A bio-based pesticide sustained release system constructed from cellulose-chitosan hydrogel: Promoting seed germination and providing protection

IF 5.1 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers Pub Date : 2025-07-12 DOI:10.1016/j.reactfunctpolym.2025.106405

Linan Sun , Tao Wang , Bingyang Qin , Chengdong Nie , Jingru Zhao , Yujie Fu

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Abstract

Water is essential for crop growth, particularly during the seed germination stage. This study proposes a novel strategy utilizing a natural bio-based hydrogel to enhance soil water retention and improve the hydration capacity for seeds. A hydrogel (CMC-Na/HACC/FeCl₃), synthesized from sodium carboxymethyl cellulose (CMCNa) and chitosan quaternary ammonium salt (HACC) via ferric chloride (FeCl₃), has the advantages of high stability and low cytotoxicity. Upon water absorption, the swelling degree of CMC-Na/HACC/FeCl₃ exceeds 20 g/g, providing sufficient moisture for plant growth. The experimental results showed that CMC-Na/HACC/FeCl₃ could significantly increase the seed germination rate compared with the traditional soil, and the germination rate could be up to 75 %, and the germination time, the length of germ and the length of the embryonic axis were significantly improved. In addition, in this study, the plant extracted insecticide matrine (MT) was added into the hydrogel system to form CMC-Na/HACC/FeCl₃/MT. The results of the study showed that MT could be gradually released from the hydrogel, and the release time could last for 21 days. The hydrogel provided moisture to the seeds while creating a barrier against pest invasion and showed significant antibacterial effects. Both CMC-Na/HACC/FeCl₃ and CMC-Na/HACC/FeCl₃/MT are anticipated to be valuable in agricultural production due to their excellent properties, which contribute to improving soil composition and minimizing resource waste and environmental pollution.

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纤维素-壳聚糖水凝胶构建的生物基农药缓释体系：促进种子萌发并提供保护

水是作物生长所必需的，特别是在种子萌发阶段。本研究提出了一种利用天然生物基水凝胶增强土壤保水性和提高种子水化能力的新策略。以羧甲基纤维素钠（CMCNa）和壳聚糖季铵盐（HACC）为原料，经三氯化铁（FeCl3）合成了一种稳定性高、细胞毒性低的水凝胶（CMC-Na/HACC/FeCl3）。CMC-Na/HACC/FeCl3吸水后溶胀度超过20 g/g，为植物生长提供了充足的水分。实验结果表明，CMC-Na/HACC/FeCl3与传统土壤相比，可显著提高种子发芽率，发芽率可达75%，萌发时间、胚芽长度和胚轴长度均有显著提高。此外，本研究将植物提取的杀虫剂苦参碱（MT）加入到水凝胶体系中，形成CMC-Na/HACC/FeCl3/MT。研究结果表明，MT可逐渐从水凝胶中释放，释放时间可达21天。水凝胶在为种子提供水分的同时，对害虫的入侵形成了屏障，并显示出显著的抗菌效果。CMC-Na/HACC/FeCl3和CMC-Na/HACC/FeCl3/MT均具有改善土壤组成、减少资源浪费和环境污染的优良性能，有望在农业生产中发挥重要作用。

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来源期刊

Reactive & Functional Polymers 工程技术-高分子科学

CiteScore

8.90

自引率

5.90%

发文量

259

审稿时长

27 days

期刊介绍： Reactive & Functional Polymers provides a forum to disseminate original ideas, concepts and developments in the science and technology of polymers with functional groups, which impart specific chemical reactivity or physical, chemical, structural, biological, and pharmacological functionality. The scope covers organic polymers, acting for instance as reagents, catalysts, templates, ion-exchangers, selective sorbents, chelating or antimicrobial agents, drug carriers, sensors, membranes, and hydrogels. This also includes reactive cross-linkable prepolymers and high-performance thermosetting polymers, natural or degradable polymers, conducting polymers, and porous polymers. Original research articles must contain thorough molecular and material characterization data on synthesis of the above polymers in combination with their applications. Applications include but are not limited to catalysis, water or effluent treatment, separations and recovery, electronics and information storage, energy conversion, encapsulation, or adhesion.