1. Graft copolymers of collagen and acrylic monomers--Reagents for sizing of cotton yarn
- Author
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Rafikov, Adham Salimovich, Ibodulloyev, Bekzod Shuxrat Ugli, Yasinskaya, Nataliya Nikolayevna, and Khakimova, Mukaddas Shamuratovna
- Subjects
Amides ,Proteases ,Acrylic acid ,Graft copolymers ,Collagen ,Methamphetamine ,Chemical tests and reagents ,Engineering and manufacturing industries ,Science and technology - Abstract
A new highly effective sizing reagent based on grafted collagen copolymers has been proposed for cotton yarn. The copolymers were synthesized by reacting an aqueous solution of collagen with acrylic monomers--acrylic, matacrylic acids, and their amides in the presence of potassium persulfate. Based on Scanning electron microscopy--Energy dispersive (SEM-EDS) analysis data, the composition of the copolymers was determined. Unsaturated acids are more actively grafted onto collagen than their amides. When a polymer film is formed from a solution of a collagen copolymer with (meth)acrylic acid, microcracks appear on the surface of the sample; microcracks are absent in films of copolymers with (meth)acrylamide. Films of copolymers, especially methacrylamide, are quite flexible and contribute to a significant improvement in the properties of the yarn. The tensile strength of yarn sized with copolymers increases by 20%-65% compared to unsized yarn, and by 13%--38% compared to yarn sized with a starch solution. At the same time, the relative tensile elongation of the experimental yarn improves by 14%-58%, while this property of starch-size yarn deteriorates by 14%-22% compared to unsized yarn. The complete removal of graft copolymers from the surface of the yarn in the process of biochemical desizing using the enzyme protease is shown. Highlights * Graft copolymerization of (meth)aciylamide with collagen was carried out. * Grafting is initiated by the interaction of collagen with potassium persulfate. * The synthesized copolymers are effective sizing reagents for cotton yarn. * The copolymer with poly(meth)acrylamide forms a flexible and stable film. * The protease enzyme completely removes the size from the surface of the yarn. KEYWORDS acrylic monomer, collagen, cotton yam, graft copolymer, morphology, sizing, 1 | INTRODUCTION The preparation of cotton yarn for weaving is a technological link between the production of yarn and the production of fabric, therefore it plays a significant role [...]
- Published
- 2024
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