Modification of cellulose nanocrystals with 2-carboxyethyl acrylate in the presence of epoxy resin to enhance its adhesive property

Abstract

We synthesized the cellulose nanocrystals (CNCs) by using cotton as a raw material, then it was modified with 2-carboxyethyl acrylate to improve its adhesion and thermal properties. CNCs was chosen as a modifier to improve the interfacial adhesion between the reinforced nanocrystals and E-51 epoxy resin system. This gives a better modulus of elasticity, a lower coefficient of energy, and thermal expansion. Significant improvements in modulus properties, strength, transparency and thermal stability were observed with modified cellulose nanocrystals (MCNCs) compared with the standard sample. SEM, and transmission electron microscope (TEM), powder diffraction (XRD), (TGA and DTG) and Fourier transform infrared spectroscopy (FTIR) were used for the isolation of synthetic (native and modified) cellulose nanocrystals. In addition, the MCNCs adhesion properties with E-51 (Bisphenol A diglycidyl ether) epoxy resins were also investigated using the Zwick/Roell Z020 model.

A Review on Isatin and Its Derivatives: Synthesis, Reactions and Applications

“…The indole moiety in this compound is made up of a pyrrolidine ring fused to benzene to form 2, 3-dihydro indole. It is a monoamino oxidase inhibitor that's been detected in high concentrations in the urine of Parkinson's patients [2][3][4][5][6]. In the field of heterocyclic and pharmaceutical chemistry, isatins are useful intermediates [7,8].…”