Grafting Method By Means of Ionising Radiation Using a Reactive Surfactant Molecule, Textile Substrate and Battery Separator Obtained by Means of Grafting

Abstract

A method for grafting functional chemical groups to a textile substrate is provided, wherein the substrate is impregnated with a solution of a functional molecule, containing the functional chemical group and a group that is reactive to ionising radiation, as well as a surfactant molecule that can improve the wettability of the textile substrate by the solution. The surfactant molecule contains at least two types of groups that are reactive to ionising radiation. Subsequently, ionising radiation is applied to the impregnated textile substrate and the reaction of the reactive groups bridge-grafts the functional molecules to the surfactant molecules. A textile substrate and a battery separator grafted using the above method are also described.

Description

BACKGROUNDField of the Invention[0001]The invention relates to a method for grafting functional chemical groups on a textile substrate, and a textile substrate and battery separator grafted using such a method.[0002]The invention particularly applies to the grafting of textile substrates so as to give them an ion exchange function. In particular, the invention proposes a method for grafting a bipolar textile substrate, i.e. comprising a different ion exchange function on each of the faces thereof.[0003]The grafted textile substrates according to the invention are particularly useful in the agri-food, pharmaceutical, medical, energy, biological and environmental sectors. For example, the use of ion exchange textile substrates according to the invention makes it possible to:[0004]increase the conductivity of solutions in order to improve electrodialysis separation methods and electrochemical methods;[0005]water softening with optionally a bacteriostatic property;[0006]the manufacture ...

AI Technical Summary

Benefits of technology

[0015]The aim of the invention is to remedy the problems of the prior art by proposing a method for grafting functional chemical groups on a textile substrate which is particularly simple and modular in the implementation thereof, said method also making it possible to obtain quality bipolar textile substrates.

Problems solved by technology

In particular, these methods involve the drawback of having to be performed in organic solution and requiring heating.

In addition, these methods do not enable grafting of a large range of functional chemical groups, at least simply and in a modular fashion according to the type of textile substrate.

Furthermore, after grafting, the implementation of known methods involves the problem of the removal of the solvent and non-grafted chemical substance which are contained in the textile substrate, and the problem of the subsequent recycling thereof.

Finally, the production of bipolar textile substrate with the methods according to the prior art does not give satisfaction, particularly with respect to the presence of each of the ion exchange functions on a single face.