Cellulose Nanofiber

Catalog	ACMA00030816
Description	Cellulose Nanofibril, Nanofibrillated Cellulose, CNFs
Density	1.50 g/cm³
Appearance	White
Decomposition Temperature	329°C
Feature	Cellulose Crystallinity (XRD): 92%
Form	Dry powder (~4 wt.% moisture)
Particle Size	10-20 nm wide, 2-3 um length

Case Study

Comparison of Nanopaper Prepared from Cellulose Nanocrystals and Cellulose Nanofibers

Mtibe A, et al. Carbohydrate Polymers, 2015, 118, 1-8.

In this work, cellulose nanocrystals (CNC) and cellulose nanofibers (CNF) were successfully extracted by different methods and used to prepare nanopaper and micropaper, respectively. The results showed that nanopaper made from CNF had lower transparency compared to nanopaper produced from CNC, but higher transparency compared to micropaper. In addition, nanopaper produced from CNF had better mechanical properties and higher thermal stability.
Preparation of nanopaper and micropaper based on CNF/CNC
· Cellulose nanopapers and micropapers were produced by evaporating a solvent containing 0.5% by weight of CNCs/CNFs/cellulose pulp.
· The uniformly dispersed suspensions were poured into petri dishes with a 195 mm diameter and left to dry at room temperature for 48 hours.
· Subsequently, the nanopapers and micropapers were transferred to a controlled climate (20 °C and 50% relative humidity) for final conditioning prior to additional analysis.

Development and Application of Cellulose Nanofiber-Based Hydrogel Materials

Guan Q F, et al. ACS nano, 2021, 15(5), 7889-7898.

Cellulose nanofiber (CNF)-based hydrogels, which have three-dimensional nanofiber networks and unique physical properties, can achieve multiple functions through different preparation methods and structural designs. The following are examples of the development and application of CNF-based hydrogels in different fields:
· Elastic hydrogels: Hu et al. reported a highly elastic hydrated CNF material from natural wood. They used NaOH/NaSO3 to partially dissolve the lignin and hemicellulose in balsa wood, causing the CNF inside the wood to swell. Then, CNF was assembled into the wood using freeze-drying to form an internal gel, which swelled again by absorbing water to form an elastic CNF-based hydrogel.
· Ion-conductive hydrogels: Based on the anisotropic porous structure of natural wood, Hu and colleagues prepared a CNF-based hydrated material with high ionic conductivity. Due to the high water content of the CNF hydrogel network and the negative charge on the CNF surface, CNF-based hydrogels exhibit excellent ionic conductivity in saline solutions.
· Hydrogels for water purification: To construct CNF-based nanocomposite hydrogels, Guan et al. designed and implemented a functional composite hydrogel with a hierarchical structure that combines the functions of light management, thermal management, water transport, and reduced evaporation enthalpy.