Effects of freeze-drying conditions on aerogel properties
Source abstract
Abstract
Carbon nanofiber-reinforced polymer aerogels have been successfully synthesized by means of a freeze-drying process. The influence of the different operation conditions on both the process efficiency and the aerogel physical properties has been evaluated. Morphology, porosity and conductivity of the resulting carbon nanofiber-reinforced polymer aerogels were investigated. Their density and porosity increased when the freezing time decreased. However, the porosity of the carbon nanofiber-reinforced polymer aerogels increased and when both the vacuum pressure and the freeze-drying temperature increased, respectively. No clear effect of the operating conditions on the thermal conductivity of the aerogels synthesized was detected, ranging from 0.037 to 0.069 W/m K. The low values of thermal conductivity obtained suggest that these materials could be used for building insulation purposes. In addition, the addition of carbon nanofibers allowed to increase the mechanical resistance of the final product to be used as building insulation materials to reduce the energy consumption.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Aerogels and thermal insulation · Surface Modification and Superhydrophobicity · Advanced Cellulose Research Studies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (30)
Show source-provided references
1. Pääkkö M, Vapaavuori J, Silvennoinen R, Kosonen H, Ankerfors M, Lindström T, Berglund LA, Ikkala O (2008) Long and entangled native cellulose I nanofibers allow flexible aerogels and hierarchically porous templates for functionalities. Soft Matter 4:2492–249910.1039/b810371b ↗
2. Olsson RT, Azizi Samir MAS, Salazar-Alvarez G, Belova L, Ström V, Berglund LA, Ikkala O, Nogués J, Gedde UW (2010) Making flexible magnetic aerogels and stiff magnetic nanopaper using cellulose nanofibrils as templates. Nat Nanotechnol 5:584–58810.1038/nnano.2010.155 ↗
3. Qi H, Mäder E, Liu J (2013) Electrically conductive aerogels composed of cellulose and carbon nanotubes. J Mater Chem A 1:9714–972010.1039/c3ta11734k ↗
4. Pekala RW, Alviso CT, Lu X, Gross J, Fricke J (1995) New organic aerogels based upon a phenolic-furfural reaction. J Non-Cryst Solids 188:34–4010.1016/0022-3093(95)00027-5 ↗
5. Yang S, Taha-Tijerina J, Serrato-Diaz V, Hernandez K, Lozano K (2007) Dynamic mechanical and thermal analysis of aligned vapor grown carbon nanofiber reinforced polyethylene. Compos B-Eng 38:228–23510.1016/j.compositesb.2006.04.003 ↗
6. Al-Saleh MH, Sundararaj U (2009) A review of vapor grown carbon nanofiber/polymer conductive composites. Carbon 47:2–2210.1016/j.carbon.2008.09.039 ↗
7. Poveda RL, Achar S, Gupta N (2014) Viscoelastic properties of carbon nanofiber reinforced multiscale syntactic foam. Compos B-Eng 58:208–21610.1016/j.compositesb.2013.10.079 ↗
8. Zhang L, Aboagye A, Kelkar A, Lai C, Fong H (2014) A review: carbon nanofibers from electro spun polyacrylonitrile and their applications. J Mater Sci 49:463–48010.1007/s10853-013-7705-y ↗
9. Ghaleb ZA, Mariatti M, Ariff ZM (2014) Properties of graphene nanopowder and multi-walled carbon nanotube-filled epoxy thin-film nanocomposites for electronic applications: the effect of sonication time and filler loading. Compos A-Appl 58:77–8310.1016/j.compositesa.2013.12.002 ↗
10. Klemm D, Kramer F, Moritz S, Lindström T, Ankerfors M, Gray D, Dorris A (2011) Nanocelluloses: a new family of nature-based materials. Angew Chem Int Ed 50:5438–546610.1002/anie.201001273 ↗
11. Moon RJ, Martini A, Nairn J, Simonsen J, Youngblood J (2011) Cellulose nanomaterials review: structure, properties and nanocomposites. Chem Soc Rev 40:3941–399410.1039/c0cs00108b ↗
12. Neubauer E, Kitzmantel M, Hulman M, Angerer P (2010) Potential and challenges of metal–matrix-composites reinforced with carbon nanofibers and carbon nanotubes. Compos Sci Technol 70:2228–223610.1016/j.compscitech.2010.09.003 ↗
13. Wu Z, Li C, Liang H, Chen J, Yu S (2013) Ultralight, flexible, and fire-resistant carbon nanofiber aerogels from bacterial cellulose. Angew Chem Int Ed 52:2925–292910.1002/anie.201209676 ↗
14. Sánchez-Silva L, Víctor-Román S, Romero A, Gracia I, Valverde JL (2014) Tailor-made aerogels based on carbon nanofibers by freeze-drying. Sci Adv Mater 6:665–67310.1166/sam.2014.1754 ↗
15. Víctor-Román S, Simón-Herrero C, Romero A, Gracia I, Valverde JL, Sánchez-Silva L (2015) CNF-reinforced polymer aerogels: influence of the synthesis variables and economic evaluation. Chem Eng J 262:691–70110.1016/j.cej.2014.10.026 ↗
16. Jiménez V, Nieto-Márquez A, Díaz JA, Romero R, Sánchez P, Valverde JL, Romero A (2009) Pilot plant scale study of the influence of the operating conditions in the production of carbon nanofibers. Ind Eng Chem Res 48:8407–841710.1021/ie9005386 ↗
17. Luis M, Carballo S, Hugo M, Galindo V (2001) Estudios de los Procesos sol-gel para la Obtención de un Aglutinante Apropiado para el Paletizado de Alúmina. Ing Investig 48:57–63
18. Ratti C (2012) Freeze-drying process design. In: Ahmed J, ShafiurRahman M (eds) Handbook of food process design. Wiley-Blackwell, Oxford, pp 621–64710.1002/9781444398274.ch22 ↗
19. Hammami C, René F (1997) Determination of freeze—drying process variables for strawberries. J Food Eng 32:133–15410.1016/S0260-8774(97)00023-X ↗
20. Wang Y, Gawryla MD, Schiraldi DA (2013) Effects of freezing conditions on the morphology and mechanical properties of clay and polymer/clay aerogels. J Appl Polym Sci 129:1637–164110.1002/app.39143 ↗
21. Kramer T, Kremer DM, Pikal MJ, Petre WJ, Shalaev EY, Gatlin LA (2009) A procedure to optimize scale-up for the primary drying phase of lyophilization. J Pharm Sci 98:307–31810.1002/jps.21430 ↗
22. Zhai S, Su H, Taylor R, Slater NKH (2005) Pure ice sublimation within vials in a laboratory lyophiliser; comparison of theory with experiment. Chem Eng Sci 60:1167–117610.1016/j.ces.2004.09.078 ↗
23. Patapoff TW, Overcashier DE (2002) The importance of freezing on lyophilization cycle development. Biopharm 3:16–21
24. Searles JA, Carpenter JF, Randolph TW (2001) the ice nucleation temperature determines the primary drying rate of lyophilization for samples frozen on a temperature-controlled shelf. J Pharm Sci 90:860–87110.1002/jps.1039 ↗
25. Skaltsas T, Avgouropoulos G, Tasis D (2011) Impact of the fabrication method on the physicochemical properties of carbon nanotube-based aerogels. Microporous Mesoporous Mater 143:451–45710.1016/j.micromeso.2011.03.038 ↗
26. Chen HB, Liu B, Huang W, Wang JS, Zeng G, Wu WH, Schiraldi DA (2014) Fabrication and properties of irradiation-cross-linked poly (vinyl alcohol)/clay aerogel composites. ACS Appl Mater Interfaces 61:16227–1623610.1021/am504418w ↗
27. Lewicki JP, Worsley MA, Albo RLF, Finnie JA, Ashmore M, Mason HE, Baumann TF, Maxwell RS (2014) The effects of highly structured low density carbon nanotube networks on the thermal degradation behaviour of polysiloxanes. Polym Degrad Stab 102:25–3210.1016/j.polymdegradstab.2014.02.013 ↗
28. Koebel M, Rigacci A, Achard P (2012) Aerogel-based thermal superinsulation: an overview. J Sol-Gel Sci Technol 63:315–33910.1007/s10971-012-2792-9 ↗
29. Tsinontides SC, Rajniak P, Pham D, Hunke WA, Placek J, Reynolds SD (2004) Freeze drying principles and practice for successful scale-up to manufacturing. Int J Pharm 280:1–1610.1016/j.ijpharm.2004.04.018 ↗
30. Tang XC, Pikal MJ (2004) Design of freeze—drying processes for pharmaceuticals: practical advice. Pharm Res 21:191–20010.1023/B:PHAM.0000016234.73023.75 ↗