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TECHNOLOGICAL WATCH

Type of information: TECHNICAL ARTICLES

In this section, you can access to the latest technical information related to the PISA project topic.

Synthesis and characterization of biodegradable multicomponent amphiphilic conetworks with tunable swelling through combination of ring?opening polymerization and “click” chemistry method as a controlled release formulation for 2,4?dichlorophenoxyacetic acid herbicide

Multicomponent (two, three, and four component) amphiphilic conetworks (APCNs) with tunable swelling behaviors were fabricated through the ring opening polymerization and click chemistry utilizing various combinations of azide and alkyne functionalized poly (ethylene glycol) (PEG) and poly (caprolactone) (PCL) precursors. Prepare azido?terminated star?shaped PCL, azido?terminated PEG, alkyne?terminated PEG, and propargylated pentaerythritol were characterized by hydrogen?1 proton nuclear magnetic resonance (1H NMR) and Fourier?transform infrared (FT?IR) spectroscopy. The morphology and thermal behavior of the APCNs were studied by scanning electron microscopy (SEM) and differential scanning calorimetry (DSC). The swelling behavior of APCNs could be manipulated through an establishment of a balance between hydrophilic segments, hydrophobic segments, and cross?linking density. The 2,4?dichlorophenoxyacetic acid (2,4?D) herbicide was entrapped in APCNs as a model agrochemical to study the release profile from APCNs. The obtained results showed that the release of 2,4?D could be controlled by the swelling degree of APCNs. Finally, the biodegradability rates of APCNs were investigated in agricultural soil. The results exhibited that the decrease in the swelling degree led to decreased degradation rate of APCNs. According to obtained results, these APCNs could be used as biomaterials for the controlled release of agrochemicals.

» Author: Alaleh Dabbaghi, Sohrab Rahmani

» Reference: doi:10.1002/pat.4474

» Publication Date: 26/10/2018

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