Silk fibroin (SF) was considered as emulsifier due to its inherent amphiphilicity. Nevertheless, SF was also speculated to act as a stabilizer in emulsions because of its self-assembly in the interfaces and formation of viscoelastic surface or interfacial layers. Here, the emulsions were produced by mixing SF with 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO)-oxidized nanocellulose (TOCN) or partially-deacetylated nanochitin (DEChN) as a continuous phase. The performance of emulsions was examined in regard to the concentrations of TOCN, DEChN, and SF. And comparative emulsions stabilized by conventional surfactants alongside TOCN or DEChN were prepared. Emulsion stability and droplet size were influenced by TOCN or DEChN concentration, while SF concentration played a minor role. SF exhibited stability enhancement compared to conventional surfactants. Overall, emulsions remained highly stable over 30 days with substantial TOCN, DEChN, and SF (≥ 0.4%) concentrations. This work provides valuable insights into choosing stabilizers or emulsifiers for use in the emulsion.

中文翻译：

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纳米纤维素/纳米几丁质和丝素蛋白组合而成的皮克林乳液：丝素蛋白作为稳定剂或乳化剂

丝素蛋白（SF）由于其固有的两亲性而被认为是乳化剂。然而，由于 SF 在界面中自组装并形成粘弹性表面或界面层，人们推测 SF 也可作为乳液中的稳定剂。在这里，乳液是通过将 SF 与 2,2,6,6-四甲基哌啶-1-氧基自由基 (TEMPO)-氧化纳米纤维素 (TOCN) 或部分脱乙酰化纳米甲壳质 (DEChN) 混合作为连续相来生产的。根据 TOCN、DEChN 和 SF 的浓度检查乳液的性能。并制备了由常规表面活性剂与 TOCN 或 DEChN 一起稳定的对比乳液。乳液稳定性和液滴尺寸受 TOCN 或 DEChN 浓度的影响，而 SF 浓度的影响较小。与传统表面活性剂相比，SF 表现出稳定性增强。总体而言，乳液在 30 天内保持高度稳定，且 TOCN、DEChN 和 SF (≥ 0.4%) 浓度较高。这项工作为选择乳液中使用的稳定剂或乳化剂提供了宝贵的见解。