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Compressible and monolithic microporous polymer sponges prepared via one-pot synthesis.

Lim Y, Cha MC, Chang JY - Sci Rep (2015)

Bottom Line: MP-0.8, which was synthesized using a 0.8:1 molar ratio of PBT-Br to TEB, showed microporosity with a BET surface area as high as 463 m(2)g(-1).The polymer was very hydrophobic, with a water contact angle of 145° and absorbed 7-17 times its own weight of organic liquids.The absorbates were released by simple compression, allowing recyclable use of the polymer.

View Article: PubMed Central - PubMed

Affiliation: Department of Materials Science and Engineering, College of Engineering, Seoul National University, Seoul 151-744, South Korea.

ABSTRACT
Compressible and monolithic microporous polymers (MPs) are reported. MPs were prepared as monoliths via a Sonogashira-Hagihara coupling reaction of 1,3,5-triethynylbenzene (TEB) with the bis(bromothiophene) monomer (PBT-Br). The polymers were reversibly compressible, and were easily cut into any form using a knife. Microscopy studies on the MPs revealed that the polymers had tubular microstructures, resembling those often found in marine sponges. Under compression, elastic buckling of the tube bundles was observed using an optical microscope. MP-0.8, which was synthesized using a 0.8:1 molar ratio of PBT-Br to TEB, showed microporosity with a BET surface area as high as 463 m(2)g(-1). The polymer was very hydrophobic, with a water contact angle of 145° and absorbed 7-17 times its own weight of organic liquids. The absorbates were released by simple compression, allowing recyclable use of the polymer. MPs are potential precursors of structured carbon materials; for example, a partially graphitic material was obtained by pyrolysis of MP-0.8, which showed a similar tubular structure to that of MP-0.8.

No MeSH data available.


Related in: MedlinePlus

Reaction scheme for the synthesis of the bis(bromothiophene) monomer (PBT-Br) and microporous polymers (MPs).The polymers were prepared by a Sonogashira-Hagihara coupling reaction.
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f1: Reaction scheme for the synthesis of the bis(bromothiophene) monomer (PBT-Br) and microporous polymers (MPs).The polymers were prepared by a Sonogashira-Hagihara coupling reaction.

Mentions: Compressible MPs were prepared via a Sonogashira–Hagihara coupling reaction of 1,3,5-triethynylbenzene (TEB) with the bis(bromothiophene) monomer (PBT-Br) (Fig. 1)18. PBT-Br was synthesized from a Stille coupling reaction of 1,4-dibromo-2,5-difluorobenzene with 2-(tributylstannyl)thiophene, followed by bromination with N-bromosuccinimide. The polymerization reactions of PBT-Br and TEB were carried out in a mixture of toluene and N,N-dimethylformamide (DMF) (1:1, v/v). The TEB dissolved well in the polymerization medium at room temperature, but the PBT-Br was only slightly soluble. Unless otherwise noted, the polymerization reactions were carried out at 100 °C for 24 h. The monomer feed ratio influenced the resulting polymer morphology. Five polymers were synthesized, MP-0.5, MP-0.8, MP-1.0, MP-1.2, and MP-1.5, which were synthesized by changing the molar ratio between PBT-Br and TEB as 0.5:1, 0.8:1, 1:1, 1.2:1, and 1.5:1, respectively. MP-0.8, MP-1.0, MP-1.2, and MP-1.5 were obtained as monoliths, but MP-0.5 was obtained as a powder.


Compressible and monolithic microporous polymer sponges prepared via one-pot synthesis.

Lim Y, Cha MC, Chang JY - Sci Rep (2015)

Reaction scheme for the synthesis of the bis(bromothiophene) monomer (PBT-Br) and microporous polymers (MPs).The polymers were prepared by a Sonogashira-Hagihara coupling reaction.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4632124&req=5

f1: Reaction scheme for the synthesis of the bis(bromothiophene) monomer (PBT-Br) and microporous polymers (MPs).The polymers were prepared by a Sonogashira-Hagihara coupling reaction.
Mentions: Compressible MPs were prepared via a Sonogashira–Hagihara coupling reaction of 1,3,5-triethynylbenzene (TEB) with the bis(bromothiophene) monomer (PBT-Br) (Fig. 1)18. PBT-Br was synthesized from a Stille coupling reaction of 1,4-dibromo-2,5-difluorobenzene with 2-(tributylstannyl)thiophene, followed by bromination with N-bromosuccinimide. The polymerization reactions of PBT-Br and TEB were carried out in a mixture of toluene and N,N-dimethylformamide (DMF) (1:1, v/v). The TEB dissolved well in the polymerization medium at room temperature, but the PBT-Br was only slightly soluble. Unless otherwise noted, the polymerization reactions were carried out at 100 °C for 24 h. The monomer feed ratio influenced the resulting polymer morphology. Five polymers were synthesized, MP-0.5, MP-0.8, MP-1.0, MP-1.2, and MP-1.5, which were synthesized by changing the molar ratio between PBT-Br and TEB as 0.5:1, 0.8:1, 1:1, 1.2:1, and 1.5:1, respectively. MP-0.8, MP-1.0, MP-1.2, and MP-1.5 were obtained as monoliths, but MP-0.5 was obtained as a powder.

Bottom Line: MP-0.8, which was synthesized using a 0.8:1 molar ratio of PBT-Br to TEB, showed microporosity with a BET surface area as high as 463 m(2)g(-1).The polymer was very hydrophobic, with a water contact angle of 145° and absorbed 7-17 times its own weight of organic liquids.The absorbates were released by simple compression, allowing recyclable use of the polymer.

View Article: PubMed Central - PubMed

Affiliation: Department of Materials Science and Engineering, College of Engineering, Seoul National University, Seoul 151-744, South Korea.

ABSTRACT
Compressible and monolithic microporous polymers (MPs) are reported. MPs were prepared as monoliths via a Sonogashira-Hagihara coupling reaction of 1,3,5-triethynylbenzene (TEB) with the bis(bromothiophene) monomer (PBT-Br). The polymers were reversibly compressible, and were easily cut into any form using a knife. Microscopy studies on the MPs revealed that the polymers had tubular microstructures, resembling those often found in marine sponges. Under compression, elastic buckling of the tube bundles was observed using an optical microscope. MP-0.8, which was synthesized using a 0.8:1 molar ratio of PBT-Br to TEB, showed microporosity with a BET surface area as high as 463 m(2)g(-1). The polymer was very hydrophobic, with a water contact angle of 145° and absorbed 7-17 times its own weight of organic liquids. The absorbates were released by simple compression, allowing recyclable use of the polymer. MPs are potential precursors of structured carbon materials; for example, a partially graphitic material was obtained by pyrolysis of MP-0.8, which showed a similar tubular structure to that of MP-0.8.

No MeSH data available.


Related in: MedlinePlus