Direct method of paper surface quality inspection with the addition of secondary raw materials

Аннотация

Information on the material surface characteristics which is “roughness” parameter, determines strength, durability, chemical resistance, color rendering, presence, etc. Here, we investigated the paper roughness on the basis of cotton cellulose with the addition of cellulose pulp from the inner layer of mulberry branches bark by means of atomic force microscopy (AFM). Solver HV atomic force microscope working in semi-contact mode provided the correct image of the surface geometry at 3D scale. Processing of obtained results using the special embedded software allowed calculating Ra parameter. Topographical representation of the surface geometry shows that paper with the addition of cellulose pulp from the inner layer of mulberry branches bark has sufficiently homogenous structure where there are small deepenings. Smaller roughness values are observed for paper with addition of 20-30% of secondary raw materials (Ra=61,89; 77,09 nm). In conclusion, we can say that the method of direct analysis of the paper surface can be used as a method of operational control of surface relief and surface treatment processes of materials. The advantages of this method include a short analysis time, sample conditioning is not required and the equipment of Russian origin is used.