Preparation method of hydrophobic lignosulfonate

A technology of lignosulfonate and hydrophobicity, which is applied in the surface treatment of lignosulfonate and the preparation of hydrophobic lignosulfonate, can solve the problems of resource waste, reduce moisture absorption, and achieve stable and reliable reaction , The effect of improving lipophilicity

Inactive Publication Date: 2013-11-20
DALIAN POLYTECHNIC UNIVERSITY
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Lignin is a natural polymer that is second only to cellulose in nature, and the annual output of industrial lignin from pulping and papermaking waste liquid is about 50 million tons, of which less than 10% of lignosulfonate is used It is used in industrial production, but only about 1% of a large amount of lignin is effectively utilized, and most of the rest are burned through alkali recovery devices, resulting in a huge waste of resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A preparation method of hydrophobic calcium lignosulfonate;

[0023] ①Dissolution: Grind calcium lignosulfonate to a particle size of 300-500nm, dry in vacuum at 110°C for 12 hours, weigh 5g of crushed and dried calcium lignosulfonate, mix with 100ml of deionized water, and stir at 160°C for 1h .

[0024] ②Grafting: Add 0.1g of tris(dioctylpyrophosphoryloxy)isopropyl titanate coupling agent to the aqueous solution of calcium lignosulfonate and mix well, react at 170°C for 6h, then let stand for 12h, suction filter, After vacuum drying for 12 hours, disperse in 20ml of acetone, let stand for 12 hours, filter with suction, wash, and vacuum dry at 110°C for 12 hours.

[0025] It was measured that within 12 hours, the moisture absorption rate decreased by 5.95%, and the oil absorption rate increased by 49.52%. After 36 hours, the calcium lignosulfonate had a constant weight.

Embodiment 2

[0027] The difference with embodiment 1 is:

[0028] The titanate coupling agent is diisostearyl ethylene glycol titanate coupling agent, and its mass is 0.15 g.

[0029] It was measured that within 12 hours, the moisture absorption rate decreased by 6.28%, the oil absorption rate increased by 52.39%, and the calcium lignosulfonate had a constant weight after 36 hours.

Embodiment 3

[0031] The difference with embodiment 1 is:

[0032] The titanate coupling agent is bis(dioctyl pyrophosphate) glycolate coupling agent, and its mass is 0.175g.

[0033] It was measured that within 12 hours, the moisture absorption rate decreased by 6.97%, the oil absorption rate increased by 54.03%, and the calcium lignosulfonate had a constant weight after 24 hours.

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PUM

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Abstract

The invention relates to a preparation method of hydrophobic lignosulfonate, and belongs to the field of surface treatment technologies of lignosulfonate. The preparation method comprises the steps of dissolving and grafting, wherein the grafting comprises the steps of uniformly mixing a lignosulfonate aqueous solution and a titanate coupling agent, reacting for 4-6h at 160-170 DEG C, standing, filtering, drying, dispersing in an organic solvent, standing, filtering, washing and drying. The preparation method has the benefits that hydrophobic lignosulfonate is prepared by adopting a chemical grafting method; reaction is stable and reliable; the lipophilicity of grafted lignosulfonate is improved significantly; and the method provides the possibility for further improving the compatibility between lignosulfonate and a high polymer material, and for preparing a high-performance wood-plastic composite.

Description

technical field [0001] The invention relates to a method for preparing hydrophobic lignosulfonate, which belongs to the field of lignosulfonate surface treatment technology. Background technique [0002] Lignin is a natural polymer that is second only to cellulose in nature, and the annual output of industrial lignin from pulping and papermaking waste liquid is about 50 million tons, of which less than 10% of lignosulfonate is used For industrial production, only about 1% of a large amount of lignin is effectively utilized, and most of the rest are burned by alkali recovery devices, resulting in a huge waste of resources. A few days ago, reports surrounding the effective and high-value utilization of lignin-based materials have been increasing year by year. [0003] Composite materials prepared by blending lignin materials and polymer materials can obtain low-cost composite materials with special properties such as heat resistance and ultraviolet radiation resistance under ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08H7/00C08L97/00
Inventor 冯钠王洁王新红于国健
Owner DALIAN POLYTECHNIC UNIVERSITY
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