An eco-friendly wood adhesive from soy protein and lignin: performance properties

Luo, Jing; Luo, Jianlin; Yuan, Cheng; Zhang, Wei; Li, Jianzhang; Gao, Qiang; Chen, Hui

doi:10.1039/c5ra19232c

Cited by 103 publications

(83 citation statements)

References 21 publications

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“…Whereas soy protein has been extensively studied for this purpose (Chen et al, 2014;Luo et al, 2015;Qi et al, 2017), other vegetable proteins can also serve as wood adhesives (He & Wan, 2017;Santoni & Pizzo, 2013). Vegetable proteins are typically isolated from the seed meals by base extraction and acid precipitation.…”

Section: Introductionmentioning

confidence: 99%

Adhesive Strength of Pilot-Scale-Produced Water-Washed Cottonseed Meal in Comparison with a Synthetic Glue for Non-Structural Interior Application

He¹,

Chiozza²

2017

JMSR

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Water-washed cottonseed meal (WCSM) has been shown the potential to be used as renewable and environmentfriendly adhesives in wood products industry. Recently, WCSM was produced from defatted meal in a pilot scale. In this study, we initially compare the adhesive strength of the pilot-produced WCSM with that of a synthetic glue Vinavil 2259 L. WCSM may be used as the conventional D1 wood adhesives for nonstructural interior application per European standard EN204/205. Non-structural D3 type adhesives is more widely used in protected outside. Under the testing conditions, WCSM possessed very high heat resistance according to European standard EN14257 (WATT 91)-adhesive strength after 1 hour at 80°C. However, the dry strength (EN204/205) and water resistance (specimen were put in water for 4 days and then pulled in the dynamometer) of WCSM were lower than those of the synthetic glue Vinavil 2259 L. Blending WCSM with Vinavil 2259 L improved the water resistance of WCSM, allowing the classification of the WCSM adhesive as D3. Further work will be focused on the increase of solid content of the final adhesive slurries and the improvement of their water resistance.

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Section: Introductionmentioning

confidence: 99%

Adhesive Strength of Pilot-Scale-Produced Water-Washed Cottonseed Meal in Comparison with a Synthetic Glue for Non-Structural Interior Application

He¹,

Chiozza²

2017

JMSR

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“…Soy protein molecules are usually spherical in shape and contain several active groups, such as amino and carboxyl groups. These function groups are mostly hidden within these molecules; therefore, soy protein must be degraded before chemical crosslinking [24][25][26]. The active sites will be only accessible when spherical proteins are degraded into shorter segments, which render them more exposed [21].…”

Section: Structural Analysis Of Smuf Resinmentioning

confidence: 99%

Influence of Single/Collective Use of Curing Agents on the Curing Behavior and Bond Strength of Soy Protein-Melamine-Urea-Formaldehyde (SMUF) Resin for Plywood Assembly

Zhang

Zhou

et al. 2019

Polymers

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Soybean protein hydrolysate, melamine, urea, and concentrated formaldehyde were used to synthesize an environmentally friendly soybean protein-melamine-urea-formaldehyde (SMUF) co-condensation resin. (NH4)2SO4, (NH4)2HPO4, (NH4)2HPO4 + (NH4)2SO4, (NH4)2HPO4 + (NH4)2S2O8, and (NH4)2HPO4 + (NH4)2SO4 + (NH4)2S2O8 were employed as curing agents for SMUF resin. The curing and thermal behaviors of the SMUF resin were investigated using differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and scanning electron microscopy (SEM). The results revealed the following: (1) (NH4)2SO4 alone could not cure the SMUF resin completely; thus, the final shear strength accomplished plywood with the resin was low, and its water resistance was poor, while the adhesive section was loose and porous/brittle after curing. (2) (NH4)2HPO4 could be hydrolyzed to generate H+ and promote SMUF curing, but it could also form polyphosphoric acids, resulting in crosslinking reactions with SMUF in parallel; thereby, the curing properties were improved. (3) When (NH4)2HPO4 + (NH4)2SO4 + (NH4)2S2O8 were engaged collectively as curing agent, the shear strength, water resistance, and heat resistance of SMUF attained were the best possible whereas the curing temperature was decreased and the heat released by curing was elevated substantially, which signifies maximized extent of crosslinking was achieved. Further, the adhesive section exhibited mostly a crosslinking intertexture as demonstrated by means of SEM. Accordingly, this study may serve as a guide for the curing of amino resins, with low-molar ratio of formaldehyde to amine in adhesives, which are applied to plywood production.

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“…Furthermore, multiple drug libraries can be investigated on a single microwell platform. To this end, we have incorporated the microwell platform into a magnetic digital microfluidic device recently reported by our group, to investigate the fluorescence quenching of drug-protein complex [24]. Briefly, the device consists of top and bottom plates containing microwells and micropillars, respectively as shown in Fig.…”

Section: Integration Of Microwell Platform To Microfluidic Devicementioning

confidence: 99%

Analysis of drug–protein interaction in bio-inspired microwells

et al. 2019

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The study of binding of drug with protein is an important process in determining the activity and consequences of the drug. However, the current screening methods to investigate the drug-protein interaction are still pervaded with some disadvantages such as large requirement of sample volume and the need of expensive instrumentation. Here, we present a proof of concept for a method to study the interaction of different kinds of drugs with protein on a microwell array, to enable the understanding of pharmacokinetics in a fast and facile manner. To this end, we demonstrated the applicability of present method by analysing the interaction of fluorescently labelled bovine serum albumin (FITC-BSA) with sulphanilamide (SMO) and sulfamethoxazole (SMZ) drugs on lotus leaf-based microwells. The quenching mechanism of FITC-BSA in the presence of SMO and SMZ is visualized through time-lapse fluorescence imaging for the first time in femto-litre sized microwells. The binding parameters extracted from the present method are found to be in good agreement with the fluorescent spectroscopy measurements. The interaction between protein and drugs was further corroborated by molecular docking analysis and FT-IR technique. Finally, the bio-inspired microwell array was integrated into a magnetic digital microfluidic device to facilitate investigation of drug-protein interaction in power-free and cost-effective manner. A substantial decrease in sample volume and relatively short processing times when compared to other bulk methods makes the present method attractive. The results presented here therefore open up the possibility of rapid measurement of binding parameters in protein-ligand interaction studies in low-resource environments.

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An eco-friendly wood adhesive from soy protein and lignin: performance properties

Abstract: The aim of this study was to improve the water resistance of a soybean meal-based adhesive with a low-cost lignin-based resin (LR).

Cited by 103 publications

References 21 publications

Adhesive Strength of Pilot-Scale-Produced Water-Washed Cottonseed Meal in Comparison with a Synthetic Glue for Non-Structural Interior Application

Adhesive Strength of Pilot-Scale-Produced Water-Washed Cottonseed Meal in Comparison with a Synthetic Glue for Non-Structural Interior Application

Influence of Single/Collective Use of Curing Agents on the Curing Behavior and Bond Strength of Soy Protein-Melamine-Urea-Formaldehyde (SMUF) Resin for Plywood Assembly

Analysis of drug–protein interaction in bio-inspired microwells

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