KR20040041255A - The preparation method of foam matrix contains phase change material, fragrance, deodorant and antibacterial microcapsules - Google Patents

Abstract

PURPOSE: Provided is a method of manufacturing a foam having microcapsules containing a phase-changing substance, aroma, a deodorant and an antibiotic to exhibit multiple functions as a phase changer, an aroma dispenser, a deodorant, and a sterilizer. CONSTITUTION: The method comprises: preparing microparticles having an average particle size of 3 to 15 .mu.m by adding 0.5 wt.% of sodium hydroxide to a mixture containing 5 wt.% of anhydrous maleic acid and 15 wt.% of distilled water and heating the resultant product at 90.degree.C, emulsifying the same using a high-speed agitator at 10,000 rpm, followed by reacting at 70.degree.C for 3 hours to yield a solution containing phase-changing microcapsules, filtering the resulting solution, and washing the same three times with distilled water; and preparing a urethane foam by mixing the phase-changing microcapsules with 10 to 80 wt.% of aromatic, deodorizing, sterilizing microcapsules, and 20 to 90 wt.% of a foamable resin, stirring the mixture at high speed and subjecting the resultant product to a foaming process.

Description

The preparation method of foam matrix contains phase change material, fragrance, deodorant and antibacterial microcapsules

The present invention relates to a method for preparing a microcapsule containing a phase change material and a product containing the microcapsules prepared using the same. Specifically, the melting point has a carbon number of 11 to 25 having a range of 20 to 60 ° C. The present invention relates to a microcapsule prepared by using an alkane hydrocarbon and a higher aliphatic alcohol as a phase change material, and a method for applying fragrance, deodorant and antimicrobial microcapsules to a product.

The phase change material has a freezing point and melting point, and thus has been used mainly for the protection of the heat of other materials at low and high temperatures by using the principle of dissipating heat at the freezing point and absorbing heat at the melting point.

In particular, until now, it has been applied to products using inorganic hydrates that have a large amount of heat capacity, but since these phase change materials are hydrates, they were completely sealed with aluminum packs or plastics to prevent water evaporation when applied to products. Therefore, many problems have been raised in the application to the product.

Currently, a method of encapsulating an alkane-based phase change material, using a binder and the like on a fiber, and a method of dispersing and molding a plastic material and then applying it to a product have been developed.

However, when the microcapsules containing the phase change material are encapsulated in this manner, not only a large amount of capsules can be attached to the fiber or plastic, but also the heat transfer is slow, and thus the performance of the phase change material is not properly exhibited.

As an energy storage method to compensate for these problems, efforts are made to protect the phase change material with a polymer material and to adjust the internal temperature by using the heat generated during melting and melting according to the external environmental temperature. As a method for maximizing the effect of such a phase change material, US Patent No. 5,851,904 suggests a method of preparing a microcapsule impregnated with a phase change material to 10 μm or less and fixing the fiber to a fiber using a binder.

On the other hand, Korean Patent No. 14,627 discloses a method of applying paraffinic hydrocarbons, which can be used for heating and keeping warm, to about 1 mm with a polymer resin and coating them in multiple forms in order to protect internal materials. Was washed.

However, the conventional methods have a problem in that they contain a large amount at a concentration sufficient to exhibit the performance of the microcapsules or are difficult to be applied to a product.

By applying microcapsules to porous media that can contain a large amount of phase-change material microcapsules and effectively induce heat transfer, a medium capable of absorbing or releasing heat sensitively to ambient temperature changes can be applied to various products. To make products that can be used. In order to maintain the performance of the phase change material microcapsules and the fragrance, deodorant and antimicrobial microcapsules in summer and winter, the microcapsules are mixed with latex or urethane raw materials and foamed to facilitate the introduction of ambient air and heat transfer. It is to provide a foam containing a phase change material microcapsules that can be.

When shoes are worn in the summer, the temperature inside the shoes rises, causing discomfort and rising to a temperature that can promote the growth of bacteria.

On the other hand, in the case of wearing shoes or boots and coats in winter, the heat emitted from the human body is gradually released to the outside, so that the internal temperature is easily deprived of heat retention power after a certain time has a disadvantage. To compensate for these drawbacks, efforts have been made to keep warm using animal hair or bird feathers to reduce the rate of heat flow.

However, this method has a disadvantage in that the effect of increasing the volume of the warming agent can be exerted. Therefore, efforts are being made to apply the microencapsulation of a phase change material.

Therefore, in the present invention, by improving the durability of the polymer wall material that can protect the phase change material and powdered it to add 10 to 50 parts by weight of microcapsule powder to the synthetic resin raw material to prepare a foam having a thickness of 0.1 to 10mm We present a method for maximizing the performance of phase change materials and facilitating applicability to products.

1 microcapsules containing phase change material

2 is a perspective view of a foam including a phase change material

Thus, in the present invention, in order to solve the problems of the prior art, by developing a method capable of impregnating a large amount of phase change material microcapsules, it is easy to apply the product to various energy storage systems such as textiles, footwear, electric blankets, etc. As a result of developing a method that can be applied to a product, it suggests a method that can efficiently perform at a desired temperature.

Hereinafter, the content of the present invention in more detail,

The method for preparing a phase change material microcapsule foam according to the present invention relates to a foam containing a phase change material microcapsules having good air permeability by mixing and foaming the phase change material microcapsules with 10 to 50 parts by weight of the raw material of latex or urethane. Thereby encapsulating and powdering the phase change material into a polymer material; Preparing a foaming solution and mixing the powdered phase change substance capsule powder and the aroma, deodorant and antimicrobial microcapsule powder into the foaming solution in an amount of 10 to 50 parts by weight; After stirring the mixture at high speed, characterized in that consisting of a step of foaming at a constant 20 to 50 ℃ by knife coating on synthetic fibers or natural fibers.

As the phase change material, an alkane hydrocarbon having 12 to 25 carbon atoms, a higher fatty acid and a higher fatty alcohol, or a mixture thereof may be used. Preferably, tetradecanol, octadecane, dodeganol, tridecanol, It can be used individually or in mixture as octadecanol, nonadecane, heptadecane, etc.

As the capsule wall material, melamine formaldehyde condensate, polyurethane, polyamide, polyurea, epoxy resin, etc. may be used, and preferably, melamine formaldehyde condensate may be used.

As the foam raw material, natural and synthetic latex, urethane, epoxy, and pyron foams may be used, but are not limited thereto. Preferably, urethane and latex foams are used.

It will be described in detail through the following examples, but is not limited thereto.

Example 1

5 parts by weight of maleic anhydride is mixed with 15 parts by weight of distilled water, 0.5 parts by weight of caustic soda is added and heated to 90 ° C. for dissolution. 15 parts by weight of melamine resin and 30 parts by weight of tridecanol were added to the solution, followed by emulsification at 10,000 rpm using a high speed stirrer, followed by reaction at 70 ° C. for 3 hours to obtain a microcapsule containing a phase change material. The capsule solution was filtered through a filter and washed three times with distilled water to prepare fine powder particles having a particle size of 3 to 15 ㎛.

Example 2

20 to 25 parts by weight of the phase change material microcapsules prepared in Example 1 and the aromatic, deodorant and antimicrobial microcapsule powder were evenly mixed with 48 parts by weight of polyol, 32 parts by weight of polyisocyanate was added thereto, followed by high speed stirring for 5 minutes. A urethane foam impregnated with a phase change material microcapsules was prepared by foaming at a temperature of 2 to 3 mm at 50 ° C. for 10 minutes. The endothermic amount of urethane foam impregnated with a microcapsules of phase change material was 15.5 calories per 1g of foam, and the calorie content was not changed even after repeated use.

Example 3

Except for using natural and synthetic latex foam instead of urethane foam, the experiment of Example 2 was repeated to prepare a latex foam containing the phase change material microcapsules.

Example 4

Except for using the epoxy foam instead of the urethane foam was repeated the experiment of Example 2 to prepare an epoxy resin foam containing a phase change material microcapsules.

Example 5

The experiment of Example 2 was repeated except that the pyron foam was used instead of the urethane foam, thereby preparing a pyron foam including the phase change material microcapsules.

Example 6

Except for using polyvinylchloride foam instead of urethane foam, the experiment of Example 2 was repeated to prepare a polyvinylchloride foam impregnated with a phase change material microcapsules.

According to the present invention can be produced a foam containing a large amount of the phase change material microcapsules, there is an advantage that it can be applied in various forms.

In addition, since the amount of phase change material microcapsules can be arbitrarily controlled, the endothermic amount and calorific value can be adjusted according to the use.

Thus all products that are intended to release or absorb heat; That is, there is an advantage that it can be easily applied by constantly molding the foam to shoes, shoe insoles, fabrics, clothes, heat transport pipes.

Claims (5)

5 parts by weight of maleic anhydride was mixed with 15 parts by weight of distilled water, 0.5 parts by weight of caustic soda was added and heated at 90 ° C. to dissolve. After reacting for 3 hours at 70 ℃ to obtain a microcapsule containing a phase change material. Filtering the capsule solution through a filter and then washing three times with distilled water to prepare fine powder particles having a particle size of 3 to 15 μm; And 10 to 80 parts by weight of the prepared phase change material microcapsules and 10 to 80 parts by weight of aroma, deodorant and antimicrobial microcapsule powders were added to the foamed resin, that is, urethane, epoxy, pyron, and latex, and stirred at high speed for 5 minutes and then 0.1 to 10 at 50 ° C. preparing a urethane foam containing the phase change material microcapsules by foaming for 10 minutes with a thickness of mm; Phase change material comprising, aroma, deodorant and antimicrobial microcapsules comprising the preparation method of the foam. The method of preparing and powdering the phase change material microcapsules using melamine resin, urea, urethane, epoxy, etc. as the wall material of the phase change material microcapsules in claim 1. The method of preparing a phase change material microcapsules using a mixture of alkanes hydrocarbons, higher fatty acids and higher fatty alcohols having 12 to 25 carbon atoms or a mixture thereof as the phase change material in claim 1. Resin that may cause foaming in claim 1 is a method for producing a foam containing a phase change material microcapsules using urethane, epoxy, pyron, natural and synthetic latex. Method of manufacturing a product using the endothermic and exothermic properties of the phase change material by applying to a shoe, shoe insole, fabric, clothing, heat transport tube using a foam containing a phase change material microcapsules in claim 1.