月桂醛和琥珀酸酐接枝改性天然胶原所得产物的表面活性

以月桂醛与琥珀酸酐接枝改性具有三股螺旋结构的天然胶原,得到了一种保留了天然胶原结构的生物表面活性剂(胶原基生物表面活性剂,简称BCB)。研究了BCB的基本表面活性,结果表明,BCB具有较好的泡沫膨胀和泡沫稳定性,其乳化活性(284.08 m2/g)与天然胶原(32.23 m2/g)相比有显著的提高,乳化稳定性和吸油能力也有所提升。BCB的润湿能力随着其浓度的增加而提高,表面张力随存放时间的延长而降低,在质量浓度为5.0×10-3g/L时,表面张力在3 000 s时达到平衡,为52.58 m N/m。研究表明,BCB和天然胶原的乳液类型均为O/W型。

Surface Activity of the Product from Native Collagen Graft Modified by Lauric Aldehyde and Succinic Anhydride

The native collagen with triple helix structure was modified by lauric aldehyde and succinic anhydride, and the biosurfactant retaining native collagen structure was prepared (BCB). The basic surface activity of BCB was investigated and the results showed that the emulsion types of BCB and native collagen were o / w. Compared with native collagen, BCB exhibited better surface activity such as the foam expansion, foam stability, oil absorption capacity, emulsion activity and emulsion stability, but presented lower water absorption capacity. Moreover, the surface tension of BCB decreased with the increased storage time. The wetting power increased with increasing the concentration of BCB.