Development of temporary wet strength resins from wheat gluten Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/tb09j8561

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  • Many paper products like towel and tissue cannot serve their purposes without temporary wet strength Glyoxal-polyacrylamide (GPA) resin is one of the widely used commercial wet strength additives that impart the temporary wet strength to paper and paperboard products However, GPA resin is derived from petrochemicals and contributes to contaminants in the recycling of papers Wheat gluten is one of the most abundant proteins in nature Unique chemical composition of wheat gluten makes it an ideal raw material for temporary wet strength additives This research investigated how to convert gliadin one of key components of wheat gluten, to effective temporary wet strength additives Gliadin was first modified with glycidyltrirnethylammonium chloride (GTA) to generate positively charged GTA-gliadin Further reaction of GTA-gliadin with glyoxal provided GTA-gliadin-glyoxal resins For enhancing the dry and wet strengths of GTA-gliadin-glyoxal-treated paper, the optimum reaction conditions for the reaction between GTA and gliadin were found to be 75 wt% GTA based on dry gliadin and 8 h reaction time at 70°C Thirty percent of glyoxal based on dry weight of GTA-gliadin in the reaction between glyoxal and GTA-gliadin resulted in the highest dry and wet strengths The GTA-gliadin-glyoxal resin was comparable to a commercial GPA resin in terms of enhancing the dry and wet strengths of the wetstrength- resin-treated paper.
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