Study of the effect of cotton pulp milling on the properties of cellulose composite material for collecting and preserving samples of biological material
https://doi.org/10.21266/2079-4304.2022.238.215-227
Abstract
The paper deals with issues related to the CСM technology for the collection and storage of biological substances, these technologies and their manufacturers. Studies of the properties of samples of CСM from different manufacturers have shown that the cotton fiber of which they are composed has low indicators of the weighted average length (1.0–1.2 mm) at the beating degree of 18–20 oSR. Studies of samples of FTA cards for absorbency have shown that the samples have a high rate of absorption of a drop of water on the surface (on average 0.5 sec.) and not high capillary absorbency (6.5 cm), which is necessary for the effective operation of the material for collecting and storing samples of biological substances. Investigation of the physical-mechanical properties of imported samples of cards for the collection and storage of biological materials have shown that the cards have not high indicators of breaking length (1.3–1.5 km) and bursting strength (74–100 kPa), which simplifies the procedure for extracting a biological sample by punching. Investigation of the influence of the technological parameters process of refining (mass concentration, refining time) on the properties of CCM made it possible to determine the optimal modes of refining cotton cellulose, providing quality indicators similar to the properties of imported samples of FTA cards. It is shown that in order to achieve morphological parameters of fiber and properties of CCM similar to those of imported samples of FTA-cards, the refining of cotton pulp in a roll must be carried out at a mass concentration of 3 to 4 g / l with a pressure on the lever and a beating degree of 16–18 °SR.
About the Authors
V. N. Seleznev
St. Petersburg State University of Industrial Technologies and Design
Russian Federation
Russian Federation
SELEZNEV Vladimir N. – PhD student, candidate of the degree of Candidate of Technical Sciences of Higher School of Technology and Energy
198095. Ivana Chernykh str. 4. St. Petersburg
L. G. Makhotina
St. Petersburg State University of Industrial Technologies and Design
Russian Federation
Russian Federation
MAKHOTINA Ludmila G. – DSc (Technical), Professor at Cellulose and Composites Technology department, Higher School of Technology and Energy
198095. Ivana Chernykh str. 4. St. Petersburg
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Review
For citations:
Seleznev V.N., Makhotina L.G. Study of the effect of cotton pulp milling on the properties of cellulose composite material for collecting and preserving samples of biological material. Izvestia Sankt-Peterburgskoj lesotehniceskoj akademii. 2022;(238):215-227. (In Russ.) https://doi.org/10.21266/2079-4304.2022.238.215-227
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