Preparation method of double-net hydrogel fiber and product thereof

Abstract

The invention discloses a preparation method of a double-net hydrogel fiber and a product thereof. The preparation method mainly includes following steps: (1) preparation of a spinning raw solution: dissolving one or more water-soluble natural polysaccharides and a water-soluble acrylamide polymer in water with stirring uniformly, and performing filtration and defoaming to obtain a mixed spinning raw solution containing the natural polysaccharides and the acrylamide polymer; (2) preparation of a water-containing primary gel fiber: performing wet spinning, or dry-wet spinning or gel spinning to the mixed spinning raw solution prepared in the step (1), performing a spinning process at a preset speed, mixing the mixed spinning raw solution with a coagulating bath, to obtain the water-containing primary gel fiber; and (3) radiation crosslinking: drafting the primary gel fiber into an ionizing radiation apparatus and performing the radiation crosslinking to the primary gel fiber prepared in the step (2), and performing a subsequent drafting operation, a thermal-moulding operation, a winding-up operation and a fiber-cutting operation to obtain the double-net hydrogel fiber.

Description

Technical field [0001] The invention relates to the field of polymer material processing, and more specifically, to a method for preparing double-network hydrogel fibers and products thereof. Background technique [0002] At present, there are two main types of hydrogel fibers. One type is superabsorbent fibers with vinyl hydrophilic polymers such as acrylic polymers as the main body; the other is single-component or multi-component hydrophilic fibers with natural biomass as the main body. Water fibers, both types of hydrogel fibers only contain a cross-linked network structure. [0003] The companies and their main products that have realized the industrialized production of superabsorbent fibers at home and abroad mainly include: British Technical Absorbents company adopts the British COURTAULD and British United Colloids technology to produce the brand name "Oasis" superabsorbent fiber; Canada Alberta Camelot Super Absorbents Co., Ltd., Galcali City, Province, adopts the techno...

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the above-mentioned water-absorbing gel fibers in the prior art have poor toughness, low elasticity, are easy to break when stretched, and are fragile when compressed. They need to be blended with other supporting fibers, which brings difficulties to the subsequent processing of the fibers. The present invention adopts the technology of combining ion cross-linking and ionizing radiation cross-linking to construct a uniformly distributed double-network structure inside the fiber in situ, and prepare a high-toughness double-network hydrogel fiber, which has good toughness in dry state. It can be spun alone, has strong water absorption and water retention capacity, and has good biocompatibility and strong salt resistance

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