Effects of montmorillonite addition on the performance of starch-based wood adhesive

Li, Zhaofeng; Wang, Jian; Li, Caiming; Gu, Zhengbiao; Cheng, Li; Hong, Yan

doi:10.1016/j.carbpol.2014.08.106

Cited by 54 publications

(31 citation statements)

References 32 publications

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“…Polyvinyl alcohol (PVA) is a water-soluble biodegradable polymer. It possesses a high crystalline structure [13]. Physical and chemical properties of PVA depend on the synthesis condition and degree of hydrolysis of the polymer [14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Effect of glutaraldehyde on thermal and mechanical properties of starch and polyvinyl alcohol blends

Gadhave

Mahanwar

Gadekar

2019

Designed Monomers and Polymers

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The aim of this study is to analyze the various compositions of polyvinyl alcohol (PVA) and starch (S) blends. The blends have been cross-linked with glutaraldehyde to enhance its properties. The hydroxyl groups of PVA and starch react with glutaraldehyde via formation of acetal bonds hence crosslinking could take place. The cross-linking of glutaraldehyde is observed with the help of various analytical methods such as differential scanning calorimetry (DSC) and Fourier-transform infrared spectroscopy (FTIR). The presence of two highly reactive alpha protons makes glutaraldehyde more reactive and acidic in nature. The higher reactivity of glutaraldehyde, at higher dosages leads to reduction in H-bonding of PVA and starch. The cross-linked blends showed better thermal and mechanical properties. Viscosity, tensile strength, pencil hardness, and ultimate stress were evaluated to estimate the changes due to cross-linking. It was observed that the mechanical properties are directly proportional to the amount of starch as the starch hydroxyl groups are easily accessible for the cross-linking reaction. The cross-linked blend showed better cohesion between its chains, thereby increasing the glass transition temperature. It was reflected in the subsequent increase in tensile strength properties.

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Section: Introductionmentioning

confidence: 99%

Effect of glutaraldehyde on thermal and mechanical properties of starch and polyvinyl alcohol blends

Gadhave

Mahanwar

Gadekar

2019

Designed Monomers and Polymers

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“…Nano-layered silicates have been reported to potentially improve adhesive performance with polyurethane, polyvinyl acetate, poly (ethylene glycol) acrylate, and starch because of the high aspect ratio and the presence of unsaturated chemical bonds on the nano surfaces [13][14][15][16]. Many studies have characterized the molecular interaction and structure of soy protein/clay composites in plastic and film applications with the improved mechanical and barrier properties [10,17,18], but only few works have focused on adhesion properties of soy protein affected by nano clay.…”

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confidence: 99%

Development of High‐Strength Soy Protein Adhesives Modified with Sodium Montmorillonite Clay

Wang

Sun

2016

J Americ Oil Chem Soc

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This study investigated the high strength of a soy protein adhesive system with good flowability at high protein concentration. Sodium montmorillonite (Na MMT), the most widely used silicate clay, was incorporated into viscous, cohesive soy protein adhesives at concentrations ranging from 1 to 11 % (dry basis, w/w). Hydroxyethyl cellulose was used as a suspension agent to stabilize the soy protein and nano clay to be the dispersion system. The interaction between soy protein and Na MMT was characterized by XRD, FTIR, Zeta potential and DSC. Results indicated that soy protein molecules were adsorbed on the surface of the interlayer of Na MMT through hydrogen bonding and electrostatic interaction. The soy protein/Na MMT adhesives had the intercalation structure with Na MMT contents ranging from 1 to 11 %. Adhesion strength, specifically wet adhesion strength, of soy protein adhesives at isoelectric point (pI) was significantly improved by the addition of Na MMT. It is believed that the physical cross‐linking reactions between soy protein and Na MMT mainly contribute to the improved adhesion performance of soy protein adhesives. Wet adhesion strength increased from 2.9 MPa of control soy protein adhesive to 4.3 MPa at 8 % Na MMT. An increase of pH beyond pI value resulted in decreased adhesion strength due to increased surface charges of soy protein and slightly reduced affinity of soy protein on the nano clay surface.

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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

BioResources

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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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Effects of montmorillonite addition on the performance of starch-based wood adhesive

Cited by 54 publications

References 32 publications

Effect of glutaraldehyde on thermal and mechanical properties of starch and polyvinyl alcohol blends

Effect of glutaraldehyde on thermal and mechanical properties of starch and polyvinyl alcohol blends

Development of High‐Strength Soy Protein Adhesives Modified with Sodium Montmorillonite Clay

Preparation and Properties of Cassava Starch-based Wood Adhesives

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