Water-in-water (w/w) emulsions can mimic biological environments, and their stability is ensured by adding nanoparticles capable of adsorbing at liquid-liquid interfaces. To enhance the properties of w/w emulsions, there is a search for new sources of nanoparticles that are attractive for the food and biomedical fields. Thus, the present study investigated the use of sugarcane bagasse lignin (a cheap, nontoxic, and biodegradable polymer) as a source of nanoparticles for Pickering emulsions with maltodextrin (MD) and polyethylene glycol 6000 (PEG 6000). The nanoparticles were prepared from alkaline lignin (ALNP) and oxidized alkaline lignin (OLNP), and their application was performed using different dosages in the w/w systems (0%, 0.1%, 0.3%, 0.5%, and 1%, wt/wt). The nanoparticles presented different sizes, with OLNPs (327.8 nm) being smaller than ALNPs (689.8 nm). The systems with OLNPs showed better emulsification indices and smaller droplet sizes than systems with ALNPs. The concentration of nanoparticles and the volume of the dispersed phase influence the stability of the studied emulsion. The most promising stabilization results were obtained at a concentration of 1% wt/wt of OLNPs with an emulsification index of up to 63%. These results, combined with the extensive availability of functional groups in lignin, make this polymer a potential candidate for advanced studies of w/w emulsions.

中文翻译：

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木质素纳米粒子的合成及其在水包水皮克林乳液稳定中的应用：甘蔗渣木质素增值新技术

水包水（w/w）乳液可以模拟生物环境，并且通过添加能够吸附在液-液界面上的纳米颗粒来确保其稳定性。为了增强w/w乳液的特性，人们正在寻找对食品和生物医学领域有吸引力的纳米颗粒的新来源。因此，本研究调查了使用甘蔗渣木质素（一种廉价、无毒且可生物降解的聚合物）作为含有麦芽糖糊精 (MD) 和聚乙二醇 6000 (PEG 6000) 的皮克林乳液的纳米颗粒来源。纳米颗粒由碱性木质素 (ALNP) 和氧化碱性木质素 (OLNP) 制备，并在 w/w 系统中使用不同剂量（0%、0.1%、0.3%、0.5% 和 1%，wt）进行应用。 /重量）。纳米粒子呈现出不同的尺寸，OLNP (327.8 nm) 小于 ALNP (689.8 nm)。与具有 ALNP 的系统相比，具有 OLNP 的系统表现出更好的乳化指数和更小的液滴尺寸。纳米粒子的浓度和分散相的体积影响所研究乳液的稳定性。最有希望的稳定结果是在 OLNP 浓度为 1% wt/wt 时获得的，乳化指数高达 63%。这些结果，加上木质素中官能团的广泛可用性，使该聚合物成为 w/w 乳液高级研究的潜在候选者。