College of Engineering, Zhejiang A&F University, Hangzhou, Zhejiang 311300, China.
College of Science, Zhejiang A&F University, Hangzhou, Zhejiang 311300, China.
J Adv Res. 2020 Dec 15;31:87-96. doi: 10.1016/j.jare.2020.12.006. eCollection 2021 Jul.
Green algae seriously affect the quality and yield of Torreya grandis, it is important to explore new, environmentally friendly ways to control it.
The present study aimed at preparing sustained-release algae-killing nanocapsules without pollution to the environment.
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 (H NMR, C 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.
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.
The bio-based nano capsule is a new and valuable Sustained-release capsule, which is the method of green algae.
绿藻严重影响了 Torreya grandis 的质量和产量，探索新的、环保的方法来控制它是很重要的。
本研究旨在制备无污染环境的缓释杀藻纳米胶囊。
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，与光敏催化材料铁八氨基酞菁（T）进行酰化反应，生成光活性生物基材料 T-CMC、T-SA 和 T-CMCS。肉桂醛与 2-氨基苯并咪唑通过化学接枝反应生成新型杀藻剂，然后通过相分离形成纳米胶囊。采用紫外可见光谱（UV-Vis）、傅里叶变换红外光谱（FTIR）和核磁共振（H NMR、C NMR）对产物的分子结构进行了表征。采用 Zeta 粒径分析和透射电镜（TEM）测定纳米胶囊的粒径；采用差示扫描量热法（DSC）研究其热稳定性；采用高效液相色谱法（HPLC）测定包封率和缓释性能。然后测定了新型杀藻剂的植物毒性。
成功合成了生物基纳米胶囊，其粒径为 10-30nm，在 40°C 下稳定。纳米胶囊的包封率为 48.77%，累积释放率为 83%，新型杀藻剂对绿藻具有剂量依赖性杀伤作用。
生物基纳米胶囊是一种新的、有价值的缓释胶囊，是一种绿色杀藻方法。
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