title: Effect of cellulose nanocrystals and gelatin in corn starch plasticized films.
abstract: Cellulose at the nanoparticle scale has been studied as a reinforcement for biodegradable matrices to improve film properties. The goal has been to investigate the properties of starch/gelatin/cellulose nanocrystals (CNC) films. Eleven treatments were considered using RCCD (rotatable central composite design), in addition to four control treatments. For each assay, the following dependent variables were measured: water vapor permeability (WVP), thickness, opacity and mechanical properties. The microstructure and thermal properties of the films were also assessed. Increases in gelatin and CNC concentrations lead to increases in film thickness, strength and elongation at break. The films containing only gelatin in their matrix displayed better results than the starch films, and the addition of CNC had a positive effect on the assessed response variables. The films exhibited homogeneous and cohesive structures, indicating strong interactions between the filler and matrix. Films with low levels of gelatin and CNC presented the maximum degradation temperature.
authors.affiliation: Departamento de Ciência dos Alimentos, Universidade Federal de Lavras, Caixa Postal 3037, CEP 37200-000 Lavras, MG, Brazil. Electronic address: janyelle_alves@yahoo.com.br.
authors.forename: J S
authors.initials: JS
authors.lastname: Alves
authors.affiliation: Departamento de Ciências Exatas, Universidade Federal de Lavras, Caixa Postal 3037, CEP 37200-000 Lavras, MG, Brazil. Electronic address: kelen_cr@yahoo.com.br.
authors.forename: K C
authors.initials: KC
authors.lastname: dos Reis
authors.affiliation: Departamento de Ciência dos Alimentos, Universidade Federal de Lavras, Caixa Postal 3037, CEP 37200-000 Lavras, MG, Brazil. Electronic address: evandrogtmenezes@gmail.com.
authors.forename: E G T
authors.initials: EG
authors.lastname: Menezes
authors.affiliation: Instituto de Ciência Exatas, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Pampulha, Caixa Postal 702, CEP 31270-901 Belo Horizonte, MG, Brazil. Electronic address: fabianovp@ufmg.br.
authors.forename: F V
authors.initials: FV
authors.lastname: Pereira
authors.affiliation: Departamento de Ciência dos Alimentos, Universidade Federal de Lavras, Caixa Postal 3037, CEP 37200-000 Lavras, MG, Brazil. Electronic address: joper@dca.ufla.br.
authors.forename: J
authors.initials: J
authors.lastname: Pereira
mesh_terms: D002482:Cellulose / Q000737:chemistry*; D005780:Gelatin / Q000737:chemistry*; D055595:Mechanical Phenomena; D053758:Nanoparticles / Q000737:chemistry*; D055620:Optical Phenomena; D010539:Permeability; D010968:Plasticizers / Q000737:chemistry*; D013213:Starch / Q000737:chemistry*; D013696:Temperature; D014835:Volatilization; D014867:Water / Q000737:chemistry; D003313:Zea mays / Q000737:chemistry*
chemical_list: D010968:Plasticizers; C015233:gelatin film; D014867:Water; D005780:Gelatin; D002482:Cellulose; D013213:Starch
keywords: Barrier properties; Biopolymers; Glycerol (PubChem CID: 753); Mechanical properties; Nanobiocomposite; Packaging; RCCD; Sulfuric acid (PubChem CID: 1118); Water (PubChem CID: 962)