Preparation method of ultrafine particles of cation guar gum

Abstract

The invention belongs to the field of paper making chemicals, in particular relates to a preparation method of ultrafine particles of guar gum, which uses cation guar gum and polyanion to prepare ultrafine particles through a gelation reaction. The preparation method comprises the following steps: (1) dissolving 100 parts by weight of cation guar gum in water to prepare into a solution with the concentration of 0.5-20mg / ml, and dissolving 0.1-60 parts by weight of polyanion in the water to prepare into a solution with the concentration of 1-60mg / ml; and (2) dropwise adding the water solution of the polyanion into the water solution of the cation guar gum slowly and stirring for 5-60min to obtain ultrafine particles which are uniformly dispersed, wherein the polyanion comprises one or several kinds of trimeric sodium phosphate, poly-sodium malate, sodium carboxymethyl cellulose and sodium carboxymethyl starch. The preparation method has simple processes and moderate reaction conditions;the prepared ultrafine particles of cation guar gum are in a regular round spherical shape and have uniform size, high stability and good repeatability; and the surface charge of each particle is a positive value.

Description

technical field

[0001] The invention belongs to the field of papermaking chemicals, in particular to a preparation method of guar gum ultrafine particles. Background technique

[0002] Guar gum is a plant gum extracted from the leguminous plant - guar beans grown in the Indian subcontinent. It is chemically polygalactose-mannose. Due to its unique molecular structure and physical and chemical properties, it has become a new type of environmental protection additive with great potential. The primary feature of guar gum is that it grows in a high temperature and arid environment, so it is not resistant to water, and can be hydrated and dissolved in cold water, which is a great advantage compared with the use of starch series additives that require gelatinization . Another characteristic of guar gum is that its molecular structure is very similar to that of cellulose. The mannose units in the guar gum molecule are connected to the main chain by 1,4-β glycoside bonds, and the...