Alkali lignin (AL), an anionic polymer, is a byproduct of the paper industry. AL was first modified by quaternization to synthesize quaternized alkali lignin (QAL). The aim of the present study is to reveal the effects of sodium dodecyl benzenesulfonate (SDBS) on the microstructure of QAL. The interaction between SDBS and QAL is studied by means of zeta potential, fluorescence spectrophotometer, and static contact angle measurement. The results indicated that there is an electrostatic interaction and a hydrophobic interaction between QAL and SDBS. The SDBS/QAL complex can self-assemble into lignin-based colloidal spheres (LCSs) in an ethanol/water mixture, which have remarkable avermectin (AVM) encapsulation efficiency and antiphotolysis performance. The cumulative release amount of AVM encapsulated by LCS ([email protected]) after 72 h was 77%, and the release was still going on. The release behaviors of [email protected] can be controlled by adjusting the ratio (w/w) of LCS to AVM. More than 85% of AVM could be preserved even after 96 h of UV irradiation. LCS showed controlled release and UV-blocking performance for AVM.

中文翻译：

---

阴离子表面活性剂修饰木质素及其在阿维菌素控释中的应用

碱木质素（AL）是一种阴离子聚合物，是造纸工业的副产品。首先通过季铵化修饰AL，以合成季铵化碱木质素（QAL）。本研究的目的是揭示十二烷基苯磺酸钠（SDBS）对QAL微观结构的影响。通过ζ电势，荧光分光光度计和静态接触角测量研究了SDBS和QAL之间的相互作用。结果表明，QAL和SDBS之间存在静电相互作用和疏水相互作用。SDBS / QAL复合物可以在乙醇/水混合物中自组装成木质素基胶体球（LCS），具有卓越的阿维菌素（AVM）封装效率和抗光解性能。LCS（[受电子邮件保护]）封装的AVM在72小时后的累积释放量为77％，并且发布仍在继续。可以通过调整LCS与AVM的比率（w / w）来控制[受电子邮件保护]的释放行为。即使在紫外线照射96小时后，仍可以保留超过85％的AVM。LCS对AVM表现出控制释放和紫外线阻隔性能。