title: Preparation and characterization of cellulose regenerated from phosphoric acid.
abstract: Native cellulose has a highly crystalline structure stabilized by a strong intra- and intermolecular hydrogen-bond network. It is usually not considered as a good gelling material and emulsion stabilizer due to its insolubility in water. Chemical modification is generally necessary to obtain cellulose derivatives for these applications. In this study, we have shown that, by simply disrupting the hydrogen-bond network of cellulose with phosphoric acid treatment, the regenerated cellulose can be a good gelling material and emulsion stabilizer. Microscopy, X-ray diffraction, and Fourier transform infrared spectroscopy analysis have confirmed that the regenerated cellulose is primarily amorphous with low crystallinity in the structure of cellulose II. Stable aqueous suspensions and opaque gels that resist flowing can be obtained with the regenerated cellulose at concentrations higher than 0.6% and 1.6%, respectively. Moreover, it can effectively stabilize oil-in-water emulsions at concentrations less than 1% by a mechanism that combines network and Pickering stabilization.
authors.affiliation: College of Food Science and Technology, Nanjing Agricultural University , Weigang 1, Nanjing 210095, People's Republic of China.
authors.forename: Xuejuan
authors.initials: X
authors.lastname: Jia
authors.forename: Yingwen
authors.initials: Y
authors.lastname: Chen
authors.forename: Chong
authors.initials: C
authors.lastname: Shi
authors.forename: Yangfan
authors.initials: Y
authors.lastname: Ye
authors.forename: Peng
authors.initials: P
authors.lastname: Wang
authors.forename: Xiaoxiong
authors.initials: X
authors.lastname: Zeng
authors.forename: Tao
authors.initials: T
authors.lastname: Wu
mesh_terms: D002482:Cellulose / Q000138:chemical synthesis / Q000737:chemistry*; D006860:Hydrogen Bonding; D010756:Phosphoric Acids / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D014961:X-Ray Diffraction
chemical_list: D010756:Phosphoric Acids; D002482:Cellulose; C030242:phosphoric acid