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ARS Home » Southeast Area » New Orleans, Louisiana » Southern Regional Research Center » Commodity Utilization Research » Research » Publications at this Location » Publication #326327
Research Project: Increasing the Value of Cottonseed

Location: Commodity Utilization Research

Title: Adhesive performance of washed cottonseed meal at high solid contents and low temperatures

Author
item He, Zhongqi
item Chapital, Dorselyn
item Cheng, Huai

Submitted to: Meeting Proceedings
Publication Type: Proceedings
Publication Acceptance Date: 5/5/2016
Publication Date: 6/27/2016
Citation: He, Z., Chapital, D.C., Cheng, H.N. 2016. Adhesive performance of washed cottonseed meal at high solid contents and low temperatures. In: Proceedings of the 70th Forest Products Society (FPS) international Convention, June 27-29, 2016, Portland, Oregon. Track 2.7.1. 4 pp.

Interpretive Summary: Cotton is America’s number one value-added crop. Currently, however, cotton fiber represents 85- 90% of cotton's total economic value. Thus, enhanced utilization of cottonseed products as industrial raw materials would greatly benefit cotton growers and processors. In this work, we tested the adhesive strength and viscosity of the adhesive preparation with high solid contents (up to 30%) per the input of industrial partners. The effect of citric acid (CA) and sodium dodecyl sulfate (SDS) were also evaluated under the same conditions. The shear strength at break of the maple pairs bonded at 40 and 60 oC was lower than that of maple pairs bonded at 100 oC. However, the shear strength of the pairs bonded at lower temperature could be improved by extending bonding time up to 120 min. CA improved the viscosity of WCSM adhesive with 20% solid content, but lowered the adhesive strength. SDS showed reverse impacts on adhesive strength and viscosity, compared to CA addition. These data indicated WCSM preparations with low solid contents could be used as low-temperature adhesives of those domestic furniture and small utensils that cannot stand up high press temperature.

Technical Abstract: Water-washed cottonseed meal (WCSM) has been shown as a promising biobased wood adhesive. Recently, we prepared WSCM in a pilot scale for promoting its industrial application. In this work, we tested the adhesive strength and viscosity of the adhesive preparation with high solid contents (up to 30%) per the input of industrial partners. The effect of citric acid (CA) and sodium dodecyl sulfate (SDS) were also evaluated under the same conditions. The shear strength at break of the maple pairs bonded at 40 and 60 oC was lower than that of maple pairs bonded at 100 oC. However, the shear strength of the pairs bonded at lower temperature could be improved by extending bonding (pressing) time from 20 min to 120 min. CA improved the viscosity of WCSM adhesive with 20% solid content, but lowered the adhesive strength. SDS showed reverse impacts on adhesive strength and viscosity, compared to CA addition. Observations on this work demonstrated that a formulation with 20% WCSM and 1% CA could meet the criteria of both operational flowability of the adhesive and the shear strength of the forest product we targeted.