Journal of Advanced Research ( IF 11.4 ) Pub Date : 2020-12-15 , DOI: 10.1016/j.jare.2020.12.006 Jinyun Li 1, 2 , Ming Guo 1, 2 , Yiping Wang 3 , Bihuan Ye 4 , Youwu Chen 4 , Xuejuan Yang 2
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Introduction
Green algae seriously affect the quality and yield of Torreya grandis, it is important to explore new, environmentally friendly ways to control it.
Objectives
The present study aimed at preparing sustained-release algae-killing nanocapsules without pollution to the environment.
Methods
In this work, sodium carboxymethylcellulose (CMC), sodium alginate (SA), and chitosan (CTS) were used as raw materials in acylation reaction with the photosensitive catalytic material iron octaaminophthalocyanine (T) to generate the photoactive bio-based materials T-CMC, T-SA, and T-CMCS. Cinnamaldehyde and 2-aminobenzimidazole were combined using chemical grafting to produce a new algicide, and then formed nanocapsules by phase separation. The molecular structure of products was characterized by UV–Vis, FTIR, and NMR (1H NMR, 13C NMR). The particle size of the nanocapsules was determined by Zeta particle size analysis and TEM; DSC was used to investigate the thermal stability; The encapsulation efficiency and sustained-release performance were determined by HPLC. Then the phytotoxic of the new algicide was measured.
Results
The bio-based nanocapsules was successfully synthesized, which had a particle size of 10–30 nm and was stable at 40 °C. The encapsulation efficiency of the nanocapsules was 48.77%, the cumulative release rate was 83%, and the new algicide killed the green algae in a dose-dependent way.
Conclusions
The bio-based nano capsule is a new and valuable Sustained-release capsule, which is the method of green algae.
中文翻译：
生物缓释纳米胶囊的制备及杀藻性能探讨
介绍
绿藻严重影响香榧的品质和产量，探索新的、环保的防治方法具有重要意义。
目标
本研究旨在制备对环境无污染的缓释杀藻纳米胶囊。
方法
本工作以羧甲基纤维素钠（CMC）、海藻酸钠（SA）和壳聚糖（CTS）为原料，与光敏催化材料八氨基酞菁铁（T）进行酰化反应，生成光敏生物基材料T-CMC 、T-SA 和 T-CMCS。采用化学接枝法将肉桂醛与2-氨基苯并咪唑结合制备新型杀藻剂，然后通过相分离形成纳米胶囊。通过UV-Vis、FTIR、NMR（ 1 H NMR、 13 C NMR）对产物的分子结构进行了表征。通过Zeta粒度分析和TEM测定纳米胶囊的粒径；采用DSC考察热稳定性；通过HPLC测定包封率和缓释性能。然后测量了新型杀藻剂的植物毒性。
结果
成功合成了生物基纳米胶囊，其粒径为10-30 nm，在40℃下稳定。纳米胶囊的包封率为48.77%，累积释放率为83%，新型杀藻剂以剂量依赖性方式杀灭绿藻。
结论
生物基纳米胶囊是一种新型的、有价值的缓释胶囊，它是绿藻的方法。
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