高分子果胶与改性果胶的吸湿保湿性能比较研究

Moisture Adsorption and Retention Capacity of Macromolecule Pectin and Modified Pectin

为了比较研究改性果胶与高分子果胶的吸湿保湿性能，实验利用果胶酶对果胶进行酶解，以骨胶原和甘油为对照，对高分子果胶和改性果胶在26℃，相对湿度分别为20％、43％和81％的条件下的吸湿和保湿性能进行测定。结果表明：在实验湿度环境下，果胶和改性果胶的吸湿性能和骨胶原蛋白相近，但比甘油要差，而保湿性能优于骨胶原蛋白和甘油，果胶的保湿性能优于改性果胶，其吸湿性能可能和分子量与酯化度有关。实验结果表明高分子果胶有较好的保湿效果，是一种良好的保湿化妆品原材料。

In order to research the moisture adsorption and retention capacity of macromolecule pectin and modified pectin,the moisture adsorption and retention capacity of macromolecule pectin and modified pectin were determined under the conditions of 26 ℃ ,rehtive humidifies of 20% ,43% and 81% ,the control sample were bone collagen and glycerin. The results showed that the macromolecule pectin and modified pectin exhibited proximal performance in moisture adsorption test as the bone collagen did, but worse than glycerin. The rentenfion capacity of macromolecule pectin and mod- ified pectin were superior to bone collagen and glycerin. It is safe to draw the conclusion that macromolecttle pectin would be a better moisturizing component than modifiedpecfin. The moisture adsorption and retention capacity of pectin maybe has relationship with its molecular weight and esterifiable degree.