Towards a feasible and scalable production of bio-xerogels - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Colloid and Interface Science Année : 2015

Towards a feasible and scalable production of bio-xerogels

Andrzej Szczurek
  • Fonction : Auteur
  • PersonId : 777525
  • IdRef : 159044855
Vanessa Fierro
Alain Celzard

Résumé

Hypothesis: The synthesis process of carbon xerogels is limited, mainly due to two drawbacks that prevent their introduction onto the market: (i) the long time required for producing the material and (ii) the reagents used for the synthesis, which are costly and harmful to the environment. Microwave radiation is expected to produce a reduction in time of more than 90%, while the use of tannin instead of resorcinol will probably result in a cost-effective carbonaceous material. Experiments: Resorcinol-tannin-formaldehyde xerogels containing different amounts of tannin, either with or without a surfactant (sodium dodecyl sulphate), were synthesized by means of two different heating methods: conventional and microwave heating. The effects of the surfactant, the heating method and the addition of tannin upon the porous structure and the chemical composition of the final materials were evaluated. Findings: It was found that the addition of surfactant is essential for obtaining highly porous xerogels when using tannins. The heating method also plays an important role, as conventionally synthesized samples display a greater volume of large pores. However, tannins are less sensitive to microwave radiation and their use results in tannin-formaldehyde xerogels that have a porous structure and chemical composition similar to those of resorcinol-formaldehyde xerogels.

Dates et versions

hal-01294581 , version 1 (29-03-2016)

Identifiants

Citer

Natalia Rey-Raap, Andrzej Szczurek, Vanessa Fierro, J. Angel Menendez, Ana Arenillas, et al.. Towards a feasible and scalable production of bio-xerogels. Journal of Colloid and Interface Science, 2015, 456, pp.138-144. ⟨10.1016/j.jcis.2015.06.024⟩. ⟨hal-01294581⟩
32 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More