High-thermal-storage-capacity phase-changing temperature-adjusting viscose fiber and preparation method thereof

Abstract

The invention provides a high-thermal-storage-capacity phase-changing temperature-adjusting viscose fiber. The viscose fiber is 20.8 to 22J / g in melting enthalpy value, and is 18.5 to 19.7J / g in crystallization enthalpy value. The invention further provides a preparation method of the high-thermal-storage-capacity phase-changing temperature-adjusting viscose fiber. The preparation method comprises modification of a phase-change material microcapsule, namely, the phase-change material microcapsule is modified by a modifier solution, wherein the modifier solution is prepared from the following raw materials in parts by weight: 2 parts of guar gum, 4 parts of chitosan, 1 part of polyvinyl alcohol, 30 parts of pure water and 100 parts of acetic acid. By adopting the high-thermal-storage-capacity phase-changing temperature-adjusting viscose fiber and the preparation method thereof, the loss of a phase-change material in a process of preparing a phase-change fiber is reduced, the disassembly back-flushing rate of a coagulating bath filter is lowered, the quality level of sodium sulfate as a side product is raised, the crystallization enthalpy value and the melting enthalpy value of the phase-changing temperature-adjusting fiber are increased greatly, and the fiber strength, hygroscopicity and fiber density of the phase-changing temperature-adjusting viscose fiber are improved.

Description

technical field [0001] The invention relates to a phase change fiber, in particular to a high heat storage phase change temperature-adjusting viscose fiber and a preparation method thereof, belonging to the technical field of textiles. Background technique [0002] Phase change fiber is a heat storage and temperature regulating functional fiber developed by utilizing the characteristics of phase change materials releasing or absorbing latent heat during the phase change process and keeping the temperature basically unchanged. [0003] Phase change materials refer to substances that change shape with temperature changes and can absorb or provide latent heat. Phase change materials can undergo phase changes according to changes in the external environment temperature, and absorb or release heat from the outside, forming a basic temperature around the textile. Constant microclimate and thus thermoregulation of the temperature. [0004] In the prior art, a blending method is ge...

AI Technical Summary

Problems solved by technology

[0008] (1) There is a large loss of phase-change microcapsules, causing a large part of the phase-change microcapsules to be lost to the acid bath but not all into the fiber, which leads to the problem that the phase change enthalpy of the fiber is small; the specific loss process is: viscose spinning In the stock solution, the content of methyl fiber is between 8.2-9.2%, and the methyl fiber can be solidified and formed during the spinning process to form fibers;

[0009] In the spinning process, when the blended solution of viscose spinning stock solution and phase change microcapsules is sprayed into the coagulation bath, the first fiber starts to solidify and form, and then covers the added microcapsules, but viscose spinning The substance that can be solidified and formed in the stock solution, that is, the content of methyl fiber is less than 10%. There are very few microcapsules that can be coated by methyl fiber during the molding process, and a large number of phase-change microcapsules will follow the spinning viscose. 90% of the water, soluble salts and other substances in the stock solution are lost, resulting in a large loss of phase change materials

[0010] In actual experiments, it was found that when the amount of microcapsule solid dry powder added to methyl fiber was 10%, the content of phase-change microcapsules in the finished fiber was less than 4.9%, and a large amount of phase-change microcapsule materials were lost and entered the coagulation bath, increasing the The removal rate of the coagulation bath filter reached 80%. At the same time, the residual phase-change microcapsules entered the crystallizer and adhered to each other into the sodium sulfate decahydrate product during the crystallization process, which seriously affected the quality of the crystals. After detection and analysis by instruments, The phase change material content in sodium sulfate decahydrate crystals can reach up to 2.6g / kg Glauber’s salt, which seriously reduces the quality of by-product crystals and limits the scope of application

[0011] (2) In addition, the phase change microcapsules have poor compatibility with the fiber matrix, resulting in a decrease in fiber strength, a decrease in the hygroscopicity of the viscose fiber, and a decrease in the density of the fiber