Djabourov M, Lechaire J P, Gaill F
Ecole de Physique et Chimie, CNRS URA 857, Paris, France.
Biorheology. 1993 May-Aug;30(3-4):191-205. doi: 10.3233/bir-1993-303-405.
This paper undertakes a parallel analysis of the gelation mechanisms, structure and rheological properties of gelatin and collagen gels. Although the molecular compositions of collagen and gelatin are almost identical, gelation proceeds from distinct mechanisms and leads to different types of molecular assemblies. First are presented the properties of the solutions, based on their structural and rheological characterization; then the mechanisms of gelation in the networks, observed by Transmission Electron Microscopy, of three types of gels: gelatin gels, Type I collagen gels and gels made of cuticle collagen extracted from annelid worms. The rheological investigation of the sol-gel transition of gelatin is described within the context of the theories of percolation and scaling laws. Different experimental approaches to the kinetics of gelation are presented, combining dynamic light scattering and rheology in respect to gelatin gels.
本文对明胶和胶原蛋白凝胶的凝胶化机制、结构及流变特性进行了平行分析。尽管胶原蛋白和明胶的分子组成几乎相同，但凝胶化过程源于不同的机制，并导致不同类型的分子组装。首先基于溶液的结构和流变特性介绍其性质；然后通过透射电子显微镜观察三种类型凝胶（明胶凝胶、I型胶原蛋白凝胶以及从环节动物提取的表皮胶原蛋白制成的凝胶）网络中的凝胶化机制。在渗流理论和标度律的背景下描述了明胶溶胶-凝胶转变的流变学研究。针对明胶凝胶，介绍了结合动态光散射和流变学的不同凝胶化动力学实验方法。
