A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Confinement‐Induced Ordering and Self‐Folding of Cellulose Nanofibrils
Cellulose is a pervasive polymer, displaying hierarchical lengthscales and exceptional strength and stiffness. Cellulose's complex organization, however, also hinders the detailed understanding of the assembly, mesoscopic properties, and structure of individual cellulose building blocks. This study combines nanolithography with atomic force microscopy to unveil the properties and structure of single cellulose nanofibrils under weak geometrical confinement. By statistical analysis of the fibril morphology, it emerges that confinement induces both orientational ordering and self‐folding of the fibrils. Excluded volume simulations reveal that this effect does not arise from a fibril population bias applied by the confining slit, but rather that the fibril conformation itself changes under confinement, with self‐folding favoring fibril's free volume entropy. Moreover, a nonstochastics angular bending probability of the fibril kinks is measured, ruling out alternating amorphous–crystalline regions. These findings push forward the understanding of cellulose nanofibrils and may inspire the design of functional materials based on fibrous templates.
Confinement‐Induced Ordering and Self‐Folding of Cellulose Nanofibrils
Cellulose is a pervasive polymer, displaying hierarchical lengthscales and exceptional strength and stiffness. Cellulose's complex organization, however, also hinders the detailed understanding of the assembly, mesoscopic properties, and structure of individual cellulose building blocks. This study combines nanolithography with atomic force microscopy to unveil the properties and structure of single cellulose nanofibrils under weak geometrical confinement. By statistical analysis of the fibril morphology, it emerges that confinement induces both orientational ordering and self‐folding of the fibrils. Excluded volume simulations reveal that this effect does not arise from a fibril population bias applied by the confining slit, but rather that the fibril conformation itself changes under confinement, with self‐folding favoring fibril's free volume entropy. Moreover, a nonstochastics angular bending probability of the fibril kinks is measured, ruling out alternating amorphous–crystalline regions. These findings push forward the understanding of cellulose nanofibrils and may inspire the design of functional materials based on fibrous templates.
Confinement‐Induced Ordering and Self‐Folding of Cellulose Nanofibrils
Smith, Kathleen Beth (author) / Tisserant, Jean‐Nicolas (author) / Assenza, Salvatore (author) / Arcari, Mario (author) / Nyström, Gustav (author) / Mezzenga, Raffaele (author)
Advanced Science ; 6
2019-02-01
8 pages
Article (Journal)
Electronic Resource
English
ADDITIVE OF CHEMICALLY-MODIFIED CELLULOSE NANOFIBRILS OR CELLULOSE NANOCRYSTALS
| European Patent Office | 2017
Additive of chemically-modified cellulose nanofibrils or cellulose nanocrystals
| European Patent Office | 2019
Mineralization of poly(l-lactic acid)-based foams induced by cellulose nanofibrils
| British Library Online Contents | 2013
Fabrication and characterization of cellulose nanofibrils/epoxy nanocomposite foam
| British Library Online Contents | 2018
ADDITIVE OF CELLULOSE NANOFIBRILS OR NANOCRYSTALS AND A SECOND POLYMER
| European Patent Office | 2017