FEATURES OF THE STRUCTURE AND PROPERTIES OF SIZING COMPLEXES WHEN HYDROPHOBIZING PAPER AND CARDBOARD NEUTRAL AND HIGHLY RESINOUS ROSIN EMULSIONS

UDC 676.2.024.741:676.014.44

  • Chernaya Natalʼya 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

  • Herman Nataliya Aleksandrovna − PhD (Engineering), Senior Lecturer, the Department of Сhemical Processing of Wood. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: natalka_wow@mail.ru

  • Chernysheva Tamara Vladimirovna − Senior Researcher, the Department of Сhemical Processing of Wood. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: chernysheva@belstu.by

  • Dashkevich Svetlana Arkad’yevna − Trainee Junior Researcher, the Department of Сhemical Processing of Wood. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: dashkevich@belstu.by

DOI: https://doi.org/10.52065/2520-2669-2022-259-2-79-93

Key words: coagulates, coagulates, peptized particles, homocoagulation, heteroadagulation.

For citation: Chernaya N. V., Herman N. A., Chernysheva Т. V., Dashkevich S. A. Features of the structure and properties of sizing complexes when hydrophobizing paper and cardboard neutral and highly resinours rosin emulsions. Proceedings of BSTU, issue 2, Chemical Engineering, Biotechnologies, Geoecology, 2022, no. 2 (259), pp. 79–93 (In Russian). DOI: https://doi.org/10.52065/2520-2669-2022-259-2-79-93.

Abstract

The structure (core, adsorption and diffusion layers) and properties (dispersion, electrokinetic potential and hydrophobic ability) of sizing complexes depend on the content of electrolyte in the dispersed system Al2(SO4)3 and ions present Al(H2O)6 3+, Аl(H2O)5(OH)2+, Al(H2O)4(OH)2 + and SO4 2–. Increasing the ratio of rosin emulsion: electrolyte from 1: 0.10 to 1: 3.00 and more leads to processes in six areas. Negatively charged coagulables are formed in region I. In the detected regions II–IV (proposed technology) the coagulation process takes place first (region II − peptizing coagulates are formed), then peptization of coagulates takes place (region III − new sizing complexes are formed in the form of fine positively charged peptized particles); in region IV, the new particles retain their aggregative stability and have high hydrophobic properties. Areas V and VI (existing technology) are characterized by increased electrolyte content, which leads to the resumption of the coagulation process and reduced hydrophobic properties of sizing complexes, as first formed coarse electroneutral coagulates (region V), unable to peptize, and then they continue to aggregate (region VI), forming precipitation. It was found that the replacement of coagulates (existing technology) with peptized particles (proposed technology) allows to shift the process of sizing fibrous suspensions (cellulose and waste paper) from the traditional mode of homocoagulation to a more efficient mode of heteroadagulation. The consequence of this is the improvement of the hydrophobicity of paper and cardboard by 1.9–2.7 times due to the reduction of absorbency with one-sided wetting from 30–40 to 11–21 g/m2.

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References

  1. Flyate D. M. Tekhnologiya bumagi [Paper technology]. Moscow, Lesnaya promyshlennost’ Publ., 1988. 440 p. (In Russian).
  2. Chernaya N. V., Lamotkin A. I. Prokleyka bumagi i kartona v kisloy i neytral’noy sredakh [Sizing paper and cardboard in acidic and neutral media]. Minsk, BGTU Publ., 2003. 345 p. (In Russian).
  3. Chernaya N. V. Teoriya i tekhnologiya kleenykh vidov bumagi i kartona [Theory and technology of glued types of paper and cardboard]. Minsk, BGTU Publ., 2009. 394 p. (In Russian).
  4. Khovansky V. V., Duboviy, V. K. Keizer P. M. Primeneniye khimicheskikh vspomogatel’nykh veshchestv v proizvodstve bumagi i kartona [Use of chemical excipients in the production of paper and cardboard]. St. Petersburg., 2013. 151 p. (In Russian).
  5. Bicu I. Water soluble polymers from Diels-Alder adducts of abietic acid as paper additives. Macromol. Mater. Eng., 2000, no. 280/281, pp. 47–53.
  6. Shabiev R. O., Smolin A. S. Analiz elektrokineticheskikh parametrov bumazhnoy massy [Analysis of electrokinetic parameters of paper mass]. St. Petersburg, SPb GTURP Publ., 2012. 80 p. (In Russian).
  7. Kozhevnikov S. Yu., Koverninsky I. N. Inter-Fiber electrostatic bonds in paper. Khimiya rastitelʼnogo syrʼya [Chemistry of plant raw materials], 2012, no. 3, pp. 197–202 (In Russian).
  8. Chernaya N. V. Conceptual development of the theory and technology of sizing paper and cardboard with hydrodispersions of modified rosin in the mode of heteroadagulation of peptized particles. Polimernyye materialy i tekhnologiya [Polymer materials and technologies], 2015, vol. 1, no. 1, pp. 76–90 (In Russian).
  9. Komarov V. I., Laptev L. N., Koverninskiy I. N., Vinogradova S. G., Glazunov A. I., Bel’skiy A. P., Akim E. L., Nevolin V. F. Tekhnologiya tsellyulozno-bumazhnogo proizvodstva. Tom 2. Proizvodstvo bumagii kartona. Ch. 2. Osnovnyye vidy i svoystva bumagi, kartona, fibry i drevesnykh plit [Technology of pulp and paper production. Vol. 2. Production of paper and cardboard. Part 2. Technology of production and processing of paper and cardboard]. St. Petersburg, Polytekhnika Publ., 2006. 499 p. (In Russian).
  10. Kozhevnikov S. Yu., Koverninsky I. N. Khimiya i tekhnologiya “SKIF” dlya bumagi [Chemistry and technology “SKIF” for paper]. Moscow, MGUL Publ., 2010. 91 p. (In Russian).
  11. G. Kotitschke “Triple star” – The State of the Art and Most Efficient Production Line in the World for Woodfree Papers Cjfted. Voith, 2002. 186 p.
  12. Loretzen & Wetter. Paper Testing and Process Optimization. L & Handbook, 2000. 218 p.
  13. Eklund. Die Vorgange beim unter dem Schaber Glattachaber-Streichen. Wochenblatt für Papierfabrikation, 1978, no. 18, pp. 709–714.
  14. Ostapenko A. A., Moroz V. N., Barbash V. A., Kozhevnikov S. Yu., Dubovyy V. K., Koverninskiy I. N. Improving the quality of paper from waste paper with chemical functional substances. Khimiya rastitelʼnogo syrʼya [Chemistry of plant raw materials], 2012, no. 1, pp. 187–190 (In Russian).
  15. Mishurina O. A., Ershova O. A. Methods of hydrophobization and hardening of composite cellulose materials from secondary raw materials. Mezhdunarodnyy zhurnal prikladnykh i fundamentalʼnykh issledovaniy [International Journal of Applied and Fundamental Research], 2016, no. 10, pp. 363–366 (In Russian).
  16. Shabiev R. O., Smolin A. S., Kozhevnikov Yu. S., Koverninskiy I. N. Paper chemistry: investigation of the hardening and dehydrating additives action. Khimiya rastitelʼnogo syrʼya [Chemistry of plant raw materials], 2014, no. 4, pp. 263–270 (In Russian).
  17. Zholnerovich N. V., Nicolaychik I. V., Chernaya N. V. Influence of urea-formaldehyde oligomer composition on technical properties of paper. Proceedings of BSTU, no. 4: Chemistry, Organic Substances Technology and Biotechnology, 2014, pp. 125–127.
  18. Kopylovich M. N., Radion E. V., Baev A. K. Raspredelenie razlichnyh form alyuminiya (III) i medi (II) v rastvorah i skhema processa geteroyadernogo gidroksokompleksoobrazovaniya. Koordinatsionnaya khimiya [Coordination chemistry], 1995, vol. 21, no. 1, pp. 66−71 (In Russian).
  19. Frolov Y. G. Kurs kolloidnoy khimii (Poverkhnostnyye yavleniya i dispersnyye sistemy) [Course of colloid chemistry (Surface phenomena and dispersed systems)]. Moscow, Khimiya Publ., 1982. 400 p. (In Russian).
  20. Fridrihberg D. K. Kurs kolloidnoy khimii [Course of colloid chemistry]. Leningrad, Khimiya Publ., 1984. 368 p. (In Russian).
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