Development of an adhesive composition based on sodium silicate for the production of wood-fiber thermal insulation boards

The present paper contains researches on the development of an adhesive based on sodium silicate for the production of wood-fiber thermal insulation boards. It presents the results of experimental researches aimed at the improvement of water-resisting properties of sodium silicate in order to ensure required physical and mechanical characteristics of thermal insulation boards based on it when being used in adverse temperature and humidity conditions.

For this purpose, a modifier – sodium fluosilicate capable of forming strong insoluble compounds when interacting with silicate – has been used. It has been found that introduction of sodium fluosilicate makes it possible to significantly increase the share of insoluble residue six-fold, thus, creating opportunities for the production of boards with high performance properties. For the purpose of study of interaction between the developed adhesive composition and wood fiber, samples of thermal insulation board have been produced and a factorial experiment has been realized to obtain the dependencies of physical and mechanical parameters. The output values are: compressive strength for 10 % linear deformation and water absorption. It has been found that the optimum quantity of sodium fluosilicate in the adhesive composition amounts to 7.5 %. It provides for the highest compressive strength for 10 % linear deformation and decreases water absorption of the boards by 30 %.

The results obtained prove the possibility of wood fiber gluing using adhesive compositions based on sodium silicate. In order to achieve required characteristics, the adhesive shall be modified.

1. Kutugin V. A., Lotov V. A. Teploizolyatsionnyye materialy na osnove zhidkogo stekla // Khimiya, khimicheskaya tekhnologiya i biotekhnologiya na rubezhe tysyacheletiy : materialy IV Mezhdunar. nauch. konf. Tomsk, 2006. S. 76–77.

2. Grigor’yev P. N., Matveyev M. A. Rastvorimoye steklo (polucheniye, svoystva i primeneniye). M. : Gos. izd. literatury po stroitel’nym materialam, 1956. 444 s.

3. Davydenko N. V., Bakatovich A. A. Povysheniye vodostoykosti zhidkogo stekla, primenyayemogo v kachestve vyazhushchego pri proizvodstve teploizolyat sionnykh kostrosolomennykh plit // Vestnik polotskogo gosudarstvennogo universiteta. 2015. № 8. S. 71–75.

4. Osobennosti polucheniya shchelochno-silikatnykh teploizolyatsionnykh materialov / S. N. Leonovich, G. L. Shchukin, A. L. Belanovich, V. P. Savenko, S. A. Kar pushenkov // Nauka i tekhnika. 2012. № 6. S. 45–50.

5. Matveyev M. A., Kuritsyna Yu. S. Zavisimost’ prochnosti kislotoupornykh zamazok, rastvorov i betonov ot prirody i kremnezemistogo modulya shchelochnykh silikatov // Zhurnal VKhO im. Mendeleyeva. 1964. T. 9. № 6. S. 699.

6. Figovskiy O. L., Kudryavtsev P. G. Zhidkoye steklo i vodnyye rastvory silikatov, kak perspektivnaya osnova tekhnologicheskikh protsessov polucheniya novykh kompozitsionnykh materialov // Inzhenernyy vestnik Dona. 2014. № 2. 42 s.

7. Lisovskiy V. V. O vliyanii nekotorykh tekhno logicheskikh parametrov prigotovleniya zhidkoste kol’nykh tsellyulozosoderzhashchikh kompozitsiy na vodostoykost’ // Plasticheskiye massy. 1997. № 4. S. 23 25.

8. Dubovskaya L. Yu., Ignatovich L. V. Vliyaniye vzaimodeystviya geksaftorosilikata natriya i zhidkogo stekla na prochnost’ drevesnykh kompozitsionnykh materialov // Trudy BGTU. 2008. № 2. S. 240–242.

9. Zhbankov R. G. Infrakrasnyye spektry tsellyulozy i eye proizvodnykh. Minsk, 1964. 338 s.

10. Oblivin A. N., Lopatnikov M. V., Tarasov S. M. Drevesnyye kompozitsionnyye materialy na neorga nicheskom svyazuyushchem // Lesnoy vestnik. 2016. № 4. S. 64–68.

11. Korneyev V. I., Danilov V. V. Zhidkoye i rastvo rimoye steklo. SPb. : Stroyizdat, SPb., 1996. 214 [2] s. : il.; 22 sm.

12. Fizicheskiye metody ispytaniy drevesiny / A. N. Chu binskiy, A. A. Tambi, G. S. Varankina, A. A. Fedyayev, M. A. Chubinskiy, V. L. Shvets, K. V. Chauzov. SPb. : SPbGLTU, 2015. 125 s.

13. Volynskiy V. N. Tekhnologiya kleyenykh mate- rialov : ucheb. posobiye dlya vuzov. 2-e izd., ispr. i dop. Arkhangel’sk : Izd-vo Arkhang. gos. tekhn. un-ta, 2003. 280 s.

14. Basin V. E. Adgezionnaya prochnost’. M. : Khi miya, 1981. 208 s

15. GOST 13078–81. Steklo natriyevoye zhidkoye. Tekhnicheskiye usloviya.

16. GOST EN 1609–2011 Izdeliya teploizolya tsionnyye, primenyayemyye v stroitel’stve. Metod opre deleniya vodopogloshcheniya pri kratkovremennom chastichnom pogruzhenii.

17. GOST EN 826–2011. Izdeliya teploizolya tsionnyye, primenyayemyye v stroitel’stve. Metody opredeleniya kharakteristik szhatiya.

18. Pen P. Z. Statisticheskiye metody modelirovaniya i optimizatsii protsessov tsellyulozno-bumazhnogo proizvodstva. Krasnoyarsk, 1982. 192 s.

19. Pizhurin A. A., Rozenblit M. S. Osnovy modeli rovaniya i optimizatsii protsessov derevoobrabotki. M. : Lesn. prom-st’, 1988. 295 s.

20. Lisovskiy V. V. O vliyanii nekotorykh tekhno logicheskikh parametrov prigotovleniya zhidkoste kol’nykh tsellyulozosoderzhashchikh kompozitsiy na vodostoykost’ // Plasticheskiye massy. 1997. № 4. S. 23–25.

21. Otlev I. A., Shteynberg Ts. B. Tekhnologicheskiye raschety v proizvodstve drevesno-struzhechnykh plit. SPb. : Lesn. prom-st’, 1979. 143 s.

22. Matveyev M. A., Kuritsyna Yu. S. Zavisimost’ prochnosti kislotoupornykh zamazok, rastvorov i betonov ot prirody i kremnezemistogo modulya shchelochnykh silikatov // Zhurnal VKhO im. Mendeleyeva. 1964. T. 9, № 6. S. 699.