title: Effect of clay concentration on morphology and properties of hydroxypropylmethylcellulose films.
abstract: Hydroxypropylmethylcellulose (HPMC)/montmorillonite (MMT) nanocomposite films are prepared by solution intercalation method. Mechanical, thermal, moisture absorption, optical clarity and water vapor permeability of HPMC/MMT nanocomposite films are measured. X-ray diffraction (XRD) and transmission electron microscopic (TEM) results establish formation of partially intercalated and partially exfoliated HPMC/MMT nanocomposite films. In presence of MMT, the tensile strength, tensile modulus and elongation at break of HPMC films are improved. The thermal stability of HPMC/MMT nanocomposites is better than pure HPMC. The moisture absorption of HPMC film measured in 75% of constant relative humidity is reduced with loading of MMT. Optical clarity of HPMC film is almost unaffected in presence of MMT. Water vapor permeability of HPMC decreases in presence of nanoclay due to increasing tortuous path for diffusion.
authors.affiliation: Department of Polymer Science and Technology, University of Calcutta, 92 A.P.C. Road, Kolkata 700 009, India.
authors.forename: Dibyendu
authors.initials: D
authors.lastname: Mondal
authors.forename: Biplab
authors.initials: B
authors.lastname: Bhowmick
authors.forename: Md Masud R
authors.initials: MM
authors.lastname: Mollick
authors.forename: Dipanwita
authors.initials: D
authors.lastname: Maity
authors.forename: Asis
authors.initials: A
authors.lastname: Mukhopadhyay
authors.forename: Dipak
authors.initials: D
authors.lastname: Rana
authors.forename: Dipankar
authors.initials: D
authors.lastname: Chattopadhyay
mesh_terms: D001546:Bentonite / Q000737:chemistry*; D018857:Food Packaging; D065347:Hypromellose Derivatives; D008747:Methylcellulose / Q000031:analogs & derivatives* / Q000737:chemistry; D053761:Nanocomposites / Q000737:chemistry*; D013718:Tensile Strength; D013818:Thermogravimetry; D014961:X-Ray Diffraction
chemical_list: D001546:Bentonite; D065347:Hypromellose Derivatives; D008747:Methylcellulose