Hierarchical porous structures in cellulose: NMR relaxometry approach

Mechanically robust cationic cellulose nanofibril 3D scaffolds with tuneable biomimetic porosity for cell culture

“…DMAc does not significantly modify the cellulose pore structure, while water, often used as molecular probe for relaxometry experiments, alters the pore distributions in biomass samples. 62 Lyophilised modified cellulose foams and films were dried under reduced pressure (640 mmHg) for 24 h at 80 1C. Samples were soaked in DMAc and kept in a desiccator under a 600 mmHg vacuum for 36 h, following which excess DMAc was removed by centrifuge filtration at 600 g for 1 min (Corning Costar Spin-X, 0.45 mm, nylon membrane filter).…”

On the subtle tuneability of cellulose hydrogels: implications for binding of biomolecules demonstrated for CBM 1

“…The absence of a precise value for the relaxivity constant of water (PBS) inside cellulose pores frustrates association of T 2 distributions with specific pore diameters. However, based on previously published data 48 and on the averaged T 2 values reported for pure water filling pores of known dimensions in cellulose, [49][50][51][52] the relaxivity of pure water inside cellulose pores can be estimated to be in the range 10 À6 -10 À7 nm s À1 . Thus, using the relation between pore dimension T 2 and relaxivity constant previously reported, 48 the T 2 range from 10-100 ms was ascribed to pores with dimensions in the range 10-100 nm and the T 2 range from 100 ms to 1 s to pores with dimensions in the range 100 nm to a few mm.…”

Bagasse sugarcane fibers as reinforcement agents for natural composites: description and polymer composite applications

“…The matrix works as a continuous phase surrounding the reinforcement, while fibers are referred to as the discontinuous phase. This phase is generally harder and exhibits mechanical properties superior to those of the continuous phases [31]. Despite matrices can be made of metallic or ceramic materials, there is a wide range of composite applications refers to polymeric matrices.…”