Yashchenko O. Resource-saving technology for nanocellulose production from non-wood plant raw materials

The dissertation work is devoted to the development of resource - saving technology for obtaining cellulose, nanocellulose and composite materials based on it from domestic non - wood vegetable raw materials. Ecologically safe organ-solvent methods for delignification of wheat straw and miscanthus stalks, flax and kenaf fibers have been developed. The influence of the main technological parameters of the process of hydrolysis of organosolvent cellulose on the quality indicators of nanocellulose has been studied. Experimental statistical models of hydrolysis processes were obtained. The effective values ​​of the parameters of the hydrolysis process are established. The technological process of hydrolysis of organosolvent cellulose from non-woody vegetable raw materials has been improved by reducing the consumption of sulfuric acid and neutralizing the nanocellulose suspension by electrodialysis. The possibility of using nanocellulose as a strengthening additive to improve the physical and mechanical properties of different types of paper and cardboard, the use of nanocellulose in cement mortar, which reduced the normal density of cement paste, reduce the start and end time of cement hardening, increase compressive strength of cement samples. Technological instructions for obtaining organosolvent cellulose suitable for chemical processing, in particular for the production of nanocellulose, have been developed. The technological instruction on receiving nanocellulose is developed. The expediency of introducing nanocellulose into the cement mixture was confirmed by the act of implementation at one of the enterprises of the cement industry. The results of the work are introduced into the educational process of the Department of Ecology and Technology of Plant Polymers.