Formation of honeycomb-patterned microporous films based on a fluorinated poly(siloxane imide) segmented copolymer

2010 ◽  
Vol 119 (6) ◽  
pp. 3329-3337 ◽  
Author(s):  
Xue Jiang ◽  
Jian Gu ◽  
Yan Shen ◽  
Shugen Wang ◽  
Xiuzhi Tian
Keyword(s):  
Microporous Films

scholarly journals Design and Development of Enhanced Antimicrobial Breathable Biodegradable Polymeric Films for Food Packaging Applications

Polymers ◽  
2021 ◽  
Vol 13 (20) ◽  
pp. 3527
Author(s):  
Mona M. Abd Al-Ghani ◽  
Rasha A. Azzam ◽  
Tarek M. Madkour
Keyword(s):  
Food Packaging ◽  
Transmission Rate ◽  
Air Permeability ◽  
Optimal Number ◽  
Food Protection ◽  
Oxygen Transmission Rate ◽  
Microporous Films ◽  
Vitro Analysis ◽  
In Vitro Analysis

The principle of breathable food packaging is to provide the optimal number of pores to transfer a sufficient amount of fresh air into the packaging headspace. In this work, antimicrobial microporous eco-friendly polymeric membranes were developed for food packaging. Polylactic acid (PLA) and polycaprolactone (PCL) were chosen as the main packaging polymers for their biodegradability. To develop the microporous films, sodium chloride (NaCl) and polyethylene oxide (PEO) were used as porogenic agents and the membranes were prepared using solvent-casting techniques. The results showed that films with of 50% NaCl and 10% PEO by mass achieved the highest air permeability and oxygen transmission rate (O2TR) with PLA. Meanwhile, blends of 20% PLA and 80% PCL by mass showed the highest air permeability and O2TR at 100% NaCl composition. The microporous membranes were also coated with cinnamaldehyde, a natural antimicrobial ingredient, to avoid the transportation of pathogens through the membranes into the packaged foods. In vitro analysis showed that the biodegradable membranes were not only environmentally friendly but also allowed for maximum food protection through the transportation of sterile fresh air, making them ideal for food packaging applications.

Link between gas permeability and the structure of microporous films of polyethylene terephthalate stretched in adsorption-active media

1988 ◽  
Vol 30 (5) ◽  
pp. 991-999 ◽  
Author(s):  
Ye.A. Sinevich ◽  
M.S. Arzhakov ◽  
M.A. Krykin ◽  
S.F. Timashev ◽  
N.F. Bakeyev
Keyword(s):  
Polyethylene Terephthalate ◽  
Gas Permeability ◽  
Active Media ◽  
Microporous Films

Poly(Ethylene Oxide) Functionalized Polyimide-Based Microporous Films to Prevent Bacterial Adhesion

2015 ◽  
Vol 7 (18) ◽  
pp. 9716-9724 ◽  
Author(s):  
Aránzazu Martínez-Gómez ◽  
Cristina Alvarez ◽  
Javier de Abajo ◽  
Adolfo del Campo ◽  
Aitziber L. Cortajarena ◽  
...  
Keyword(s):  
Ethylene Oxide ◽  
Bacterial Adhesion ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Microporous Films

scholarly journals Poly(styrene)/oligo(fluorene)-intercalated fluoromica hybrids: synthesis, characterization and self-assembly

2014 ◽  
Vol 5 ◽  
pp. 2450-2458 ◽  
Author(s):  
Giuseppe Leone ◽  
Francesco Galeotti ◽  
William Porzio ◽  
Guido Scavia ◽  
Luisa Barba ◽  
...  
Keyword(s):  
Self Assembly ◽  
In Situ Polymerization ◽  
Polymeric Films ◽  
Homogeneous Distribution ◽  
Solid Films ◽  
Polymer Hybrid ◽  
Interlayer Region ◽  
Microporous Films ◽  
Enhanced Photostability

We report on the intercalation of a cationic fluorescent oligo(fluorene) in between the 2D interlayer region of a fluoromica type silicate. The formation of intercalated structures with different fluorophore contents is observed in powders by synchrotron radiation XRD. Successively, the hybrids are dispersed in poly(styrene) through in situ polymerization. Such a procedure allows us to synthesize the materials from solution, to achieve solid films, and to characterize them by optical and morphologic techniques. The polymeric films with homogeneous distribution of the hybrids exhibit ultraviolet–blue photoluminescence with a significantly enhanced photostability compared to the bare oligo(fluorene)s. Finally, under specific conditions, the polymer hybrid with higher oligo(fluorene) content spontaneously assembles into highly ordered microporous films.

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