Investigation of the formation characteristics of polyaniline and its application in forming free-standing pressure filtration membranes

Yusoff, Izzati Izni; Rohani, Rosiah; Mohammad, Abdul Wahab

doi:10.1007/s10965-016-1068-4

Cited by 11 publications

(13 citation statements)

References 52 publications

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“…This shifting was due to the change in the electronic band after protonation had taken place to cause charge delocalization as shown in Fig. a and as previously reported by . Meanwhile, the other peaks were still intact with the same intensity and size after undergoing the doping process.…”

Section: Resultssupporting

confidence: 79%

“…On top of that, the polymer concentration for the PANI/PI19 membrane was lower than pure PI membrane which also influenced the permeability of the membrane. The influence of the concentration of the doped solution on the porosity and permeability of the membranes was studied previously by other researchers and found the same trend, where the concentration of the doped polymer was inversely proportional to the porosity and permeability of the membrane.…”

Section: Resultssupporting

confidence: 68%

“…Extensive research works have been carried out to develop NF/UF membranes that can be used to fulfill the above separations . Although commercial polymeric membranes are readily available in the market such as cellulose acetates, polyethersulfones, polysulfones, and polyacrylonitrile, but these membranes usually have fixed physico‐chemical properties which limit any separation to the fixed selectivity of their constituents . Amongst the new generation of intrinsic conducting polymer membranes, polyaniline (PANI) has captured the intense attention of the scientific community as one of the promising alternative candidates to commercial membranes .…”

Section: Introductionmentioning

confidence: 99%

“…Previously, many researches were conducted to develop a stable and useful PANI membrane for UF and NF pressure filtrations . These research works were mainly focused on the membrane synthesis, characterization, and the effects of doping/de‐doping on the PANI membrane properties.…”

Section: Introductionmentioning

confidence: 99%

“…Unfortunately, the poor mechanical strength encountered by recent reported works has limited the application of PANI membranes [28][29][30]. From our previous study on free-standing and nonwoven supported PANI membranes, all the fabricated membranes displayed good filtration properties [15]. However, the membranes were found to be brittle after a long period of storage especially the HCl-doped PANI membrane.…”

Section: Introductionmentioning

confidence: 99%

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Durable pressure filtration membranes based on polyaniline–polyimide P84 blends

Yusoff

Rohani

Zaman

et al. 2018

Polymer Engineering & Sci

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A pressure filtration membrane from conducting polymer polyaniline (PANI) is known to possess low mechanical strength and thermal stability. Therefore, it is believed that the properties of the membrane can be enhanced by blending PANI with a conventional polymer like polyimide (PI), which possesses high mechanical strength and thermal stability. A thermal analysis revealed that polymer chain of blend membranes started to break beyond the melting temperature of pure PANI membrane indicating that the addition of PI hindered the degradation of PANI and thus slowed down the decomposition process. Mechanical tests further showed that PANI/PI membrane had a tensile strength that was 60% higher than pure PANI membrane. Furthermore, the surface hydrophilicity and negativity of the blend membrane increased as it was doped in acid, thereby reflecting the exploitation of advantages of both polymers. Rejection at various molecular ranges of PEGs showed that PANI/PI membrane was initially in the ultrafiltration (UF) range, but later fell into the nanofiltration (NF) range when an acid dopant was introduced to the membrane. According to the long‐term filtration performance, the PANI/PI membrane was able to sustain a rejection of up to 99% in Congo red solution with just a slight reduction in flux. POLYM. ENG. SCI., 59:E82–E92, 2019. © 2018 Society of Plastics Engineers

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Section: Resultssupporting

confidence: 79%

Section: Resultssupporting

confidence: 68%