Carbene co-grafting modified fabric, preparation and application thereof

Patent metadata

Field	Value
Publication number	US-12473688-B2
Application number	US-202218035743-A
Country	US
Kind code	B2
Filing date	Jul 12, 2022
Priority date	Feb 15, 2022
Publication date	Nov 18, 2025
Grant date	Nov 18, 2025

Abstract

A carbene co-grafted modified fabric, a preparation method therefor, and an application thereof. Diazotized cotton fabric is sequentially subjected to a reaction with tert-butyl diazoacetate and octyl diazoacetate to obtain the carbene co-grafted modified fabric; or diazotized cotton fabric is sequentially subjected to a reaction with phenyl diazoacetate and octyl diazoacetate to obtain the carbene co-grafted modified fabric. Taking phenyl diazoacetate and tert-butyl diazoacetate as monomers, co-grafting into a cotton fabric is respectively performed with octyl diazoacetate carbene, a surface structure having low surface energy and good roughened morphology is constructed on a fiber surface, and excellent water repellency is consequently provided.

First claim

The invention claimed is:

1 . A carbene grafted modified fabric, wherein the carbene grafted modified fabric is obtained by sequentially reacting a diazotized cotton fabric first with one selected from the group consisting of tert-butyl diazoacetate and phenyl diazoacetate and then with octyl diazoacetate; and
wherein a fluorine-containing reagent is not used to prepare the carbene grafted modified fabric.

2 . The carbene grafted modified fabric according to claim 1 , wherein a cotton fabric is sequentially soaked in alkaline solution and acid solution to obtain a pre-treated cotton fabric; then, the pre-treated cotton fabric is reacted with bromoacetyl bromide to obtain a treated cotton fabric; the treated cotton fabric is reacted with 1,2-bis (p-Toluenesulfonyl) hydrazine to obtain the diazotized cotton fabric.

3 . The carbene grafted modified fabric according to claim 1 , wherein the molar ratio of tert-butyl diazoacetate to octyl diazoacetate is (4-40):1; a molar ratio of phenyl diazoacetate to octyl diazoacetate is (2-30):1.

4 . The carbene grafted modified fabric according to claim 3 , wherein the molar ratio of tert-butyl diazoacetate to octyl diazoacetate is (9-30):1; the molar ratio of phenyl diazoacetate to octyl diazoacetate is (5-25):1.

5 . The carbene grafted modified fabric according to claim 1 , wherein the diazotized cotton fabric is first reacted with tert-butyl diazoacetate at 0° C., 10° C., and 20° C. for 1 hour respectively, and then the octyl diazoacetate is added for reaction for 20-30 hours at 30° C.; alternatively, the diazotized cotton fabric is reacted with phenyl diazoacetate at 0° C., 10° C., and 20° C. for 1 hour, respectively, and then the octyl diazoacetate is added for reaction for 20-30 hours at 30° C.

Assignees

• Univ Soochow

Inventors

• Li Zhanxiong
• Lv Cun

Classifications

• D06M2200/12

  Hydrophobic properties · CPC title

• D06M2101/06

  cellulosic · CPC title

• D06M13/133 Primary

  Halogenated aldehydes; Halogenated ketones {; Halogenated ketenes} · CPC title

• D06M2200/05

  Lotus effect · CPC title

• D06M13/372 Primary

  containing etherified or esterified hydroxy groups {; Polyethers of low molecular weight} · CPC title