WO2020113902A1 - 一种含有神经酰胺微胶囊的再生纤维素纤维及其制备方法 - Google Patents

一种含有神经酰胺微胶囊的再生纤维素纤维及其制备方法 Download PDF

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WO2020113902A1
WO2020113902A1 PCT/CN2019/086092 CN2019086092W WO2020113902A1 WO 2020113902 A1 WO2020113902 A1 WO 2020113902A1 CN 2019086092 W CN2019086092 W CN 2019086092W WO 2020113902 A1 WO2020113902 A1 WO 2020113902A1
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ceramide
microcapsules
preparation
regenerated cellulose
cellulose fiber
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PCT/CN2019/086092
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English (en)
French (fr)
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毛军
陈红霞
沈玲
袁洪胜
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江苏金太阳纺织科技股份有限公司
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Priority to AU2019394406A priority Critical patent/AU2019394406A1/en
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
    • D01F2/06—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from viscose
    • D01F2/08—Composition of the spinning solution or the bath

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  • the invention belongs to the technical field of textiles, and specifically relates to a regenerated cellulose fiber containing ceramide microcapsules and a preparation method thereof.
  • the production of functional textiles is roughly divided into two technologies: one is the functional finishing of the fabric, mainly in the process of finishing the fabric after the fabric is impregnated, dried or coated, the auxiliary with special functions is sorted into On the fabric; the second is the functional modification of the fiber, which means that the fiber is processed in the fiber production process, and the auxiliary agents with special functions are arranged into the fiber or the fiber surface; relatively speaking, the latter has the lasting effect The sex is better, the corresponding cost is also higher.
  • CN101343780A discloses a viscose fiber containing aloe and a preparation method thereof.
  • the fiber is prepared by wet spinning after mixing aloe extract with viscose spinning liquid, and the aloe viscose fiber is prepared by wet spinning.
  • the disadvantage of this method is that The aloe extract is directly added to the viscose spinning solution for blending.
  • Patent No. CN1664186A discloses a method for preparing aloe viscose fiber.
  • aloe gel is directly added to the viscose spinning solution for wet spinning to obtain aloe viscose fiber.
  • the method is also in strong alkali
  • the high-concentration alkaline solution will destroy the physical and chemical properties of aloe gel, thereby affecting the performance of aloe viscose fibers.
  • the purpose of the present invention is to provide a regenerated cellulose fiber containing ceramide microcapsules and a preparation method thereof, using microcapsule coating technology to prepare ceramide into microcapsules, and then adding the microcapsules to the viscose spinning solution Get viscose fiber with skin care moisturizing.
  • a regenerated cellulose fiber containing ceramide microcapsules the raw materials include viscose spinning solution and ceramide microcapsules, the mass of ceramide microcapsules accounts for 2% to 4% of the nail fiber content in the viscose spinning solution;
  • the core of the ceramide microcapsule includes ceramide and glycerin.
  • the mass fraction of ceramide in the capsule core is 5% to 25%, and the rest is glycerin, and the sum of the mass fractions of the two is 100%.
  • ceramide is ceramide of natural origin.
  • the wall material of the ceramide microcapsule is gelatin.
  • the raw material of the regenerated cellulose fiber further includes a dispersant, and the mass of the dispersant is 1% to 3% of the mass of the ceramide microcapsules.
  • the dispersant is selected from one of sodium hexametaphosphate, glyceryl stearate or stearate.
  • the particle diameter of the ceramide microcapsules is 0.1-1 ⁇ m.
  • the above preparation method of regenerated cellulose fiber includes the following steps:
  • Step 2 The preparation of ceramide microcapsules is prepared by the multiphase emulsion method
  • Step 3 Preparation of ceramide microcapsule dispersion liquid
  • Step 4 Mix the ceramide microcapsule dispersion liquid with the viscose spinning solution and perform wet spinning to obtain.
  • the preparation of the ceramide microcapsules includes the following steps:
  • microcapsules are prepared by using a homogeneous mixture of ceramide and glycerin as the core material, and gelatin as the wall material.
  • the prepared microcapsules are internally filled with a mixture of ceramide and glycerin, and are coated with the protein material of gelatin as the wall material. Inside the capsule, a skin-like structure is formed, which has a good moisturizing effect.
  • the regenerated cellulose fiber containing ceramide microcapsules is prepared by wet spinning, and after the modified fiber is woven into a fabric or other products, the fiber type
  • the skin structure will form a "second skin" on the outer layer of human skin, which plays a double protective role for human skin, giving fibers and fabrics a more direct function, greatly enhancing the added value of fibers and their products.
  • Ceramide is a type of phospholipid with ceramide as its skeleton. Mainly exists in the cell membrane and intercellular matrix in the stratum corneum. Ceramide is produced by the hydrolysis of sphingomyelin of the cell membrane or organelle membrane by sphingomyelinase. The ceramide structure contains a large number of hydrophilic groups and has a good affinity for water.
  • Ceramide can promote epidermal hydration, enhance the cohesion of epidermal cells, prevent skin dryness and desquamation, and make skin smooth and elastic; it can form a double-layered bed board structure in keratinocytes, effectively preventing epidermal water from spreading; ceramide can activate senescent cells, Promote epidermal cell division and basal cell regeneration, strengthen the skin barrier (or isolation protection), prevent external irritant substances from invading, known as "the king of moisturizing", 16 times the moisturizing effect of hyaluronic acid.
  • the invention simulates the skin structure innovatively. After mixing ceramide and glycerin, the microcapsule is coated with gelatin as the wall material.
  • Gelatin is a protein, similar to the protein in the keratin of human skin, so it can form a skin-like structure.
  • Human skin plays the role of secondary protection; at the same time, ceramide will be slowly released to the surface of the skin through microcapsules, which can penetrate deep into the epidermis, and can promote dry skin to regain the ability to retain moisture, so it has outstanding moisturizing effect.
  • Figure 1 is the preparation process of viscose spinning solution in Examples 1 to 3.
  • the nail fiber (a type of cellulose) mentioned in the present invention is also called ⁇ -cellulose, and refers to the part of cellulose raw material that is not dissolved after being immersed in 17.5% to 18% sodium hydroxide solution at 20°C for 45 minutes .
  • the raw material is cotton pulp with a polymerization degree of 500-600, and its nail fiber content is greater than 90%, and the rubber is prepared according to the process shown in Figure 1:
  • the nail fiber content of the viscose spinning solution manufactured according to the above process is 8.9%, the NaOH mass fraction is 6.0, the viscosity is (falling ball method) 59s, and the degree of maturity is (10% NH 4 Cl) 8.8 mL.
  • Ball drop method The time required for a 2mm steel ball to fall from the viscose solution by 20cm.
  • a proportional pump is used to quantitatively add the microcapsule dispersion to the viscose solution to be used, and mix it evenly.
  • the microcapsule dispersion liquid was injected into the dynamic mixer at a rate of 6 liters/min using a syringe pump.
  • the flow rate of the viscose solution was 50 liters/min. It was allowed to stand at room temperature for 1 hour. Among them, the mass of the microcapsule is 2% of the weight of the nail fiber.
  • the mixed solution of microcapsules and viscose is sent to the wet spinning process for spinning.
  • the spinneret specifications are 21000 holes ⁇ 0.06 mm, the spinning speed is 55 m/min, the coagulation bath temperature is 52°C, and the plasticizing bath temperature is 95°C.
  • the composition of the coagulation bath is: 115 g/L sulfuric acid, 325 g/L sodium sulfate, and 11.5 g/L zinc sulfate.
  • the raw material is cotton pulp with a polymerization degree of 500-600, and its nail fiber content is greater than 90%, and the rubber is prepared according to the process shown in Figure 1:
  • the viscose spinning solution has a 8.9% nail fiber content, a NaOH mass fraction of 5.8, a viscosity (falling ball method) of 60 s, and a maturity of (10% NH 4 Cl) 8.7 mL.
  • Ball drop method The time required for a 2mm steel ball to fall from the viscose solution by 20cm.
  • a proportional pump is used to quantitatively add the microcapsule dispersion to the viscose solution to be used, and mix it evenly.
  • the microcapsule dispersion liquid was injected into the dynamic mixer at a rate of 7 liters/min using a syringe pump, the flow rate of the viscose solution was 50 liters/min, and it was allowed to stand at room temperature for 1 hour. Among them, the mass of the microcapsules is 3% of the weight of the nail fiber.
  • the mixed solution of microcapsules and viscose is sent to the wet spinning process for spinning.
  • the spinneret specifications are 21000 holes ⁇ 0.06 mm, the spinning speed is 55 m/min, the coagulation bath temperature is 52°C, and the plasticizing bath temperature is 95°C.
  • the composition of the coagulation bath is: 115 g/L sulfuric acid, 325 g/L sodium sulfate, and 11.5 g/L zinc sulfate.
  • the raw material is cotton pulp with a polymerization degree of 500-600, and its nail fiber content is greater than 90%, and the rubber is prepared according to the process shown in Figure 1:
  • the viscose spinning solution has a 8.9% nail fiber content, a NaOH mass fraction of 6.3, a viscosity (falling ball method) of 62 s, and a maturity of (10% NH 4 Cl) of 8.9 mL.
  • Ball drop method The time required for a 2mm steel ball to fall from the viscose solution by 20cm.
  • a proportional pump is used to quantitatively add the microcapsule dispersion to the viscose solution to be used, and mix it evenly.
  • the microcapsule dispersion liquid was injected into the dynamic mixer at a rate of 8 liters/min using a syringe pump.
  • the flow rate of the viscose solution was 50 liters/min. It was allowed to stand at room temperature for 1 hour. Among them, the mass of the microcapsules is 4% of the weight of the nail fiber.
  • the mixed solution of microcapsules and viscose is sent to the wet spinning process for spinning.
  • the spinneret specifications are 21000 holes ⁇ 0.06 mm, the spinning speed is 55 m/min, the coagulation bath temperature is 52°C, and the plasticizing bath temperature is 95°C.
  • the composition of the coagulation bath is: 115 g/L sulfuric acid, 325 g/L sodium sulfate, and 11.5 g/L zinc sulfate.
  • Example 1 The difference from Example 1 is that no ceramide nanocapsules are added to the spinning solution.

Abstract

本发明公开了一种含有神经酰胺微胶囊的再生纤维素纤维及其制备方法。该再生纤维素纤维的原料包括粘胶纺丝液和神经酰胺微胶囊，所述神经酰胺微胶囊的囊芯包括神经酰胺和甘油。其制备方法是将神经酰胺微胶囊分散液与粘胶纺丝液混合后进行湿法纺丝，即得。本发明利用微胶囊包覆技术将神经酰胺制备成微胶囊，再将微胶囊加入到粘胶纺丝液中制备得到具有护肤保湿粘胶纤维。

Description

一种含有神经酰胺微胶囊的再生纤维素纤维及其制备方法 技术领域
本发明属于纺织品技术领域，具体涉及一种含有神经酰胺微胶囊的再生纤维素纤维及其制备方法。
背景技术
随着经济的不断发展和国内消费水平的不断升级，人们对纺织品的需求也不断增加，尤其是具有特殊功能的纺织品，需求是日趋高涨。因此，在最近十几年各类功能纺织品在国内市场上是层出不穷，诸如抗菌防螨、护肤保湿、安全防护等各种产品。
目前，生产功能纺织品大致分为两种技术：一是对面料进行功能化整理，主要是在面料后整理的过程面料经过浸渍、烘干或涂层的方法，将具有特殊功能的助剂整理到面料上；二是对纤维进行功能化改性，是指在纤维生产过程对纤维进行处理，将具有特殊功能的助剂整理到纤维内部或者纤维表面；相对而言，后者具有的效果的持久性更好，相应的成本也更高。
近几年，随着人们对健康生活的不断追求，护肤保湿的各类产品越来越多地受到消费者的喜爱，而在纺织领域各类护肤保湿的功能性面料也是大量面世，无论是纤维改性方面还是功能后整理的面料方面。CN101343780A公开了一种含有芦荟的粘胶纤维及其制备方法，该纤维是将芦荟提取液直接与粘胶纺丝液混合后经过湿法纺丝制备得到芦荟粘胶纤维，该方法的缺点是将芦荟提取液直接加入粘胶纺丝液共混，芦荟中含有的维生素和氨基酸等物质会在强碱的条件下被破坏，导致有效物质的大量流失，无法得到理想的护肤保湿的效果。专利号为CN1664186A公开了一种芦荟粘胶纤维的制备方法，该方法将芦荟凝胶直接加入到粘胶纺丝液中进行湿法纺丝制备得到芦荟粘胶纤维，该方法同样是在强碱的情况下将芦荟凝胶直接加入到纺丝液中，高浓碱液会破坏芦荟凝胶的物理化学性质，从而影响芦荟粘胶纤维的各项性能。
发明内容
本发明的目的是提供一种含有神经酰胺微胶囊的再生纤维素纤维及其制备方法，利用微胶囊包覆技术将神经酰胺制备成微胶囊，再将微胶囊加入到粘胶纺丝液中制备得到具有护肤保湿粘胶纤维。
一种含有神经酰胺微胶囊的再生纤维素纤维，原料包括粘胶纺丝液和神经酰胺微胶囊，神经酰胺微胶囊的质量占粘胶纺丝液中甲纤含量2％～4％；
所述神经酰胺微胶囊的囊芯包括神经酰胺和甘油。
进一步地，所述囊芯中神经酰胺的质量分数为5％～25％，其余为甘油，两者的质量分数 之和为100％。
进一步地，所述神经酰胺为天然来源的神经酰胺。
进一步地，所述神经酰胺微胶囊的壁材为明胶。
进一步地，所述再生纤维素纤维的原料还包括分散剂，分散剂的质量为神经酰胺微胶囊质量的1％～3％。
进一步地，所述分散剂选自六偏磷酸钠、硬脂酸甘油酯或硬脂酸盐中的一种。
进一步地，所述神经酰胺微胶囊的粒径为0.1～1μm。
上述再生纤维素纤维的制备方法，包括以下步骤：
步骤1，粘胶纺丝液的制备；
步骤2，神经酰胺微胶囊的制备，采用复相乳液法制备；
步骤3，神经酰胺微胶囊分散液的制备；
步骤4，将神经酰胺微胶囊分散液与粘胶纺丝液混合后进行湿法纺丝，即得。
进一步地，所述神经酰胺微胶囊的制备包括以下步骤：
a)芯材乳液的制备；
b)壁材乳液的制备；
c)壁材乳液和芯材乳液的混合，烘干及研磨。
有益效果：
1、本发明以神经酰胺与甘油均匀混合物作为芯材，明胶作为壁材制备微胶囊，制备好的微胶囊内部是神经酰胺和甘油的混合物，并包覆以明胶的蛋白质材料为壁材的微胶囊内，形成了一个类似皮肤的结构，该结构具有较好的保湿效果。将给微胶囊与粘胶纺丝液共混后，经湿法纺丝制备得到含有神经酰胺微胶囊的再生纤维素纤维，经过改性后的纤维织造成织物或者其他制品后，该纤维的类皮肤结构会在人体皮肤外层形成“第二皮肤”，对人体皮肤起到双层保护的作用，赋予纤维和织物更加直接的功能，极大地提升了纤维及其制品的附加值。
2、神经酰胺是以神经酰胺为骨架的一类磷脂。主要存在于角质层中细胞膜和细胞间基质中。神经酰胺是细胞膜或细胞器膜的鞘磷脂被鞘磷脂酶水解后产生的。神经酰胺结构中含有大量的亲水性基团，对水有较好的亲和作用。神经酰胺可以促进表皮水合作用，增进表皮细胞凝聚力，防止皮肤干燥脱屑，使肌肤光滑有弹性；能在角细胞中形成床板双层结构，有效防止表皮水分散发；神经酰胺能激活衰老细胞，促进表皮细胞分裂和基底层细胞再生，增强皮肤屏障(或隔离保护)作用，防止外界刺激物质侵入，有“补水之王”之称，是透明质酸保湿功效的16倍。本发明创新模拟皮肤结构，将神经酰胺与甘油混合后，再以明胶作为壁材进行微胶囊包覆，明胶属于蛋白质，跟人体皮肤中角质中的蛋白类似，因此可形成类似皮肤 的结构，对人体皮肤起到二次保护的作用；同时神经酰胺还会透过微胶囊缓释到皮肤表面，能渗透至表皮深处，能促使干性皮肤重新获得对水分的保持能力，故具有突出的保湿效果。
附图说明
图1为实施例1至3中粘胶纺丝液的制备工艺路线。
具体实施方式
下面结合具体实施例对本发明的技术方案作进一步说明。
本发明中所述的甲纤(甲种纤维素)又称α-纤维素，是指纤维素原料在20℃浸于17.5％～18％的氢氧化钠溶液中经过45分钟后不溶解的部分。
实施例1
粘胶纺丝液的制备：
原料为聚合度为500-600的棉浆粕，其甲纤含量大于90％，且按照图1所示的工艺路线制胶：
按照上述工艺制造而成粘胶纺丝液甲纤含量为8.9％，NaOH质量分数为6.0，粘度为(落球法)59s，熟程度为(10％NH 4Cl)8.8mL。
落球法：2mm钢球从所述粘胶溶液中下落20cm所需的时间。
微胶囊的制备：
在反应釜1内配制质量分数为10％神经酰胺溶液，溶剂为甘油，乳化剂的质量分数为1％，搅拌均匀后静置；在反应釜2内配制质量分数为5％明胶溶液，溶剂为水，乳化剂的质量分数为1％，搅拌均匀后静置；将反应釜1中的芯材乳液加入到反应釜2中，搅拌均匀后，在70℃的条件下烘干，后研磨得到神经酰胺微胶囊粉末，微胶囊粉末的粒径要求为0.1～1μm。
粘胶溶液与纳米微胶囊分散乳液的混合：
采用比例泵定量地将微胶囊分散液加入上述待用的粘胶溶液中，并混合均匀。微胶囊分散液采用注射泵以6升/min的速度注射到动态混合器中，粘胶溶液的流量为50升/min，常温下静置1h。其中，微胶囊的质量为甲纤重量的2％。
湿法纺丝：
将微胶囊与粘胶的混合溶液送入湿法纺丝工序进行纺丝。喷丝头规格为21000孔×0.06mm，纺丝速度为55m/min，凝固浴温度为52℃，塑化浴温度为95℃。凝固浴组成为：硫酸115g/L，硫酸钠325g/L，硫酸锌11.5g/L。
实施例2
粘胶纺丝液的制备：
原料为聚合度为500-600的棉浆粕，其甲纤含量大于90％，且按照图1所示的工艺路线 制胶：
按照上述工艺制造而成粘胶纺丝液甲纤含量为8.9％，NaOH质量分数为5.8，粘度为(落球法)60s，熟程度为(10％NH 4Cl)8.7m L。
落球法：2mm钢球从所述粘胶溶液中下落20cm所需的时间。
微胶囊的制备：
在反应釜1内配制质量分数为15％神经酰胺溶液，溶剂为甘油，乳化剂的质量分数为2％，搅拌均匀后静置；在反应釜2内配制质量分数为8％明胶溶液，溶剂为水，乳化剂的质量分数为1％，搅拌均匀后静置；将反应釜1中的芯材乳液加入到反应釜2中，搅拌均匀后，在80℃的条件下烘干，后研磨得到神经酰胺微胶囊粉末，微胶囊粉末的粒径要求为0.1～1μm。
粘胶溶液与纳米微胶囊分散乳液的混合：
采用比例泵定量地将微胶囊分散液加入上述待用的粘胶溶液中，并混合均匀。微胶囊分散液采用注射泵以7升/min的速度注射到动态混合器中，粘胶溶液的流量为50升/min，常温下静置1h。其中，微胶囊的质量为甲纤重量的3％。
湿法纺丝：
将微胶囊与粘胶的混合溶液送入湿法纺丝工序进行纺丝。喷丝头规格为21000孔×0.06mm，纺丝速度为55m/min，凝固浴温度为52℃，塑化浴温度为95℃。凝固浴组成为：硫酸115g/L，硫酸钠325g/L，硫酸锌11.5g/L。
实施例3
粘胶纺丝液的制备：
原料为聚合度为500-600的棉浆粕，其甲纤含量大于90％，且按照图1所示的工艺路线制胶：
按照上述工艺制造而成粘胶纺丝液甲纤含量为8.9％，NaOH质量分数为6.3，粘度为(落球法)62s，熟程度为(10％NH 4Cl)8.9m L。
落球法：2mm钢球从所述粘胶溶液中下落20cm所需的时间。
微胶囊的制备
在反应釜1内配制质量分数为20％神经酰胺溶液，溶剂为甘油，乳化剂的质量分数为3％，搅拌均匀后静置；在反应釜2内配制质量分数为10％明胶溶液，溶剂为水，乳化剂的质量分数为3％，搅拌均匀后静置；将反应釜1中的芯材乳液加入到反应釜2中，搅拌均匀后，在80℃的条件下烘干，后研磨得到神经酰胺微胶囊粉末，微胶囊粉末的粒径要求为0.1～1μm。
粘胶溶液与纳米微胶囊分散乳液的混合：
采用比例泵定量地将微胶囊分散液加入上述待用的粘胶溶液中，并混合均匀。微胶囊分散液采用注射泵以8升/min的速度注射到动态混合器中，粘胶溶液的流量为50升/min，常温下静置1h。其中，微胶囊的质量为甲纤重量的4％。
湿法纺丝：
将微胶囊与粘胶的混合溶液送入湿法纺丝工序进行纺丝。喷丝头规格为21000孔×0.06mm，纺丝速度为55m/min，凝固浴温度为52℃，塑化浴温度为95℃。凝固浴组成为：硫酸115g/L，硫酸钠325g/L，硫酸锌11.5g/L。
对照例1
与实施例1的区别在于：纺丝液中不加入神经酰胺纳米微胶囊。
纤维的各项性能以及由该纤维制成的面料的保湿性能的测试结果如下表所示：
项目 实施例1 实施例2 实施例3 对照例1
纤度(dtex) 1.67 1.63 1.71 1.63
干强(cN/dtex) 2.26 2.28 2.23 2.31
湿强(cN/dtex) 1.35 1.37 1.42 1.39
干伸(％) 16.3 17.9 17.1 18.5
面料保水率2h(％) 19.6 18.9 19.3 12.5
面料保水率4h(％) 16.2 15.8 16.1 11.9
由上表的结果可以得出结论：通过物理混合的方式将神经酰胺纳米微胶囊加入到粘胶纺丝液中，经纺丝得到的纤维各项基本性能良好，由该纤维制成的面料的保水率明显高于常规的粘胶纤维。

Claims (9)

  1. 一种含有神经酰胺微胶囊的再生纤维素纤维，其特征在于：原料包括粘胶纺丝液和神经酰胺微胶囊，神经酰胺微胶囊的质量占粘胶纺丝液中甲纤含量2％～4％；
    所述神经酰胺微胶囊的囊芯包括神经酰胺和甘油。
  2. 根据权利要求1所述的含有神经酰胺微胶囊的再生纤维素纤维，其特征在于：所述囊芯中神经酰胺的质量分数为5％～25％，其余为甘油，两者的质量分数之和为100％。
  3. 根据权利要求1所述的含有神经酰胺微胶囊的再生纤维素纤维，其特征在于：所述神经酰胺为天然来源的神经酰胺。
  4. 根据权利要求1所述的含有神经酰胺微胶囊的再生纤维素纤维，其特征在于：所述神经酰胺微胶囊的壁材为明胶。
  5. 根据权利要求1所述的含有神经酰胺微胶囊的再生纤维素纤维，其特征在于：所述再生纤维素纤维的原料还包括分散剂，分散剂的质量为神经酰胺微胶囊质量的1％～3％。
  6. 根据权利要求5所述的含有神经酰胺微胶囊的再生纤维素纤维，其特征在于：所述分散剂选自六偏磷酸钠、硬脂酸甘油酯或硬脂酸盐中的一种。
  7. 根据权利要求1所述的含有神经酰胺微胶囊的再生纤维素纤维，其特征在于：所述神经酰胺微胶囊的粒径为0.1～1μm。
  8. 权利要求1所述的再生纤维素纤维的制备方法，其特征在于：包括以下步骤：
    步骤1，粘胶纺丝液的制备；
    步骤2，神经酰胺微胶囊的制备，采用复相乳液法制备；
    步骤3，神经酰胺微胶囊分散液的制备；
    步骤4，将神经酰胺微胶囊分散液与粘胶纺丝液混合后进行湿法纺丝，即得。
  9. 根据权利要求8所述的制备方法，其特征在于：所述神经酰胺微胶囊的制备包括以下步骤：
    a)芯材乳液的制备；
    b)壁材乳液的制备；
    c)壁材乳液和芯材乳液的混合，烘干及研磨。
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