CN105113223A - Modified down feather with improved warm keeping property and preparation method of modified down feather - Google Patents

Abstract

The invention discloses modified down feather with an improved warm keeping property and a preparation method of the modified down feather. The warm keeping property is improved by grafting positive ions in surfaces of down feather fibers through a crosslinking agent. By the preparation method, the down feather with good warm keeping property can be obtained. The warm keeping property of the down feather before and after modification is measured by a warm keeping instrument. A test result shows that the warm keeping property of the modified down feather is higher than that of original down feather by 2-10% or so under the condition that conventional indexes such as color and turbidity of the original down feather are not affected. Moreover, the technological method is simple and easy to operate; and batch production is facilitated.

Description

A kind of modified down with improved thermal insulation rate and preparation method thereof

technical field

The invention belongs to the technical field of down fiber processing, in particular to a modified down with improved thermal insulation rate and a preparation method thereof.

Background technique

As a natural thermal insulation material, down has the characteristics of softness, light weight, and good warmth retention. There are almost no other fiber materials that can replace it. At the same time, the chemical properties of down are stable, and it has special warmth retention, water resistance, wrinkle resistance, softness, smoothness and lightness.

The reason why down has such excellent thermal performance is inseparable from its unique bifurcated structure and morphological structure. The inside of the down fiber is the same as other protein fibers. It is a polypeptide formed by condensation of amino acids. The peptide chain knobs form a core structure and form a cavity. In addition, a large number of small fibers with the same structure inside the down repel each other, so that the down has a high quality. warmth retention.

The utilization rate of down as a thermal insulation material is low, and the amount of down filling in cold-proof clothing is relatively large. With the new "light and thin" trend of clothing and the saturation of down production, as well as the impact of raising animals on water resources and land resources A lot of pollution, which puts forward higher requirements for down fiber in terms of warmth retention.

For thermal fiber, many patents are involved. For example, Chinese patent CN102720002A discloses a composite thermal material natural down wadding and its manufacturing process. The composite thermal material natural down wadding is mainly made of duck down or goose down. down and mixed fiber, wherein the mixed fiber is a mixture of hot-melt fiber and tencel fiber with a weight ratio of 13-18:6-15, but the heat retention rate is reduced compared with pure down . Chinese patent CN103469421A discloses a soft and warm fabric fiber, which is made of soft fabric fibers and warm fabric fibers blended and woven. The soft fabric fibers include muslin fibers and poplin fibers, and the warm fabric fibers include 100% merino. Fine wool fibers and plush fibers. The soft and warm fabric fiber of the invention is formed by blending and weaving the soft fabric fiber and the warm fabric fiber. Chinese patent CN103556282A discloses a preparation method of a novel warm-type polypropylene nitrile hollow fiber. The PAN hollow fiber is prepared by plasticizing and spinning, and the polypropylene nitrile powder, plasticizer and heat stabilizer are mixed and pelletized; Spinning is performed in a melt spinning machine to obtain hollow fibers. This kind of hollow fiber is better than ordinary fiber in terms of warmth retention, but it cannot be compared with down. Chinese patent CN104358136A discloses a method for improving the heat retention of down fibers by grafting metal ions. The first step is to allow the down to react with tannic acid, and then add masking agent and zirconium salt in the second step. To improve the thermal insulation performance of down, the two-step process is more complicated, has higher requirements on pH, longer time, and harsh conditions.

Contents of the invention

In order to solve the deficiencies in the prior art, the purpose of the present invention is to provide a modified down with improved heat retention rate and a preparation method thereof. Compared with the original down, the down feather obtained by the preparation method has improved heat retention rate. The preparation method process conditions, The operation methods are all very simple and convenient for mass production. It is expected to increase the utilization rate of natural down and reduce the dependence on down production.

The technical solution of the present invention to solve the technical problem is to design a modified down and its preparation method for improving the heat retention rate, which is characterized in that the operation steps are as follows: (1) weigh a certain amount of down fiber, at room temperature, add A certain amount of distilled water infiltration; (2) weighing reaction reagent: the concentration of citric acid is 3-400wt%, and the concentration of dodecyltrimethylammonium chloride is 5-30wt%; (3) then add the reaction reagent to infiltrate In the down, adjust the bath ratio to 1: 80-150; (4) put the above-mentioned reactants in a three-necked flask, rotate and stir in a constant temperature water bath for 0.3-2.5 hours, and set the temperature to 20-100 ° C; (5 ) taking out the modified down and washing it with distilled water for 6-8 times; (6) drying the modified down in an oven at a temperature of 40-100° C. until drying to obtain the modified down.

The technical solution of the present invention to solve the preparation method is to design a modified down, which is characterized in that it is prepared by the above preparation method. Compared with the original down, its heat retention rate is increased by 2-10%, and it is used in the field of heat preservation.

Compared with the prior art, the beneficial effect of the present invention lies in: the preparation method of the modified eiderdown with improved thermal insulation rate used in the design of the present invention has simple process, no damage to the eiderdown, low cost, and the reagents used are environmentally friendly, non-toxic and pollution-free; at the same time Under the condition of not affecting the characteristics of the down itself, the cations are connected to the macromolecules of the down through chemical bonds, so that the down can be washed with water and have permanent thermal performance, which improves the utilization rate of down fibers and reduces the consumption of down.

Detailed ways

The present invention will be described in detail below in conjunction with specific implementation examples.

A kind of modified eiderdown with improved thermal insulation rate designed by the present invention and its preparation method are characterized in that the treatment process of eider down comprises the following procedures: infiltration procedure, reaction procedure, washing procedure, dehydration procedure, drying procedure, concrete steps are as follows: (1) Weigh a certain amount of down fiber, at room temperature, add a certain amount of distilled water to infiltrate; (2) Weigh and reflect reagents: the concentration of citric acid is 3-400wt%, the concentration of dodecyltrimethylammonium chloride 5-30wt%; (3) add the reaction reagents into the infiltrated down, add distilled water to adjust the bath ratio to 1:80-150; (4) put the above-mentioned reactants in a three-necked flask, and rotate and stir in a constant temperature water bath 0.3-2.5 hours, the temperature is set at 20-100°C; (5) Take out the modified down and wash it with distilled water for 6-8 times; (6) Finally, dry the modified down in an oven at a temperature of 40-100°C, The modified down is obtained until it is dried.

The eiderdown described in the present invention adopts the white duck down with a down content of more than 90%, that is, 90% white duck down. Note: the down content is generally a weight ratio. But it does not rule out goose down, cashmere, camel hair and other fluff.

The active agent that the preparation method design of the present invention adopts is dodecyltrimethylammonium chloride, dodecylbenzenesulfonic acid, dodecyltrimethylammonium bromide, alkyl polyoxyethylene ammonium bromide, At least one of sodium lauryl sulfate and dioctadecyl dimethyl ammonium bromide. This treatment agent has no damage to the down and down, and at the same time can make the down and down softer, fluffier and warmer, and at the same time whiteness And cleanliness has also improved.

The cross-linking agent used in the design of the preparation method of the present invention is at least one of citric acid, malic acid, tannic acid, gallic acid, tartaric acid, and adipic acid, which can be respectively combined with the amino group in the feather macromolecule and the described The treatment agent undergoes a chemical reaction, and this reaction can make the treatment agent fixed on the surface of the down and down, which is not easy to fall off, and can fully and stably play the role of keeping warm.

Thermal insulation performance test: 10g of modified down in a 30X30cm square down bag is used to measure the thermal insulation rate on a flat-type thermal insulation instrument, and an equal amount of untreated down is used as a reference group.

The modified eider down of the present invention is characterized in that it is prepared by the above-mentioned preparation method, and compared with the original velvet, its heat retention rate is increased by 2-10%, so that the eider down is more warm, fluffy and soft.

Example 1

Step 1: First weigh a certain amount of down fiber, add a certain amount of distilled water to infiltrate for 1 hour at room temperature, then weigh the reaction reagent: the concentration of citric acid is 3%, the concentration of dodecyltrimethylammonium chloride is 5% %, add the reaction reagent into the infiltrated down, add distilled water to adjust the bath ratio to 1:80;

Step 2: Put the above reactants in a three-necked flask, rotate and stir in a constant temperature water bath for 0.3 hours, set the temperature at 20°C, take out the modified down after the set time, wash it with distilled water for 6-8 times, and finally put The modified down is dried in an oven at a temperature of 50° C. for 3 hours to obtain the modified down.

Insulation performance test: Take 10g of dried modified down, place it under constant temperature and humidity conditions for 24 hours, put it into a 30×30cm down bag, and measure the heat retention rate of the down with a flat-type heat preservation instrument. After testing, the modified down is more effective than the original The thermal insulation rate of cashmere is increased by 2.46%.

Implementation Case 2

Step 1: First weigh a certain amount of down fiber, add a certain amount of distilled water to soak for 1 hour at room temperature, and then weigh the reaction reagent: the concentration of citric acid is 400%, and the concentration of dodecyltrimethylammonium chloride is 30% %, adding the reaction reagent into the infiltrated down, adding distilled water to adjust the bath ratio to 1: 150;

Step 2: Put the above reactants in a three-necked flask, rotate and stir in a constant temperature water bath for 2.5 hours, set the temperature at 100°C, take out the modified down after the set time, wash it with distilled water for 6-8 times, and finally put The modified down is dried in an oven at a temperature of 50° C. for 3 hours to obtain the modified down.

Insulation performance test: Take 10g of dried modified down, place it under constant temperature and humidity conditions for 24 hours, put it into a 30×30cm down bag, and measure the heat retention rate of the down with a flat-type heat preservation instrument. After testing, the modified down is more effective than the original The thermal insulation rate of cashmere is increased by 3.69%.

Implementation Case 3

Step 1: First weigh a certain amount of down fiber, add a certain amount of distilled water to soak for 1 hour at room temperature, and then weigh the reaction reagent: the concentration of citric acid is 50%, and the concentration of dodecyltrimethylammonium chloride is 20%. %, add the reaction reagent into the infiltrated down, add distilled water to adjust the bath ratio to 1:80;

Step 2: Put the above reactants in a three-necked flask, rotate and stir in a constant temperature water bath for 1.5 hours, set the temperature at 70°C, take out the modified down after the set time, wash with distilled water 6-8 times, and finally put The modified down is dried in an oven at a temperature of 50° C. for 3 hours to obtain the modified down.

Insulation performance test: Take 10g of dried modified down, place it under constant temperature and humidity conditions for 24 hours, put it into a 30×30cm down bag, and measure the heat retention rate of the down with a flat-type heat preservation instrument. Compared with the original down under the same conditions Compared with that, the thermal insulation rate of modified down increased by 4.41%.

Implementation Case 4

Step 1: First weigh a certain amount of down fiber, add a certain amount of distilled water to soak for 1 hour at room temperature, and then weigh the reaction reagent: the concentration of citric acid is 100%, and the concentration of dodecyltrimethylammonium chloride is 25%. %, adding the reaction reagent into the infiltrated down, adding distilled water to adjust the bath ratio to 1: 100;

Step 2: Put the above reactants in a three-necked flask, rotate and stir in a constant temperature water bath for 2 hours, set the temperature at 70°C, take out the modified down after the set time, wash with distilled water 6-8 times, and finally put The modified down is dried in an oven at a temperature of 50° C. for 3 hours to obtain the modified down.

Insulation performance test: Take 10g of dried modified down, place it under constant temperature and humidity conditions for 24 hours, put it into a 30×30cm down bag, and measure the heat retention rate of the down with a flat-type heat preservation instrument. Compared with the original down under the same conditions Compared with that, the thermal insulation rate of modified down increased by 6.48%.

Implementation Case 5

Step 1: First weigh a certain amount of down fiber, add a certain amount of distilled water to soak for 1 hour at room temperature, and then weigh the reaction reagent: the concentration of citric acid is 300%, and the concentration of dodecyltrimethylammonium chloride is 15%. %, adding the reaction reagent into the infiltrated down, adding distilled water to adjust the bath ratio to 1: 120;

Step 2: Put the above reactants in a three-necked flask, rotate and stir in a constant temperature water bath for 1 hour, set the temperature at 40°C, take out the modified down after the set time, wash with distilled water 6-8 times, and finally put The modified down is dried in an oven at a temperature of 50° C. for 3 hours to obtain the modified down.

Insulation performance test: Take 10g of dried modified down, place it under constant temperature and humidity conditions for 24 hours, put it into a 30×30cm down bag, and measure the heat retention rate of the down with a flat-type heat preservation instrument. Compared with the original down under the same conditions Compared with that, the thermal insulation rate of modified down has increased by 8.6%.

Implementation Case 6

Step 1: First weigh a certain amount of down fiber, add a certain amount of distilled water to soak for 1 hour at room temperature, then weigh the reaction reagents: the concentration of citric acid is 10%, the concentration of dodecyltrimethylammonium chloride is 15% %, adding the reaction reagent into the infiltrated down, adding distilled water to adjust the bath ratio to 1: 100;

Step 2: Put the above reactants in a three-necked flask, rotate and stir in a constant temperature water bath for 1 hour, set the temperature at 60°C, take out the modified down after the set time, wash with distilled water 6-8 times, and finally put The modified down is dried in an oven at a temperature of 50° C. for 3 hours to obtain the modified down.

Insulation performance test: Take 10g of dried modified down, place it under constant temperature and humidity conditions for 24 hours, put it into a 30×30cm down bag, and measure the heat retention rate of the down with a flat-type heat preservation instrument. Compared with the original down under the same conditions Compared with that, the thermal insulation rate of modified down increased by 9.51%.

Finally, it should be noted that: the above case is only a detailed description of the technical solution, but it cannot exhaust the scope of the patent, and any equivalent replacement of some technical features of the present invention without departing from the principle of the technical solution of the present invention should cover In the scope of the technical solutions claimed in the present invention.

What is not mentioned in the present invention is applicable to the prior art.

Claims (4)

1. a kind of modified eider down and preparation method thereof that improves heat retention rate, it is characterized in that operating steps and prescription are as follows: take a certain amount of eider down fiber, infiltrate 1h at room temperature; Then add reaction reagent, wherein crosslinking agent 3- 400wt%, active agent 5-30wt%; add a certain amount of water, adjust the ratio of down and solution to 1:80-150; react at 20-100°C for 0.3-2.5h; then wash with distilled water 6-8 times , drying at a temperature of 40-100°C to obtain down with better thermal performance. 2. down fiber preparation method according to claim 1 is characterized in that active agent is dodecyltrimethylammonium chloride, dodecylbenzenesulfonic acid, dodecyltrimethylammonium bromide, At least one of alkyl polyoxyethylene ammonium bromide, sodium lauryl sulfate, and dioctadecyl dimethyl ammonium bromide, and the crosslinking agent is citric acid, malic acid, tannic acid, and gallic acid , tartaric acid, adipic acid at least one. 3. a kind of modified eider down and preparation method thereof that improves heat retention rate according to claim 1, is characterized in that described step is: (1) weigh a certain amount of eider down fiber, at room temperature, add a certain amount of Distilled water infiltration; (2) weighing reaction reagent: citric acid concentration is 3-200wt%; Lauryl trimethyl ammonium chloride concentration is 5-30wt%; (3) then add reaction reagent in the eider down that infiltrates , adjust the bath ratio to 1: 80-120; (4) place the above-mentioned reactants in a three-necked flask, rotate and stir in a constant temperature water bath for 0.3-2.5 hours, and set the temperature to 20-100 ° C; (5) change the The down is taken out, washed with distilled water for 6-8 times; (6) the modified down is dried in an oven at a temperature of 40-90° C. to obtain the modified down. 4. The modified down fiber prepared according to claims 1 and 3 is characterized in that its heat retention rate is increased by 2-10% compared with the original cashmere.