未变性胶原生物表面活性剂的表面张力及其表面吸附

发布时间：2018-04-03 23:40

  本文选题：未变性胶原　切入点：表面张力　出处：《功能材料》2014年23期

【摘要】：研究了一种未变性胶原生物表面活性剂(CBS)水溶液的表面张力和表面吸附性质。结果表明,CBS水溶液的表面张力随CBS浓度的增大而降低,最终趋于平缓,达到55.92 mN/m。在等电点附近,CBS表面静电荷降低,使其表面张力显著降低。在低温下,CBS溶液的表面活性较好,当温度继续升高(35℃),由于变性作用,CBS溶液的表面张力急剧增大。CBS水溶液的吸附属于Langmiur型吸附,根据γ-lgC、Γ-C以及C/Γ-C拟合曲线计算得到饱和吸附量相似,分别为1.86×10-10,1.97×10-10和2.03×10-10 mol/cm2。吸附自由能为-3.53kJ/mol,表明其在标准状态下可以自发进行。
[Abstract]:The surface tension and adsorption properties of an undenatured collagen biosurfactant (CBS) aqueous solution were studied.The results show that the surface tension of CBS aqueous solution decreases with the increase of CBS concentration, and finally tends to be flat, reaching 55.92 mn / m.The surface static charge of CBS decreases significantly near the isoelectric point, and the surface tension decreases significantly.The surface activity of CBS solution is better at low temperature. When the temperature continues to rise to 35 鈩，

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