No abstract
The influence of a chemical modification (hardening) on the behavior of photographic gelatins at an interface has been investigated. It has been established, using the Langmuir monolayer method, that the properties of the surface layers of a modified gelatin change at the water-air interface and the depth of modification influences the surface activity of the gelatin. The surface properties of gelatin gels were investigated by the method of wetting depending on the hardener nature and the gelatin molecular-mass composition. It has been established that the hydrophilicity of gelatin gels increases with increase in the content of α-chains and the surface of gelatin gels is additionally hydrophilized as a result of their modification.Introduction. The main method of chemical modification of gelatins in the production of light-sensitive layers is their hardening, involving chemical reactions between the functional groups of the polypeptide chain and the multifunctional organic and inorganic compounds. The effectiveness of a hardener is determined by the number of cross links formed by it. The larger the number of functional gelatin groups interacting (under identical conditions) with a hardener, the higher its effectiveness [1].An important parameter influencing the properties of photographic materials is the molecular-mass composition of a gelatin [2]. The main components of a gelatin are α-, β-, and γ-polypeptide chains with a molecular mass of 95, 190, and 285 kDa respectively; the last two components mentioned are chemically cross-linked α-chains.Modern light-sensitive materials represent multilayer systems. To obtain these systems, it is necessary to well wet emulsive gelatin layers, because, in this case, a uniform contact between the layers is formed and a high quality of treatment of the upper layer of the material can be attained. In this connection, the aim of the present work was to investigate the change in the surface gelatins in the process of hardening and the influence of the hardening and the molecular-mass composition of gelatins on the surface properties of their gels.For the purpose of formation of light-sensitive materials and control of their properties, it is important to investigate systems exhibiting the properties of gelatins and photographic layers.Objects and Methods of Investigation. We investigated two gelatin samples differing in molecular-mass composition ( Table 1). The molecular-mass composition of the gelatins was determined using a high-efficiency liquid chromatography.In our investigations, we used the formaldehyde hardeners tetrahydroxy methyl urea (LIKI-1) and tetrahydroxy methyl diamide of malonic acid (LIKI-19) and the epoxide hardener triglycidylamine (LIKI-9 or TGA):The surface properties of the materials studied were investigated using model systems: monolayers at the water-air interface and gels. Monolayers were formed and investigated in a round Langmuir tank. The apparatus allowed us to measure the surface tension in the process of changing the area of the film applied o...
No abstract
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.