4.3 Article

Electrospun fiber mats from poly(alloocimene-b-isobutylene-b-alloocimene) thermoplastic elastomer

Publisher

TAYLOR & FRANCIS AS
DOI: 10.1080/00914037.2018.1563083

Keywords

Cytotoxicity; electrospinning; electron microscopy; mechanical properties; thermoplastic elastomer; XPS

Funding

  1. National Science Foundation [IIP-1434014]
  2. Hungarian-American Enterprise Scholarship Fund (HAESF)

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A new polyisobutylene-based thermoplastic elastomer, poly(alloocimene-b-isobutylene-b-alloocimene triblock copolymer was synthesized by carbocationic polymerization, then electrospun into free-standing rubbery fiber mats by adding 20 wt%. poly(ethylene glycol) to the solution. Although AIBA is a highly hydrophobic material that is non-polar and therefore has high electric resistivity, fiber mats were still successfully obtained. We found that poly(ethylene glycol) was fully embedded into the electrospun fibers. The tensile strength measured on microdumbbells was 2.7 MPa at 537% elongation that is comparable to that of soft human tissues. These rubbery fiber mats were found to be hydrophobic and cell culture studies showed their non-cytotoxicity. Based on these favorable properties, these fiber mats show a great promise for tissue scaffold and drug delivery applications.

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