Lignin Nanoparticles: Green Synthesis in a γ-Valerolactone/Water Binary Solvent and Application to Enhance Antimicrobial Activity of Essential Oils,ACS Sustainable Chemistry & Engineering

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Lignin Nanoparticles: Green Synthesis in a γ-Valerolactone/Water Binary Solvent and Application to Enhance Antimicrobial Activity of Essential Oils
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2019-12-17 , DOI: 10.1021/acssuschemeng.9b06716
Liheng Chen _{1,

2} , Yunfeng Shi ₂ , Bo Gao ₂ , Yilun Zhao ₂ , Yueming Jiang ₃ , Zhengang Zha ₁ , Wei Xue _{1,

2} , Liang Gong _{3,

4}

Affiliation

Lignin nanoparticles (LNPs), as a special aggregate of renewable and biodegradable lignin available in abundant amounts, are a perfect building-block material because of their advantages, including good dispersibility in water, great biocompatibility, and eco-friendly characteristics. To exploit a promising method of producing LNPs, we developed a simple and sustainable synthesis approach using a recycled γ-valerolactone (GVL)/water binary solvent (GWBS). Up to 200 g/L lignin from several sources could be completely dissolved in GWBS. LNPs were easily obtained through nanoprecipitation (dropping or dialysis) of the lignin solution. The yield and size of LNPs can be controlled during nanoprecipitation. The highest yield of LNP reached 90% via dropping nanoprecipitation, and its relevant initial concentration was up to 24 g/L. This highly efficient dropping method might provide a method for scaled-up production of LNPs. The resultant LNPs, having a diameter of ca. 250 nm and a ζ-potential of −40 mV, also showed good dispersibility and stability in water. LNPs can stabilize essential oils and promote their growth inhibition activity against microbes. These results indicated that we also initiated a new method of achieving enhanced antimicrobials with whole biomass-based chemicals.

中文翻译：

木质素纳米颗粒：γ-戊内酯/水二元溶剂中的绿色合成及其在增强精油抗菌活性中的应用

木质素纳米颗粒（LNPs）作为大量可再生和可生物降解的木质素的特殊聚集体，由于其优点包括在水中的良好分散性，良好的生物相容性和环保特性，是一种理想的构建材料。为了开发一种有前途的生产LNP的方法，我们开发了一种简单且可持续的合成方法，使用的是回收的γ-戊内酯（GVL）/水二元溶剂（GWBS）。来自多个来源的高达200 g / L的木质素可以完全溶解在GWBS中。通过木质素溶液的纳米沉淀（滴入或渗析）可以轻松获得LNP。LNP的产量和大小可以在纳米沉淀过程中控制。通过滴落纳米沉淀，LNP的最高收率达到90％，其相关的初始浓度高达24 g / L。这种高效的滴落方法可能会为大规模生产LNP提供一种方法。所得的LNP的直径约为1。250 nm和−40 mV的ζ电位在水中也显示出良好的分散性和稳定性。LNP可以稳定香精油并促进其对微生物的生长抑制活性。这些结果表明，我们还启动了一种以全生物质为基础的化学品实现增强抗菌效果的新方法。

更新日期：2019-12-18

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