Engineering polymer film porosity for solvent triggered actuation

Soft Matter ◽  
2021 ◽  
Author(s):  
Rumiaya Pervin ◽  
Pijush Ghosh ◽  
Madivala G. Basavaraj
Keyword(s):  
Polymer Film ◽  
Polymer Films ◽  
Porous Polymer ◽  
Novel Approach ◽  
Response To Water ◽  
Film Porosity

A novel approach for the fabrication of porous polymer films and their self-folding behavior in response to water is investigated.

Spatially directed vesicle capture in the ordered pores of breath-figure polymer films

Soft Matter ◽  
2015 ◽  
Vol 11 (26) ◽  
pp. 5188-5191 ◽  
Author(s):  
J. S. Arora ◽  
T. Ponnusamy ◽  
R. Zheng ◽  
P. Venkataraman ◽  
S. R. Raghavan ◽  
...  
Keyword(s):  
Polymer Film ◽  
Polymer Films ◽  
Porous Polymer ◽  
Breath Figures ◽  
Hydrophobically Modified ◽  
Breath Figure

A hydrophobically modified biopolymer (chitosan) when deposited in the pores of patterned polymeric breath figures insets its hydrophobes into liposomal bilayers. This is a facile method to capture and tether liposomes in a patterned porous polymer film.

scholarly journals Formation of half-period surface relief gratings in azobenzene containing polymer films

2020 ◽  
Vol 126 (9) ◽  
Author(s):  
Joachim Jelken ◽  
Carsten Henkel ◽  
Svetlana Santer
Keyword(s):  
Polymer Film ◽  
Polymer Films ◽  
Surface Relief ◽  
Incident Light ◽  
Glassy State ◽  
Polarized Light ◽  
Half Period ◽  
Polarization Distribution ◽  
Linearly Polarized ◽  
Set Up

Abstract We study the peculiar response of photo-sensitive polymer films irradiated with a certain type of interference pattern where one interfering beam is S-polarized, while the second one is P-polarized. The polymer film, although in a glassy state, deforms following the local polarization distribution of the incident light, and a surface relief grating (SRG) appears whose period is half the optical one. All other types of interference patterns result in the matching of both periods. The topographical response is triggered by the alignment of photo-responsive azobenzene containing polymer side chains orthogonal to the local electrical field, resulting in a bulk birefringence grating (BBG). We investigate the process of dual grating formation (SRG and BBG) in a polymer film utilizing a dedicated set-up that combines probe beam diffraction and atomic force microscopy (AFM) measurements, and permits acquiring in situ and in real-time information about changes in local topography and birefringence. We find that the SRG maxima appear at the positions of linearly polarized light (tilted by 45° relative to the grating vector), causing the formation of the half-period topography. This permits to inscribe symmetric and asymmetric topography gratings with sub-wavelength period, while changing only slightly the polarization of one of the interfering beams. We demonstrate an easy generation of sawtooth profiles (blazed gratings) with adjustable shape. With these results, we have taken a significant step in understanding the photo-induced deformation of azo-polymer films.

scholarly journals MOF Channels within Porous Polymer Film: Flexible, Self-Supporting ZIF-8 Poly(ether sulfone) Composite Membrane

2016 ◽  
Vol 28 (21) ◽  
pp. 7638-7644 ◽  
Author(s):  
Samuel C. Hess ◽  
Robert N. Grass ◽  
Wendelin J. Stark
Keyword(s):  
Polymer Film ◽  
Composite Membrane ◽  
Porous Polymer

Simple fabrication of a three-dimensional porous polymer film as a diffuser for organic light emitting diodes

Nanoscale ◽  
2014 ◽  
Vol 6 (23) ◽  
pp. 14446-14452 ◽  
Author(s):  
Byung Wan Lim ◽  
Min Chul Suh
Keyword(s):  
Polymer Film ◽  
Spin Coating ◽  
Three Dimensional ◽  
Cost Effective ◽  
Porous Polymer ◽  
Organic Light Emitting Diodes ◽  
Coating Process ◽  
Light Emitting ◽  
Organic Light ◽  
Ultrasonic Humidifier

We have investigated a simple and cost-effective fabrication method for a porous polymer film employing the spin-coating process during continuous supply of water droplets by an ultrasonic humidifier.

Fabrication of porous thin films of block copolymer at the liquid/liquid interface and construction of composite films doped with noble metal nanoparticles

RSC Advances ◽  
2015 ◽  
Vol 5 (85) ◽  
pp. 69339-69347 ◽  
Author(s):  
Qian Wang ◽  
Xingjuan Zhao ◽  
Xiao-Kai Zhang ◽  
Yong-Ill Lee ◽  
Hong-Guo Liu
Keyword(s):  
Thin Films ◽  
Block Copolymer ◽  
Metal Nanoparticles ◽  
Polymer Film ◽  
Noble Metal ◽  
Composite Films ◽  
Liquid Interface ◽  
Porous Polymer ◽  
Noble Metal Nanoparticles ◽  
Porous Thin Films

A porous polymer film was fabricated at a liquid/liquid interface that can be used as a matrix to form various composite films.

scholarly journals Recent advances in honeycomb-structured porous polymer films prepared via breath figures

2012 ◽  
Vol 48 (6) ◽  
pp. 1001-1025 ◽  
Author(s):  
Pierre Escalé ◽  
Laurent Rubatat ◽  
Laurent Billon ◽  
Maud Save
Keyword(s):  
Polymer Films ◽  
Porous Polymer ◽  
Breath Figures ◽  
Recent Advances

Monitoring morphological and optical properties on hybrid porous polymer films

2017 ◽  
Vol 22 (8) ◽  
pp. 741-751 ◽  
Author(s):  
Guadalupe del C. Pizarro ◽  
Oscar G. Marambio ◽  
Manuel Jeria-Orell ◽  
Diego P. Oyarzún ◽  
Rudy Martin-Trasanco ◽  
...  
Keyword(s):  
Optical Properties ◽  
Polymer Films ◽  
Porous Polymer

scholarly journals Tailoring pore distribution in polymer films via evaporation induced phase separation

RSC Advances ◽  
2019 ◽  
Vol 9 (27) ◽  
pp. 15593-15605 ◽  
Author(s):  
Rumiaya Pervin ◽  
Pijush Ghosh ◽  
Madivala G. Basavaraj
Keyword(s):  
Phase Separation ◽  
Polymer Films ◽  
Pore Distribution ◽  
Porous Polymer ◽  
Fundamental Understanding

The work contributes to a fundamental understanding of how to regulate the microstructure of porous polymer films fabricated via evaporation induced phase separation (EIPS).

Electric Field Induced Patterning of Polymer Films

2001 ◽  
Vol 705 ◽  
Author(s):  
David G. Bucknall ◽  
G. Andrew ◽  
D. Briggs
Keyword(s):  
Simple Model ◽  
Electric Field ◽  
Polymer Film ◽  
Polymer Films ◽  
Strong Electric Field ◽  
Length Scales ◽  
Observed Behaviour

AbstractBy confining a polymer film between two electrodes one of which is solid but thin enough to be flexible, a characteristic lateral morphology is produced when a strong electric field is applied across the film. A simple model to describe the observed behaviour is presented which accounts for the length scales of the observed morphology. This model demonstrates that feature sizes ranging from microns to nanometers can be obtained through selective choice of key parameters.

Bead-based DNA Microarray Fabricated on Porous Polymer Films

2009 ◽  
pp. 842-845 ◽  
Author(s):  
J. T. Cheng ◽  
J. Li ◽  
N. G. Chen ◽  
P. Gopalakrishnakone ◽  
Y. Zhang
Keyword(s):  
Dna Microarray ◽  
Polymer Films ◽  
Porous Polymer
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