Phase transition temperature adjusting viscous fibers and preparation method thereof

Abstract

The invention provides a preparation method of phase transition temperature adjusting viscous fibers. The preparation method of the phase transition temperature adjusting viscous fibers includes the step that phase transition material microcapsules are prepared; preparation of the phase transition material microcapsules includes the steps of preparing phase transition material emulsified liquid, preparing melamine formaldehyde resin capsule wall material prepolymers and conducting polymerization reaction; when the phase transition material emulsified liquid is prepared, a phase transition material, a phase transition auxiliary agent, an emulsification agent, an initiating agent and distilled water are adopted according to the mass ratio of 100:(7-10):(6-8):(1.7-2.2):(340-370). According tothe prepared phase transition temperature adjusting viscous fibers, the melting enthalpy value is 20.8-22 J / g, and the melting temperature is 28-32 DEG C.

Description

[0001] The present invention is a divisional application of application number 2017101837430, application date March 24, 2017, and invention name "a phase-change temperature-regulating viscose fiber with high heat storage capacity and its preparation method". technical field [0002] 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 [0003] 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. [0004] 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 t...

AI Technical Summary

Problems solved by technology

[0009] (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;

[0010] 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 original solution are lost, resulting in a large loss of phase change materials

[0011] 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

[0012] (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