Application Potential of Temperature-Responsive Polyaspartic Acid-Based Superabsorbent Composites in Abiotic Stress...

Area of Science:

• Materials Science
• Polymer Chemistry
• Environmental Science

Background:

• Superabsorbent composites (SACs) are vital for addressing abiotic stresses like soil drought and salinization.
• High costs and environmental concerns hinder the widespread adoption of current SACs.

Purpose of the Study:

• To develop low-cost, environmentally friendly SACs using readily available materials.
• To optimize the water absorption and retention properties of these novel SACs for agricultural applications.

Main Methods:

• Synthesis of PASP-g-P-(AA-co-NIPAM)/DT SACs via aqueous free radical polymerization.
• Optimization of SACs' water absorption by adjusting reactant ratios.
• Evaluation of water uptake, retention, repeated swelling, temperature responsiveness, and salinity resistance.

Main Results:

• Optimized SACs demonstrated high water uptake capacities: 672.7 g/g (distilled water), 147.9 g/g (tap water), and 80.4 g/g (0.9 wt% NaCl).
• Excellent water retention (62.06% after 12h at 40°C) and stability over five swelling cycles (65.32% retained capacity).
• Unique temperature responsiveness and demonstrated stability across varying salinity and pH conditions.

Conclusions:

• The developed SACs offer a cost-effective and eco-friendly alternative for mitigating abiotic stresses in agriculture.
• Their robust water management capabilities and environmental stability highlight significant potential for sustainable agriculture.