistance of starch-based wood adhesive improved by silica nanoparticles

Cited by 137 publications

References 16 publications

Effect of Chlorinated Paraffin Nanoemulsion on the Microstructure and Water Repellency of Ultra-Low Density Fiberboard

Effect of Chlorinated Paraffin Nanoemulsion on the Microstructure and Water Repellency of Ultra-Low Density Fiberboard

Fumed silica as a filler for MUPF resin in the process of manufacturing water-resistant plywood

Preparation and Properties of Cassava Starch-based Wood Adhesives

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