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A trigger-controlled release plant antifreeze agent and preparation method thereof

An antifreeze and surfactant technology, which is applied in the field of trigger-controlled release plant antifreeze and its preparation, can solve the problems of limited mitigation effect of crop chilling stress, easy photolysis, easy inactivation, etc., so as to improve crop resistance. Freezing performance, the effect of increasing water solubility

Active Publication Date: 2021-08-24
BEIJING BOYICHENG SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, chemical regulatory agents, especially hormones and biological enzymes, have disadvantages such as easy photolysis, easy inactivation, and poor compatibility with other fertilizers and pharmaceuticals. Moreover, it is difficult to reach the expected action position and play an efficient role when a single chemical growth regulator is added. , the mitigation effect on crop chilling stress is very limited, therefore, it is of great significance to develop a microencapsulated plant antifreeze with responsive release function

Method used

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  • A trigger-controlled release plant antifreeze agent and preparation method thereof
  • A trigger-controlled release plant antifreeze agent and preparation method thereof
  • A trigger-controlled release plant antifreeze agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Firstly, polymer PEG800-DAS was prepared: allyl polyethylene glycol 800 (cas number: 27274-31-3, purchased from Jiangsu Haian Petrochemical Plant) and diallyl sulfide (purchased from Aladdin) were selected. Add 100mL ethanol to a 500mL reaction bottle, put in 10g allyl polyethylene glycol 800, 5g diallyl sulfide, add 0.2g photoinitiator benzoin, and irradiate for 6h under a purple light with a wavelength of 420nm at 300r / s Stir until the reaction is complete, and obtain the polymer PEG800-DAS after rotary evaporation.

[0050] Add 100ml of deionized water to a 200ml reaction bottle, add 1ml of PBS buffer solution with pH 7.2, 5g of water-soluble sugar trehalose, 1g of glucose, 5g of active enzyme superoxide dismutase SOD, 10g of polymer PEG800-DAS, 2g of Tween Stir at -80, 30°C and 800rpm for 10min until uniformly dispersed to obtain the aqueous phase I;

[0051] In a reactor equipped with heating and stirring equipment, add 200ml of organic solvent diethyl ether, 5g o...

Embodiment 2

[0055] In 100ml reaction bottle, add 50ml deionized water, add the HCl-Tris damping fluid 2ml of 1M pH 8.0, 5g trehalose, 1g galactose, 3g peroxidase CAT, 6g polymer PEG800-DAS (preparation method is the same as embodiment 1), 1g OP-10. Stir for 15min at 35°C with a rotation speed of 600rpm until uniformly dispersed to obtain the aqueous phase I;

[0056] In a reactor equipped with heating and stirring equipment, add 150ml of diethyl ether, 3g of diphenylmethane diisocarboxylate (MDI), 8g of fatty acid glycerides and 8g of Nongru 600, and stir for 20min at room temperature at 25°C with a rotation speed of 600rpm Until the solution is uniformly dispersed, the oil phase II is obtained;

[0057] Add the water phase I to the oil phase II, and disperse (that is, emulsify) at 4000rpm with high-speed shear stirring for 600s. After the emulsification is completed, stir at 600rpm for 8h at room temperature to prepare a trigger-controlled release plant antifreeze suspension Add 0.5 g o...

Embodiment 3

[0059] In 100ml reaction bottle, add 50ml deionized water, add the PBS damping fluid 1ml of pH 7.2, 4g trehalose, 2g soybean oligosaccharides, 1g superoxide dismutase SOD, 5g polymer PEG800-DAS (preparation method is the same as embodiment 1), 1g Nongru 1602. Stir for 10min at 35°C with a rotation speed of 600rpm until uniformly dispersed to obtain the aqueous phase I;

[0060] In a reactor equipped with heating and stirring equipment, add 200ml of butyl ether, 4g of diphenylmethane diisocarboxylate (MDI), 8g of isobutanol and 5g of Nongru 700, and stir for 20min at room temperature at 600rpm until dissolved Disperse evenly to obtain oil phase II;

[0061] Add the water phase I to the oil phase II, disperse (that is, emulsify) at 4000rpm with high-speed shear stirring for 200s, and stir at room temperature for 6 hours at 600rpm after the emulsification is completed, and prepare a trigger-controlled release plant antifreeze suspension Add 0.5 g of demulsifier polyoxyethylene p...

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Abstract

The invention discloses a trigger-controlled release plant antifreeze agent and a preparation method thereof. The plant antifreeze is in the form of polymer-coated microcapsules with H 2 o 2 Trigger release characteristics. The plant antifreeze agent provided by the invention has a polymer film, which can effectively protect the active substances loaded in the microcapsules and reduce the loss during transportation and use. Soluble sugar with antifreeze effect is encapsulated in the microcapsules, which can not only protect active enzymes, but also improve the antifreeze performance of crops. Using polythioether compound as membrane material, using thioether and H 2 o 2 The principle of the reaction to generate sulfoxide and sulfone increases the water solubility of the membrane material, thereby realizing the H 2 o 2 (10nmol / L-5000nmol / L concentration range) to trigger the controlled release function. Through the reverse-phase microcapsule preparation, a shell with nano-scale microcapsule particles and oil affinity is prepared to make it easier to be absorbed by plants, so that active substances can reach the affected area and act efficiently.

Description

technical field [0001] The invention belongs to the field of agricultural planting, and in particular relates to a trigger-controlled release plant antifreeze agent and a preparation method thereof. Background technique [0002] Cold stress is an important factor affecting the growth and development of crops in northern my country and reducing crop quality and yield. Cold stress will have varying degrees of impact on the entire growth process of crops, such as seed germination, crop growth and development, yield and quality formation, etc. (Qin Dongling, Li Zhao, Wei Juping, etc. Research progress on crop cold resistance and its chemical control mechanism[ J], Crop Journal, 2016(4): 26-35). After being subjected to cold stress, crops will actively adjust and adapt, and they can induce specific gene expression to reduce the damage of cold stress and adapt to the adversity. However, when the stress intensity is too large or the duration is too long, it will cause irreversible...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N25/28A01N43/16A01N63/50A01P21/00
CPCA01N25/28A01N43/16A01N63/00
Inventor 陶树明刘建国
Owner BEIJING BOYICHENG SCI & TECH