U.S. patent application number 10/322767 was filed with the patent office on 2004-06-24 for multifunctional surface treatment for textiles.
This patent application is currently assigned to The Hong Kong Polytechnic University. Invention is credited to Daoud, Walid Abdelhamid, Tao, Xiao Ming, Xin, John Haozhong.
Application Number | 20040117915 10/322767 |
Document ID | / |
Family ID | 32593030 |
Filed Date | 2004-06-24 |
United States Patent
Application |
20040117915 |
Kind Code |
A1 |
Xin, John Haozhong ; et
al. |
June 24, 2004 |
Multifunctional surface treatment for textiles
Abstract
A process for chemically bonding an oxide matrix to a textile
surface, comprises providing a dry textile substrate, coating the
substrate with a nanosol preparation, and curing the coated
substrate.
Inventors: |
Xin, John Haozhong; (Hung
Hom, HK) ; Daoud, Walid Abdelhamid; (Hung Hom,
HK) ; Tao, Xiao Ming; (Hung Hom, HK) |
Correspondence
Address: |
LEYDIG VOIT & MAYER, LTD
700 THIRTEENTH ST. NW
SUITE 300
WASHINGTON
DC
20005-3960
US
|
Assignee: |
The Hong Kong Polytechnic
University
Hung Hom
HK
|
Family ID: |
32593030 |
Appl. No.: |
10/322767 |
Filed: |
December 19, 2002 |
Current U.S.
Class: |
8/115.51 |
Current CPC
Class: |
D06M 11/36 20130101;
D06M 11/46 20130101; D06M 2400/02 20130101; D06M 2200/00 20130101;
D06M 2200/25 20130101 |
Class at
Publication: |
008/115.51 |
International
Class: |
D06M 010/00 |
Claims
1. A process for bonding an oxide matrix directly to a textile
surface, comprising: providing a dry textile substrate, coating the
substrate with a nanosol preparation, and drying/curing the coated
substrate.
2. The process of claim 1 wherein the coated substrate is pressed
and/or padded prior to drying/curing.
3. The process of claim 2 wherein the pressing/padding takes place
at a pressure of about 2.7 kg per square cm.
4. The process of claim 1 wherein the coated substrate is dried at
about 80.degree. C. for about 10 minutes prior to curing.
5. The process of claim 1 wherein curing of the coated substrate is
effected at about 150.degree. C. for about 5 minutes.
6. The process of claim 1 wherein the nanosol preparation is
prepared at room temperature by mixing titanium tetraisopropoxide,
ethanol and acetic acid in a molar ratio of 1:100:0.05
respectively.
7. The process of claim 1 wherein the substrate is dried at about
110.degree. C. for about 10 minutes prior to the coating step.
8. The process of claim 1 wherein the coating step comprises
dip-coating the substrate in the nanosol preparation for about 30
seconds.
Description
BACKGROUND OF THE INVENTION
[0001] The present invention relates to multifunctional
nanostructural surface treatment for textiles. More particularly,
although not exclusively, the invention relates to the surface
treatment of textiles adopting a Sol-gel reaction scheme. The
invention relates to a simple, fast and low-cost finishing process
for textiles using a metal oxide matrix providing improved surface
properties. Properties to be improved might be ultraviolet
filtering, hydrophilicity, self-cleaning, antimicrobial and
deodorising characteristics.
[0002] Applications of the invention exist in the production of
smart textiles with tailor-made end uses addressing environmental
protection and hygienic aspects.
[0003] Present technologies such as impregnation coating of
dispersed nanoparticles suffer from low adhesion between the oxide
coating and the textile surface and hence poor wash-fastness
results. The present invention, on the other hand allows for
chemical bonding between the oxide matrix and the textile surface
leading to excellent wash fastness. Other advantages are in the
simplicity of the process and the low processing temperatures
[0004] The invention may have application to the treatment of
cellulosic webs (such as paper, cotton, rayon and other regenerated
cellulosic and cellulosic-containing materials such as Tencil and
Lyocell, as well as linen, jute, ramie and industrial hemp or the
like), wool which is proteinaceous animal fibre, as well as silk
and regenerated proteins, other animal fibres, man-made or
synthetic fibres that contain hydroxyls, amides, carboxyl and thiol
groups.
OBJECTS OF THE INVENTION
[0005] It is an object of the present invention to provide a simple
process for coating textile surfaces with a continuous metal oxide
without altering the appearance of the textile.
DISCLOSURE OF THE INVENTION
[0006] There is disclosed herein a process for bonding an oxide
matrix directly to a textile surface, comprising:
[0007] providing a dry textile substrate,
[0008] coating the substrate with a nanosol preparation, and
[0009] drying/curing the coated substrate.
[0010] Preferably the coated substrate is pressed and/or padded
prior to drying/curing.
[0011] Preferably the pressing/padding takes place at a pressure of
about 2.7 kg per square cm.
[0012] Preferably the coated substrate is dried at about 80.degree.
C. for about 10 minutes prior to curing.
[0013] Typically curing is effected at about 150.degree. C. for
about 5 minutes.
[0014] Preferably the nanosol preparation is prepared at room
temperature by mixing titanium tetraisopropoxide, ethanol and
acetic acid in a molar ratio of 1:100:0.05 respectively.
[0015] The substrate is typically dried at about 100.degree. C. for
about 5-10 minutes prior to the coating step.
[0016] Preferably the coating step comprises dip-coating the
substrate in the nanosol preparation for about 30 seconds.
[0017] Definition
[0018] As used herein, the term "dry" is intended to mean that the
surface of the textile is free of water to enable the nanosol
preparation to coat and remain coated to the substrate.
DESCRIPTION OF THE PREFERRED EMBODIMENT
[0019] The General Sol-gel Reaction Scheme
[0020] The general reaction,scheme adopted in the present invention
is represented as follows: 1
[0021] Titania Nanosol Preparation
[0022] The nanosol can be prepared at room temperature by mixing
titanium tetraisopropoxide, ethanol and acetic acid in a molar
ratio of 1:100:0.05 respectively.
EXAMPLE 1
[0023] A cotton substrate of 10.times.10 cm was dried at
100.degree. C. for 10 minutes. The dried cotton substrate was then
dip-coated in the prepared sol for 30 seconds, padded at 2,7 kg per
square centimetre and dried at 80.degree. C. for 10 minutes and
then finally cured at 150.degree. C. for five minutes.
* * * * *