将乳液滴和纳米颗粒封装在纳米纤维中作为其运输和储存的可持续方法。
Encapsulation of emulsion droplets and nanoparticles in nanofibers as sustainable approach for their transport and storage.
作者信息
Srikamut Chadapon, Thongchaivetcharat Kusuma, Phakkeeree Treethip, Crespy Daniel
机构信息
Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Rayong 21210, Thailand.
Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Rayong 21210, Thailand.
出版信息
J Colloid Interface Sci. 2020 Oct 1;577:199-206. doi: 10.1016/j.jcis.2020.05.056. Epub 2020 May 22.
HYPOTHESIS
Emulsions are metastable and can be destabilized by coalescence and Ostwald ripening, which lead to phase separation. Immobilizing emulsion droplets in a solid material shall improve their stability during storage.
EXPERIMENTS
Miniemulsions and dispersions of nanocapsules are electrospun to immobilize colloids in polymer nanofibers. The nanofibers are dissolved after various period of time to re-disperse nanodroplets and nanocapsules.
FINDINGS
The size of nanodroplets and nanocapsules are close to the size of the original colloids before electrospinning, meaning that the emulsion droplets are efficiently stored overtime in nanofibers. Entrapping droplets in nanofibers by electrospinning allows a reduction of weight and volume of the emulsion of up to 82%. This method is therefore beneficial for improving shelf-life of emulsions, decreasing storage volume, and decreasing energy consumption for transportation of emulsions.
假设
乳液是亚稳态的，会因聚结和奥斯特瓦尔德熟化而失稳，从而导致相分离。将乳液滴固定在固体材料中应能提高其储存稳定性。
实验
将纳米胶囊的细乳液和分散体进行静电纺丝，以将胶体固定在聚合物纳米纤维中。在不同时间段后将纳米纤维溶解，以重新分散纳米滴和纳米胶囊。
发现
纳米滴和纳米胶囊的尺寸接近静电纺丝前原始胶体的尺寸，这意味着乳液滴在纳米纤维中能长时间有效储存。通过静电纺丝将液滴包裹在纳米纤维中可使乳液的重量和体积减少高达82%。因此，该方法有利于提高乳液的保质期、减小储存体积并降低乳液运输的能耗。
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