Novel fabrication of stable Pickering emulsion and latex by hollow silica nanoparticles
Novel fabrication of stable Pickering emulsion and latex by hollow silica nanoparticles
复制标题
空心二氧化硅纳米粒子新型制备稳定皮克林乳液和胶乳
DOI：
10.1016/j.jcis.2019.06.008
复制
发表时间：
2019-10-01
影响因子：
9.9
通讯作者：
Simion, Demetra
中科院分区：
文献类型：
--
作者：
Bao, Yan;Zhang, Yuanxia;Simion, Demetra
假设：在传统的Pickering乳液中，固体纳米颗粒通常用作稳定剂。然而，由于中空纳米粒子具有较强的吸附性能和较低的密度，使其成为稳定Pickering乳液和胶乳的理想选择。实验：为了考察中空纳米粒子在稳定乳液方面的优越性，以中空纳米粒子为稳定剂制备了Pickering乳液和聚丙烯酸酯胶乳。为了比较的目的，油/水乳液和聚丙烯酸酯乳液制备使用十二烷基硫酸钠或二氧化硅纳米粒子作为稳定剂，也没有稳定剂制备结果：结果表明，中空二氧化硅粒子的稳定能力是可比的表面活性剂和上级比传统的二氧化硅纳米粒子。空心纳米二氧化硅粒子在乳胶粒表面的不可逆吸附和有效的机械屏障作用是其优异乳化性能和稳定性的主要原因。此外，中空二氧化硅纳米粒子的空腔结构赋予的低密度是制备稳定的Pickering乳液和胶乳的主要原因。这一工作拓宽了我们对影响Pickering乳液和胶乳稳定性的因素的理解。(C)2019爱思唯尔公司All rights reserved.
Hypothesis: In conventional Pickering emulsions, solid nanoparticles are usually employed as stabilizers. However, hollow nanoparticles are desirable candidates for the stabilization of Pickering emulsion and latex due to their strong adsorption property and low density stemming from the hollow cavity structure.Experiments: In order to investigate the superiority of hollow silica nanoparticles in stabilizing emulsions, Pickering emulsion and polyacrylate latex were fabricated using hollow silica nanoparticles as stabilizers. For comparison purposes, oil/water emulsions and polyacrylate latices were prepared using sodium dodecylsulfate or silica nanoparticles as stabilizers, also they were prepared without the stabilizer.Findings: The results showed that the stabilizing capability of hollow silica particles was comparable to surfactants and superior to conventional silica nanoparticles. Irreversible adsorption and effective mechanical barrier of hollow silica nanoparticles at the surface of latex particles were responsible for the outstanding emulsifying property and stability. Furthermore, the low density of hollow silica nanoparticles imparted by their cavity structure was the primary reason for the fabrication of stable Pickering emulsion and latex. This work broadens our understanding of the factors influencing the stability of Pickering emulsion and latex. (C) 2019 Elsevier Inc. All rights reserved.