Intelligent temperature-regulating acrylic fiber with high-sensitivity heat absorption and release functions and preparation method thereof

Abstract

The invention provides intelligent temperature-regulating acrylic fiber with high-sensitivity heat absorption and release functions. In the fiber, polyacrylonitrile accounts for 61-63% of absolute dry finished fiber, alpha cellulose accounts for 15-20%, phase-change microcapsules account for 11-21%, and heat-conducting powder accounts for 1.8-8%. The invention also provides a preparation method of the fiber. The preparation method comprises the following steps of preparing cellulose composite powder, preparing a cellulose solution, preparing polyacrylonitrile composite powder, preparing a polyacrylonitrile phase-change microcapsule composite emulsion, preparing a composite spinning solution, and performing spinning. In the prepared fiber, the polyacrylonitrile accounts for 61%-63% of the absolute dry finished fiber, the alpha cellulose accounts for 15-20%, the phase-change microcapsules account for 11-21%, the heat-conducting powder accounts for 1.8-8%, the dry strength of the fiber is larger than or equal to 3.68 cN / dtex, the wet strength of the fiber is larger than or equal to 2.10 cN / dtex, and the hooking strength of the fiber is larger than or equal to 0.94 cN / dtex.

Description

technical field [0001] The invention relates to an intelligent temperature-regulating acrylic fiber with highly sensitive heat-absorbing and releasing functions and a preparation method thereof, belonging to the technical field of acrylic fiber. Background technique [0002] Acrylic fiber is the trade name of polyacrylonitrile fiber (PAN) in China, known as artificial wool. Acrylic fiber has excellent properties, such as light weight, soft and warm hand feeling, bright and firm dyeing, and the fiber is insect-proof and mildew-proof. Among all the synthetic fibers produced on a large scale, acrylic fiber has the best stability to sunlight and atmospheric effects. After one year of sunlight and atmospheric action, most fibers lose about 95% of their original strength, while the strength of acrylic fiber only drops about 20%. The excellent light resistance and weather resistance of acrylic fiber can be attributed to the cyano group on the macromolecule. . The carbon and nitro...

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Problems solved by technology

[0009] The above three patents improve the hygroscopic performance of acrylic fiber or add conductive additives to improve the antistatic performance of acrylic fiber, which can relatively improve the comfort of acrylic fiber textiles to a certain extent, but the improvement effect is relatively poor. The comfort needed in textiles

[0010] To sum up, acrylic fiber is known as artificial wool, and its warmth retention rate is the best among synthetic fibers. Phase change releases heat, but the released heat cannot be dissipated, which will greatly increase the stuffiness of the underwear and the accumulation of static electricity; when the external temperature is high, the ideal state is the rapid phase change of the microcapsules, absorbing heat to reduce the temperature , but because of the slow heat conduction of acrylic fibers, the phase change rate of the phase change microcapsules is slow, insensitive, and cannot achieve the effect of rapid cooling

When preparing the phase-change acrylic fiber, the applicant found that adding a heat-conducting material can facilitate the conduction of heat to a certain extent, but there is a defect that the heat-conducting efficiency and the holding time of the phase-change acrylic fiber cannot be balanced, that is, increasing the heat-conducting efficiency will lead to phase change. Acrylic fiber has short heat retention time