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Method for preparing polyether polyol by ultrasound-assisted liquefaction of waste water bamboo fibers

A polyether polyol and ultrasonic-assisted technology, which is applied in the field of preparing polyether polyol by liquefaction of wild bamboo waste, can solve the problems of less research and achieve the effects of lower reaction temperature, low raw material cost, and shortened liquefaction time

Active Publication Date: 2019-04-12
TAIZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is still little research in this area

Method used

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  • Method for preparing polyether polyol by ultrasound-assisted liquefaction of waste water bamboo fibers

Examples

Experimental program
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Effect test

Embodiment 1

[0024] First dry the discarded sheath leaves of Zizania at 50°C overnight, use a pulverizer to pulverize to 40 mesh and sieve to obtain Zizania leaf powder, weigh 1-3g of the powder, put it into polyethylene glycol 400 / glycerol (PEG400: glycerol =4:1) in the mixed liquefaction solvent, the liquid-solid ratio is 8:1, add catalyst (concentrated sulfuric acid), the consumption accounts for 1% of the mixed liquefaction solvent volume, utilize the ultrasonic device that total power is 600W, ultrasonic reaction, reaction time 6min. The ultrasonic conditions are set as shown in Table 1. After the ultrasonic is finished, the temperature is controlled at 100-120°C, and the reaction is stirred at 100r / min for 30min, and the residue rate and hydroxyl value are measured.

Embodiment 2

[0026] First dry the discarded sheath leaves of Zizania zizania at 60°C overnight, pulverize them with a pulverizer, and sieve them through a 80-mesh sieve to obtain Zizania zizania leaf powder. Weigh 1-3g of the powder and put it into polyethylene glycol-400 / glycerol (PEG400: Glycerol=6:1) in the mixed liquefaction solvent, the liquid-solid ratio is 12:1, add catalyst (concentrated sulfuric acid), the dosage accounts for 1% of the volume of the mixed liquefaction solvent, utilize the ultrasonic device with total power of 600W, ultrasonic reaction, reaction The time was 6 minutes, and the ultrasonic conditions were set as shown in Table 1. After the ultrasonic was completed, the temperature was controlled at 100-120°C, and the reaction was stirred at 100 r / min for 30 minutes, and the residue rate and hydroxyl value were measured.

Embodiment 3

[0027] Example 3 Ultrasonic conditions are set as in Table 1, and all the other steps and conditions are the same as in Example 1.

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Abstract

The invention discloses a method for preparing polyether polyol by ultrasound-assisted liquefaction of waste water bamboo fibers. The method comprises the following steps: putting water bamboo leaf powder into a mixed liquefaction solvent of polyethylene glycol 400 and glycerol, wherein the liquid-solid ratio is (8-12):1, the volume ratio of the polyethylene glycol 400 to the glycerol is (4-8):1;then adding 1-2% of a catalyst; carrying out an ultrasonic reaction for 5-10 minutes by using an ultrasonic device; controlling the temperature to be 100-120 DEG C after the ultrasonic treatment is completed; and carrying out stirring to carry out a reaction for 20-40 minutes. According to the method disclosed by the invention, the liquefaction time can be greatly reduced, meanwhile, the use amount of a catalyst and the solid residue rate in a reaction liquid are reduced, and the hydroxyl value of the reaction liquid is increased.

Description

Technical field: [0001] The invention relates to a method for preparing polyether polyol by liquefaction of fibers, in particular to a method for preparing polyether polyol by liquefaction of water bamboo waste. Background technique: [0002] Polyurethane materials are polymers formed from polyols and isocyanates under the action of catalysts and additives, in which there are multiple urethane bonds (-NH-COO-). Polyurethane foam is one of the fastest-growing synthetic materials in the past 10 years, with an annual growth rate of about 7.0%. Polyether polyol is one of the main raw materials for the synthesis of polyurethane. In recent years, with the increasing shortage of petroleum resources, the price has skyrocketed. In order to reduce the dependence of traditional polyurethane on petroleum and the pollution to the environment after it is discarded. The development of degradable polyurethane materials is urgent. The research on the preparation of vegetable oil polyols h...

Claims

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Application Information

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IPC IPC(8): C08G65/34C08G18/48
CPCC08G18/48C08G65/34
Inventor 孙小龙付永前朱华跃罗希张莹莹
Owner TAIZHOU UNIV
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