Synthesis of anti-photolysis lignin-based dispersant and its application in pesticide suspension concentrate.

In the formulation of pesticide Suspension Concentrate (SC), some photosensitive pesticides are easily decomposed in the preparation. In this study, a hindered amine modified lignosulfonate (SL-Temp) with anti-photolysis function was synthesized using 4-amino-2,2,6,6-tetramethylpiperidine (Temp) and Sodium Lignosulfonate (SL) to solve this problem. The obtained SL-Temp was used as a dispersant to prepare 5% SC of avermectin, which shows good physical stability.

Preparation of self-dispersed lignin-based drug-loaded material and its application in avermectin nano-formulation.

In this work, the anionic and cationic lignin-based drug-loaded materials (SL/CTAB) with strong hydrophobicity were prepared by using Sodium Lignosulfonate (SL) via self-assembly. The obtained SL/CTAB was used as drug-loaded material and emulsifier to prepare avermectin nano-formulation, which can be automatically dispersed into nano drug-loaded nanospheres in water. The cold and hot storage experiments show that the physical and chemical stability of the nano-formulation is good.

Synthesis of a Hindered Amine-Grafted Lignin-Based Emulsifier and Its Application in a Green Emulsifiable Concentrate.

4-Amion-2,2,6,6-tetramethylpiperidine (Temp) was grafted into sodium lignosulfonate (SL) to obtain hindered amine-modified lignosulfonate (SL-Temp). Then, the polymer surfactant (SL-Temp-CTAB) was prepared using cetyltrimethylammonium bromide (CTAB) and SL-Temp. Obtained SL-Temp-CTAB was used as an emulsifier to prepare a green emulsifiable concentrate (EC) of avermectin (AVM), which shows good emulsifying property and storage stability.