title: Preparation and characterization of glycerol plasticized-pea starch/ZnO-carboxymethylcellulose sodium nanocomposites.
abstract: Among natural polymers, starch is one of the most promising biodegradable materials because it is a renewable bioresource that is universally available and of low cost. However, the properties of starch-based materials are not satisfactory. One approach is the use of nano-filler as reinforcement for starch-based materials. In this paper, a nanocomposite is prepared using ZnO nanoparticles stabilized by carboxymethylcellulose sodium (CMC) as the filler in glycerol plasticized-pea starch (GPS) matrix by the casting process. According to the characterization of ZnO-CMC particles with Fourier transform infrared (FTIR), Ultraviolet-visible (UV-vis), X-ray diffraction (XRD), transmission electron microscope (TEM) and thermogravimetric analysis (TG), ZnO (about 60 wt%) is encapsulated with CMC (about 40 wt%) in ZnO-CMC particles with the size of about 30-40 nm. A low loading of ZnO-CMC particles can obviously improve the pasting viscosity, storage modulus, the glass transition temperature and UV absorbance of GPS/ZnO-CMC nanocomposites. When the ZnO-CMC contents vary from 0 to 5 wt%, the tensile yield strength increase from 3.94 MPa to 9.81 MPa, while the elongation at break reduce from 42.2% to 25.8%. The water vapor permeability decrease from 4.76 x 10(-10) to 1.65 x 10(-10) g m(-1) s(-1) Pa(-1).
authors.affiliation: School of Science, Tianjin University, Tianjin 300072, China.
authors.forename: Jiugao
authors.initials: J
authors.lastname: Yu
authors.forename: Jingwen
authors.initials: J
authors.lastname: Yang
authors.forename: Baoxiang
authors.initials: B
authors.lastname: Liu
authors.forename: Xiaofei
authors.initials: X
authors.lastname: Ma
mesh_terms: D002266:Carboxymethylcellulose Sodium / Q000737:chemistry*; D055119:Elastic Modulus; D005990:Glycerol / Q000737:chemistry*; D006244:Hardness; D008422:Materials Testing; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D018532:Pisum sativum / Q000737:chemistry*; D010539:Permeability; D044367:Phase Transition; D010969:Plastics / Q000737:chemistry; D016062:Porosity; D012964:Sodium / Q000737:chemistry*; D013213:Starch / Q000737:chemistry*; D013718:Tensile Strength; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D010969:Plastics; D013213:Starch; D012964:Sodium; D002266:Carboxymethylcellulose Sodium; D005990:Glycerol; D015034:Zinc Oxide