Processing and Characterization of Food-Grade Plasticizer-Compatibilized Cellulose Nanocrystals and Ethylene Vinyl Alcohol Copolymer Nanocomposites was written by Nuruddin, Md;Hamlin, Justin;Clarkson, Caitlyn M.;Howarter, John A.;Szczepanski, Caroline R.;Youngblood, Jeffrey P.. And the article was included in ACS Applied Polymer Materials in 2021.Category: esters-buliding-blocks The following contents are mentioned in the article:
In the food-packaging industry, ethylene vinyl alc. (EVOH) is an attractive material due to its excellent gas barrier properties. Unfortunately, moisture sensitivity drastically limits the use of EVOH for packaging applications. To address this shortcoming, EVOH is often layered with other thermoplastic polymers or blended with nanomaterials to create films suitable for food packaging. However, these current nanocomposite strategies are still quite limited as a large volume of solvent is typically required. In this work, we present an approach to develop a food grade, EVOH nanocomposite material containing cellulose nanocrystals (CNCs) via melt compounding. Two food-grade plasticizers (monolaurin and glyceryl monostearate) were studied as potential compatibilizers, and the compatibility of both plasticizers with CNCs and EVOH were evaluated using Hansen solubility parameters (HSPs). The Hansen solubility spheres indicated that monolaurin is a good compatibilizer, and it was thus studied exptl. Excellent dispersion of CNCs into EVOH was achieved by compounding premixed monolaurin and CNCs, prepared by codissoln./evaporation in a suitable ethanol/water cosolvent. Nanocomposite films with effective CNC dispersion prepared in this study also showed enhanced mech., thermal, and water barrier properties. Our results demonstrate the applicability of CNC/monolaurin/EVOH films for packaging applications and demonstrate, for the first time, effective dispersion of CNCs into a food-grade EVOH barrier material using melt compounding. This study involved multiple reactions and reactants, such as Glyceryl monostearate (cas: 31566-31-1Category: esters-buliding-blocks).
Glyceryl monostearate (cas: 31566-31-1) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.Category: esters-buliding-blocks
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics