title: Studies of the plasticizing effect of different hydrophilic inorganic salts on starch/poly (vinyl alcohol) films.
abstract: The effects of different inorganic salts LiCl, MgCl2·6H2O, CaCl2, and AlCl3·6H2O on the crystalline, thermal, water vapor barrier, and tensile properties of starch/PVA films were studied. The high plasticizing efficiency of all these four inorganic salts for starch/PVA film was confirmed by the obtained results. These four salts all had a good compatibility with starch/PVA within the content of 15 wt% and starch/PVA became completely miscible with the addition of 15 wt% inorganic salts. All these four salts had a strong destroying effect on the crystals of starch and PVA. Among these four salts, AlCl3·6H2O had the largest negative effect on the thermal stability of starch/PVA and LiCl had the largest improving effect on the water sorption rate of starch/PVA film. On the whole MgCl2·6H2O and CaCl2 were the more suitable plasticizer for starch/PVA film among these four inorganic salts. With the addition of 15 wt% MgCl2·6H2O and CaCl2, the elongation at break of starch/PVA film could reach to 418.83% and 434.80%, respectively.
authors.affiliation: School of Chemical Engineering, Fuzhou University, Fuzhou 350108, PR China.
authors.forename: Xiancai
authors.initials: X
authors.lastname: Jiang
authors.affiliation: School of Chemical Engineering, Fuzhou University, Fuzhou 350108, PR China.
authors.forename: Hongmei
authors.initials: H
authors.lastname: Li
authors.affiliation: School of Chemical Engineering, Fuzhou University, Fuzhou 350108, PR China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Luo
authors.affiliation: School of Chemical Engineering, Fuzhou University, Fuzhou 350108, PR China.
authors.forename: Yulai
authors.initials: Y
authors.lastname: Zhao
authors.affiliation: School of Chemical Engineering, Fuzhou University, Fuzhou 350108, PR China. Electronic address: lxhou@fzu.edu.cn.
authors.forename: Linxi
authors.initials: L
authors.lastname: Hou
mesh_terms: D002152:Calorimetry, Differential Scanning; D057927:Hydrophobic and Hydrophilic Interactions; D055595:Mechanical Phenomena; D010968:Plasticizers / Q000737:chemistry*; D011142:Polyvinyl Alcohol / Q000737:chemistry*; D012492:Salts / Q000737:chemistry* / Q000494:pharmacology; D013213:Starch / Q000737:chemistry*; D013818:Thermogravimetry; D014961:X-Ray Diffraction
chemical_list: D010968:Plasticizers; D012492:Salts; D011142:Polyvinyl Alcohol; D013213:Starch
keywords: Inorganic salt; Poly (vinyl alcohol); Starch