Król Żaneta, Malik Magdalena, Marycz Krzysztof, Jarmoluk Andrzej
Department of Animal Products Technology and Quality Management, Wroclaw University of Environmental and Life Sciences, Chelmonskiego 37/41, 51-630 Wroclaw, Poland.
Faculty of Chemistry, Wroclaw University of Technology, Smoluchowskiego 23, 50-370 Wroclaw, Poland.
Polymers (Basel). 2016 Jul 12;8(7):248. doi: 10.3390/polym8070248.
The objective of this study was to evaluate the changes within the physicochemical properties of gelatine (2%; 4%; 8%), carrageenan (1.5%; 2%; 2.5%) and sodium alginate (0.75%; 1%; 1.25%) hydrogels with different sodium chloride concentrations that were triggered by applying direct current (DC) of 400 mA for a duration of five minutes. There were three types of gels prepared for the purpose of the study: C, control; H, gels on the basis of hydrosols that were treated with DC; and G, gels treated with DC. In the course of the study, the authors carried out the following analyses: Texture Profile Analysis (TPA), Fourier Transform Infrared spectroscopy (FTIR), Scanning Electron Microscopy (SEM) and Swelling Ratio (SR). Furthermore, the color and pH of hydrogels were measured. The FTIR spectra showed that the structures of gelatine, carrageenan and sodium alginate do not significantly change upon applying DC. The results of TPA, SR, color and pH measurement indicate that hydrogels' properties are significantly dependent on the type of polymer, its concentration and the type of the gel. By changing those parameters, the characteristics of such gels can be additionally tuned, which extends their applicability, e.g., in the food industry. Moreover, the analysis revealed that SR of H gel gelatine after 72 h of storage was 1.84-times higher than SR of the control sample, which indicated that this gel may be considered as a possible component for wound dressing materials.
本研究的目的是评估在施加400 mA直流电持续5分钟的情况下，不同氯化钠浓度对明胶（2%；4%；8%）、卡拉胶（1.5%；2%；2.5%）和海藻酸钠（0.75%；1%；1.25%）水凝胶物理化学性质的影响。为该研究制备了三种类型的凝胶：C，对照；H，基于经直流电处理的水溶胶的凝胶；G，经直流电处理的凝胶。在研究过程中，作者进行了以下分析：质地剖面分析（TPA）、傅里叶变换红外光谱（FTIR）、扫描电子显微镜（SEM）和溶胀率（SR）。此外，还测量了水凝胶的颜色和pH值。FTIR光谱表明，施加直流电后，明胶、卡拉胶和海藻酸钠的结构没有显著变化。TPA、SR、颜色和pH值测量结果表明，水凝胶的性质显著取决于聚合物的类型、其浓度和凝胶的类型。通过改变这些参数，可以进一步调整此类凝胶的特性，从而扩展其适用性，例如在食品工业中的适用性。此外，分析表明，储存72小时后，H型明胶凝胶的SR比对照样品高1.84倍，这表明这种凝胶可被视为伤口敷料材料的一种可能成分。
