CN-122013523-A - Aldehyde-free stiff water-absorbing man-made cotton sand barrier and preparation method thereof

Abstract

The invention discloses an aldehyde-free stiff water-absorbing human cotton sand barrier and a preparation method thereof, wherein the human cotton sand barrier comprises human cotton and acrylic acid-acrylamide resin prepolymer, the acrylic acid-acrylamide resin prepolymer is baked and crosslinked on the rayon to form a three-dimensional network structure, wherein the acrylic acid-acrylamide resin prepolymer is crosslinked with-OH on the rayon material. The water absorption rate of the artificial cotton sand barrier can reach 60 g/g, and the bending length of the sand barrier is 13cm. The processing technology is simple, the cost is low, and the method can be used for mass production.

Inventors

• Chen Wulei
• LIANG JIALE
• DING YUYANG
• WANG HAIFENG

Assignees

• 南通大学

Dates

Publication Date

20260512

Application Date

20260324

Claims (10)

1. 1. The formaldehyde-free stiff water-absorbing man-made cotton sand barrier is characterized by comprising man-made cotton and acrylic acid-acrylamide resin prepolymer, wherein the acrylic acid-acrylamide resin prepolymer is baked and crosslinked on the man-made cotton to form a three-dimensional network structure, and the acrylic acid-acrylamide resin prepolymer is crosslinked with-OH on a man-made cotton material.
2. 2. A method for preparing the formaldehyde-free stiffening water-absorbing human cotton sand barrier is characterized in that, The acrylic acid-acrylamide resin prepolymer, polyethylene glycol and sodium hypophosphite are mixed to prepare a finishing liquid, and the rayon is immersed into the finishing liquid, and the prepolymer and the rayon are compounded by a rolling and baking process to prepare the aldehyde-free stiff rayon sand barrier.
3. 3. The preparation method of the formaldehyde-free stiffening water-absorbing human cotton sand barrier is characterized by comprising the following steps of adding acrylamide into acrylic acid neutralization solution to obtain mixed solution, adding an initiator into the mixed solution, continuously stirring to prepare reaction stock solution, and carrying out water bath reaction to polymerize the reaction stock solution to form the acrylic acid-acrylamide resin prepolymer.
4. 4. The method for preparing the formaldehyde-free stiffening water-absorbing human cotton sand barrier according to claim 3, wherein the neutralization degree of acrylic acid in the acrylic acid neutralization solution is 40-80%.
5. 5. The method for preparing the formaldehyde-free stiff water-absorbing human cotton sand barrier according to claim 2, wherein the concentration of acrylic acid-acrylamide resin prepolymer in the finishing liquid is 300-500 g/L.
6. 6. The method for preparing the formaldehyde-free stiff water-absorbing human cotton sand barrier according to claim 3, wherein in the rolling and baking process, the baking condition is 150-170 ℃ multiplied by 90-180 s.
7. 7. The method for preparing the aldehyde-free stiff water-absorbing human cotton sand barrier according to claim 3, wherein the initiator is ammonium persulfate.
8. 8. The method for preparing the formaldehyde-free stiff water-absorbing human cotton sand barrier according to claim 2, which is characterized by comprising the following steps: (1) Dropwise adding an acrylic acid solution into the NaOH solution under the ice water bath condition to prepare an acrylic acid neutralization solution, wherein the neutralization degree of the acrylic acid neutralization solution is 40-80%; (2) Adding acrylamide into the acrylic acid neutralization solution to obtain a mixed solution; (3) Adding an initiator into the mixed solution in the step (2), continuously stirring to prepare a reaction stock solution, and carrying out water bath reaction to polymerize the reaction stock solution to form an acrylic acid-acrylamide super absorbent resin prepolymer; (5) Adding polyethylene glycol 1000 and sodium hypophosphite into an acrylic acid-acrylamide super absorbent resin prepolymer to prepare finishing liquid; (6) And (3) immersing the man-made cotton into the finishing liquid, and adopting a rolling and baking process to prepare the formaldehyde-free stiff water-absorbing man-made cotton sand barrier under the condition of two padding and two rolling.
9. 9. The method for preparing the formaldehyde-free stiff water-absorbing human cotton sand barrier according to claim 8, wherein in the step (6), the total mass of the acrylic acid-acrylamide super absorbent resin prepolymer, the polyethylene glycol 1000 and the sodium hypophosphite in each liter of finishing liquid is 300-500 g.
10. 10. The method for producing an aldehyde-free stiff absorbent cotton sand barrier according to claim 8, wherein in the step (6), the liquid carrying rate of the cotton is controlled to be 180% under the condition of two soaking and two rolling.

Description

Aldehyde-free stiff water-absorbing man-made cotton sand barrier and preparation method thereof Technical Field The invention relates to the fields of chemistry and material science, in particular to an aldehyde-free stiff water-absorbing man-made cotton sand barrier. Background Land desertification is one of the serious ecological problems in the world today, and with the development of economy and the growth of population, the damage of human beings to the ecological environment is inevitably increased. The desertification of the land caused by the damages can adversely affect the survival of human beings, and the ecological environment can be continuously developed. The sand barrier is an important means for controlling land desertification, mainly plays a role in preventing wind and fixing sand, and reduces the damage of strong wind and sand and stones to vegetation in a further step. The man-made cotton sand barrier has the characteristics of strong air permeability and hygroscopicity, suitability for hot climates, and high price and performance-price ratio, but the traditional stiffening finishing agent such as GQ-800HH is usually an aldehyde-containing stiffening agent, and the long-term use of the agent can cause harm to the environment. Therefore, there is an urgent need for a sand barrier that is environmentally friendly, degradable, and has good water absorption, retention, and stiffness. Disclosure of Invention The invention aims at providing an aldehyde-free stiff water-absorbing man-made cotton sand barrier with three-in-one stiffness, water-absorbing and water-retaining effects, and a preparation method of the aldehyde-free stiff water-absorbing man-made cotton sand barrier. In order to achieve the first purpose, the technical scheme of the formaldehyde-free stiff water-absorbing man-made cotton sand barrier provided by the invention is as follows: The invention provides an aldehyde-free stiff water-absorbing cotton sand barrier which comprises cotton and acrylic acid-acrylamide resin prepolymer, wherein the acrylic acid-acrylamide resin prepolymer is baked and crosslinked on the cotton to form a three-dimensional network structure, and the acrylic acid-acrylamide resin prepolymer is crosslinked with-OH on a cotton material. The chemical structure of the man-made cotton sand barrier obtained after the acrylic acid-acrylamide resin prepolymer is crosslinked with the man-made cotton material is as follows: In order to achieve the second purpose, the technical scheme of the preparation method of the formaldehyde-free stiff water-absorbing man-made cotton sand barrier provided by the invention is as follows: the invention provides a preparation method of an aldehyde-free stiff water-absorbing human cotton sand barrier, which comprises the steps of mixing an acrylic acid-acrylamide resin prepolymer, polyethylene glycol and sodium hypophosphite to prepare a finishing liquid; the man cotton is immersed in the finishing liquid, and the prepolymer and the man cotton are compounded by a rolling and baking process to prepare the aldehyde-free stiff man cotton sand barrier. The preparation method of the acrylic acid-acrylamide resin prepolymer comprises the following steps of adding acrylamide into acrylic acid neutralization solution to obtain mixed solution, adding an initiator into the mixed solution, continuously stirring to prepare a reaction stock solution, and carrying out water bath reaction to polymerize the reaction stock solution to form the acrylic acid-acrylamide resin prepolymer. Wherein, in the acrylic acid neutralization solution, the neutralization degree of the acrylic acid is 40-80%. Wherein the concentration of the acrylic acid-acrylamide resin prepolymer in the finishing liquid is 300-500 g/L. In the rolling and baking process, the baking condition is 150-170 ℃ multiplied by 90-180 s. Wherein the initiator is ammonium persulfate. Preferably, the invention provides a preparation method of an aldehyde-free stiff water-absorbing human cotton sand barrier, which comprises the following steps: (1) Dropwise adding an acrylic acid solution into the NaOH solution under the ice water bath condition to prepare an acrylic acid neutralization solution, wherein the neutralization degree of the acrylic acid neutralization solution is 40-80%; (2) Adding acrylamide into the acrylic acid neutralization solution to obtain a mixed solution; (3) Adding an initiator into the mixed solution in the step (2), continuously stirring to prepare a reaction stock solution, and carrying out water bath reaction to polymerize the reaction stock solution to form an acrylic acid-acrylamide super absorbent resin prepolymer; (5) Adding polyethylene glycol 1000 and sodium hypophosphite into an acrylic acid-acrylamide super absorbent resin prepolymer to prepare finishing liquid; (6) And (3) immersing the man-made cotton into the finishing liquid, and adopting a rolling and baking process to prepare the formaldehyde-free