Characterizations of PDMS-graft copolyimide membrane and the permselectivity of gases and aqueous organic mixtures

Yun, Cheol Min; Akiyama, Eiichi; Yamanobe, Takeshi; Uehara, Hiroki; Yu, Na

doi:10.1016/j.polymer.2016.09.044

Cited by 13 publications

(10 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, high gas permeability caused by the continuous phase of the PDMS flexible domain, along with improved pervaporation when it requires efficient removal of VOCs from aqueous mixtures, was verified. PDMS-grafted copolymer membranes showed efficiency in removing toxic organic components from wastewater due to an improved pervaporation technique [ 120 ]. Additionally, another pervaporation membrane composed of SiO 2 /PDMS/PVDF was manufactured by the dynamic negative pressure method and showed a significant improvement of more than 40% in the contact angle with the surface compared to the PVDF membrane alone.…”

Section: Pdms Compositesmentioning

confidence: 99%

Polydimethylsiloxane Composites Characterization and Its Applications: A Review

et al. 2021

View full text Add to dashboard Cite

Polydimethylsiloxane (PDMS) is one of the most promising elastomers due its remarkable proprieties such as good thermal stability, biocompatibility, corrosion resistance, flexibility, low cost, ease of use, chemically inertia, hyperplastic characteristics, and gas permeability. Thus, it can be used in areas such as microfluidic systems, biomedical devices, electronic components, membranes for filtering and pervaporation, sensors, and coatings. Although pure PDMS has low mechanical properties, such as low modulus of elasticity and strength, it can be improved by mixing the PDMS with other polymers and by adding particles or reinforcements. Fiber-reinforced PDMS has proved to be a good alternative to manufacturing flexible displays, batteries, wearable devices, tactile sensors, and energy harvesting systems. PDMS and particulates are often used in the separation of liquids from wastewater by means of porosity followed by hydrophobicity. Waxes such as beeswax and paraffin have proved to be materials capable of improving properties such as the hydrophobic, corrosion-resistant, thermal, and optical properties of PDMS. Finally, when blended with polymers such as poly (vinyl chloride-co-vinyl acetate), PDMS becomes a highly efficient alternative for membrane separation applications. However, to the best of our knowledge there are few works dedicated to the review and comparison of different PDMS composites. Hence, this review will be focused on PDMS composites, their respective applications, and properties. Generally, the combination of elastomer with fibers, particles, waxes, polymers, and others it will be discussed, with the aim of producing a review that demonstrates the wide applications of this material and how tailored characteristics can be reached for custom applications.

show abstract

Section: Pdms Compositesmentioning

confidence: 99%

Polydimethylsiloxane Composites Characterization and Its Applications: A Review

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Among polymers, there is an increasing interest in the study of polydimethylsiloxane (PDMS) for applications such as mechanical and civil engineering, electronic devices, and in biomedical fields [2][3][4][5][6][7]. Within these areas, applications were reported such as water/oil and gas filtration membranes [8][9][10], sensors [11][12][13], lubricants [14], sealing agents [15], blood analogues [16][17][18], and also for microfluidic devices [19][20][21][22][23]. Recently, there has been a significant growing interest in microelectromechanical systems (MEMS) and microfluidic and optical devices [24].…”

Section: Introductionmentioning

confidence: 99%

Composite Material of PDMS with Interchangeable Transmittance: Study of Optical, Mechanical Properties and Wettability

et al. 2021

View full text Add to dashboard Cite

Polydimethylsiloxane (PDMS) is a polymer that has attracted the attention of researchers due to its unique properties such as transparency, biocompatibility, high flexibility, and physical and chemical stability. In addition, PDMS modification and combination with other materials can expand its range of applications. For instance, the ability to perform superhydrophobic coating allows for the manufacture of lenses. However, many of these processes are complex and expensive. One of the most promising modifications, which consists of the development of an interchangeable coating, capable of changing its optical characteristics according to some stimuli, has been underexplored. Thus, we report an experimental study of the mechanical and optical properties and wettability of pure PDMS and of two PDMS composites with the addition of 1% paraffin or beeswax using a gravity casting process. The composites’ tensile strength and hardness were lower when compared with pure PDMS. However, the contact angle was increased, reaching the highest values when using the paraffin additive. Additionally, these composites have shown interesting results for the spectrophotometry tests, i.e., the material changed its optical characteristics when heated, going from opaque at room temperature to transparent, with transmittance around 75%, at 70 °C. As a result, these materials have great potential for use in smart devices, such as sensors, due to its ability to change its transparency at high temperatures.

show abstract

“…It was observed that all of these membranes exhibited perm-selectivity toward ethanol as well as the other organics along with stable and incredibly high permeability. In particular, the PIS19 offered the best PV performance with the moderate separation factor of around 9.5 and the very advantageous permeation flux of 5720 g·m −2 ·h −1 which was at least more than sixfold that of PDMS alone [ 119 ].…”

Section: Membrane Materials For Ethanol Recoverymentioning

confidence: 99%

Membranes for bioethanol production by pervaporation

Peng

Lan

Liang

et al. 2021

Biotechnol Biofuels

View full text Add to dashboard Cite

Background Bioethanol as a renewable energy resource plays an important role in alleviating energy crisis and environmental protection. Pervaporation has achieved increasing attention because of its potential to be a useful way to separate ethanol from the biomass fermentation process. Results This overview of ethanol separation via pervaporation primarily concentrates on transport mechanisms, fabrication methods, and membrane materials. The research and development of polymeric, inorganic, and mixed matrix membranes are reviewed from the perspective of membrane materials as well as modification methods. The recovery performance of the existing pervaporation membranes for ethanol solutions is compared, and the approaches to further improve the pervaporation performance are also discussed. Conclusions Overall, exploring the possibility and limitation of the separation performance of PV membranes for ethanol extraction is a long-standing topic. Collectively, the quest is to break the trade-off between membrane permeability and selectivity. Based on the facilitated transport mechanism, further exploration of ethanol-selective membranes may focus on constructing a well-designed microstructure, providing active sites for facilitating the fast transport of ethanol molecules, hence achieving both high selectivity and permeability simultaneously. Finally, it is expected that more and more successful research could be realized into commercial products and this separation process will be deployed in industrial practices in the near future. Graphical abstract

show abstract

Characterizations of PDMS-graft copolyimide membrane and the permselectivity of gases and aqueous organic mixtures

Cited by 13 publications

References 29 publications

Polydimethylsiloxane Composites Characterization and Its Applications: A Review

Polydimethylsiloxane Composites Characterization and Its Applications: A Review

Composite Material of PDMS with Interchangeable Transmittance: Study of Optical, Mechanical Properties and Wettability

Membranes for bioethanol production by pervaporation

Contact Info

Product

Resources

About