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Ultra-mild crosslinking hyperbranched structure polymer nanometer slow-release material and preparation method and application thereof

A technology of nano slow-release materials and structural polymers, applied in the direction of botany equipment and methods, applications, biocides, etc., can solve the problems of ecological system structure and function damage, low use efficiency, low efficiency, etc., and achieve special structure , Nano size controllable effect

Active Publication Date: 2015-10-21
ANHUI ZHONGBANG BIOLOGICAL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When using these organic solvents and surfactants, there are disadvantages such as poor dispersibility of the original drug and low use efficiency
At the same time, they are highly toxic and not volatile, and will have long-term adverse effects on the soil (including the soil itself, microorganisms in it, and crops, etc.) and the environment
The long-term large-scale and low-efficiency application of pesticides not only poses a serious threat to organisms and human health, but also leads to the destruction of the structure and function of the ecosystem.
[0006] How to prepare new adjuvants and their blended pesticides with good dispersion effect of the original drug, high use efficiency, low toxicity, and less pollution to the soil and the environment, and overcome the current defects is a great challenge

Method used

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  • Ultra-mild crosslinking hyperbranched structure polymer nanometer slow-release material and preparation method and application thereof
  • Ultra-mild crosslinking hyperbranched structure polymer nanometer slow-release material and preparation method and application thereof
  • Ultra-mild crosslinking hyperbranched structure polymer nanometer slow-release material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Example 1: P(OEGMA 50 / tBMA 27 )

[0055] 1. Preparation of hyperbranched polymer

[0056] Ethyl isobromobutyrate (65mg, 0.33mmol), cuprous bromide (47.8mg, 0.33mmol), polyethylene glycol methyl ether methacrylate (OEGMA, 5g, 16.67mmol), anisole (10ml) It was placed in a dry 50ml Schlenk flask, vacuumized after liquid nitrogen freezing - nitrogen filling was repeated three times to remove oxygen, then pentamethyldiethylenetriamine (114.2mg, 0.66mmol) was added with a micro syringe, and then the Schlenk flask was placed Put into the oil bath of 70 ℃ to react, take the sample during the reaction for NMR to determine the monomer conversion rate, when the OEGMA conversion rate reaches 90%, add tert-butyl methacrylate (1.42g, 10mmol ), the reaction continues, and the sample is taken during the reaction for NMR to determine the monomer conversion rate. When the PEGMA conversion rate reaches 90%, the polymerization is terminated. After the reaction solution is passed throug...

Embodiment 2

[0060] Embodiment 2: P(OEGMA 50 / tBMA 45 )

[0061] 1. Preparation of hyperbranched polymer

[0062] Ethyl isobromobutyrate (65mg, 0.33mmol), cuprous bromide (47.8mg, 0.33mmol), polyethylene glycol methyl ether methacrylate (OEGMA, 5g, 16.67mmol), anisole (10ml) Placed in a dry 50ml Schlenk flask, evacuated after liquid nitrogen freezing-nitrogen was repeated three times to remove oxygen, then added pentamethyldiethylenetriamine (114.2mg, 0.66mmol) with a micro syringe, then the Schlenk flask was placed Put it into an oil bath at 70°C for reaction, and take a sample during the reaction for NMR to determine the monomer conversion rate. When the OEGMA conversion rate reaches 90%, add tert-butyl methacrylate (2.37, 16.67 mmol), the reaction continues, and the sample is taken during the reaction for NMR to determine the monomer conversion rate. When the PEGMA conversion rate reaches 90%, the polymerization is terminated. After the reaction solution is passed through the neutral...

Embodiment 3

[0074] Embodiment 3: P(OEGMA 50 / tBMA 63 )

[0075] 1. Preparation of hyperbranched polymer

[0076] Ethyl isobromobutyrate (65mg, 0.33mmol), cuprous bromide (47.8mg, 0.33mmol), polyethylene glycol methyl ether methacrylate (OEGMA, 5g, 16.67mmol), anisole (10ml) It was placed in a dry 50ml Schlenk flask, vacuumized after liquid nitrogen freezing - nitrogen filling was repeated three times to remove oxygen, then pentamethyldiethylenetriamine (114.2mg, 0.66mmol) was added with a micro syringe, and then the Schlenk flask was placed Put into the oil bath of 70 ℃ to react, take a sample during the reaction for NMR to determine the monomer conversion rate, when the OEGMA conversion rate reaches 90%, add tert-butyl methacrylate (3.31g, 23.34mmol), the reaction continues, take a sample during the reaction and do NMR to determine the monomer conversion rate, when the PEGMA conversion rate reaches 90%, the polymerization is terminated, after the reaction solution is passed through th...

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Abstract

The invention discloses an ultra-mild crosslinking hyperbranched structure polymer nanometer slow-release material and a preparation method and application thereof. Raw materials of the polymer nanometer slow-release material comprise monomers A, monomers B, bifunctional crosslinking agents, initiators, catalysts and ligands, wherein the molar ratio of the monomers A, to the monomers B, to the bifunctional crosslinking agents, to the initiators, to the catalysts and to the ligands is (30-50):(20-90):(0.8-1):1:1:2. The polymer nanometer slow-release material has the advantages that the size is controllable, synthesis is convenient, self-assembly is not needed, the object matter loading capacity is high, the polymer nanometer slow-release material is suitable for mass production and low in toxicity, and various functional groups can be led in. The polymer nanometer slow-release material has high loading capacity and good stability. The polymer nanometer slow-release material can be used for loading and slowly releasing non-water-insoluble active substances.

Description

1. Technical field [0001] The invention relates to a slow-release material, in particular to an ultra-slightly cross-linked hyperbranched polymer nano-slow-release material and its preparation method and application. 2. Background technology [0002] Polymer nanomaterials (including colloidal particles, cross-linked colloids, and nanoglues) have attracted much attention. They can be applied in many fields, for example, sustained release of drugs (B.G.De Geest, et al.Chem.Soc.Rev.2007,36,636; A.I.Petrov, et al.Macromolecules 2003,36,10079; T.BShutava, et al .Macromolecules 2005,38,2850; D.E.Discher, et al.Prog.Polym.Sci.2007,32,838; S.P.Armes, et al.Macromol.Rapid Commun.2009,30,267; J.M.J.Fréchet et al.J.Am.Chem.Soc.2004,126,11936), sensors (C.W.Zhao, et al.Macromol.Rapid.Commun.2008,29,1810; D.Roy, et al.Chem.Commun .2009,2106) etc. Polymer nanomaterials are generally prepared by multi-step synthesis, emulsion polymerization, self-assembly techniques, etc. [0003] Alth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08J3/02C08L51/08A01N25/04A01N25/10A01N43/90A01N57/14A01P7/02A01P3/00C09B67/02
Inventor 何涛谢云飞陈志钧丁晨璐
Owner ANHUI ZHONGBANG BIOLOGICAL ENG
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