不同来源纤维素纳米晶体稳定的角黄素 Pickering 乳液的比较。
A comparison of Canthaxanthine Pickering emulsions, stabilized with cellulose nanocrystals of different origins.
机构信息
Department of Food Science and Engineering, University College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran.
Department of Food Science and Engineering, University College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran; Center of Excellence for Application of Modern Technologies for Producing Functional Foods and Drinks (FFDCE) and Bioprocess Engineering Laboratory (BPEL), University College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran.
出版信息
Int J Biol Macromol. 2018 Jan;106:489-497. doi: 10.1016/j.ijbiomac.2017.08.030. Epub 2017 Aug 10.
Cellulosic nanocrystals from different origins were made to stabilize the canthaxanthin (CTX) in pickering emulsion. Nanocrystals were obtained by hydrochloric acid hydrolysis. Dynamic light scattering (DLS) demonstrated that the length of solid particles were in the range of 112nm-4000nm. AFM indicated the needle-like shape of the cotton cellulose nanocrystals (CCNs) and bacterial cellulose nanocrystals (BCNs) and also illustrated the thickness of the particles to be 6 and 7nm respectively. The crystallinity of both BCNs and CCNs was higher than the cellulose source they were isolated (CL: 75.4%, CCNs: 86.6; BC: 79.2%, BCNs: 88.5%). Effects of different factors such as temperature, pH and ionic concentration on stability were investigated. The results revealed that an increase in both temperature and pH was accompanied by an improvement in emulsion stability in all tested samples. However, increase in ionic concentration resulted in emulsions with less stability. In all the samples, CCN emulsions had better stability than the BCN emulsions, which was associated to smaller particle size and more coverage ability. Test of stability to light showed that CCN emulsions can preserve CTX better than BCN against the light.
不同来源的纤维素纳米晶被用于稳定角黄素（CTX）在Pickering 乳液中。纳米晶通过盐酸水解获得。动态光散射（DLS）表明固体颗粒的长度在 112nm-4000nm 范围内。原子力显微镜（AFM）表明棉纤维素纳米晶（CCN）和细菌纤维素纳米晶（BCN）呈针状，并且还说明了颗粒的厚度分别为 6nm 和 7nm。BCN 和 CCN 的结晶度均高于其分离的纤维素源（CL：75.4%，CCN：86.6；BC：79.2%，BCN：88.5%）。研究了不同因素（如温度、pH 值和离子浓度）对稳定性的影响。结果表明，所有测试样品的温度和 pH 值升高均伴随着乳液稳定性的提高。然而，离子浓度的增加会导致乳液稳定性降低。在所有样品中，CCN 乳液的稳定性均优于 BCN 乳液，这与较小的粒径和更大的覆盖能力有关。对光稳定性的测试表明，CCN 乳液比 BCN 乳液更能保护 CTX 免受光的影响。
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