.png){kind=icon}
.png){kind=icon}
Return
Sodium alginate/carboxymethyl chitosan composite hydrogel beads for pH/redox dual-responsive pesticide release
.png){kind=icon}
PRE
AI
X
Y
Y
P
DOI：10.1016/j.reactfunctpolym.2026.106659.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
Pesticides are essential for agricultural production; however, their improper application can result in ecological damage and potential threats to human health. Therefore, the development of pesticide-controlled-release systems is crucial for the sustainable progress of agriculture and society. This work presents a novel strategy for fabricating a polyelectrolyte hydrogel bead-based pesticide-controlled-release system. The process involves blending a sodium alginate/carboxymethyl chitosan (SA/CMCS) solution with cystine dihydrochloride (CYS), followed by introducing the mixture into a citric acid (CA) solution. The abundant protonated amino groups (-NH3+) and carboxylate anions (-COO-) within the system facilitate the formation of CMCS/SA-CYS/CA composite hydrogel beads (CHGB), subsequently loaded with thiamethoxam (TMX) to create TMX-loaded CHGB (TCHGB) for investigations into drug loading and responsive release. The CHGB exhibits remarkable swelling properties (up to 4200%), along with pH and redox sensitivity. And the release of TMX from TCHGB displays favorable responsiveness to pH and redox stimuli. Under alkaline conditions (pH 9.0) and reductive surroundings (containing glutathione), the cumulative release ratio of TMX surpasses 95%. Furthermore, it has been demonstrated that the release kinetics of TMX comply with Fickian diffusion described by the Korsmeyer-Peppas model. The discoveries of this study hold considerable research and practical value in the domain of controlled-release agricultural chemicals.
Keywords:
Composite hydrogel beads
pH/redox dual-responsive
Pesticide release
Sodium alginate
Journal
R
IF:
5.1
Papers:
23
Citations:
0
Organization
Cited Papers