Fabrication of polyurushiol/Ag composite porous films using an in situ photoreduction method

In this work, polyurushiol (PUS) was synthesized through a Friedel–Crafts reaction using brönsted acid as a catalyst. The product was then utilized in the fabrication of honeycomb porous films by breath figures (BFs). The PUS porous films were subsequently exposed to a high pressure mercury lamp for...

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Bibliographic Details
Published in:Polymer bulletin (Berlin, Germany) Germany), 2016-06, Vol.73 (6), p.1639-1647
Main Authors: Wang, Donghui, Zhang, Meng, Luo, Zhen, Bai, Weibin, Xu, Yanlian, Lin, Jinhuo
Format: Article
Language:English
Subjects:
Aqueous solutions
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Complex Fluids and Microfluidics
Electronic properties
Friedel-Crafts reaction
Humidity
Irradiation
Mercury lamps
Molecular weight
Nanoparticles
Organic Chemistry
Original Paper
Physical Chemistry
Polymer films
Polymer Sciences
Polymers
Pore size
Reducing agents
Scanning electron microscopy
Silver
Silver nitrate
Soft and Granular Matter
Solvents
Ultraviolet radiation
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Summary:In this work, polyurushiol (PUS) was synthesized through a Friedel–Crafts reaction using brönsted acid as a catalyst. The product was then utilized in the fabrication of honeycomb porous films by breath figures (BFs). The PUS porous films were subsequently exposed to a high pressure mercury lamp for several seconds (5–30 s). An AgNO 3 solution was then dripped onto the surface of films to form PUS/Ag composite porous films through the in situ photoreduction method, avoiding the use of harmful reducing agents. Key preparation factors, including solvent type, UV irradiation time and AgNO 3 concentration, were systematically investigated. The composite films were characterized using scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD). Ag particles (approximate size of 50 nm) were formed on the surface of PUS porous films when water was used as a solvent. In addition, increased AgNO 3 concentration or UV irradiation time facilitated a change in the conductivity state of PUS/Ag porous films from insulator to semiconductor. The as-prepared PUS/Ag composite porous films provided excellent electronic properties and thus provided significant potential for future application in various fields. Graphical abstract
ISSN:0170-0839
1436-2449
DOI:10.1007/s00289-015-1568-0