RT Journal Article
T1 Silylation of wheat straw cellulose pulp for its valorization as rheology modifier of industrial hydrophobic fluids: Cases of castor oil and bitumen
A1 Trejo Cáceres, Manuel
A1 Martín Alfonso, José Enrique
A1 Franco Gómez, José María
AB This work explores an innovative approach to developing novel oleo- and bitumen-based dispersions, which arepotentially applicable as semisolid lubricants and bitumen binders, respectively, using lignocellulosic biomass. Inparticular, it focuses on investigating the impact of the silylation process of wheat straw Kraft cellulose pulp(KWP) on the rheological properties of these dispersions. To this end, KWP was functionalized with tert-butyldimethylsilylchloride (TBDMSCl), using imidazole (ImH) as a catalyst, through a simple and efficient method.Different conditions of the silylation process such as temperature (20–100 ◦C), TBDMSCl/ImH ratio (1/2.5–2.5/2.5), and silylation time (2–24 h) were applied to illustrate the flexibility of the proposed methodology. Modifiedpulps with oil and/or bitumen structuring ability were obtained, as a result of the interaction between the hydrophobicalkyl-siloxane segment-containing fibers and these hydrophobic fluids, which enhance the compatibilitybetween both components. Oleo-dispersions with a similar viscoelastic response to lithium grease, used as abenchmark, exhibited significantly reduced coefficients of friction and wear. Meanwhile, bitumen-dispersionsdisplayed a substantial improvement in stiffness and elasticity with the temperature. This work may offer anovel strategy for developing rheology modifiers or structuring agents for industrial hydrophobic fluids
PB Elsevier
SN 0144-8617
SN 1879-1344 (electrónico)
YR 2025
FD 2025-05
LK https://hdl.handle.net/10272/25588
UL https://hdl.handle.net/10272/25588
LA eng
NO Trejo-Cáceres, M., Martín-Alfonso, J. E., & Franco, J. M. (2025). Silylation of wheat straw cellulose pulp for its valorization as rheology modifier of industrial hydrophobic fluids: Cases of castor oil and bitumen. Carbohydrate Polymers, 364, 123778. https://doi.org/10.1016/j.carbpol.2025.123778
NO This work was supported by GreenAsphalt project (grant number: 802C1800001), co-funded by FEDER European Programme (80 %) and Junta de Andalucía (Consejería de Economía, Conocimiento, Empresas y Unversidades/Agencia-IDEA). It has been also co-funded by FEDER European Programme and Junta de Andalucía (grant number: PY20_00751), and by MCIN/AEI/10.13039/501100011033and “ERDF A way of making Europe” (grant number: PID2021–125637OB-I00). Funding for open access charge: Universidad de Huelva/CBUA
DS Repositorio Institucional de la Universidad de Huelva
RD 30 may 2026