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Preparation method of microcapsule soil conditioner with temperature and pH dual intelligent response

A soil conditioner and microcapsule technology, used in microcapsule preparations, microsphere preparation, soil conditioning materials, etc., can solve the problem of poor pH sensitivity of chitosan, inability to adjust acid-base soil at the same time, and no temperature response, etc. problem, to achieve the effect of high drug coating rate, good biodegradability and low price

Active Publication Date: 2019-11-15
黑龙江有方作物保护有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention mainly solves the problem of soil salinity, but separately prepares conditioners for acidic and alkaline soils. The same microcapsule cannot adjust acid-alkali soil at the same time, and has no temperature response
Chinese patent CN 107652977 A discloses a preparation method of a soil conditioner. The core-shell microcapsule soil conditioner is prepared by oil phase separation method, but the method only interacts with chitosan by adding N-isopropylacrylamide. function, one molecule of N-isopropylacrylamide consumes one amino group, the binding efficiency is low, and the pH sensitivity of chitosan is not good

Method used

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  • Preparation method of microcapsule soil conditioner with temperature and pH dual intelligent response
  • Preparation method of microcapsule soil conditioner with temperature and pH dual intelligent response
  • Preparation method of microcapsule soil conditioner with temperature and pH dual intelligent response

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Dissolve 10g of chitosan in 200mL of 0.1mol / L HCl solution, then add it into 200mL of β-cyclodextrin aqueous solution containing 8g, stir for 1 hour; then gradually add 25% glutaraldehyde, 12mL, within 30min, 70 Stir at ℃ for 6 hours; then add 70 mL of 1 mol / L NaOH aqueous solution to precipitate the product; finally wash with acetone and water, and dry in vacuum to obtain CS-g-CD.

[0033] According to -NH 2 : MAA: NIPAM molar ratio is 1:4:4, CS-g-CD and MAA, NIPAM prepared above are added 50mL deionized water with 10g, 0.069g, 0.0905g respectively; Ultrasonic 20min, N 2 Protect and stir for 30min, heat to 80°C; then add initiator ammonium persulfate APS 0.0003g, N 2 Protected and stirred for 2 hours; then the temperature was lowered from 80°C to 50°C, 0.1mL glutaraldehyde was added, and reacted for 2 hours; finally, it was washed repeatedly with acetone and deionized water, and the modified CS-g-CD was obtained by vacuum drying .

[0034] Dissolve the modified CS-g...

Embodiment 2

[0038] Dissolve 20g of chitosan in 200mL of 0.1mol / L HCl solution, then add it into 200mL of β-cyclodextrin aqueous solution containing 16g, stir for 1 hour; then gradually add 25% glutaraldehyde, 24mL, within 30min, 70 Stir at ℃ for 6 hours; then add 70 mL of 1 mol / L NaOH aqueous solution to precipitate the product; finally wash with acetone and water, and dry in vacuum to obtain CS-g-CD.

[0039] According to -NH 2 : MAA: NIPAM molar ratio is 1:4:4, the prepared CS-g-CD and MAA, NIPAM were added 50mL deionized water at 20g, 0.138g, 0.181g; ultrasonic 20min, N 2 Protect and stir for 30min, heat to 80°C; then add initiator ammonium persulfate APS 0.0006g, N 2 Protected and stirred for 2 hours; then the temperature was lowered from 80°C to 50°C, 0.2mL glutaraldehyde was added, and reacted for 2 hours; finally, it was washed repeatedly with acetone and deionized water, and the modified CS-g-CD was vacuum-dried .

[0040] Dissolve 20g of the modified CS-g-CD in 100mL of 0.1mol...

Embodiment 3

[0044] Dissolve 30g of chitosan in 200mL of 0.1mol / L HCl solution, then add it into 200mL of β-cyclodextrin aqueous solution containing 24g, stir for 1 hour; then gradually add 25% glutaraldehyde, 36mL, within 30min, 70 Stir at ℃ for 6 hours; then add 70 mL of 1 mol / L NaOH aqueous solution to precipitate the product; finally wash with acetone and water, and dry in vacuum to obtain CS-g-CD.

[0045] According to -NH 2 : MAA: NIPAM molar ratio is 1:4:4, the prepared CS-g-CD and MAA, NIPAM were added 50mL deionized water at 30g, 0.207g, 0.2715g; ultrasonic 20min, N 2 Protect and stir for 30min, heat to 80°C; then add initiator ammonium persulfate APS 0.0009g, N 2 Protected and stirred for 2 hours; then the temperature was lowered from 80°C to 50°C, 0.3mL glutaraldehyde was added, and reacted for 2 hours; finally, it was washed repeatedly with acetone and deionized water, and the modified CS-g-CD was vacuum-dried .

[0046] Dissolve the modified CS-g-CD30g in 100mL of 0.1mol / L ...

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Abstract

The invention relates to a preparation method of a microcapsule soil conditioner with temperature and pH dual intelligent response. The method includes: adopting chitosan grafted beta-cyclodextrin asthe wall material of the microcapsule, grafting N-isopropyl acrylamide and methacrylic acid to the wall material, coating fulvic acid with wood tar to serve as a simulated soil conditioner, and utilizing inverse emulsion method and piercing method to synthesize the grafted wall material and the soil conditioner into the microcapsule soil conditioner. Compared with the prior art, the microcapsule obtained by the method provided by the invention can intelligently induce temperature and pH so as to slowly release the soil conditioner, and has good slow-release effect, thus being suitable for thecrop growth cycle.

Description

technical field [0001] The invention relates to a soil conditioner, in particular to a preparation method of a microcapsule soil conditioner with temperature and pH dual intelligent responses. Background technique [0002] Soil is the most basic means of production for human beings and the material basis for human survival. In our country, land resources are not only very limited, but also a considerable proportion of soils have obstacle factors due to soil-forming factors or human factors, including erosion, poor texture, poor structure or arability, salinity, acidification, toxic substance pollution, There are many problems in the soil such as poor soil layer that hinders the growth of plant roots, excessive or insufficient soil moisture, low fertility or imbalance of nutrients. [0003] Under normal circumstances, these obstructive damaged soils are difficult to use, but in recent years, people have used corresponding soil conditioners to improve different soil problems,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/14B01J13/14C09K109/00
CPCB01J13/14C09K17/14C09K2109/00
Inventor 杨帆王锦成宋仕强饶品华陈思浩王润锴
Owner 黑龙江有方作物保护有限公司
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