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Preparation method of ultrafine particles of cation guar gum

A technology of cationic guar gum and ultrafine particles, which is applied in the field of preparation of guar gum ultrafine particles, can solve problems such as difficulty in filtering water, and achieves the effects of simple process, mild reaction conditions and uniform size

Inactive Publication Date: 2010-02-24
MUDANJIANG HENGFENG PAPER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, guar collagen powder always has unsatisfactory aspects in the process of use, it will cause difficulty in water filtration, etc. Therefore, people often use chemical means to change its physical and chemical properties to meet the needs of actual industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 2.0g cationic guar gum was dissolved in 2000ml water to obtain cationic guar gum solution; the aqueous solution of sodium carboxymethyl starch of 30ml (30mg / ml) was slowly added dropwise in the above-mentioned cationic guar gum solution, and continued to stir for 10min to prepare Cationic guar gum superfine particles. The particle size was determined by dynamic light scattering to be 128nm, and the dispersion index was 0.11. Electrozeta potential analysis instrument measured its surface potential as 14.2±2.1mV. The particles observed by the transmission electron microscope are regular spherical.

Embodiment 2

[0023] 2.0g of cationic guar gum was dissolved in 2000ml of water to obtain a cationic guar gum solution, and 30ml (16mg / ml) of sodium tripolyphosphate aqueous solution was slowly added dropwise to the above-mentioned cationic guar gum solution, and continued to stir for 30min to obtain Cationic guar gum ultrafine particles. The particle diameter measured by dynamic light scattering is 168nm, and the dispersion index is 0.18. The surface potential measured by the zeta potential analysis instrument was 17.2±1.1mV. The particles observed by the transmission electron microscope are regular spherical.

Embodiment 3

[0025] 2.0g of cationic guar gum was dissolved in 1000ml of water to obtain a cationic guar gum solution, and 30ml (10mg / ml) of polysodium malate aqueous solution was slowly added dropwise to the above-mentioned cationic guar gum solution, and continued to stir for 30min to obtain Cationic guar gum ultrafine particles. The particle diameter measured by dynamic light scattering is 227nm, and the dispersion index is 0.22. The surface potential measured by the zeta potential analysis instrument is 10.2±1.8mV. The particles observed by the transmission electron microscope are regular spherical.

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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...

Claims

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Application Information

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IPC IPC(8): D21H21/10D21H21/18D21H21/14D21H17/32
Inventor 潘泉利查瑞涛王世刚宋文杰
Owner MUDANJIANG HENGFENG PAPER CO LTD
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