THE QUALITY OF PAPER AND CARDBOARD DEPENDS ON THE METHODS OF STABILIZATION OF DISPERSED PHASE PARTICLES IN THE DEVELOPED NEUTRAL AND HIGHLY RESIN MODIFIED ROSIN PRODUCTS

UDC 676.2.014.44

 

Dashkevich Svetlana Arkad’yevna – Master’s degree student, the Department of Chemical Processing of Wood. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: dashkevich@belstu.by

Gordeyko Svetlana Aleksandrovna ‒ PhD (Engineering), Associate Professor, Assistant Professor, the Department of Сhemical Processing of Wood. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: sveta_gordeiko@mail.ru

Chernaya Natal’ya Viktorovna – DSc (Engineering), Professor, Professor, the Department of Chemical Processing of Wood. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: chornaya@belstu.by

Shashok Zhanna Stanislavovna – DSc (Engineering), Professor, Professor, the Department of Polymer Composite Materials. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: shashok@belstu.by

Nikulin Sergey Savvovich – Corresponding Member of the RAE, DSc (Engineering), Professor, Professor, the Department of Technology of Organic Compounds, Polymer Processing and Techno-sphere Safety. Voronezh State University of Engineering Technologies (19, Revolyutsii Ave., 394036, Voronezh, Russian Federation). E-mail: Nikylin_sergey48@mail.ru

 

DOI: https://doi.org/ 10.52065/2520-2669-2024-283-16.

Key words: resin acids, esterification, monoester, modification, neutralization, stabilization.

For citation: Dashkevich S. A., Gordeyko S. A., Chernaya N. V., Shashok Zh. S., Nikulin S. S. The quality of paper and cardboard depends on the methods of stabilization of dispersed phase particles in the developed neutral and highly resin modified rosin products. Proceedings of BSTU, issue 2, Chemical Engineering, Biotechnologies, Geoecology, 2024, no. 2 (283), pp. 136–149 (In Russian). DOI: 10.52065/2520-2669-2024-283-16.

Abstract

Methods of stabilization of dispersed phase particles present in new types of modified resin acids (neutral and highly resin), which differ from the known neutral analogues of TM and LM, have been studied in that instead of monoethylcellose maleinate and oleic anhydride, a new compound was used – monoester of maleic anhydride and higher fatty acids of the C10–C18 fraction. The stabilizing effect of substances of various natures has been studied and a decreasing sequence has been established for the effectiveness of their use: ammonium caseinate > surfactant > latex dispersion > modified starch. The content of each substance was changed from 1 to 19 wt. %. It has been established that the nature and content of the stabilizing substance affects the aggregate stability, as well as the hydrophobicity and strength of paper and cardboard. The presence of a stabilizing substance in the particle structure of the dispersed phase (especially 16–19 wt. % ammonium caseinate or 1–3 wt. % surfactants) contributed to an increase in the aggregate stability of rosin emulsions by 3–5 times and improved the physico-chemical (by 15–20%) and hydrophobic (by 20–30%) properties of rosin products. Their use made it possible to shift the process of sizing fibrous suspensions (cellulose and waste paper) from the existing homocoagulation regime to a more effective heteroadagulation regime. This contributed to a decrease (by 2 times or more) in the content of rosin emulsions and electrolyte in paper masses, while simultaneously improving the quality (hydrophobicity and strength) of paper and cardboard by 4–16%.

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26.04.2024