Effects of heat pretreatment of starch on graft copolymerization reaction and performance of resulting starch-based wood adhesive

Zheng, Xianyu; Cheng, Li; Gu, Zhengbiao; Hong, Yan; Li, Zhaofeng; Li, Caiming

doi:10.1016/j.ijbiomac.2016.12.028

Cited by 51 publications

(14 citation statements)

References 32 publications

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“…Most recent starch adhesive research focuses on replacement or extender for solid wood dispersion adhesives to reduce material cost and increase viscosity. 148,149 The studies on the use of starch as a wood adhesive have focused on corn starch in starch/polyvinyl alcohol, 150 starch/isocyanates 151 and starch/tannin 71 adhesives. Also, rice, rye, wheat and potato starch have been evaluated for use in particleboards.…”

Section: Starchmentioning

confidence: 99%

“…Starch can be denatured with NaOH to create less organized agglomerates that are more soluble in water and more easily penetrable to wood. 158 Zheng et al 149 have studied the effects of starch heat pre-treatment at 70, 80 and 90 C on gra copolymerization reaction with vinyl acetate (VAc) and the performance of the resulting starch-based wood adhesive (SWA). For low density particleboards, self-expanding cassava sour starch adhesive has been tested in a more recent study.…”

Section: Starchmentioning

confidence: 99%

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Development of sustainable bio-adhesives for engineered wood panels – A Review

et al. 2017

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Section: Starchmentioning

confidence: 99%

Section: Starchmentioning

confidence: 99%

Development of sustainable bio-adhesives for engineered wood panels – A Review

et al. 2017

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“…The tensile shear strength is a reliable test that is commonly used to evaluate the adhesion quality between two pieces of wood samples [ 16 ]. The shear strength of wood veneers bonded with polyurethane adhesives under dry and wet measuring conditions are presented in Figure 5 a,b.…”

Section: Resultsmentioning

confidence: 99%

“…Starch, as the main reserve source and energy storage of plants, has been extensively used in the food, textile, pharmaceutical, paper, and biofuel sectors [ 15 ]. However, the application of starch as a sole wood adhesive is limited due to high viscosity, poor storage stability, and insufficient bonding capacity [ 16 ]. The chemical modification of starch improves its hydrophobicity, mechanical performance, thermal stability, compatibility with other polymers, and bonding quality.…”

Section: Introductionmentioning

confidence: 99%

Polyurethane Wood Adhesives Prepared from Modified Polysaccharides

2022

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This study investigated the performance of polyurethane adhesives prepared with various combinations of wheat starch that had been modified by isophorone diisocyanate (MS), two polyol types (1,3-propanediol (PD) and glycerol (Gly)), native wheat starch (NS), and 4,4′-diphenylmethane diisocyanate (pMDI) at a NCO:OH weight ratio of 1:1. Two more adhesives were also synthesized with NS, PD, or Gly and pMDI blends and served as controls. The thermal behavior of the adhesives before and after the curing process, as well as their rheological performance and lap shear strength, were analyzed. Differential scanning calorimetry (DSC) showed a reduction in curing temperature and heat by adding MS. The thermal stability of the cured adhesives was slightly increased by MS addition. The viscosity of the adhesives that contained MS substantially increased at a linear ascendant ramp of shear, while the controls exhibited relatively low viscosity during the whole shear rate spectrum from 0.1 to 100 s−1. The tensile shear strength of wood veneers was also significantly increased by the incorporation of MS under both dry and wet measuring conditions. The maximum dry shear strength was obtained for the adhesive with Gly polyol and a higher content of MS and was comparable to the control adhesive with pMDI.

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“…However, a substitute for APEO is necessary since APEO has a negative impact on the environment [58]. Heat treatment of starch prior to the grafting reaction has been shown to enhance the grafting efficiency and the storage stability [59]. Sucrose-fatty acid esters, derived from renewable sources, have been used as surfactants added prior to grafting a high amylose-containing starch with vinyl acetate.…”

Section: Starchmentioning

confidence: 99%

Green Binders for Wood Adhesives

Norström¹,

Demircan²,

Fogelström³

et al. 2018

Applied Adhesive Bonding in Science and Technology

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Today's society relies heavily on glued wood products for constructions, furniture, and floorings, for example. Essentially, all adhesives on the market are based on fossil-based resources, and many also contain formaldehyde to yield sufficient reactivity and adhesive performance. Formaldehyde is soon to be banned from consumer goods in Europe, due to its carcinogenic and allergenic features. With the rapidly growing societal environmental awareness, it becomes evident that it is crucial to seek greener, more sustainable alternatives. There is nothing new to this idea; on the contrary, prior to the advent of synthetic polymers, a range of biopolymers such as proteins and starch, were successfully used. However, since adhesives based on synthetic polymers were found to perform better, especially regarding the water resistance, the naturally sourced adhesives have had a subordinate role up until recently. The growing interest for using bio-polymers from renewable resources, such as wood/forest, corn, and cereals have spurred significant R&D developments toward the use of bio-polymers in green wood adhesives. The scope of the present chapter is to summarize, in short, some of the most recent scientific literature regarding the development of green adhesives.

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Effects of heat pretreatment of starch on graft copolymerization reaction and performance of resulting starch-based wood adhesive

Cited by 51 publications

References 32 publications

Development of sustainable bio-adhesives for engineered wood panels – A Review

Development of sustainable bio-adhesives for engineered wood panels – A Review

Polyurethane Wood Adhesives Prepared from Modified Polysaccharides

Green Binders for Wood Adhesives

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