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Preparation method of cellulose polyether polyol

A technology of polyether polyol and cellulose, applied in the field of modification of polyether polyol, can solve the problems of unseen, insoluble cellulose, etc., to ensure no pulverization, low shrinkage, and high conversion rate. Effect

Active Publication Date: 2021-04-30
SHANDONG INOV NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the extremely poor solubility of cellulose, there is no literature on the direct liquefaction of cellulose for the synthesis of polyether polyols

Method used

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  • Preparation method of cellulose polyether polyol

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Put 25g of cellulose (molecular weight 0.7*10^5) into 500g water solvent system of 8wt% NaOH and 12wt% urea, and dissolve it in a freezing environment of 10±5°C to obtain an aqueous solution of NaOH, urea, and cellulose. Add this solution to a 2.5L polymerization reactor, then add 26g of diethylene glycol, and check the stamping of the polymerization reactor to ensure good sealing. After nitrogen replacement, vacuumize to the minimum vacuum degree of -0.093MPa, and control the temperature at 80± Add propylene oxide dropwise at 5°C until the amount of propylene oxide added is 360g, stop feeding propylene oxide, after the aging is completed, raise the temperature to 100±5°C, vacuumize and bubble nitrogen to remove the Moisture; after dehydration is completed, control the temperature at 108±2°C, continue to drop 220g of propylene oxide, and mature after the dropwise addition to obtain crude polyether; then the crude polyether is neutralized with phosphoric acid until the pH...

Embodiment 2

[0033] Put 20g of cellulose (molecular weight 0.7*10^5) into 500g of water solvent system of 8wt% NaOH and 12wt% urea, and dissolve it in a freezing environment at 5±5°C to obtain an aqueous solution of NaOH, urea, and cellulose. Add this solution to a 2.5L polymerization reactor, then add 26g of diethylene glycol, and check the stamping of the polymerization reactor to ensure good sealing. After nitrogen replacement, vacuumize to the minimum vacuum degree of -0.093MPa, and control the temperature at 80± Add propylene oxide dropwise at 5°C until the amount of propylene oxide added is 360g, stop feeding propylene oxide, after the aging is completed, raise the temperature to 95±5°C, vacuumize and bubble nitrogen to remove the Moisture; after dehydration is completed, control the temperature at 108±2°C, continue to drop 220g of propylene oxide, and mature after the dropwise addition to obtain crude polyether; then the crude polyether is neutralized with phosphoric acid until the p...

Embodiment 3

[0036] Put 15g of cellulose (molecular mass 0.7*10^5) into 500g water solvent system of 8wt% NaOH and 12wt% urea, and dissolve it in a freezing environment at -5±5°C to obtain an aqueous solution of NaOH, urea, and cellulose. Add this solution to a 2.5L polymerization reactor, then add 26g of diethylene glycol, and check the stamping of the polymerization reactor to ensure good sealing. After nitrogen replacement, vacuumize to the minimum vacuum degree of -0.093MPa, and control the temperature at 80± Add propylene oxide dropwise at 5°C until the amount of propylene oxide added is 360g, stop feeding propylene oxide, after the aging is completed, raise the temperature to 95±5°C, vacuumize and bubble nitrogen to remove the Moisture; after dehydration is completed, control the temperature at 108±2°C, continue to drop 520g of propylene oxide, and mature after the dropwise addition to obtain crude polyether; then the crude polyether is neutralized with phosphoric acid until the pH is...

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Abstract

The invention relates to a preparation method of cellulose polyether polyol, and belongs to the technical field of polyether polyol modification. The preparation method of the cellulose polyether polyol comprises the following steps: dissolving cellulose in an aqueous solution of alkali and urea in a low-temperature environment, taking cellulose, urea and liquid small-molecular alcohol as initiators, and carrying out polymerization reaction on the initiators and propylene oxide under the catalytic action of alkali to obtain the cellulose polyether polyol. The method is scientific and reasonable in design, low in cost, safe, environmentally friendly, high in cellulose conversion rate and free of residues, and the application range of cellulose is expanded.

Description

technical field [0001] The invention relates to a preparation method of cellulose polyether polyol, which belongs to the technical field of polyether polyol modification. Background technique [0002] Cellulose is the renewable biomass resource with the largest reserves on the earth. It has a wide range of sources, is biodegradable, and biocompatible. It is expected to become one of the main chemical raw materials in the future and has broad application prospects in the field of materials. As a polymer raw material, cellulose mainly has the following applications: for example, it is used as wood for building materials, cotton and linen fibers are used for textile materials, and for papermaking, etc.; cellulose is subjected to a series of chemical reactions and transformations to obtain cellulose Cellulose derivative materials based on silk or film, used in industrial production or daily necessities. The degradation of cellulose into small molecular organic compounds, such a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/28C08G65/26C08G18/50C08G101/00
CPCC08G65/2609C08G65/2624C08G65/2696C08G18/5042
Inventor 白维坤孙露霞张莉萍周永振郭怀泉
Owner SHANDONG INOV NEW MATERIALS CO LTD
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