4-Amion-2,2,6,6-tetramethylpiperidine (Temp) was grafted into sodium lignosulfonate (SL) to obtain hindered amine-modified lignosulfonate (SL–Temp). Then, the polymer surfactant (SL–Temp–CTAB) was prepared using cetyltrimethylammonium bromide (CTAB) and SL–Temp. Obtained SL–Temp–CTAB was used as an emulsifier to prepare a green emulsifiable concentrate (EC) of avermectin (AVM), which shows good emulsifying property and storage stability. The prepared AVM green EC can form AVM-loaded microspheres with nanometer particle size distribution after emulsification in water. After ultraviolet irradiation for 70 h, the AVM retention rate of the green EC prepared using SL–Temp–CTAB was 75.8%, which is much higher than that of commercial EC (0.4%) and the green EC prepared using unmodified SL (31.4%). Moreover, the AVM green EC prepared using SL–Temp–CTAB has slow-release performance, and the release equilibrium time is 5.3 times the commercial EC. Therefore, the newly prepared AVM green EC using a lignin-based functional emulsifier shows good antiphotolysis and slow-release performance compared to the traditional EC.

中文翻译：

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受阻胺接枝木质素基乳化剂的合成及其在绿色乳油中的应用

将4-Amion-2,2,6,6-四甲基哌啶（Temp）接枝到木质素磺酸钠（SL）中，以获得受阻胺改性的木质素磺酸盐（SL–Temp）。然后，使用十六烷基三甲基溴化铵（CTAB）和SL–Temp制备聚合物表面活性剂（SL–Temp–CTAB）。将获得的SL–Temp–CTAB用作乳化剂来制备阿维菌素（AVM）的绿色乳化浓缩剂（EC），该乳化剂具有良好的乳化性能和储存稳定性。制备的AVM绿色EC在水中乳化后，可以形成纳米级粒径分布的AVM负载微球。紫外线照射70 h后，使用SL–Temp–CTAB制备的绿色EC的AVM保留率为75.8％，远高于商业EC（0.4％）和使用未修饰SL制备的绿色EC（31.4％）。 ）。而且，使用SL–Temp–CTAB制备的AVM绿色EC具有缓释性能，其释放平衡时间是市售EC的5.3倍。因此，与传统乳油相比，使用木质素基功能乳化剂新制备的AVM绿色乳油显示出良好的抗光解性能和缓释性能。