Nano pesticide preparation based on boron nitride nanosheet grafted hydrophilic macromolecules and preparation method thereof

A technology of hydrophilic polymers and nano-pesticides, which is applied in the field of nano-pesticide preparations and preparations based on boron nitride nanosheets grafted with hydrophilic polymers, can solve problems that have not yet been seen, and achieve obvious pH-responsive controlled release characteristics, Promotes wettability and leaf surface adhesion, strong load-carrying effect

Active Publication Date: 2020-07-14
ZHONGKAI UNIV OF AGRI & ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] At present, there is no relevant report on chemic

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  • Nano pesticide preparation based on boron nitride nanosheet grafted hydrophilic macromolecules and preparation method thereof
  • Nano pesticide preparation based on boron nitride nanosheet grafted hydrophilic macromolecules and preparation method thereof
  • Nano pesticide preparation based on boron nitride nanosheet grafted hydrophilic macromolecules and preparation method thereof

Examples

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Example Embodiment

[0036] Example 1

[0037] This embodiment is an embodiment of the preparation method of the nano-pesticide preparation based on boron nitride nanosheet grafted with hydrophilic polymer according to the present invention. The preparation method includes the following steps:

[0038] (1) Preparation of BNNP: Disperse h-BN powder in hydrochloric acid with a pH of 3 for activation. After activation for 24 hours, centrifuge and wash with deionized water for several times. After suction filtration, dry at 85°C for 24 hours to obtain activated h-BN powder, and then disperse the activated h-BN powder in isopropanol, sonicate the dispersion for 6 hours at room temperature to strip the dispersion liquid, and then centrifuge at 4000 rpm for 90 min to remove large particles of h-BN. The supernatant is mainly composed of several thin layers of hexagonal boron nitride nanosheets, the supernatant is washed several times with ethanol and then filtered, the solid is collected and dried at 80°C for ...

Example Embodiment

[0041] Example 2

[0042] This embodiment is an embodiment of the preparation method of the nano-pesticide preparation based on boron nitride nanosheet grafted hydrophilic polymer according to the present invention. The preparation method except that the hydrothermal reaction temperature in step (2) is 110°C, Others are the same as in Example 1.

Example Embodiment

[0043] Example 3

[0044] This example is an example of the preparation method of the nano-pesticide preparation based on the boron nitride nanosheet grafted with hydrophilic polymer according to the present invention. The method except for the mass ratio of BNNP, PEG, MPTMS and water in step (2) is BNNP: PEG: MPTMS: water = 1:2:0.5:4, the temperature of the hydrothermal reaction is 80° C., and the time of the hydrothermal reaction is 12 hours, and everything else is the same as in Example 1.

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Abstract

The invention provides a nano pesticide preparation based on boron nitride nanosheet grafted hydrophilic macromolecules and a preparation method thereof, and belongs to the technical field of nano pesticide preparations. Biocompatible hydrophilic macromolecules and mercaptosilane are grafted to the surface of the hexagonal boron nitride nanosheet through condensation and Michael addition reaction;the interaction between the raw materials promotes the hexagonal boron nitride powder to form rich orderly arranged thin-layer-shaped nano channels, and the nano-pesticide carrier has a nano-constraint effect on hydrophobic pesticide loading and delivery. Besides, through the synergistic combination of hydrophobic-hydrophobic interaction, [pi]-[pi] accumulation and electrostatic interaction, theelectrostatic interaction is enhanced; the nano pesticide carrier has higher drug loading capacity and remarkable pH response controlled release behavior, improves the wetting and affinity of pesticide leaf surfaces, has the capability of effectively shielding ultraviolet radiation, and can be used as an environment-friendly and stable water-based nano pesticide carrier.

Description

technical field [0001] The invention belongs to the technical field of nano-pesticide preparations, and relates to a nano-pesticide preparation based on boron nitride nanosheets grafted with hydrophilic polymers and a preparation method thereof. Background technique [0002] A large number of pesticides used in pest control are likely to cause pesticide residues and seriously pollute the ecological environment. The limitations of traditional chemical pesticides are mainly due to their instability and the widespread use of organic solvents for dispersion in the actual spraying process. Therefore, there is an urgent need for a more environmentally friendly water-based pesticide controlled-release drug delivery system. The vigorous development of precision agriculture also requires that pesticide molecules can reach plants and be targeted and transported in a more controllable manner. [0003] Utilizing environmentally friendly nanomaterials and customizing "nanotransmission ...

Claims

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Application Information

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IPC IPC(8): A01N25/10A01N25/22
CPCA01N25/10A01N25/22
Inventor 郝丽周新华周红军关梅龚丽红
Owner ZHONGKAI UNIV OF AGRI & ENG
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