Enhancing Water Absorption in Cellulosic Composites through Hydrophilization

The growing consumption of disposable sanitary products (diapers, diapers, sheets, pads) requires the development of science and the production of cellulose materials for their manufacture. Water absorption is one of the most important indicators for sanitary products. The theoretical concepts of the origin, development and management of cellulose hydrophilicity are considered. The mechanisms of water absorption are briefly considered, the main ones are identified - wetting and capillarity. The calculation of the specific water absorption of a cellulose composite made of bleached sulfate cellulose from coniferous wood according to GOST 9571-89 of Arkhangelsk Pulp and Paper Mill JSC was made. It is shown that the water absorption of the cellulose under study is relatively much lower than imported samples, therefore, research in the field of increasing the hydrophilicity of cellulose has high potential and practical significance. The main factors of increasing water absorption are considered - an increase in the hydrophilicity of cellulose due to grinding and the use of different fibers for formation of a cellulose composite. It is shown that the water absorption index to the required level of imported manufacturers 4-5 g/g can be achieved by regulating technological factors.

1. Akim G.L. et al. Texnologiya cellyulozno-bumazhnogo proizvodstva. Spravochny'e materialy'. V 3 t. Vol. 1. Sy'r'e i proizvodstvo polufabrikatov. Ch.2. Proizvodstvo polufabrikatov. SPb.: Politexnika, 2003. 633 p. (In Russ.)

2. Dubovy'j V.K. et al. Laboratorny'j praktikum po texnologii bumagi i kartona: uchebnoe posobie dlya studentov vuzov. SPb.: Izd-vo Politexn. un-ta, 2006. 229 p. (In Russ.)

3. Fengel D., Vegener G. Drevesina (ximiya, ul'trastruktura, reakcii): per. s angl. Predisl. A.A. Leonovich / pod red. d-ra texn. nauk prof. A.A. Leonovicha. M.: Lesn. prom-st', 1988. 512 p. (In Russ.)

4. Gorazdova V.V., Dernova E.V., Dul'kin D.A., Okulova E.O. Vliyanie fibrillirovaniya i ukorocheniya volokon pri razmole na xarakteristiki prochnosti, deformativnosti i treshhinostojkosti cellyulozny'x materialov. IVUZ. Lesnoj zhurnal, 2018, no. 2, pp. 262-265. (In Russ.)

5. Khimiya drevesiny': per. s finskogo R.V. Zavodova; pod red. M.A. Ivanova. M.: Lesn. prom-st', 1982. 400 p. (In Russ.)

6. Lavrent'ev, I.V. Vliyanie poristosti cellyuloznogo materiala na absorbciyu vody' serdcevinny'm sloem odnorazovy'x sanitarno-gigienicheskix izdelij. Aktual'ny'e voprosy' lesnogo xozyajstva: mater. 7 Mezhdunar. molodezhnoj nauchn.-prakt. konf. SPb., 9-10 noyabrya 2023, pp. 31-34. (In Russ.)

7. Osipov P.S. et al. Texnologiya cellyulozno-bumazhnogo proizvodstva. Spravochny'e materialy'. V 3 t. Vol. 1. Ch.1. Sy'r'e i proizvodstvo polufabrikatov. SPb.: LTA, 2002. 420 p. (In Russ.)

8. Pchelin V.A. Gidrofobnoe vzaimodejstvie v dispersny'x sistemax. M.: Znanie, 1976. 64 p. (In Russ.)

9. Puzy'rev S.S. et al. Texnologiya cellyulozno-bumazhnogo proizvodstva. Spravochny'e materialy'. V 3-x t. Vol. 1. Sy'r'e i proizvodstvo polufabrikatov. Ch.3. Proizvodstvo polufabrikatov. SPb.: Politexnika, 2004. 316 p. (In Russ.)

10. Struktura i fiziko-ximicheskie svojstva cellyuloz i nanokompozitov na ix osnove / pod red. L.A. Aleshin, V.A. Gurtova, N.V. Melex. Petrozavodsk: Izd-vo PetrGU, 2014. 240 p. (In Russ.)

11. Summ B.D., Goryunov Yu.V. Fiziko-ximicheskie osnovy' smachivaniya i rastekaniya. M.: Ximiya, 1976. 232 p. (In Russ.)

12. Voyuczkij S.S. Kurs kolloidnoj ximii/ S.S. Voyuczkij. Izd. 2-e, per. dop. M.: Ximiya, 1975. 155 p. (In Russ.)