A biodegradable solid particle emulsifier and paper-making sizing agent

A solid particle, emulsifier technology, applied in the directions of dissolution, water repellent addition, chemical instruments and methods, etc., can solve the problems of large amount of particulate components, low ASA emulsion concentration, unfavorable emulsion storage, etc., and achieve high stability. , The effect of low emulsification cost and low dosage

Active Publication Date: 2017-04-12
山东熙来淀粉有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adverse effects brought by the surfactant cannot be completely avoided, and the addition of the particle component is too large, the concentration of the prepared ASA emulsion is very low, which is not conducive to the storage of the emulsion, and the hydrolysis of ASA is serious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of biodegradable solid particle emulsifiers (CPs): hydrolyze microcrystalline cellulose with 64% sulfuric acid solution at 45°C and 100 rpm magnetic stirring for 30 minutes, then centrifuge and wash to remove the remaining acid solution , and then through dialysis and ultrasonic treatment to obtain cellulose nanocrystal columnar particles. The cellulose nanocrystals with a length of 10-500nm and a width of 1-50nm are prepared with deionized water to form a cellulose nanocrystal solution with a mass fraction of 2%.

[0031]Dissolving polylactic acid-glycolic acid copolymer with a molecular weight of 92000-110000g / mol and an intrinsic viscosity of 0.9-1.3dL / g in chloroform to prepare a polylactic acid-glycolic acid copolymer-chloroform solution with a mass fraction of 5%; The polylactic acid-glycolic acid copolymer-chloroform solution was magnetically stirred for 2 hours, then mixed with water at a volume ratio of 1:1, and sheared and stirred for 15 minutes to...

Embodiment 2

[0035] The cellulose nanocrystals with a length of 10-500nm and a width of 1-50nm are prepared with deionized water to form a cellulose nanocrystal solution with a mass fraction of 2%.

[0036] The molecular weight is 92000-110000g / mol, the polylactic acid-glycolic acid copolymer that intrinsic viscosity is 0.9-1.3dL / g is dissolved in chloroform, is made into the polylactic acid-glycolic acid copolymer-chloroform solution that mass fraction is 3%, After magnetically stirring for 2 hours, mix with water at a volume ratio of 5:2, and shear and stir for 15 minutes to obtain a mixed liquid of polylactic acid-glycolic acid copolymer-chloroform-water, and to the obtained polylactic acid-glycolic acid copolymer- The chloroform-water mixed liquid is added with a mass fraction of 2% cellulose nanocrystal aqueous solution, wherein the volume ratio of the polylactic acid-glycolic acid copolymer-chloroform-water mixed liquid to the cellulose nanocrystal aqueous solution is 7:20, ultrasonic...

Embodiment 3

[0040] The cellulose nanocrystals with a length of 10-500nm and a width of 1-50nm are prepared with deionized water to form a cellulose nanocrystal solution with a mass fraction of 2%.

[0041] The molecular weight is 92000-110000g / mol, the polylactic acid-glycolic acid copolymer that intrinsic viscosity is 0.9-1.3dL / g is dissolved in chloroform, is made into the polylactic acid-glycolic acid copolymer-chloroform solution that mass fraction is 7%, After magnetic stirring for 2 hours, mix with water at a volume ratio of 5:1, and shear and stir for 15 minutes to obtain a mixed liquid of polylactic acid-glycolic acid copolymer-chloroform-water, and to the obtained polylactic acid-glycolic acid copolymer- The chloroform-water mixed liquid is added with a mass fraction of 2% cellulose nanocrystal aqueous solution, wherein the volume ratio of the polylactic acid-glycolic acid copolymer-chloroform-water mixed liquid to the cellulose nanocrystal aqueous solution is 7:20, ultrasonic vib...

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Abstract

The invention relates to a biodegradable solid particle emulsifier and a papermaking sizing agent, belonging to the technical field of papermaking sizing agents and related industrial emulsification. The biodegradable solid particle emulsifier (hereinafter referred to as "CPs") of the present invention is prepared from cellulose nanocrystals and poly(lactic-co-glycolic acid) copolymer. The ASA emulsion prepared by using the "CPs" of the present invention is a Pickering emulsion, the droplet size is about 3.4 μm; it has high stability, and the emulsion will not produce particle aggregation, precipitation or precipitation of the water phase after being placed for 24 hours; the emulsion Good internal sizing performance of papermaking pulp can still be maintained after being placed for 3 hours; the preparation process is simple, the amount of emulsifier used is small, the cost of emulsification is low, the method is biodegradable, and has low environmental pollution.

Description

technical field [0001] The invention relates to a biodegradable solid particle emulsifier and a papermaking sizing agent, belonging to the technical field of papermaking sizing agents and related industrial emulsification. Background technique [0002] Water-insoluble papermaking sizing agents need to be emulsified into oil-in-water emulsions to be compatible with papermaking systems that use water as the medium. In recent years, ASA sizing agent has been widely used in high-grade paper and cardboard internal sizing due to its high reactivity, low sizing material cost and fast aging rate, especially for large high-speed paper machines with in-machine coating. . However, ASA is a highly reactive paper-making neutral sizing agent, and its hydrolysis speed is very fast. After its emulsion is stored at room temperature for more than 1 hour, the sizing effect will decrease, and the hydrolyzate will cause obstacles to papermaking and reduce sizing efficiency. Therefore, when usi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01F17/52B01F17/00D21H21/16C09K23/52C09K23/00
Inventor 于得海刘温霞王慧丽李国栋宋兆萍
Owner 山东熙来淀粉有限公司
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