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CN-121992649-A - Preparation method of low-moisture regain cotton fiber, washable anti-plate-bonding flocculus and application

CN121992649ACN 121992649 ACN121992649 ACN 121992649ACN-121992649-A

Abstract

The invention relates to the technical field of modified fibers, in particular to a preparation method of low-moisture regain cotton fibers, which comprises the following steps of dispersing cotton fibers, then placing the cotton fibers into constant-temperature alkali liquor for activation, and washing the cotton fibers to be neutral after the activation; adding nano-level hydrophobic material into cotton fiber to make them undergo the process of full graft reaction, dewatering, drying so as to obtain the invented low moisture regain cotton fiber, mixing the low moisture regain cotton fiber with common cotton fiber in different ratios so as to obtain the invented washable anti-plate-binding flocculus. The nano-scale hydrophobic material can change the surface chemical composition of the fiber, reduce the surface energy of the fiber, reduce the shrinkage capacity of cotton washing, increase the dimensional stability and have the anti-hardening function.

Inventors

  • WANG PEIYU
  • ZENG YUEMIN
  • WANG LINGZHU
  • DOU QIANQIAN

Assignees

  • 青岛上雅家居用品股份有限公司

Dates

Publication Date
20260508
Application Date
20260109

Claims (6)

  1. 1. The preparation method of the low moisture regain cotton fiber is characterized by comprising the following steps: 1) Dispersing cotton fibers, then placing the cotton fibers into alkali liquor with constant temperature, and washing the fibers to be neutral by deionized water after alkali activation for standby; 2) Adding the cotton fiber in the step 1) into a nanoscale hydrophobic material, and introducing a low-surface energy group on the surface of the cotton fiber to enable the cotton fiber to fully graft with the nanoscale hydrophobic material; 3) And (3) dehydrating the cotton fiber obtained in the step (2), and drying after dehydrating to obtain the low-moisture regain cotton fiber.
  2. 2. The method according to claim 1, wherein in the step 1), the alkali liquor is one or a mixture of sodium hydroxide solution, potassium hydroxide solution, sodium carbonate solution or trisodium phosphate solution with the concentration of 0.1-40 g/L, the activation temperature of the alkali liquor is 10-90 ℃, and the activation time is 10-90 min.
  3. 3. The method according to claim 1, wherein in the step 2), the nano-scale hydrophobic material is one or more of an organosilane compound, a paraffin auxiliary agent, an acrylic ester, a fatty acid and a derivative thereof, wherein the organosilane compound is hexadecyltrimethoxysilane, polydimethylsiloxane, n-octyltrimethoxysilane or hexamethyldisiloxane, the paraffin auxiliary agent is a polyethylene wax emulsion, an oxidized paraffin wax emulsion or a Fischer-Tropsch wax emulsion, the acrylic ester is dodecyl methacrylate, octadecyl acrylate or hexadecyl acrylate, and the fatty acid and derivative thereof is stearic acid, palmitic acid, methyl stearate or fatty acid amide.
  4. 4. The method of claim 3, wherein the concentration of the nanoscale hydrophobic material is 0.1% -10%, the grafting reaction time is 1-5 hours, and the grafting reaction temperature is 20-90 ℃.
  5. 5. The washable anti-plate-bonding flocculus is characterized in that the low-moisture regain cotton fibers and common cotton fibers or functional chemical fibers prepared by the method of any one of claims 1-4 are prepared by non-woven fabric flocculus equipment, and the low-moisture regain cotton fibers account for 20-100 wt% in the washable anti-plate-bonding flocculus.
  6. 6. Use of the washable, anti-sheet-punched material of claim 5 in bedding cores, sleeping mats, seat cushions, mattresses and cotton-padded clothes.

Description

Preparation method of low-moisture regain cotton fiber, washable anti-plate-bonding flocculus and application Technical Field The invention relates to the technical field of modified fibers, in particular to a preparation method of a low-moisture regain cotton fiber, a washable anti-plate-bonding flocculus and application. Background The cotton fiber is used as natural cellulose fiber and has good moisture absorption, air permeability, degradability and comfort, so the non-woven cotton fiber wadding prepared from the cotton fiber has great use demands in the field of home textile. The moisture regain of the common non-woven cotton fiber flocculus is 8.5%, the molecular structure has a large amount of hydrophilic hydroxyl groups, after the water meets the water, the hydroxyl groups and water molecules form hydrogen bonds to lock the water molecules in the cotton fibers, so that the fibers irreversibly shrink, the moisture in the fibers is difficult to volatilize, the quick-drying performance of the common non-woven cotton fiber flocculus is poor, a hard and compact block is easy to form in the washing process, the elasticity is lost, the recovery is difficult, the dimensional stability is poor, the washing cannot be realized, mould is easy to grow in a humid environment, yellowing, peculiar smell are generated, and even fiber degradation is caused, and the prepared non-woven cotton fiber flocculus and the application thereof cannot meet the demands of consumers due to the defect of the common cotton fibers. The chemical grafting modification is an effective solution for solving the problems of common cotton fibers and non-woven cotton fiber floccules, and hydrophobic groups are introduced into the fibers to fully graft react with hydroxyl groups in the cotton fibers, so that on one hand, the hydroxyl groups can be blocked and deactivated, so that the hydroxyl groups cannot form hydrogen bonds with water molecules, moisture regain is reduced, and quick drying performance is improved, and on the other hand, the chemical composition of the surfaces of the fibers can be changed, the surface energy of the fibers is reduced, the shrinkage capacity of cotton washing is reduced, the dimensional stability is improved, and the anti-hardening function is realized. The obtained low-moisture regain cotton fiber and washable anti-plate-hardening flocculus have huge application scenes in daily life, can meet different requirements, and have good comfortableness. Disclosure of Invention Aiming at the problems, the invention provides a preparation method of low moisture regain cotton fiber, which comprises the following steps: 1) And dispersing cotton fibers, and then placing the cotton fibers into constant-temperature alkali liquor for activation, wherein the alkali liquor is one or a mixture of sodium hydroxide solution, potassium hydroxide solution, sodium carbonate solution or trisodium phosphate solution with the concentration of 0.1-40 g/L, the activation temperature of the alkali liquor is 10-90 ℃, and the activation time of the alkali liquor is 10-90 min. The alkali treatment can increase the amorphous area of cotton fiber, improve the activity of the fiber, expose more cellulose hydroxyl groups, provide more reaction sites for the nanoscale hydrophobic material, enhance the binding capacity with the nanoscale hydrophobic material, enable the nanoscale hydrophobic material to enter the fiber more easily and promote graft copolymerization, and clean the fiber to be neutral by deionized water after the activation treatment, remove residual sodium hydroxide solution and avoid interfering with subsequent reactions. 2) Adding a nanoscale hydrophobic material into the cotton fiber in the step 1), wherein the nanoscale hydrophobic material is one or a mixture of organosilane compounds, paraffin auxiliary agents, acrylic esters, fatty acids and derivatives thereof. The organic silane compound is hexadecyl trimethoxy silane, polydimethylsiloxane, n-octyl trimethoxy silane and hexamethyldisiloxane, the paraffin auxiliary agent is polyethylene wax emulsion, oxidized paraffin wax emulsion and Fischer-Tropsch wax emulsion, the acrylic ester is lauryl methacrylate, stearyl acrylate and cetyl acrylate, and the fatty acid and the derivative thereof are stearic acid, palmitic acid, methyl stearate and fatty acid amide. The concentration of the nanoscale hydrophobic material is 0.1% -10%, the grafting reaction time is 1-5 h, and the grafting reaction temperature is 20-90 ℃. The cotton fiber and the nanoscale hydrophobic material are subjected to full grafting reaction, the nanoscale hydrophobic material can introduce hydrophobic groups into the fiber, the middle cavity structure of the cotton fiber is opened, the hardening resistance of the cotton fiber is improved, the surface chemical composition of the fiber can be changed by the nanoscale hydrophobic material, the surface energy of the fiber is reduced, and the hydrophobic functio