A kind of preparation method of degradable corn cob biomass water retaining agent

A technology of corncob and water-retaining agent, which is applied in the field of biomass materials, can solve the problems of limited water-absorbing capacity, limited water-retaining time, and high cost of water-retaining agents, and achieve the effects of inhibiting water evaporation, increasing adsorption rate, and improving adsorption performance

Active Publication Date: 2019-03-19
甘肃有色冶金职业技术学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, corncobs are usually crushed and dried directly, gelatinized directly, and cross-linking agents, initiators, etc. are added to prepare degradable biomass water-retaining agents. The water-retaining agents prepared by this method have limited water absorption capacity and limited water retention time. When used in regions, the consumption is large and the cost is high

Method used

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  • A kind of preparation method of degradable corn cob biomass water retaining agent
  • A kind of preparation method of degradable corn cob biomass water retaining agent
  • A kind of preparation method of degradable corn cob biomass water retaining agent

Examples

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Effect test

Embodiment 1

[0030] A preparation method of a degradable corncob biomass water-retaining agent, the specific preparation process is as follows: First, use a pulverizer to crush the dried corncob to 200 mesh, weigh 1000g and modify it with microwave radiation at 100w for 10min, and after microwave radiation The corncobs were put into 2L 0.5mol / L acetic anhydride solution, reacted at 60°C for 4h, then rinsed with water for 2-3 times, dried and set aside.

[0031] Weigh 10g of the secondary modified corncob powder and disperse it in 150ml of water, gelatinize at 50°C for 0.5h; then add 80g of acrylamide to the system, stir evenly, and add 0.12g of N,N- Methylbisacrylamide, 0.8g ammonium persulfate-sodium bisulfite until gel is formed, finally washed with 95% ethanol, and dried to obtain a degradable corncob biomass water retaining agent.

Embodiment 2

[0033] A preparation method of a degradable corncob biomass water-retaining agent, the specific preparation process is as follows: First, use a pulverizer to crush the dried corncob to 100 mesh, weigh 1000g and modify it with microwave radiation at 200w for 5min, and after microwave radiation The corncobs were put into 4L 1mol / L formic anhydride solution, reacted at 30°C for 10h, then rinsed with water for 2-3 times, dried and set aside.

[0034] Weigh 10g of secondary modified corn cob powder and disperse in 200ml of water, gelatinize at 80°C for 1h; then add 50g of acrylamide to the system, stir evenly, and add 0.4g of N,N-dimethyl base formamide, 0.5g ammonium persulfate until the gel is formed, finally washed with 50% ethanol, and dried to obtain the degradable corncob biomass water retaining agent.

Embodiment 3

[0036] A preparation method of a degradable corncob biomass water-retaining agent, the specific preparation process is as follows: First, use a pulverizer to crush the dried corncob to 500 mesh, weigh 1000g and modify it by microwave radiation at 100w for 20min, and after microwave radiation The corn cobs were put into 2L 0.8mol / L phthalic anhydride solution, reacted at 80°C for 6h, then rinsed with water for 2-3 times, dried and set aside.

[0037] Weigh 10g of secondary modified corncob powder and disperse in 100ml of water, gelatinize at 65°C for 0.8h; then add 100g of acrylamide to the system, stir evenly, and under nitrogen protection, add 0.1g of glycerol, 0.6 g potassium persulfate, finally washed with 50% ethanol, and dried to obtain degradable corncob biomass water retaining agent.

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Abstract

The invention discloses a preparation method of a biodegradable corncob biomass water-retaining agent. The water-retaining agent is prepared by taking modified corncob and acrylamide as main raw materials, adding a crosslinking agent and an initiator, and performing crosslinking and polymerization through reaction. The preparation method has the advantages that the waste corncob is adopted as a raw material, so that production cost of the water-retaining agent is greatly reduced; a special structural characteristic that a plurality of fine pores are in the surface and the inside of the modified corncob is fully used, and the prepared degradable water-retaining agent has quite good water absorption performance and degradation performance.

Description

technical field [0001] The invention belongs to the technical field of biomass materials, and relates to a water-retaining agent, in particular to a preparation method of a degradable corn cob biomass water-retaining agent. Background technique [0002] my country is a large agricultural country with rich plant fiber resources. Corn cob is the cob of corn after the kernel is removed, which generally accounts for about 20-30% of the ear of corn. China's corn production in 2015 / 16 is expected to be 225 million tons, which can produce 40 million tons of corn cobs by-product. Tens of millions of tons of corn cobs are burned every year, which wastes resources and pollutes the environment. The deep processing of corn cob can not only improve the utilization value of corn by-products, but also has high social and economic benefits and broad development prospects. Corncobs are rich in cellulose (32%-36%), hemicellulose (35%-40%) and lignin (17%-20%). Corncob powder itself has a spo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F251/00C08F251/02C08F220/56C08B15/06C08B15/10C08B3/06C08B3/04C08B3/12C08B37/14C08B37/00C08J3/28C08J9/28
CPCC08B3/04C08B3/06C08B3/12C08B15/06C08B15/10C08B37/00C08B37/14C08F251/00C08F251/02C08J3/28C08J9/28C08J2201/0504C08J2301/02C08F220/56
Inventor 陈卫东陈艳丽蒲济林刘瑜张宝平
Owner 甘肃有色冶金职业技术学院
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