Ionic liquid solution of palmitate modified starch size and its application

Abstract

The invention discloses an ionic liquid solution of a palmitate modified starch sizing agent and application thereof and relates to the technical field of spinning sizing agent production. Starch is dissolved in [Amim]Cl ionic liquid, and a starch ionic liquid solution with the starch mass percent being 8-12 is prepared; paratoluensulfonyl chloride and palmitic acid are dissolved in the starch ionic liquid solution, a constant-temperature reaction is conducted until the reaction is finished, and after cooling, the ionic liquid solution of the palmitate modified starch sizing agent is obtained. The prepared ionic liquid solution of the palmitate modified starch sizing agent is used for spinning yarn sizing, the hairiness of cvc yarns is reduced by about 30-70 percent, the breaking force is improved by about 10-30 percent compared with that of a yarn which is not sized, and the elongation at break is reduced about 5-30 percent.

Description

technical field [0001] The invention relates to the technical field of textile size production, in particular to a technology for synthesizing palmitate modified starch size in ionic liquid and directly using it for textile yarn sizing. Background technique [0002] Starch has a wide range of sources and low price, and has always been the main material for warp sizing in the textile industry. However, starch molecules contain a large number of hydroxyl groups, which are too hydrophilic and have strong intermolecular hydrogen bonds. After gelatinization, the viscosity is large, the fluidity is poor, the serous film is hard and brittle, and the adhesion to synthetic fibers is poor. Therefore, the original starch in polyester-cotton yarn The sizing cannot meet the requirements of the weaving process. At present, the method of mixing PVA sizing and modified starch with PVA sizing is mostly used to sizing polyester-cotton yarns. However, the damage and pollution caused by PVA si...

AI Technical Summary

Problems solved by technology

Although their performance has been improved to a certain extent, they still cannot meet the actual needs, and there are many problems in their synthesis.

For example, conventional acrylic grafted starch tends to produce a large number of homopolymers during synthesis, the grafting efficiency is not high, and such monomers themselves are not biodegradable

In addition, in the existing starch modification methods, starch often needs to be gelatinized in advance, which leads to the fact that the solid content in the reactor should not be too large, otherwise the viscosity will be high and the reaction will be difficult

Finally, most grafting reactions require the addition of an initiator, which often leads to a series of problems such as difficult control of the reaction rate and difficult removal of the initiator.