Investigation of modified cottonseed protein adhesives for wood composites

Cheng, H. N.; Dowd, Michael K.; He, Zhongqi

doi:10.1016/j.indcrop.2013.02.021

Cited by 82 publications

(71 citation statements)

References 22 publications

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“…The adhesive slurries exampled in this protocol are simply the defatted seed meal product and water. Various adhesive formulations can be reached by addition of testing reagents (such as sodium dodecyl sulfate, sodium bisulfite or tung oil) 5,6,23 and/or changes in mixing conditions (such as pH, ratio of solid and water) 3,24,25 . Adjustment of the adhesive formulation is also needed if the rheological properties of the adhesive slurry are not suitable for appropriate application to the wood strips.…”

Section: Discussionmentioning

confidence: 99%

“…For this reason, testing replicates from 3 -10 have been reported in literature. Due to these variation and other known and unknown factors, it is not uncommon to see large standard deviations (>10%) observed in the shear strength measurements, as in Table 1 and the literature [6][7][8]12,25 , and this may undermine some statistical analysis at P ≤ 0.05. Thus, some papers simply present the data with standard deviations, then compare and discuss them without statistical significance analysis (e.g., 7,8,12,26 ).…”

Section: Discussionmentioning

confidence: 99%

“…This protocol presents two common methods used for evaluation of the water resistance: (1) wet strength-the shear strength of the bonded specimens measured immediately after soaking in tap water at 23 °C for 48 hr, which was based on ASTM Standard D1151-00 11 ; and (2) soaked strengththe shear strength of the bonded specimens measured after soaking -drying cycles, which was similar to the Chinese National Standard for Plywood (GB/T 17657-1999 ASTM Standard D1151-00 11 . Some papers report wet strength only 5 , or soaked strength only 6 , or both 11 . It is also worth pointing out that the soaked strength in this protocol is measured after two cycles of soaking at 63 °C for 4 hr and drying at RT O/N (18 -20 hr) 6 .…”

Section: Discussionmentioning

confidence: 99%

“…In the past two decades, this trend has reversed with renewed interest in the use of materials that are renewable, biodegradable, and more environmentally acceptable. These natural resources include, but are not limited to, soy protein [3][4][5] , cottonseed protein 6 , rice bran 7 , wheat gluten 8 , distillers grain protein 9 , canola protein and oil [10][11][12] , lignin from sorghum and sugar cane bagasse 13,14 , and polysaccharides derived from shrimp shells 15 .…”

Section: Introductionmentioning

confidence: 99%

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Preparation and Testing of Plant Seed Meal-based Wood Adhesives

Chapital

2015

JoVE

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Recently, the interest in plant seed meal-based products as wood adhesives has steadily increased, as these plant raw materials are considered renewable and environment-friendly. These natural products may serve as alternatives to petroleum-based adhesives to ease environmental and sustainability concerns. This work demonstrates the preparation and testing of the plant seed-based wood adhesives using cottonseed and soy meal as raw materials. In addition to untreated meals, water washed meals and protein isolates are prepared and tested. Adhesive slurries are prepared by mixing a freeze-dried meal product with deionized water (3:25 w/w) for 2 hr. Each adhesive preparation is applied to one end of 2 wood veneer strips using a brush. The tacky adhesive coated areas of the wood veneer strips are lapped and glued by hot-pressing. Adhesive strength is reported as the shear strength of the bonded wood specimen at break. Water resistance of the adhesives is measured by the change in shear strength of the bonded wood specimens at break after water soaking. This protocol allows one to assess plant seed-based agricultural products as suitable candidates for substitution of synthetic-based wood adhesives. Adjustments to the adhesive formulation with or without additives and bonding conditions could optimize their adhesive properties for various practical applications. Video LinkThe video component of this article can be found at

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Preparation and Testing of Plant Seed Meal-based Wood Adhesives

Chapital

2015

JoVE

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“…Thus, the results of this research with or without tung oil addition demonstrated that there were some differences in adhesive performance between soy meal-based and cottonseed meal-based products. Cheng et al (2013) showed that cottonseed protein exhibits superior adhesive strength and water resistance relative to soy protein. In a more recent study, Cheng et al (2016) blended soy and cottonseed protein with hemicellulose, cellulose, or starch and measured the adhesive performance.…”

Section: Effect Of Tung Oil On Adhesive Strength Of Soy Meal Productsmentioning

confidence: 99%

Comparison of the Adhesive Performances of Soy Meal, Water Washed Meal Fractions, and Protein Isolates

He¹,

Chapital²,

Cheng³

2016

MAS

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Adhesive bonding of wood plays an increasing role in the forest products industry and is a key factor for efficiently utilizing timber and other lignocellulosic resources. In this work, we obtained five soy meal products through commercial sources or in-house preparations. The protein content was 49.6%, 56.9%, 66.2%, 86.3%, and 91.9% for untreated defatted soy meal, pH 8.5 water washed meal, neutral water washed meal, commercial protein isolate, and in-house prepared protein isolate. The adhesive performances measured by the maximal dry and soaked shear strength of the bonded maple veneers at break were not exactly in the same order of the protein content, indicating that other components (e.g. carbohydrates, metals) might also have played certain roles in the adhesive ability of these products. Data at two press temperatures (i. e. 100, and 130 o C) with or without the addition of tung oil revealed that water washed soy meals behaved more like untreated meal than soy protein isolates. This observation is different from a recent report on the effect of water washing on cottonseed meal products. Thus, further elucidation of the mechanisms or causes of the differing effects of water washing would shed light on the adhesive mechanisms of the two types of oilseed meal materials, thus optimizing use of these materials and their fractions for wood bonding.

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Wood Adhesives Based on Natural Resources: A Critical Review: Part I. Protein‐Based Adhesives

Dunky

2021

Progress in Adhesion and Adhesives

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Investigation of modified cottonseed protein adhesives for wood composites

Cited by 82 publications

References 22 publications

Preparation and Testing of Plant Seed Meal-based Wood Adhesives

Preparation and Testing of Plant Seed Meal-based Wood Adhesives

Comparison of the Adhesive Performances of Soy Meal, Water Washed Meal Fractions, and Protein Isolates

Wood Adhesives Based on Natural Resources: A Critical Review: Part I. Protein‐Based Adhesives

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