Nanoporous 3D Polyurethane for Toosendanin Adsorption, Encapsulation, and High-Efficient Utilization.

Area of Science:

• Materials Science
• Polymer Chemistry
• Environmental Science

Background:

• Pesticide delivery systems require improved efficiency and reduced environmental impact.
• Nanoporous materials offer unique properties for controlled release applications.
• Toosendanin (TSN) is a pesticide with potential benefits but requires optimized delivery.

Purpose of the Study:

• To synthesize and characterize a novel nanoporous 3D-polyurethane (3D-PU) material.
• To evaluate the adsorption capabilities of 3D-PU for toosendanin (TSN).
• To assess the performance enhancement of TSN when encapsulated in 3D-PU.

Main Methods:

• Preparation of 3D-PU using nano-CaCO3 templating and acid etching.
• Characterization of pore size, surface area (BET), and adsorption properties.
• Adsorption isotherm, kinetic, and thermodynamic studies for TSN.
• Evaluation of encapsulated TSN's effective period, photolysis, and toxicity.

Main Results:

• Synthesized 3D-PU with nanopores (48-72 nm) and high surface area (468.0 m²/g).
• Achieved high theoretical adsorption capacity for TSN (361.6 mg/g) via chemisorption.
• Demonstrated improved TSN performance: extended effective period (11 days), increased photolysis half-life (3.2x), and reduced LC50 for Aphis citricola (6.0x).

Conclusions:

• 3D-PU is a promising carrier for pesticide adsorption and encapsulation.
• The material enhances TSN's safety, efficiency, and environmental profile.
• This technology holds potential for broader applications in pesticide utilization.