CAJ | 학술논문

采用表面张力和稳态荧光光谱法考察了具有不同疏水结构的2种苄泽类非离子型表面活性剂Brij58和 Brij78与明胶之间的相互作用.结果表明,苄泽类非离子型表面活性剂与明胶之间相互作用的驱动力为疏水作用力,且两者之间的相互作用受到其疏水基团的影响,Brij78在明胶溶液中的临界聚集浓度低于 Brij58体系,表明疏水链更长的 Brij78与明胶之间的相互作用更强.明胶分子的内源荧光光谱强度受苄泽类非离子型表面活性剂的影响,但最大吸收峰位置未发生蓝移,Brij78/明胶体系的内源荧光强度高于 Brij58/明胶体系;此外,表面活性剂浓度较低时,明胶的加入使溶液中疏水微区极性明显降低,且明胶浓度越大降低程度越大.
채용표면장력화은태형광광보법고찰료구유불동소수결구적2충변택류비리자형표면활성제Brij58화 Brij78여명효지간적상호작용.결과표명,변택류비리자형표면활성제여명효지간상호작용적구동력위소수작용력,차량자지간적상호작용수도기소수기단적영향,Brij78재명효용액중적림계취집농도저우 Brij58체계,표명소수련경장적 Brij78여명효지간적상호작용경강.명효분자적내원형광광보강도수변택류비리자형표면활성제적영향,단최대흡수봉위치미발생람이,Brij78/명효체계적내원형광강도고우 Brij58/명효체계;차외,표면활성제농도교저시,명효적가입사용액중소수미구겁성명현강저,차명효농도월대강저정도월대.
The interactions between two nonionic surfactants Brij58, Brij78 with different hydrophobic structures and gelatin were studied by surface tension and steady-state fluorescence spectrometry techniques. The results showed that the interactions were mainly drived by the hydrophobic interactions between Brij nonionic surfactants and gelatin, and the interaction intensity was influenced by the hydrophobic groups of used surfactant. The critical aggregation concentration of Brij78 in the gelatin solution was lower than that of Brij58 itself, which indicated that the interaction between Brij78 and gelatin was stronger because of Brij78’s longer hydrophobic chain. Fluorescent studies showed that the endogenous fluorescent intensity of gelatin was influenced by surfactants and Brij78/gelatin was higher than that of Brij58/gelatin, but the blue-shift of maximum absorption peak was not observed. In addition, at lower surfactant concentration, the polarity of surfactant hydrophobic micro-domain decreased with the addition of gelatin, and it was more obvious when increasing the gelatin concentration.