CO2-Responsive polymer membranes with gas-tunable pore size

2017 ◽  
Vol 53 (69) ◽  
pp. 9574-9577 ◽  
Author(s):  
Liangliang Dong ◽  
Weizheng Fan ◽  
Hongji Zhang ◽  
Mingqing Chen ◽  
Yue Zhao
Keyword(s):  
Gold Nanoparticles ◽  
Pore Size ◽  
Polymer Membranes ◽  
Polymer Membrane ◽  
Size Exclusion ◽  
Responsive Polymer

A novel type of CO2-responsive polymer membrane shows gas-tunable pore size that can be used for size exclusion-based filtration of gold nanoparticles.

Perforated Micro- and Nanopores in Free-Standing Polymer Membranes Fabricated by Nanoimprint Lithography and Pressed Self-Perfection Method

2009 ◽  
Author(s):  
Junseo Choi ◽  
Sunggook Park
Keyword(s):  
Pore Size ◽  
Nanoimprint Lithography ◽  
Sacrificial Layer ◽  
Polymer Membranes ◽  
Polymer Membrane ◽  
Imprint Lithography ◽  
Free Standing ◽  
Membrane Layer ◽  
Layer Technique ◽  
Quartz Wafer

This study presents a stable and flexible method for fabricating a free-standing polymer membrane with perforated micro- and nanopores using an imprint lithography combined with a pressed self-perfection method and a sacrificial layer technique. For the fabrication, micropores were initially patterned on a double resist layer: the upper SU-8 resist layer as an active membrane layer and the lower life-off resist used as a sacrificial layer. The membrane with micropores was then pressed with a flat quartz wafer to reduce pore size down to sub-micrometer. Finally, a free-standing SU-8 membrane with perforated micro- and nanopores was successfully lifted-off from the substrate by dissolving the sacrificial layer.

Preparation of Porous Polymer Membrane with Controllable Pore Size via Spray Spinning

2017 ◽  
Vol 909 ◽  
pp. 157-162
Author(s):  
Wen Ting Sun ◽  
Shuang Xi Liu ◽  
Xiao Yu Hu ◽  
Qiu Ying Jia ◽  
Ya Qin Shen ◽  
...  
Keyword(s):  
Pore Size Distribution ◽  
Pore Size ◽  
Size Distribution ◽  
Polymer Membranes ◽  
Processing Parameters ◽  
Polymer Membrane ◽  
Water Soluble ◽  
Porous Polymer ◽  
The Novel ◽  
Uniform Pore Size

Polymer membranes with fixed pore size or narrow pore size distribution can be used for special separation. However, polymer membranes prepared by conventional method usually have wide pore size distribution and the pore size is hard to control. Here we prepared a porous polymer membrane with uniform pore size via spraying a blend of polystyrene (PS) and polyethylene oxide (PEO) on a filtration paper. Dissolving the water-soluble component (PEO) forms the pore and varying the ratios of PEO in the blend controls the pore size. The pore size and size distribution are also affected by processing parameters, such as the flow rate of solution and carrier gas, and gap length. The morphologies of the membrane are observed using scanning electron microscopy (SEM). The novel polymer membrane with controllable and uniform pore size will be used for the separation of solutes with predictable sizes.

scholarly journals Preparation of a functional nanofibrous polymer membrane incorporated with poly(2-aminothio phenol) stabilized gold nanoparticles

Gold Bulletin ◽  
2011 ◽  
Vol 44 (1) ◽  
pp. 37-42 ◽  
Author(s):  
Komathi Shanmugasundaram ◽  
Palaniappan Subramanian ◽  
Manisankar Paramasivam ◽  
Gopalan Anantha Iyengar ◽  
Kwang-Pill Lee
Keyword(s):  
Gold Nanoparticles ◽  
Polymer Membrane

Preparation of Poly(Acrylic Acid) Crosslinked-Gold Nanoparticles for Colorimetric Detection of Analytes

2019 ◽  
Vol 950 ◽  
pp. 138-143
Author(s):  
Erindyah Retno Wikantyasning ◽  
Mutmainnah Mutmainnah ◽  
Ghiyats Ramadhan ◽  
Zakky Cholisoh ◽  
Muhammad Da'i
Keyword(s):  
Gold Nanoparticles ◽  
Herbal Medicine ◽  
Acrylic Acid ◽  
Color Change ◽  
Colorimetric Detection ◽  
Ph Responsive ◽  
Herbal Medicine Product ◽  
Responsive Polymer ◽  
Medicine Product ◽  
Poly Acrylic Acid

The aims of this study are to synthesize and characterize gold nanoparticles (AuNPs) crosslinked by pH-responsive polymer poly (acrylic acid) (PAA) and its application for detection of some analytes in herbal medicine product. In this study, a pH-responsive polymer, poly (acrylic acid) was prepared by the reversible addition-fragmentation chain transfer (RAFT) polymerization method. The polymer was then cross-linked by gold nanoparticles, which was synthesized by the Turkevich method. The response of the AuNPs-crosslinked PAA was observed by the color change from red to blue at a specific pH (4-5) and was characterized by TEM. The reversible color change was resulted from aggregation and disaggregation of the AuNPs due to the shrinking and swelling of the polymer when different pH was introduced as a stimulant. This sensor has the capability of recognizing analytes such as aspirin and tolbutamide added in the herbal medicine product at the concentration of 0.04-0.05 M.

Confined Stimuli-Responsive Polymer Gel in Inverse Opal Polymer Membrane for Colorimetric Glucose Sensor

Langmuir ◽  
2009 ◽  
Vol 25 (14) ◽  
pp. 8349-8356 ◽  
Author(s):  
Masaki Honda ◽  
Kazunori Kataoka ◽  
Takahiro Seki ◽  
Yukikazu Takeoka
Keyword(s):  
Glucose Sensor ◽  
Polymer Membrane ◽  
Inverse Opal ◽  
Polymer Gel ◽  
Stimuli Responsive ◽  
Responsive Polymer ◽  
Stimuli Responsive Polymer

Dispersed gold nanoparticles supported in the pores of flower-like macrocellular siliceous foams based on an ionic liquid as catalysts for reduction

RSC Advances ◽  
2016 ◽  
Vol 6 (54) ◽  
pp. 48757-48766 ◽  
Author(s):  
Shuo Zhao ◽  
Yiwei Zhang ◽  
Yuming Zhou ◽  
Chao Zhang ◽  
Xiaoli Sheng ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Ionic Liquid ◽  
Pore Size ◽  
Protic Ionic Liquid ◽  
Acidic Conditions ◽  
Dispersed Gold ◽  
Uniform Pore Size

A facile method has been developed for the synthesis of a flower-like macrocellular siliceous foam with a large and uniform pore size, using P123 and protic ionic liquid as the co-templates under acidic conditions.

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