阅读说明：本技术 一种纺织用高强度麻纤维的制备方法 (Preparation method of high-strength fibrilia for spinning ) 是由 田丽 于 2019-11-21 设计创作，主要内容包括：本发明公开了一种纺织用高强度麻纤维的制备方法,包括如下步骤：S1、麻纤维清洗处理；S2、蒸汽爆破处理；S3、电晕处理；S4、物质称取；S5、混合处理液制备；S6、浸泡超声处理；S7、真空干燥处理。本发明提供了一种麻纤维的制备方法,其工艺简单,各步骤搭配合理,制得的麻纤维具有强度高、比表面积大、吸附能力好、可加工性强的特点。(The invention discloses a preparation method of high-strength fibrilia for spinning, which comprises the following steps: s1, carrying out fibrilia cleaning treatment; s2, performing steam explosion treatment; s3, corona treatment; s4, weighing the materials; s5, preparing a mixed treatment solution; s6, soaking and ultrasonic processing; and S7, vacuum drying. The invention provides a preparation method of fibrilia, which has simple process and reasonable collocation of the steps, and the prepared fibrilia has the characteristics of high strength, large specific surface area, good adsorption capacity and strong processability.)

1. A preparation method of high-strength fibrilia for spinning is characterized by comprising the following steps:

s1, firstly, immersing the fibrilia into clear water for soaking for 1-2 hours, continuously stirring the fibrilia during the soaking, and taking out the fibrilia for later use after the soaking is finished;

s2, putting the fibrilia processed in the step S1 into a steam explosion tank for steam explosion treatment, taking out after 3-5 min, washing the fibrilia with deionized water once, and drying for later use;

s3, placing the fibrilia treated in the step S2 into a corona treatment instrument for corona treatment, and taking out for standby after 10-15 min;

s4, weighing the following substances in parts by weight: 6-8 parts of dioctyl phthalate, 10-12 parts of lactic acid, 3-5 parts of alkyl silicone oil, 12-15 parts of sodium carboxymethylcellulose, 40-45 parts of epoxy resin, 5-7 parts of fatty alcohol-polyoxyethylene ether, 3-6 parts of dodecyl trimethyl ammonium bromide, 50-55 parts of ethyl acetate, 8-10 parts of chitosan, 2-4 parts of nano titanium dioxide and 750-800 parts of deionized water;

s5, putting all the substances weighed in the step S4 into a stirring tank together, and stirring at a high speed for 1-1.5 hours to obtain a mixed treatment liquid for later use;

s6, immersing the fibrilia treated in the step S3 into the mixed treatment liquid prepared in the step S5, and then carrying out ultrasonic treatment for 25-30 min and taking out for later use;

and S7, washing the fibrilia treated in the step S6 with deionized water, and then putting the fibrilia into a vacuum drying oven for drying for 1-2 h and taking out.

2. The method of claim 1, wherein the hemp fiber of step S1 is hemp, ramie, sisal or kenaf.

3. The preparation method of high-strength fibrilia for textile according to claim 1, wherein the steam explosion treatment in step S2 is carried out by putting the fibrilia into a steam explosion tank, introducing high-temperature steam with a temperature of 102-106 ℃ into the steam explosion tank, increasing the pressure in the steam explosion tank to 2-2.5 MPa, carrying out heat preservation and pressure maintaining treatment for 3-5 min, and then unloading the steam explosion tank to normal temperature and pressure within 30S.

4. The method for preparing high-strength fibrilia for textile according to claim 1, wherein the output power in the corona treatment instrument is controlled to be 10-12 kW during the corona treatment in the step S3.

5. The method for preparing high-strength fibrilia for textile according to claim 1, wherein the particle size of the nano titanium dioxide in step S4 is 20-60 nm.

6. The method for preparing high-strength fibrilia for textile according to claim 1, wherein the high-speed stirring treatment in step S5 is performed at a rotation speed of 2000-2600 rpm.

7. The method for preparing high-strength fibrilia for textile according to claim 1, wherein the mixed treatment liquid in the step S6 is 7-8 times of the total mass of the fibrilia; and controlling the frequency of ultrasonic waves to be 500-600 kHz during ultrasonic treatment.

8. The method for preparing a textile high-strength fibrilia as claimed in claim 1, wherein the temperature in the vacuum drying oven is controlled to be 70-75 ℃ during the drying process in step S7.

Technical Field

The invention belongs to the technical field of textile fiber processing and treatment, and particularly relates to a preparation method of high-strength fibrilia for spinning.

Background

China is the country with the most abundant hemp fiber resources, and the development of the hemp textile industry is marked to enter the prosperous period after the international development of 'hot hemp products' in the early 80 s of the 20 th century. At present, the production, processing and sale of fibrilia and products thereof occupy important positions in national economy of China. China has more than 800 hemp textile, printing and dyeing enterprises. The fixed assets are worth breaking through 30 billion yuan, and the total demand of hemp fibers is over 100 ten thousand tons.

Hemp (Cannabis sativa L.) is an annual crop, once an important fiber, oil, and grain crop for humans, and originates in China or other countries in China or China. Then gradually spread to countries and regions such as Europe, south America, Africa and the like, the spread to Chile in 1545, and the American hemp is popularized with the arrival of new immigration. The hemp is mainly used in China mainly by fiber. The traditional utilization modes mainly comprise rope making, gunny bag making and gunny cloth weaving. The content of the ramie colloid is very high and reaches more than 40 percent, so the difficulty of degumming the ramie is increased. The quality of the degumming degree can directly influence the ramie spinning, weaving and the processing after dyeing and finishing. Especially, the hemp textile is developed to the present day, the market requirements for the products are changed from the original roughness and novelty to the delicacy and comfort, which provides a greater challenge for the hemp degumming process which is not completely perfect. The traditional degumming methods of ramie are dew degumming and water retting degumming, the water retting degumming effect is good, but the water retting degumming method brings serious pollution to water bodies. The american state institute of alawa has studied the rapid degumming of ramie under controlled conditions, which can be accomplished after 36 hours of treatment. In 1970, sweden developed a continuous degumming plant for ramie which can process 150 tons of ramie per day to produce 50 tons of ramie fibers, but all of these processes have difficulty in achieving "moderate" degumming and avoiding contamination. The research on microbial degumming has been carried out abroad since the 50 s, and the research has been carried out in the 70 s. Although the microbial degumming of the hemp skin has been developed for a long time, the requirements of industrial production places cannot be met, the problems of low degumming rate and high treatment cost exist, and a new technical breakthrough is urgently needed.

The prior art changes the traditional degumming treatment mode, such as the application numbers: CN200510114926.4 discloses a degumming method for hemp fiber and the hemp fiber produced by the same, wherein the hemp fiber is degummed by steam explosion, which improves the degumming effect and quality, enhances the strength of the fiber, and has good effect. However, the strength of the fiber produced in this way cannot meet the requirements of the existing production, and the quality of the fiber needs to be further improved.

Disclosure of Invention

The invention aims to provide a preparation method of high-strength fibrilia for spinning aiming at the existing problems.

The invention is realized by the following technical scheme:

a preparation method of high-strength fibrilia for spinning comprises the following steps:

s1, firstly, immersing the fibrilia into clear water for soaking for 1-2 hours, continuously stirring the fibrilia during the soaking, and taking out the fibrilia for later use after the soaking is finished;

s2, putting the fibrilia processed in the step S1 into a steam explosion tank for steam explosion treatment, taking out after 3-5 min, washing the fibrilia with deionized water once, and drying for later use;

s3, placing the fibrilia treated in the step S2 into a corona treatment instrument for corona treatment, and taking out for standby after 10-15 min;

s4, weighing the following substances in parts by weight: 6-8 parts of dioctyl phthalate, 10-12 parts of lactic acid, 3-5 parts of alkyl silicone oil, 12-15 parts of sodium carboxymethylcellulose, 40-45 parts of epoxy resin, 5-7 parts of fatty alcohol-polyoxyethylene ether, 3-6 parts of dodecyl trimethyl ammonium bromide, 50-55 parts of ethyl acetate, 8-10 parts of chitosan, 2-4 parts of nano titanium dioxide and 750-800 parts of deionized water;

s5, putting all the substances weighed in the step S4 into a stirring tank together, and stirring at a high speed for 1-1.5 hours to obtain a mixed treatment liquid for later use;

s6, immersing the fibrilia treated in the step S3 into the mixed treatment liquid prepared in the step S5, and then carrying out ultrasonic treatment for 25-30 min and taking out for later use;

and S7, washing the fibrilia treated in the step S6 with deionized water, and then putting the fibrilia into a vacuum drying oven for drying for 1-2 h and taking out.

Further, the hemp fiber in step S1 is hemp, ramie, sisal or kenaf fiber.

Further, in the step S2, during the steam explosion treatment, the fibrilia is placed into a steam explosion tank, then high-temperature steam with a temperature of 102-106 ℃ is introduced into the steam explosion tank, meanwhile, the pressure in the steam explosion tank is increased to 2-2.5 MPa, and after the heat preservation and pressure maintaining treatment is performed for 3-5 min, the steam explosion tank is unloaded to normal temperature and normal pressure within 30S and then taken out.

Further, in the step S3, the output power in the corona treatment instrument is controlled to be 10-12 kW during the corona treatment.

Further, the particle size of the nano titanium dioxide in the step S4 is 20-60 nm.

Further, the rotation speed of the stirring is controlled to be 2000 to 2600 rpm in the high-speed stirring treatment in step S5.

Further, the mixed treatment liquid in the step S6 is 7-8 times of the total mass of the fibrilia; and controlling the frequency of ultrasonic waves to be 500-600 kHz during ultrasonic treatment.

Further, the temperature in the vacuum drying oven is controlled to be 70 to 75 ℃ during the drying process in step S7.

The invention changes the processing and preparation method of the fibrilia, effectively improves the quality of the fibrilia, wherein the fibrilia is cleaned and soaked firstly, the surface is cleaned, then the steam explosion treatment is carried out, the organizational structure of the fibrilia can be effectively loosened by the steam explosion, the hemicellulose is promoted to be degraded into soluble sugar, simultaneously, the lignin is softened and partially degraded, the colloid is removed, the specific surface area and the processability of the fibrilia are improved, then the corona treatment is carried out, the surface of the fibrilia is treated by a special energy corona field, the surface activity and the active group content of the fiber can be activated, the subsequent processing and grafting treatment is facilitated, then the fibrilia is soaked by a specially prepared mixed treatment liquid, and the epoxy resin, the lactic acid and the like in the mixed treatment liquid are mixed under the auxiliary action of ultrasonic waves, The chitosan and other components are well compounded into a film and fixed on the surface of the fibrilia, so that the strength and other properties of the fibrilia are enhanced and modified, the added nano titanium dioxide can be well embedded and grafted on the surface of the compounded film and the fibrilia, the further enhancement of the fiber is realized, and the strength and other properties of the fibrilia are finally improved.

Compared with the prior art, the invention has the following advantages:

the invention provides a preparation method of fibrilia, which has simple process and reasonable collocation of the steps, and the prepared fibrilia has the characteristics of high strength, large specific surface area, good adsorption capacity and strong processability, and has great market competitiveness and production benefit.

Drawings

FIG. 1 is an SEM photograph of a corresponding fiber of example 2 of the present invention.

FIG. 2 is an SEM photograph of corresponding fibers of comparative example 1 of the present invention.

FIG. 3 is an SEM photograph of corresponding fibers of comparative example 2 of the present invention.

FIG. 4 is an SEM photograph of corresponding fibers of comparative example 3 of the present invention.

FIG. 5 is an SEM photograph of corresponding fibers of comparative example 4 of the present invention.

Detailed Description