|Researchers at Purdue University have created new process for controlled dispersion of cellulose nanomaterials using carboxymethylcellulose. Cellulose nanomaterials materials are desirable as they are sustainable, biodegradable, and highly abundant in nature. CNCs can be used in cosmetic, composite, paint, ink, gas, packaging, construction, and food applications – to name a few. Currently, agglomeration of CNCs can occur as they are dried, and processes used to reduce this effect traditionally involve costly, energy-intensive methods as well as often compromise material properties. Purdue researchers have combined a polymer shear mixing technique to create CNC and a CMC dispersion that allows for redispersion the material. The technique can also hinder redispersion as desired by soaking the dispersion in multi-valent salt solutions or dilute acids. Further, this improves the material's ability to dry evenly and homogenously.
-Improved Drying Step in CNC/CMC Material Development
-Material Science and Engineering
The charge potential was tested for pure CNC versus the CNC + CMC mixture at various stages in the drying process.
"Enhanced dispersion and properties of a two-component epoxy nanocomposite using surface modified cellulose nanocrystals"
Polymer, a journal of Materials Today
Mar 15, 2021
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