Chitosan-graft-poly(n-butyl acrylate) copolymer: Synthesis and characterization of a natural/synthetic hybrid material.
Two chitosan polymers with different deacetylation degree and molecular weight were subjected to grafting reactions with the aim to enhance the properties of these bio-based materials. Specifically, n-butyl acrylate in different proportions was grafted onto two different deacetylation degree (DD%) chitosan using radical initiation in a surfactant free emulsion system. Infrared spectroscopy was used to confirm grafting and products grafting percentage and efficiency were evaluated against acrylate/chitosan ratio and DD%. Thermal and structural properties and the behavior against water of the raw and grafted biopolymers were studied using several experimental techniques: differential scanning calorimetry, transmission electron microscopy, dynamic light scattering, water swelling, contact angle and positron annihilation lifetime spectroscopy. The influence of the grafting process on the morphological and physicochemical properties of the prepared natural/synthetic hybrid materials is discussed.
Instituto de Física de Materiales Tandil (IFIMAT-UNCPBA) and CIFICEN (UNCPBA-CONICET-CICPBA), Pinto 399 B7000GHG, Tandil, Argentina. Electronic address: psanbinder@inifta.unlp.edu.ar.
Pablo
P
Anbinder
Instituto de Física de Materiales Tandil (IFIMAT-UNCPBA) and CIFICEN (UNCPBA-CONICET-CICPBA), Pinto 399 B7000GHG, Tandil, Argentina. Electronic address: cmacchi@exa.unicen.edu.ar.
Carlos
C
Macchi
Instituto de Investigaciones Físico-Químicas Teóricas y Aplicadas (INIFTA)-(CONICET CCT La Plata-UNLP), Diag. 113 y 64, 1900 La Plata, Argentina; Cátedra de Materiales Poliméricos-Facultad de Ingeniería (UNLP), Calle 1 y 47, 1900 La Plata, Argentina; Centro de Investigación y Desarrollo en Ciencia y Tecnología de los Materiales (CITEMA)-Facultad Regional La Plata (Universidad Tecnológica Nacional), Av. 60 y 124, 1900 La Plata, Argentina. Electronic address: jamalvy@inifta.unlp.edu.ar.
Javier
J
Amalvy
Instituto de Física de Materiales Tandil (IFIMAT-UNCPBA) and CIFICEN (UNCPBA-CONICET-CICPBA), Pinto 399 B7000GHG, Tandil, Argentina. Electronic address: asomoza@exa.unicen.edu.ar.
Alberto
A
Somoza
D000179:Acrylates / Q000737:chemistry*; D048271:Chitosan / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D008970:Molecular Weight; D010316:Particle Size; D011108:Polymers / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D014867:Water / Q000737:chemistry; D014961:X-Ray Diffraction
D000179:Acrylates; D011108:Polymers; C498324:poly(n-butyl acrylate); D014867:Water; D048271:Chitosan
Biopolymer; Chitosan; Graft; Thermal and structural properties; n-Butyl acrylate