Light response controlled-release pesticide film and preparation method and applications thereof
A controlled-release pesticide and light-responsive technology, applied in botany equipment and methods, applications, chemicals for biological control, etc., can solve the problems of difficult control of the degree of formation and film properties, achieve optimistic market application prospects, reduce Loss, wide range of effects
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Embodiment 1
[0027] Example 1 Photoresponsive Controlled Release Carrier
[0028] Under nitrogen protection, dissolve 1 mmol of spiropyran compound and 1.5 mmol of polyacrylic acid compound into 15 mL of ethylene glycol ether, stir well, add 1.5 mmol of EDCI and 1.5 mmol of NHS, and react in the dark for 50 hours. After the reaction is completed, use The photoresponsive controlled-release carrier 1 of spiropyran-grafted polyacrylic acid was obtained by dialysis to neutrality in ionized water and freeze-drying.
[0029] The spiropyran compound is a nitrogen-substituted C3 carboxyl spiropyran derivative.
[0030] The polyacrylic acid compound is polymethacrylic acid with a molecular weight of 25,000.
Embodiment 2
[0031] Example 2 Photoresponsive Controlled Release Carrier
[0032] Under the protection of nitrogen, dissolve 1 mmol of spiropyran compound and 1 mmol of polyacrylic acid compound into 10 ml of DMSO, stir well, add 1.0 mmol of DMAP and 1.2 mmol of DCC, and react in the dark for 50 hours. After the reaction is completed, post-process to obtain spiropyran Photoresponsive controlled-release carrier grafted with polyacrylic acid 2.
[0033] The spiropyran compound is a nitrogen-substituted C2 hydroxyl spiropyran derivative.
[0034] The polyacrylic acid compound is polyacrylic acid with a molecular weight of 20,000.
[0035] The post-treatment method includes filtering the mixture, distilling the solvent under reduced pressure, precipitating with anhydrous methanol, filtering, and vacuum drying at 50°C.
Embodiment 3
[0036] Example 3 Photoresponsive Controlled Release Carrier
[0037] Under nitrogen protection, dissolve 1 mmol of spiropyran compound and 3 mmol of polyacrylic acid compound into 30 ml of DMSO, stir evenly, add 1.0 mmol of DMAP and 3.0 mmol of DCC, and react in the dark for 50 hours. After the reaction is completed, post-process to obtain spiropyran Photoresponsive controlled-release carrier grafted with polyacrylic acid 3.
[0038] The spiropyran compound is a nitrogen-substituted C2 hydroxyl spiropyran derivative.
[0039] The polyacrylic acid compound is polyacrylic acid with a molecular weight of 20,000.
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