Application prospects of dense gas separation hollow fibers based on poly(4-methyl-1-pentene)

Markova, Svetlana; Shalygin, M. G.; Pelzer, Martin; Gries, Thomas; Teplyakov, V. V.

doi:10.1007/s11696-019-01043-x

Cited by 6 publications

(3 citation statements)

References 17 publications

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“…On the other side, PMP is commercially available as hollow fibers (HFs) used in gas separation membranes, where the gas permeability derived from its molecular microstructure. As it was reported recently, the transport and separation performance of these HFs improved by PMP's crystallinity increment [20].…”

Section: α-Olefin (Co)polymerssupporting

confidence: 55%

Extending Alkenes’ Value Chain to Functionalized Polyolefins

Balzade¹,

Sharif²,

Anbaran³

2021

Alkenes - Recent Advances, New Perspectives and Applications

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Naphtha is one of the crude oil distillation products, bringing almost the lowest value-addition to crude oil, compared to other refinery products such as liquid petroleum gas, gasoline, and diesel. However, Naphtha can be converted to one of the highest value products at the end of the value chain, i.e., polyolefins. Although the production of conventional commodity polyolefins from crude oil, is considered as one of the final products in alkenes’ value chain, there are specialty polyolefins with higher values. Specialty polyolefins are small volume, high-performance thermoplastics with high-profit margins compared to traditional commodity polyolefins. Recently, some special purpose functionalized polyolefins have been developed as efficient substituents for high-performance engineering thermoplastics. Polyolefins are exploited as cost-effective platforms to produce these functionalized thermoplastics. They are promising candidates for replacing high-performance polymers with high-cost raw materials and elaborate production processes. So, functional polyolefins have introduced a new paradigm in the production of high-performance thermoplastics, extending the alkenes’ value chain and increasing profitability. High-performance specialty polyolefins may find exceptional markets in niche applications. In this chapter, the commercial specialty and functional polyolefins’ current situation and prospects are reviewed.

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Section: α-Olefin (Co)polymerssupporting

confidence: 55%

Extending Alkenes’ Value Chain to Functionalized Polyolefins

Balzade¹,

Sharif²,

Anbaran³

2021

Alkenes - Recent Advances, New Perspectives and Applications

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“…Membranes 2021, 11, 622 16 of 17 (2) The fitting method of the spinodal curve: In the Flory-Huggins theory, the spinodal curve should satisfy:…”

Section: Conflicts Of Interestmentioning

confidence: 99%

“…Poly(4-methyl-1-pentene) (PMP) is a semi-crystalline polyolefin that has several interesting properties, such as high thermal stability, good chemical resistance, excellent gas permeability, and biosecurity [ 1 ]. It is of practical importance as a membrane-making polymer, and the PMP membranes are found to serve in many practical applications, such as gas separation [ 2 ] and some essential membrane materials applied in medical science, especially in extracorporeal membrane oxygenation (ECMO) systems [ 3 , 4 ], which are extracorporeal devices providing prolonged cardiac and respiratory support to persons whose heart and lungs are unable to provide an adequate amount of gas exchange or perfusion to sustain life [ 5 ]. At present, the PMP membranes applied in the ECMO systems are mainly prepared via thermally induced phase separation (TIPS) [ 6 , 7 ], since the TIPS process has better controllability in the membrane preparation and excellent membrane performances such as high porosity and good mechanical property can be easily attained.…”

Section: Introductionmentioning

confidence: 99%

A Novel Green Diluent for the Preparation of Poly(4-methyl-1-pentene) Membranes via a Thermally-Induced Phase Separation Method

Tang

Lin

et al. 2021

Membranes

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The use of green solvents satisfies safer chemical engineering practices and environmental security. Herein, myristic acid (MA)—a green diluent—was selected to prepare poly- (4-methyl-1-pentene) (PMP) membranes with bicontinuous porous structure via a thermally induced phase separation (TIPS) process to maintain a high gas permeability. Firstly, based on the Hansen solubility parameter ‘distance’, Ra, the effect of four natural fatty acids on the PMP membrane structure was compared and studied to determine the optimal green diluent, MA. The thermodynamic phase diagram of the PMP-MA system was calculated and presented to show that a liquid-liquid phase separation region could be found during the TIPS process and the monotectic point was around 34.89 wt%. Then, the effect of the PMP concentration on the morphologies and crystallization behavior was systematically investigated to determine a proper PMP concentration for the membrane preparation. Finally, PMP hollow fiber (HF) membranes were fabricated with a PMP concentration of 30 wt% for the membrane performance characterization. The resultant PMP HF membranes possessed good performances that the porosity was 70%, the tensile strength was 96 cN, and the nitrogen flux was 8.20 ± 0.10 mL·(bar·cm2·min)−1. We believe that this work can be a beneficial reference for people interested in the preparation of PMP membranes for medical applications.

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