阅读说明：本技术 一种含乳木果油的再生纤维素纤维及其制备方法 (regenerated cellulose fibers containing shea butter and preparation method thereof ) 是由 冯杰宝 吴国清 孟晶晶 于 2019-09-03 设计创作，主要内容包括：本发明公开了一种含乳木果油的再生纤维素纤维及其制备方法,再生纤维素纤维包括经乳化的乳木果油,所述再生纤维素纤维制成的织物在穿戴2h后可提高皮肤角质层含水量5～9.5％；所述再生纤维素纤维还包括含有锌元素的防晒因子,所述再生纤维素制成的织物的UPF不小于60,对UVA的透过率小于3.5％。本发明提供的再生纤维素纤维中含有乳木果油具有较好的皮肤保湿效果,在穿戴一定时间后可提高人体皮肤角质层的含水量；同时,纤维中加入了少量防晒因子,所述防晒因子与乳木果油中的胶乳物质协同作用,大大提高了所述纤维制成织物的防晒性能。(The invention discloses regenerated cellulose fibers containing shea butter and a preparation method thereof, wherein the regenerated cellulose fibers comprise emulsified shea butter, a fabric made of the regenerated cellulose fibers can improve the moisture content of a skin cuticle after being worn for 2 hours by 5-9.5%, the regenerated cellulose fibers also comprise a sun-screening factor containing zinc element, the UPF of the fabric made of the regenerated cellulose fibers is not less than 60, and the transmittance of the fabric to UVA is less than 3.5%.)

kinds of regenerated cellulose fibers containing shea butter are characterized in that the regenerated cellulose fibers comprise emulsified shea butter, and after being worn for 2 hours, fabrics made of the regenerated cellulose fibers can improve the water content of the horny layer of the skin by 5-9.5%.

2. The shea butter-containing regenerated cellulose fibers of claim 1, further comprising a sun protection factor comprising zinc, wherein the regenerated cellulose fabrics have a UPF of not less than 60 and a UVA transmittance of less than 3.5%.

3. Shea butter-containing regenerated cellulose fibers according to claim 1 or 2, characterized in that the sun protection factor is a complex of zinc ions with butyl methoxydibenzoylmethane.

4, A method for preparing the regenerated cellulose fiber containing shea butter according to any of claims 1-3, characterized in that the emulsified shea butter is coated in the wall material to form microcapsule liquid, in the fiber production process, the microcapsule liquid and the sun protection factor are added into the cellulose liquid in any process from dissolution to spinning, and then the regenerated cellulose fiber is prepared by spinning and post-treatment.

5. The method for preparing the shea butter-containing regenerated cellulose fibers according to claim 4, wherein the emulsifying step comprises adding shea butter into an emulsifier, heating to 35-52 ℃, and stirring at 3000-3500 rpm for 10-30 min to obtain shea butter emulsion.

6. The method for preparing the shea butter-containing regenerated cellulose fibers according to claim 5, wherein the mass ratio of the shea butter to the emulsifier is 1: 0.3-0.6, and the emulsifier is a mixture of polyethoxylated isomeric tridecanol and tween 80;

preferably, the mass ratio of the polyethoxylated isotridecanol to the Tween 80 is 0.2-0.5: 1.

7. The method for preparing the shea butter-containing regenerated cellulose fiber according to claim 5 or 6, wherein the specific preparation of the microencapsulated solution formed by coating the emulsified shea butter in the wall material comprises the following steps:

(1) mixing melamine and formaldehyde in a certain proportion, adding deionized water, stirring, adjusting the pH value to 7.8-8.4, slowly heating to 65 ℃, and stirring at the rotating speed of 800-1000 rpm for 30min to obtain a prepolymer;

(2) dropwise adding the prepolymer prepared in the step (1) into the shea butter emulsion, simultaneously stirring at the rotation speed of 1300-1600 rpm, adjusting the temperature to 60 ℃, adjusting the pH to 4-6, stirring for 30 min-2 h, and adding sodium methylenedinaphthalene sulfonate to obtain microcapsule liquid;

preferably, the step (2) further comprises adjusting the pH of the prepared microcapsule liquid to 8, and simultaneously adding urea to react at 60 ℃ for 30 min.

8. The method for preparing a regenerated cellulose fiber containing shea butter according to any of claims 4-7, wherein the sun protection factor is added to the microcapsule solution and stirred to form a mixed solution, the temperature of the mixed solution is controlled to 30-42 ℃, and then any processes from dissolution to spinning are added;

preferably, the mixture is added prior to spinning.

9. The method for preparing a regenerated cellulose fiber containing shea butter according to claim 8, wherein the amount of the microcapsule liquid is 0.5 to 2.0 wt% of the content of methylcellulose in the cellulose gum liquid, and the amount of the sun protection factor is 0.3 to 0.5 wt% of the content of methylcellulose in the cellulose gum liquid.

10. The method for preparing a regenerated cellulose fiber containing shea butter according to claim 8, wherein the sun protection factor is a complex formed by reacting zinc ions with butyl methoxydibenzoylmethane in a molar ratio of 2:1, and the complex is a powder with a particle size of 1-20 nm.

Technical Field

The invention belongs to the technical field of spinning, and particularly relates to regenerated cellulose fibers containing shea butter and a preparation method thereof.

Background

With the increasing improvement of the living quality of people, huge consumption willingness on fiber textile products is generated, particularly the requirements on the skin-friendly property and the functionality of the fiber products are determined by , and the fiber products with the moisturizing function are more concerned by the market.

The excellent effect and skin-friendly property of shea butter among moisture-retaining functional products are increasingly recognized and accepted by consumers, and the main components of shea butter are glycerin triacetate (containing amounts of linoleic acid) and unsaponifiable matter, wherein the glycerin triacetate content is about 80%, and the unsaponifiable matter content varies depending on seasons, places of production and extraction and refining methods, wherein part of unsaponifiable matter is cinnamic acid vinegar of spinasterol and stigmasterol, which are biological precursors of certain sterols and steroids, and have a positive effect on the growth of skin tissues.

Due to the moisturizing property of shea butter, it is often applied to skin care products such as face creams, but it is not easy to apply it to fiber products due to its own characteristics. In addition, on the basis of the moisture retention function, the market also has great demand for the fiber with the sun protection function.

Chinese patent with application number 201711014156.5 discloses shea butter compositions and a preparation method and application thereof, and shea butter compositions are provided, which comprise, by mass, 8-50% of shea butter, 10-50% of an emulsifier, 8-35% of an auxiliary emulsifier, 10-40% of liquid grease, and 0.01-5% of a stabilizer, wherein shea butter is wrapped inside by the liquid grease, and is combined with the emulsifier, the auxiliary emulsifier and the stabilizer to form a stable self-microemulsion, and when the stable self-microemulsion is dispersed in water, an O/W type microemulsion with a particle size of 10-300 nm can be formed spontaneously, and the load capacity of the shea butter is large and can reach 50%.

In view of the above, the present invention is particularly proposed.

Disclosure of Invention

The technical problem to be solved by the invention is to overcome the defects of the prior art, and provide regenerated cellulose fibers containing Shea butter, wherein a latex substance in the Shea butter and a zinc-containing sun protection factor with a small addition amount generate a synergistic effect, and the fibers have a moisturizing effect and a better sun protection function.

In order to solve the technical problems, the invention adopts the technical scheme that:

the invention provides regenerated cellulose fibers containing shea butter, wherein the regenerated cellulose fibers comprise emulsified shea butter, and a fabric made of the regenerated cellulose fibers can improve the moisture content of the stratum corneum of skin by 5-9.5% after being worn for 2 hours.

In the scheme, the regenerated cellulose tow is prepared by taking or more of bamboo pulp, cotton pulp or wood pulp as raw materials, the shea butter is grease with definite form, is similar to cooled beef tallow, is suitable for being directly used for coating cosmetics and skin care products, but is not beneficial to being applied to fiber products due to poor dispersion performance, and therefore, the shea butter needs to be emulsified to be in an easily dispersed liquid state so as to prepare fibers with moisture retention performance.

According to a further aspect of the present invention at , the regenerated cellulose fibers further comprise a sun protection factor comprising zinc, and the regenerated cellulose fibers provide a fabric having a UPF of not less than 60 and a UVA transmission of less than 3.5%.

A further embodiment is that the sun protection factor is a complex of zinc ion and butyl methoxydibenzoylmethane.

According to the scheme, in addition to the moisture retention capacity of , the shea butter in the fibers has a sun protection performance of in part of latex substances, but the sun protection performance of the shea butter is weak under the condition that the addition amount of the shea butter is limited, the existing sun protection auxiliary agents are usually organic sun protection agents or inorganic particles such as zinc oxide and titanium oxide, the dispersing performance of the materials in the fibers is poor, if the addition amount of the materials is large, the mechanical performance of regenerated cellulose fibers is affected, therefore, the selection of the sun protection factor is limited, the durability of the organic sun protection agents is improved by using the organic sun protection agents complexed with metal particles, meanwhile, the addition amount of the sun protection factor is controlled to be low, the influence on the mechanical performance of the fibers is prevented, workers of the invention surprisingly find that when the addition amount of the sun protection factor is small, the sun protection effect of the fibers made into a fabric is improved, the ultraviolet protection effect can be calculated as the ultraviolet protection effect when the ultraviolet radiation of the shea butter ingredient and the latex ingredients generate synergistic effect, and the ultraviolet protection effect is calculated as the ultraviolet protection effect, wherein the ultraviolet radiation of the ultraviolet protection factor is calculated as the ultraviolet protection effect, the ultraviolet protection effect is calculated as the ultraviolet protection factor of the ultraviolet radiation of the fabric is no ultraviolet radiation of which is between.

The invention also provides preparation methods of the above regenerated cellulose fiber containing shea butter, which comprises coating emulsified shea butter in wall materials to form microcapsule liquid, adding the microcapsule liquid and sun-screening factors into cellulose gel liquid in any process from dissolution to spinning in the fiber production process, and then spinning and post-treating to obtain the regenerated cellulose fiber.

In the method, the fiber production process comprises the steps of dipping, ageing, yellowing, dissolving, filtering, defoaming, spinning, washing and desulfurizing in sequence.

According to the above preparation method: the emulsification comprises the steps of adding the shea butter into an emulsifier, heating to 35-52 ℃, and stirring at 3000-3500 rpm for 10-30 min to prepare the shea butter emulsion.

According to the above preparation method: the mass ratio of the shea butter to the emulsifier is 1: -0.6, and the emulsifier is a mixture of polyethoxylated isomeric tridecanol and tween 80; preferably, the mass ratio of the polyethoxylated isotridecanol to the Tween 80 is 0.2-0.5: 1.

In the preparation method, the viscous shea butter with definite form is stirred and mixed with the emulsifier at high speed, so that the shea butter exists in the form of tiny oil drops in the emulsion, and after the shea butter is mixed with the regenerated cellulose fiber spinning glue solution, the shea butter component of the lipid can be uniformly dispersed in the fiber, and in order to further step retain the lipid component of the shea butter in the fiber, the effective component of the shea butter is coated by adopting a microcapsule technology in step .

According to the above preparation method: the specific preparation method of the microcapsule liquid formed by coating the emulsified shea butter in the wall material comprises the following steps:

(1) melamine and formaldehyde in a certain proportion are mixed, deionized water is added, the mixture is stirred, the pH value is adjusted to 7.8-8.4, the temperature is slowly increased to 65 ℃, and the mixture is stirred for 30min at the rotating speed of 800-1000 rpm, so that prepolymer is obtained;

(2) and (2) dropwise adding the prepolymer prepared in the step (1) into the shea butter emulsion, simultaneously stirring at the rotation speed of 1300-1600 rpm, adjusting the temperature to 60 ℃, adjusting the pH to 4-6, stirring for 30 min-2 h, and adding sodium methylenedinaphthalene sulfonate to obtain the microcapsule liquid.

Preferably, the step (2) further comprises adjusting the pH of the prepared microcapsule slurry to 8, and simultaneously adding urea to react at 60 ℃ for 30 min.

In the preparation method, after the shea butter emulsion is added into the prepolymer, a polycondensation reaction occurs around the liquid drop of the shea butter under the acidic and heating conditions, and the polymer wall material can be condensed and deposited around the shea butter to form a microcapsule wall through the reaction. And the pH value of the microcapsule liquid is adjusted, and urea is added to react at 60 ℃ to remove formaldehyde substances in the system and prevent the formaldehyde substances from being brought into the fibers.

The preparation method comprises the steps of adding the sun protection factor into the microcapsule liquid, stirring to prepare a mixed liquid, controlling the temperature of the mixed liquid to be 30-42 ℃, and adding any steps from dissolution to spinning, preferably adding the mixed liquid before spinning.

In the above preparation method, the influence of the temperature on the aging degree of the adhesive can be reduced by controlling the temperature within the range.

According to the above preparation method: the addition amount of the microcapsule liquid is 0.5-2.0 wt% of the content of alpha fibers in the cellulose glue solution, and the addition amount of the sun protection factor is 0.3-0.5 wt% of the content of the alpha fibers in the cellulose glue solution.

In the preparation method, the addition content of the sun-screening factor is low, but the fabric made of the fiber has good sun-screening performance, the UPF value is more than 60 and far higher than the requirement of national standard, the reason probably lies in that the latex component in the shea butter has function of absorbing ultraviolet rays, and after a small amount of the sun-screening factor is added, the latex component and the shea butter produce a synergistic effect, so that the sun-screening performance is greatly improved.

According to the above preparation method: the sun protection factor is a complex formed by reacting zinc ions and butyl methoxy dibenzoyl methane in a molar ratio of 2:1, and the complex is powder with the particle size of 1-20 nm.

In the preparation method, firstly, the butyl methoxy dibenzoyl methane is added into methanol, then the sodium acetate with the same molar weight is added into the methanol, under the condition of stirring, the methanol solution of zinc chloride is added according to the molar ratio, the precipitate is obtained by suction filtration after stirring, and the precipitate is dried in the air and ground to the particle size of 1-20 nm.

According to the preparation method, the preparation method specifically comprises the following preparation steps:

(1) the emulsification comprises the steps of adding shea butter into an emulsifier, heating to 35-52 ℃, and stirring at 3000-3500 rpm for 10-30 min to prepare shea butter emulsion; the mass ratio of the shea butter to the emulsifier is 1: 0.3-0.6, the emulsifier is a mixture of polyethoxylated isomeric tridecanol and tween 80, and the mass ratio of polyethoxylated isomeric tridecanol to tween 80 is 0.2-0.5: 1;

(2) melamine and formaldehyde in a certain proportion are mixed, deionized water is added, the mixture is stirred, the pH value is adjusted to 7.8-8.4, the temperature is slowly increased to 65 ℃, and the mixture is stirred for 30min at the rotating speed of 800-1000 rpm, so that prepolymer is obtained;

(3) dropwise adding the prepolymer prepared in the step (2) into the shea butter emulsion prepared in the step (1), stirring at the rotation speed of 1300-1600 rpm, adjusting the temperature to 60 ℃, adjusting the pH to 4-6, stirring for 30 min-2 h, and adding sodium methylenedinaphthalene sulfonate to obtain a microcapsule liquid;

(4) adding butyl methoxy dibenzoyl methane into methanol, adding sodium acetate with an equimolar amount into the methanol, adding a methanol solution of zinc chloride according to the molar ratio of zinc ions to the butyl methoxy dibenzoyl methane of 2:1 under the condition of stirring, performing suction filtration to obtain a precipitate after stirring, air-drying and grinding to obtain a sun-screening factor with the particle size of 1-20 nm;

(5) adding the sun-screening factor prepared in the step (4) into the microcapsule liquid prepared in the step (3), stirring to prepare a mixed liquid, and controlling the temperature of the mixed liquid to be 30-42 ℃;

(6) in the production process of the fiber, adding the cellulose glue solution of any working procedures between dissolving and spinning into the mixed solution prepared in the step (5), adding the microcapsule solution into the cellulose glue solution, wherein the addition amount of the microcapsule solution is 0.5-2.0 wt% of the content of alpha fibers in the cellulose glue solution, and the addition amount of the sun protection factor is 0.3-0.5 wt% of the content of the alpha fibers in the cellulose glue solution;

(7) and (4) spinning the cellulose glue solution added with the mixed solution in the step (6) to obtain a finished product.

After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:

1. in the regenerated cellulose fiber provided by the invention, shea butter is uniformly dispersed in a fiber product under the action of an emulsifier and a microcapsule, so that the moisture retention performance of the fiber product is greatly improved;

2. in the regenerated cellulose fiber provided by the invention, part of latex components in the shea butter and the sun protection factor generate a synergistic effect, so that the fabric prepared from the fiber has a higher UPF value under the condition of low sun protection factor content, and a good sun protection effect is achieved.

The following is a detailed description of a specific embodiment of the invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below, and the following embodiments are used for illustrating the present invention and are not used for limiting the scope of the present invention.