Pickering Emulsion Gels Based on Halloysite Nanotubes and Ionic Biopolymers: Properties and Cleaning Action on Marble Surface,ACS Applied Energy Materials

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Pickering Emulsion Gels Based on Halloysite Nanotubes and Ionic Biopolymers: Properties and Cleaning Action on Marble Surface
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2019-05-03 00:00:00 , DOI: 10.1021/acsanm.9b00487
Giuseppe Cavallaro _{1,

2} , Stefana Milioto _{1,

2} , Läysän Nigamatzyanova ₃ , Farida Akhatova ₃ , Rawil Fakhrullin ₃ , Giuseppe Lazzara _{1,

2}

Affiliation

We have fabricated ecocompatible Pickering emulsions based on halloysite nanotubes and ionic biopolymers (chitosan and pectin) from renewable resources. The effect of pectin and chitosan on the Pickering emulsion was investigated by direct visualization of the oil droplets and by the thermodynamic characterization at the interface. Pectin enhances the Pickering emulsion stability, while a phase separation and nonhomogeneous gel was observed in the presence of chitosan. We have demonstrated that the Pickering emulsion in a pectin based gel phase is suitable for wax layer removal from a marble surface. A controlled cleaning is achieved by tuning the contact time between the gel and the marble surface. Due to its nonhomogeneous structure, chitosan-based gel does not show proper wax removal ability. This work opens up a new sustainable approach in preparing cleaning formulations for conservation of cultural heritage.

中文翻译：

基于埃洛石纳米管和离子型生物聚合物的Pickering乳液凝胶：在大理石表面的性质和清洁作用

我们已经从可再生资源中制备了基于埃洛石纳米管和离子型生物聚合物（壳聚糖和果胶）的生态相容性Pickering乳液。通过直接观察油滴并通过界面处的热力学表征，研究了果胶和壳聚糖对Pickering乳液的影响。果胶增强了Pickering乳液的稳定性，而在壳聚糖的存在下观察到相分离和不均匀的凝胶。我们已经证明，基于果胶的凝胶相中的Pickering乳液适用于从大理石表面去除蜡层。通过调整凝胶与大理石表面之间的接触时间，可以实现受控的清洁。由于其非均质结构，基于壳聚糖的凝胶没有显示适当的除蜡能力。

更新日期：2019-05-03

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