Polybenzimidazoles based on 3,3′‐diaminobenzidine and aliphatic dicarboxylic acids: Synthesis and evaluation of physicochemical properties toward their applicability as proton exchange and gas separation membrane material

Bhavsar, Rupesh S.; Nahire, Sandip B.; Kale, Mrunali S.; Patil, Shubhangi G.; Aher, Pradnya P.; Bhavsar, Ritesh; Kharul, Ulhas K.

doi:10.1002/app.33246

Cited by 18 publications

(31 citation statements)

References 36 publications

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“…The synthesis of aliphatic PBI was previously reported by Bhavsar et al However, the reaction conditions needed to be optimized in order to get membrane forming polymers (see Supporting Information). Good results were obtained by polymerizing dodecanedioic acid and diaminobenzidine in PPMA at a monomer concentration of 2.6 wt %.…”

Section: Resultsmentioning

confidence: 99%

“…Poly[(decane‐1,10‐diyl)‐(5,5′‐bibenzimidazole‐2,2′‐diyl)] was synthesized by reaction of 3,3′‐diamonobenzidine with dodecanedioic acid, following the procedure of Bhavsar et al A round bottom flask was filled with 148 g methane sulfonic acid and 14.8 g phosphorous pentoxide at 80 °C and stirred by a mechanical stirrer under an argon stream, until a clear solution was obtained. 2.3016 g of dodecanedioic acid (10 mmol) and 2.1412 g of 3,3'‐diaminobenzidine (10 mmol) were added at this temperature.…”

Section: Methodsmentioning

confidence: 99%

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Anion conducting methylated aliphatic PBI and its calculated properties

Cho

Henkensmeier

Brela

et al. 2016

J Polym Sci B Polym Phys

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A methylated polybenzimidazole with an aliphatic chain in the backbone (Me‐PBI‐C10) was synthesized and formed into membranes. Literature suggests that alkyl chains on C2 of imidazolium ions increase their alkaline stability. While this may be true for model compounds or ions attached as a side chain, both our DFT calculations and experimental results show that Me‐PBI‐C10 does not withstand alkaline conditions. To increase the alkaline stability, blend membranes with PBI‐OO were fabricated. A blend membrane with 50% PBI‐OO showed a chloride conductivity of up to 6 mS/cm, indicating that these membranes could find use in non‐alkaline applications like vanadium redox flow batteries (VRFB). The high mechanical stability (tensile strength: 70.25 ± 14.85 MPa, Young modulus: 1.65 ± 0.16 GPa) would be an advantage over currently used Nafion membranes. Finally, three different models were successfully applied to qualitatively predict the water uptake of Me‐PBI‐C10 exchanged with different anions. The results match with experimental data. © 2016 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2017, 55, 256–265

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Anion conducting methylated aliphatic PBI and its calculated properties

Cho

Henkensmeier

Brela

et al. 2016

J Polym Sci B Polym Phys

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“…7 that, adsorption-desorption behavior of both the materials at higher pressure is different than that at lower pressure, since, saturation was observed in case of PBI-2, whereas PBI-1seemed to have more CO 2 capture capacity if the higher pressures beyond 50 bars is observed. This non-saturable adsorption-desorption performance of PBI-1 at relatively high pressure indicates the capturing capability at very high pressure and further suggest that material is strong enough and flexible (Bhavsar et al 2011) to be utilized in high pressure environment like IGCC. The existence of covalent bonding in the structure of cross-linked PBI (PBI-1) strengthens the material and makes it capable of accommodating high pressure.…”

Section: Co 2 Adsorption: Desorption Measurementsmentioning

confidence: 88%

“…The initial significant weight lost from 30 to 130°C could be associated to the evaporation of water which was stored within the pores of materials. Various types of PBIs with dicarboxylic acids were reported in the literature and almost similar water loss for temperature at around 131°C and similar initial decomposition temperature at around 430°C were reported (Bhavsar et al 2011). The middle and almost smooth weight degradation starting from 130°C and reaches up to 430-450°C is mainly due to burning of some un-reacted hydrocarbons such as CH 2 -group, cross linkers and gaseous products like ammonia and phenol (Iqbal et al 2011;Han et al 2011).…”

Section: Physical Characterizationmentioning

confidence: 91%

Synthesis, characterization and evaluation of porous polybenzimidazole materials for CO2 adsorption at high pressures

et al. 2016

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Porous polybenzimidazole polymers have been under investigation for high and low pressure CO 2 adsorption due to the well-built stability under high pressure and at various temperatures. Pressure swing and temperature swing processes like integrated gasification combined cycle require materials which can operate efficiently at high pressure and high temperature and can remove CO 2 . In this manuscript we report synthesis, characterization and evaluation of two polybenzimidazole materials (PBI-1 and PBI-2), which were prepared with two different solvents and different cross-linking agents by condensation techniques. Low and high pressure CO 2 sorption characteristic of both the materials were evaluated at 273 and 298 K. Thermal gravimetric analysis showed high temperature stability up to 500°C for the studied materials. PBI-1 has shown very good performance by adsorbing 3 times more (1.8025 mmolg -1 of CO 2 ) than PBI-2 at 0°C and at low pressures. Despite low surface area results obtained via BET techniques, at 50 bars PBI-1 adsorbed up to 6.08 mmolg -1 of CO 2 . Studied materials have shown flexible behavior under applied pressure that leads to so-called ''gate-opening'' adsorption behavior and it makes these materials promising adsorbents of CO 2 at high pressures and it is discussed in the manuscript in detail.

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“…Like those polymers that we mentioned above when serving as a membrane material for gas separation its dense membrane has a high selectivity of H 2 over CO 2 but extremely low H 2 permeability. To enhance the gas permeation performance of PBI, many investigations have been carried out to study the effect of N‐substitution …”

Section: Introductionmentioning

confidence: 99%

Gas permeation properties of poly(2,5‐benzimidazole) derivative membranes

Jiang

Xiao

Kang

et al. 2014

J of Applied Polymer Sci

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In this article, three novel polymers based on poly(2,5‐benzimidazole) (ABPBI) were synthesized by introducing propyl, isobutyl or n‐butyl groups to its side chain through an alkyl substitution reaction. FTIR and 13C NMR were applied to confirm the formation of corresponding chemical groups. Their physical properties including crystallinity, thermal stability, mechanical strength, and micro‐morphology were also characterized. Their solubility in common solvents were also tested to see if the modification will bring any improvement. Gas permeation properties of three derivative membranes prepared by a casting and solvent‐evaporation method were tested with pure gases including H2, N2, O2, CH4, and CO2. It has been revealed that gas with a smaller molecular size owned a larger permeability. This means gas permeation in all prepared membranes should be diffusivity selective. Among all three modified ABPBI membranes, isobutyl substitution modified ABPBI (IBABPBI) showed the best selectivity of H2 over other gases such as N2 (∼185) and CO2 (∼6.3) with a comparable permeability (∼9.33 barrer) when tested at 35°C and 3.0 atm. Testing temperature increase facilitated gas permeation for all three membranes obviously; while in term of gas selectivity temperature increase showed diverse alteration because it brought variable impact on gas solubility of different gases. Even so, IBABPBI membrane still owned acceptable selectivity of H2 over N2 (∼118) and CO2 (∼6.3) with an almost doubled permeability (∼17.5 barrer) when tested at 75°C and 3.0 atm. Additional tests showed that running at high pressure did not bring any obvious deterioration to gas separation performance of IBABPBI membrane. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40440.

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Polybenzimidazoles based on 3,3′‐diaminobenzidine and aliphatic dicarboxylic acids: Synthesis and evaluation of physicochemical properties toward their applicability as proton exchange and gas separation membrane material

Cited by 18 publications

References 36 publications

Anion conducting methylated aliphatic PBI and its calculated properties

Anion conducting methylated aliphatic PBI and its calculated properties

Synthesis, characterization and evaluation of porous polybenzimidazole materials for CO2 adsorption at high pressures

Gas permeation properties of poly(2,5‐benzimidazole) derivative membranes

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