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Lignin grafted polyoxyethylene ether, special modifier based on lignin grafted polyoxyethylene ether and used for lignin-based machine blasting mortar, preparation method of lignin grafted polyoxyethylene ether, and applications of special modifier

A technology of polyoxyethylene ether and allyl polyoxyethylene ether, which is applied in the field of ready-mixed mortar modifiers, can solve the problems of complex components of machine-blasting mortar modifiers, inability to directly apply machine-blasting mortars, and production failure. To achieve the effect of broadening the way of resource utilization, significant economic and social value, and easy operation of production

Active Publication Date: 2018-12-18
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the shortcomings and deficiencies in the above-mentioned prior art that ordinary wet-mixed mortar admixtures cannot be directly applied to machine sprayed mortar, existing machine sprayed mortar modifiers have complex components, cannot be produced in the form of water, and have high cost, the primary purpose of the present invention To provide a lignin grafted polyoxyethylene ether

Method used

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  • Lignin grafted polyoxyethylene ether, special modifier based on lignin grafted polyoxyethylene ether and used for lignin-based machine blasting mortar, preparation method of lignin grafted polyoxyethylene ether, and applications of special modifier
  • Lignin grafted polyoxyethylene ether, special modifier based on lignin grafted polyoxyethylene ether and used for lignin-based machine blasting mortar, preparation method of lignin grafted polyoxyethylene ether, and applications of special modifier
  • Lignin grafted polyoxyethylene ether, special modifier based on lignin grafted polyoxyethylene ether and used for lignin-based machine blasting mortar, preparation method of lignin grafted polyoxyethylene ether, and applications of special modifier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] (1) Heat 150g of allyl polyoxyethylene ether with a relative molecular weight of 2400 to 60°C to melt it completely, drop 1g of boron trifluoride-ether solution and 4g of epichlorohydrin, and react for 4 hours to obtain allyl Based polyoxyethylene ether grafted chlorinated isopropanol intermediate.

[0050] (2) Add 100 g poplar alkali lignin solid powder into water to prepare an aqueous solution with a mass fraction of 50%, and adjust the pH value to 13 with NaOH. The allyl polyoxyethylene ether grafted chlorinated isopropanol intermediate prepared in step (1) was heated up to 80°C, and an aqueous alkali lignin solution was added dropwise, and reacted for 4 hours to obtain a lignin grafted polyoxyethylene ether solution. After spray drying, lignin grafted polyoxyethylene ether powder is obtained.

[0051] (3) Add 150g of hydroxypropyl methylcellulose, 30g of starch ether, and 10g of sodium gluconate to the lignin-grafted polyoxyethylene ether powder, and mix well to ob...

Embodiment 2

[0054] (1) Heat 50g of allyl polyoxyethylene ether with a relative molecular weight of 1200 to 50°C to melt it completely, add 0.5g of aluminum trichloride and 1g of epichlorohydrin, and react for 3 hours to obtain allyl polyoxyethylene Vinyl ether grafted chlorinated isopropanol intermediate.

[0055] (2) Add 100 g of wheatgrass lignin solid powder into water to prepare an aqueous solution with a mass fraction of 30%, and adjust the pH value to 11 with NaOH. The allyl polyoxyethylene ether grafted chlorinated isopropanol intermediate prepared in step (1) was heated up to 70°C, and an aqueous alkali lignin solution was added dropwise, and reacted for 3 hours to obtain a lignin grafted polyoxyethylene ether solution. After spray drying, lignin grafted polyoxyethylene ether powder is obtained.

[0056] (3) Add 50 g of carboxymethyl cellulose, 10 g of magnesium aluminum silicate, and 5 g of white granulated sugar into the lignin-grafted polyoxyethylene ether powder, and mix even...

Embodiment 3

[0059] (1) Heat 100 g of allyl polyoxyethylene ether with a relative molecular weight of 3600 to 55 ° C to melt it completely, add 0.75 g of zinc chloride and 3 g of epichlorohydrin, and react for 3.5 hours to obtain allyl polyoxyethylene ether Vinyl ether grafted chlorinated isopropanol intermediate.

[0060] (2) Add 100 g of pine alkali lignin solid powder into water to prepare an aqueous solution with a mass fraction of 40%, and adjust the pH value to 12 with NaOH. The allyl polyoxyethylene ether grafted chlorinated isopropanol intermediate prepared in step (1) was heated up to 75°C, and an aqueous alkali lignin solution was added dropwise, and reacted for 3.5 hours to obtain a lignin grafted polyoxyethylene ether solution. After spray drying, lignin grafted polyoxyethylene ether powder is obtained.

[0061] (3) Add 100g of hydroxyethyl cellulose, 20g of lithium magnesium silicate, and 7.5g of citric acid to the lignin-grafted polyoxyethylene ether powder, and mix evenly t...

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Abstract

The invention belongs to the technical field of pre-mixed mortar modifiers, and discloses lignin grafted polyoxyethylene ether, a special modifier based on the lignin grafted polyoxyethylene ether andused for environmentally-friendly lignin-based machine blasting mortar, a preparation method of the lignin grafted polyoxyethylene ether, and applications of the special modifier in machine blastingmortar. The preparation method of the lignin grafted polyoxyethylene ether comprises: (1) heating allyl polyoxyethylene ether, and carrying out a ring-opening reaction on the heated allyl polyoxyethylene ether and epichlorohydrin under the catalysis of Lewis acid to obtain an intermediate; and (2) adding alkaline lignin solid powder to water to prepare an aqueous solution, adjusting the pH value to 11-13 with an alkaline regulator, heating the intermediate obtained in the step (1), adding the heated intermediate to the aqueous solution, and carrying out a reaction to obtain the product. The invention further provides a special modifier based on the lignin grafted polyoxyethylene ether and used for lignin-based machine blasting mortar. With the special modifier of the present invention, theinitial consistency of the mortar mixture is 95+ / -5 mm, the initial bulk density is more than 1900 kg / m<3>, the water retention rate is more than 92%, the 2 h consistency loss rate is less than 30%,and the coagulation time is 5-6 h.

Description

technical field [0001] The invention belongs to the technical field of ready-mixed mortar modifiers, in particular to a lignin-grafted polyoxyethylene ether and a green and environment-friendly lignin-based modifier for machine-sprayed mortar based on it, and a preparation method thereof and its application in machine-sprayed mortar. Applications. Background technique [0002] With the development of construction technology and the enhancement of social environmental awareness, on June 6, 2007, six departments including the Ministry of Commerce, the Ministry of Public Security, the Ministry of Construction, the Ministry of Communications, the General Administration of Quality Supervision, Inspection and Quarantine, and the State Environmental Protection Notice of on-site mixing work". The development of ready-mixed mortar (including dry-mixed mortar and wet-mixed mortar) has become an inevitable trend of green mortar production. According to the "China Construction News" r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/00C04B24/32
CPCC04B24/32C08G81/00C04B24/38C04B24/04
Inventor 邱学青郑大锋管文康陈宇钟定明郑佳蓉李小康郑涛
Owner SOUTH CHINA UNIV OF TECH
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