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Developing a UV-Curable, Environmentally Benign and Degradable Elastomer for Soft Robotics

Published online by Cambridge University Press:  31 January 2018

Jacob Rueben ,
Stephanie Walker ,
Stephen Huhn ,
John Simonsen  and
Yiğit Mengüç
Jacob Rueben
Affiliation:
Oregon State University, 204 Rogers Hall, Corvallis, OR97331, U.S.A.
Stephanie Walker*
Affiliation:
Oregon State University, 204 Rogers Hall, Corvallis, OR97331, U.S.A.
Stephen Huhn
Affiliation:
Oregon State University, 204 Rogers Hall, Corvallis, OR97331, U.S.A.
John Simonsen
Affiliation:
Oregon State University, 204 Rogers Hall, Corvallis, OR97331, U.S.A.
Yiğit Mengüç
Affiliation:
Oregon State University, 204 Rogers Hall, Corvallis, OR97331, U.S.A.
*
†(Email: [email protected])
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Abstract

This paper introduces preliminary work on a UV-curable, environmentally benign and degradable elastomer, poly(glycerol sebacate itaconate), or PGSI, for use in soft robotics. A one-pot, solvent-free synthesis route using safe and inexpensive chemical reagents was developed to enable easy adoption into soft robotics labs. Material characterization of non-aged PGSI samples gave: ultimate tensile strength (UTS) ranging from 134 to 193 kPa with moduli ranging from 57 to 131 kPa and elongations at break ranging from 105 to 137 % (12 samples from 6 batches tested), and resilience values ranging from 73 to 82 % (3 samples from 3 batches tested). FTIR analysis showed a possible decrease in carbon-carbon double bonds after UV curing, evidencing a decrease in itaconic acid methylene groups from photoinitiated free radical cross-linking. NMR on the pre-polymer suggested incorporation of itaconic acid into the main polymer chain and evidence of heterogeneity of the polymer backbone resulting from glycerol bonding. An example molded soft pocket pneumatic actuator is created and briefly characterized. With further development, PGSI can be a degradable material to incorporate into temporary soft robots.

Keywords

polymerelastic propertieschemical reaction
Type
Articles
Information
MRS Advances , Volume 3 , Issue 27: Biomaterials and Soft Materials , 2018 , pp. 1551 - 1556
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Copyright
Copyright © Materials Research Society 2018 

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Footnotes

*

authors did equal work

References

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