(718g) Super-Stretchable Polymeric Elastomers with Healable Mechanical Property and Recoverable Gas-Separation Functionality

Authors: 
Cao, P., Oak Ridge National Laboratory
Li, B., Oak Ridge National Laboratory
Hong, T., University of Tennessee
Qiang, Z., Northwestern University
Vogiatzis, K., University of Minnesota
Sokolov, A., Oak Ridge National Laboratory
Saito, T., Oak Ridge National Laboratory

Super-Stretchable Polymeric Elastomers with Healable Mechanical Property and Recoverable Gas-separation Functionality

Peng-Fei Cao,*
a
Bingrui Li, † a Tao Hong,b
Jacob Townsend,b Zhe
Qiang,c Kunyue Xing,b 
Konstantinos D. Vogiatzis,b Yangyang Wang,d Alexei
P. Sokolov,a,b and Tomonori Saito* a

a Chemical Sciences Division, d Center
for Nanophase Materials Sciences,

Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, United
States

b Department of Chemistry, University of
Tennessee,

Knoxville, Tennessee 37996, United States

c Department of Chemical and Biological
Engineering, Northwestern University,

Evanston, IL 60208

Polymeric elastomers with
the capability to self-heal and recover the functionalities
after
mechanical damage are intriguing materials for a wide range of applications.
Herein, we report a series of urea functionalized poly(dimethyl
siloxane)-based elastomers (U-PDMS-Es) with extremely high stretchability,
self-healing property and recoverable gas-separation performance. Tailoring the
molecular weights of PDMS offers tunable mechanical properties of obtained
U-PDMS-Es, such as elongation (from 984% to 5,600%), Young’s modulus, ultimate
tensile strength and toughness. The U-PDMS-Es can also serve as excellent
acoustic and vibration damping materials over a broad range of temperature
(over 100 °C). After mechanical damage, the U-PDMS-Es can be healed in 60 mins
at ambient temperature or in 20 mins at 40 °C with completely restored
mechanical performance. The U-PDMS-Es were also demonstrated as recoverable
gas-separation functionality with retained permeability/selectivity after the
damage for the first time.