6533b86cfe1ef96bd12c81a1

RESEARCH PRODUCT

Bio-inspired consolidants derived from crystalline nanocellulose for decayed wood

Federica FernandezAzar HaghighiClaudia GraiffClelia IscaPier Paolo LotticiGiovanni PredieriRoberta BasileLaura BergamontiBenedetto Pizzo

subject

Wood consolidationMaterials sciencePolymers and PlasticsSettore ICAR/10 - Architettura Tecnica02 engineering and technology010402 general chemistryLignin01 natural sciencesNanocelluloseCrystalline nanocellulosechemistry.chemical_compoundCrystallinityDynamic light scatteringCrystalline nanocellulose Dynamic mechanical analysis Lignin Polydimethylsiloxane Wood consolidationMaterials ChemistryLigninCelluloseFourier transform infrared spectroscopySettore CHIM/02 - Chimica FisicaPolydimethylsiloxaneDynamic mechanical analysisOrganic ChemistryDynamic mechanical analysis021001 nanoscience & nanotechnologySettore ICAR/12 - Tecnologia Dell'Architettura0104 chemical scienceschemistryChemical engineeringSiloxane0210 nano-technology

description

Abstract Novel bio-inspired materials derived from crystalline nanocellulose (CNC) have been tested as wood consolidants. A suspension of CNC, produced by acid hydrolysis of cellulose and used as such or mixed with lignin and/or siloxane derivatives (PDMS), was applied on rotted wood samples of Norway spruce. X-Ray diffraction analysis on CNC powder showed high crystallinity index. Dynamic light scattering (DLS) measurement indicated a nearly uniform particle size distribution with an average hydrodynamic diameter for pure CNC smaller than that in the mixtures. Raman and FTIR spectroscopies suggested interactions between lignin, PDMS and CNC components. The storage modulus of wood samples, measured by Dynamic Mechanical Analysis on the same specimen before and after consolidation, confirmed the efficiency of pure CNC, which displayed a considerable improvement of stiffness. A substantial increase of E’ was observed particularly for most decayed classes. These results suggest a closer interaction between nanocellulose and decayed wood.

yearjournalcountryeditionlanguage
2018-01-01Carbohydrate Polymers
https://doi.org/10.1016/j.carbpol.2018.08.132