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Polyacrylonitrile temperature-regulating fiber, and its manufacturing method

A temperature-regulating fiber, polyacrylonitrile technology, applied in the manufacture of rayon, fiber chemical characteristics, single-component synthetic polymer rayon, etc., can solve the problem of no temperature-regulating function, etc. Good mechanical strength, the effect of reducing energy consumption

Inactive Publication Date: 2006-10-25
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these patented technologies are aimed at conventional acrylic products, not temperature-regulating fibers, and do not have temperature-regulating functions.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0039] Since the preparation process of the phase change material microcapsule is completed in the water phase, the wet cake of the phase change material microcapsule after filtration and separation contains 40.0-60.0% of water. The dry phase change material microcapsules can be obtained after the phase change material microcapsule wet cake is dried in air or vacuum at 45-95°C, but this process not only increases the process, consumes energy, but also may cause bonding between the microcapsules, or The microcapsules may be broken, so the manufacturing method of the present invention is preferably made by phase-change material microcapsule wet cake.

[0040] The phase change material in the phase change material microcapsule of the present invention can be one or more in the following substances with phase change properties: (1) straight-chain alkanes with 12 to 40 carbon atoms, such as n-dodecane , n-tridecane, n-tetradecane, n-pentadecane, n-hexadecane, n-heptadecane, n-octad...

Embodiment 1

[0052] 90.0% (percentage by weight, the same below) of n-nonadecane and 10.0% of 1-heterocontanol are used as the capsule core (phase change) material, and melamine-formaldehyde copolymer is used as the capsule wall material, and the in-situ polymerization method is adopted. Phase change material microcapsules are prepared, the phase change material content in the microcapsules is 75.0%, the diameter of the microcapsules is 320nm to 4.0μm, and the microcapsule suspension is filtered to obtain a phase change material microcapsule wet cake with a water content of 48.0%.

[0053] In a 5-liter polymerization kettle equipped with a mechanical stirrer and a reflux condenser, add 1500g of deionized water, and after flushing the reaction kettle with dry nitrogen, add 500g of acrylonitrile, 216g of 2-vinylpyridine, and 21.5g of sulfonylmethacrylic acid Sodium persulfate and 2.9g chain transfer agent-isopropanol, after stirring evenly, add 1.5g ammonium persulfate and 2.9g sodium bisulfi...

Embodiment 2

[0058] With the acrylonitrile copolymer containing phase change material microcapsules in embodiment 1 as core component, with 85% acrylonitrile and 14% methyl acrylate and 1% sodium acrylate sulfonate copolymer as sheath component, core component The core and sheath components are respectively added to the twin-screw extruder with the temperature of the first to fourth heating zones and pump bases being 180, 200, 220, 240, and 240°C for melt extrusion, and the weight ratio of the core component to the sheath component is 2 : 3, metered by 1.20 milliliters / rev metering pump respectively, enter into 24 holes × 0.3mm spinneret for spinning, after air cooling, winding can obtain the core-sheath composite temperature-regulating fiber whose denier is 5.3dtex.

[0059] It has been determined that during the heating process, the temperature-regulating fiber has an obvious heat-absorbing behavior at about 37°C; during the cooling process, the temperature-regulating fiber has an obvious...

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Abstract

The invention relates to the polyacrylonitrile and the producing process. The weight percent of the adjusting temperature is showed below: the acrylonitrile 30.0-92.5%; the second monomer 2.5-20.0%; the chain transferring reagent 0.03-0.3%; the solicitation reagent 0.05-0.4%; phase changing material tiny capsule 5.0-50.0%. the producing process adopts the said adjusting fiber material, the solicitation reagent is used to bring the second monomer and the existing possibly third monomer and the water phase deposit of the chain transferring reagent to converge in the phase changing material tiny capsule hanging chaotic liquid, the polymer produced form the action contains the said percentage of the phase changing material tiny capsule, the mixing hybrid of the acrylonitrile sharing material and the phase changing material tiny capsule is gained; the gained equal hybrid is cleaned by the secondary or thrice ion water and dried under the temperature of 45-95 degree, the filature is melted under the temperature of 10-40 degree above the melting point of the acrylonitrile gathering material in the screw extruding engine to produce the said adjusting temperature fiber. The said adjusting temperature fiber has many merits such as the good function of absorbing or releasing the heat energy, the high machine intension and the low cost.

Description

technical field [0001] The invention relates to functional fiber technology, specifically a temperature-adjusting fiber with functions of absorbing, storing and releasing heat energy and its manufacturing method which can be processed by melt spinning technology. The international patent main classification number is proposed to be Int.Cl.D01F 1 / 10 (2006.01). Background technique [0002] The temperature-regulating fiber (temperature-regulating fiber) technology introduces low-temperature phase change materials in the fiber manufacturing process to endow the fiber with the functions of absorbing, storing and releasing heat energy, so that the fiber has the function of absorbing or releasing heat when the ambient temperature changes, so that it can be used in a certain temperature range. The internal temperature can be adjusted bidirectionally within a certain period of time to improve the wearing comfort of textiles. Temperature-regulating fiber products play an equally imp...

Claims

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Application Information

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IPC IPC(8): D01F6/18D01F1/10
Inventor 张兴祥韩娜王学晨牛建津张华李军
Owner TIANJIN POLYTECHNIC UNIV
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