Preparation and characterization of new polyimide films containing zeolite L and/or silica

New polyimide (PI) films containing zeolite L and/or silica, having a thickness of tens of micrometers, were prepared using a PI matrix with pendant carboxylic groups. The influence of various ratios of inorganic filler on thermal stability, dielectric behavior, and gas transport properties of the films was studied with respect to their structure. The surface morphology was investigated by scanning electron microscopy. The films were flexible, tough, and showed good thermal properties with a glass transition temperature in the range of 187–218°C. The dielectric spectroscopy revealed γ and β subglass transitions having the corresponding relaxation activation energy in the range of 44.7–51.4 kJ mol−1 and 65.1–121.6 kJ mol−1, respectively. At temperatures above 200°C, a conductivity relaxation process was evidenced. Gas permeation tests using small molecules (O2, N2 and CO2), at 6 atm and 30°C, indicated that the PI films containing higher amount of zeolite showed the highest permeability for all gases.

[1]  Bernd Faust,et al.  Dielectric Spectroscopy Of Polymeric Materials Fundamentals And Applications , 2016 .

[2]  S. Ioan,et al.  Origin of dielectric response and conductivity of some alicyclic polyimides , 2013 .

[3]  T. K. Chaki,et al.  Development of polyimide–nanosilica filled EPDM based light rocket motor insulator compound: Influence of polyimide–nanosilica loading on thermal, ablation, and mechanical properties , 2013 .

[4]  S. Lanceros‐Méndez,et al.  Influence of zeolite structure and chemistry on the electrical response and crystallization phase of poly(vinylidene fluoride) , 2013, Journal of Materials Science.

[5]  Juin-Yih Lai,et al.  Advanced polyimide materials: Syntheses, physical properties and applications , 2012 .

[6]  B. Bernauer,et al.  Mixed matrix membranes based on 3-aminopropyltriethoxysilane endcapped polyimides and silicalite-1 , 2012 .

[7]  L. Okrasa,et al.  The effect of zeolite L content on dielectric behavior and thermal stability of polyimide thin films , 2012, Journal of Materials Science.

[8]  L. Okrasa,et al.  Polymer hybrid films based on silica and a poly(ether imide) containing phthalide groups , 2011 .

[9]  Tăchiță Vlad‐Bubulac,et al.  Silica-containing fluorinated poly(amide-imide) hybrid films , 2011 .

[10]  J. D. Abajo,et al.  Effect of 3,5-diaminobenzoic acid content, casting solvent, and physical aging on gas permeation properties of copolyimides containing pendant acid groups , 2011 .

[11]  A. Jankowski,et al.  Physical, optical and gas transport properties of new processable polyimides and poly(amideimide)s obtained from 4,4'-[oxybis(4,1-phenylenethio)]dianiline and aromatic dianhydrides , 2011 .

[12]  M. Cristea,et al.  Thermal and electrical properties of nitrile-containing polyimide/BaTiO3 composite films , 2011 .

[13]  L. Okrasa,et al.  Silica/polyimide-polydimethylsiloxane hybrid films. Thermal and electrical properties , 2011 .

[14]  J. Ferraris,et al.  Molecular sieving realized with ZIF-8/Matrimid® mixed-matrix membranes , 2010 .

[15]  A. C. Lopes,et al.  Enhancement of the Dielectric Constant and Thermal Properties of α-Poly(vinylidene fluoride)/Zeolite Nanocomposites , 2010 .

[16]  E. Hamciuc,et al.  Thermal and electrical behavior of polyimide/silica hybrid thin films , 2010 .

[17]  H. Aghabozorg,et al.  Synthesis and morphology of nanosized zeolite L , 2010 .

[18]  Douglass S. Kalika,et al.  Dynamic relaxation characteristics of Matrimid® polyimide , 2009 .

[19]  Süleyman Köytepe,et al.  Preparation and structural properties of Fe3O4–polyimide hybrid nanocomposites , 2009 .

[20]  Kang Li,et al.  THE EFFECT OF TYPE ZEOLITE ON THE GAS TRANSPORT PROPERTIES OF POLYIMIDE-BASED MIXED MATRIX MEMBRANES , 2008 .

[21]  Shaukat Saeed,et al.  Mechanical and thermal properties of polyimide/silica hybrids with imide-modified silica network structures , 2008, Journal of Applied Polymer Science.

[22]  E. Izci,et al.  Dielectric Behavior of the Catalyst Zeolite NaY , 2007 .

[23]  Brian F. Towler,et al.  Polymer-inorganic nanocomposite membranes for gas separation , 2007 .

[24]  William J. Koros,et al.  Mixed matrix hollow fiber membranes made with modified HSSZ-13 zeolite in polyetherimide polymer matrix for gas separation , 2007 .

[25]  Ş. Tantekin-Ersolmaz,et al.  Copolyimide Membranes for Gas Separation , 2006 .

[26]  Tomoyuki Suzuki,et al.  Gas Transport Properties of ODPA-TAPOB Hyperbranched Polyimide-Silica Hybrid Membranes , 2006 .

[27]  Benny D. Freeman,et al.  Materials science of membranes for gas and vapor separation , 2006 .

[28]  Sangil Kim,et al.  Preparation and characterization of a poly(imide siloxane) and zeolite L mixed matrix membrane , 2006 .

[29]  Sangil Kim,et al.  Fabrication and characterization of polyimide–zeolite L mixed matrix membranes for gas separations , 2006 .

[30]  Y. Aydogdu,et al.  DC and AC conductivity and dielectric properties of the metal-radical compound: Aqua[bis(2-dimethylaminomethyl-4-NIT-phenolato)]copper(II) , 2003 .

[31]  Werner J. Blau,et al.  Experimental observation of scaling laws for alternating current and direct current conductivity in polymer-carbon nanotube composite thin films , 2002 .

[32]  S. Muruganand,et al.  Dielectric and conduction properties of pure polyimide films , 2001 .

[33]  J. Cavaillé,et al.  Secondary Mechanical Relaxations in Amorphous Cellulose , 1997 .