Research

19 pages, 8161 KiB

Open AccessArticle

Polyurethane-Based Porous Carbons Suitable for Medical Application

by Andrzej S. Swinarew, Tomasz Flak, Agnieszka Jarosińska, Żaneta Garczyk, Jadwiga Gabor, Szymon Skoczyński, Grzegorz Brożek, Jarosław Paluch, Magdalena Popczyk, Arkadiusz Stanula and Sebastian Stach

Materials 2022, 15(9), 3313; https://0-doi-org.brum.beds.ac.uk/10.3390/ma15093313 - 05 May 2022

Cited by 1 | Viewed by 1342

Abstract

The main aim of the study was to synthesize and analyze spectral data to determine the structure and stereometry of the carbon-based porous material internal structure. Samples of a porous biomaterial were synthesized through anionic polymerization following our own patent and then carbonized. [...] Read more.

The main aim of the study was to synthesize and analyze spectral data to determine the structure and stereometry of the carbon-based porous material internal structure. Samples of a porous biomaterial were synthesized through anionic polymerization following our own patent and then carbonized. The samples were investigated using MALDI ToF MS, FTIR ATR spectroscopy, optic microscopy, SEM, confocal laser scanning microscopy and CMT imaging. The analysis revealed the chemical and stereological structure of the obtained porous biomaterial. Then, the parameters characterizing the pore geometry and the porosity of the samples were calculated. The developed material can be used to collect adsorption of breathing phase samples to determine the parity composition of exhaled air. Full article

(This article belongs to the Special Issue Advanced Porous Polymers: Synthesis, Characterisations and Applications)

► Show Figures

Figure 1

13 pages, 2772 KiB

Open AccessArticle

Carbon Nanotubes and Polydopamine Modified Poly(dimethylsiloxane) Sponges for Efficient Oil–Water Separation

by Wen Zhang, Juanjuan Wang, Xue Han, Lele Li, Enping Liu and Conghua Lu

Materials 2021, 14(9), 2431; https://0-doi-org.brum.beds.ac.uk/10.3390/ma14092431 - 07 May 2021

Cited by 16 | Viewed by 2573

Abstract

In this paper, effective separation of oil from both immiscible oil–water mixtures and oil-in-water (O/W) emulsions are achieved by using poly(dimethylsiloxane)-based (PDMS-based) composite sponges. A modified hard template method using citric acid monohydrate as the hard template and dissolving it in ethanol is [...] Read more.

In this paper, effective separation of oil from both immiscible oil–water mixtures and oil-in-water (O/W) emulsions are achieved by using poly(dimethylsiloxane)-based (PDMS-based) composite sponges. A modified hard template method using citric acid monohydrate as the hard template and dissolving it in ethanol is proposed to prepare PDMS sponge composited with carbon nanotubes (CNTs) both in the matrix and the surface. The introduction of CNTs endows the composite sponge with enhanced comprehensive properties including hydrophobicity, absorption capacity, and mechanical strength than the pure PDMS. We demonstrate the successful application of CNT-PDMS composite in efficient removal of oil from immiscible oil–water mixtures within not only a bath absorption, but also continuous separation for both static and turbulent flow conditions. This notable characteristic of the CNT-PDMS sponge enables it as a potential candidate for large-scale industrial oil–water separation. Furthermore, a polydopamine (PDA) modified CNT-PDMS is developed here, which firstly realizes the separation of O/W emulsion without continuous squeezing of the sponge. The combined superhydrophilic and superoleophilic property of PDA/CNT-PDMS is assumed to be critical in the spontaneously demulsification process. Full article

(This article belongs to the Special Issue Advanced Porous Polymers: Synthesis, Characterisations and Applications)

► Show Figures

Graphical abstract

13 pages, 3319 KiB

Open AccessEditor’s ChoiceArticle

A Pressure Swing Approach to Selective CO₂ Sequestration Using Functionalized Hypercrosslinked Polymers

by Alex M. James, Jake Reynolds, Daniel G. Reed, Peter Styring and Robert Dawson

Materials 2021, 14(7), 1605; https://0-doi-org.brum.beds.ac.uk/10.3390/ma14071605 - 25 Mar 2021

Cited by 3 | Viewed by 2694

Abstract

Functionalized hypercrosslinked polymers (HCPs) with surface areas between 213 and 1124 m²/g based on a range of monomers containing different chemical moieties were evaluated for CO₂ capture using a pressure swing adsorption (PSA) methodology under humid conditions and elevated temperatures. [...] Read more.

Functionalized hypercrosslinked polymers (HCPs) with surface areas between 213 and 1124 m²/g based on a range of monomers containing different chemical moieties were evaluated for CO₂ capture using a pressure swing adsorption (PSA) methodology under humid conditions and elevated temperatures. The networks demonstrated rapid CO₂ uptake reaching maximum uptakes in under 60 s. The most promising networks demonstrating the best selectivity and highest uptakes were applied to a pressure swing setup using simulated flue gas streams. The carbazole, triphenylmethanol and triphenylamine networks were found to be capable of converting a dilute CO₂ stream (>20%) into a concentrated stream (>85%) after only two pressure swing cycles from 20 bar (adsorption) to 1 bar (desorption). This work demonstrates the ease with which readily synthesized functional porous materials can be successfully applied to a pressure swing methodology and used to separate CO₂ from N₂ from industrially applicable simulated gas streams under more realistic conditions. Full article

(This article belongs to the Special Issue Advanced Porous Polymers: Synthesis, Characterisations and Applications)

► Show Figures

Figure 1

Journal Menu

Journal Browser

Advanced Porous Polymers: Synthesis, Characterisations and Applications

Share This Special Issue

Special Issue Editor

Special Issue Information

Keywords

Published Papers (3 papers)

Research

Further Information

Guidelines

MDPI Initiatives

Follow MDPI