TY - JOUR
T1 - A modular strategy for functional pressure sensitive adhesives
AU - Lee, Kyueui
AU - Tiu, Brylee David B.
AU - Martchenko, Valentin
AU - Mai, Kristene
AU - Lee, Goun
AU - Gerst, Matthias
AU - Messersmith, Phillip B.
N1 - Publisher Copyright:
©
PY - 2021/1/20
Y1 - 2021/1/20
N2 - A modular approach to synthesizing functional pressure sensitive adhesives (PSAs) was introduced, wherein a modifiable acrylic PSA copolymer was synthesized by copolymerizing common PSA monomers with 6 mol % glycidyl methacrylate, allowing for subsequent functional group modification via the pendant epoxide functionality. This postmodification technique has the advantage of allowing the installation of a variety of functional groups relevant to adhesion, without variation of molecular weight. Because comparisons of cohesive and adhesive performance of candidate PSAs can be complicated by molecular weight differences, this strategy simplifies direct comparisons of the effects of functional groups on performance. As a proof of concept, a mussel-inspired catecholic PSA was synthesized by postreaction of the epoxide scaffold polymer with a thiol-modified catechol, allowing the effect of catechol on underlying structure-property relationships to be determined without variation in molecular weight. The mechanical performance of catecholic PSA was compared to relevant control PSAs by using industry-standard 180° peel and static shear tests, revealing an increase in peel strength achieved through catechol modification. Moreover, we observed an unexpected enhancement in PSA cohesive strength attributed to oxidation of catechol, which cannot be attributed to differences in molecular weight, a common source of changes in PSA cohesive strength.
AB - A modular approach to synthesizing functional pressure sensitive adhesives (PSAs) was introduced, wherein a modifiable acrylic PSA copolymer was synthesized by copolymerizing common PSA monomers with 6 mol % glycidyl methacrylate, allowing for subsequent functional group modification via the pendant epoxide functionality. This postmodification technique has the advantage of allowing the installation of a variety of functional groups relevant to adhesion, without variation of molecular weight. Because comparisons of cohesive and adhesive performance of candidate PSAs can be complicated by molecular weight differences, this strategy simplifies direct comparisons of the effects of functional groups on performance. As a proof of concept, a mussel-inspired catecholic PSA was synthesized by postreaction of the epoxide scaffold polymer with a thiol-modified catechol, allowing the effect of catechol on underlying structure-property relationships to be determined without variation in molecular weight. The mechanical performance of catecholic PSA was compared to relevant control PSAs by using industry-standard 180° peel and static shear tests, revealing an increase in peel strength achieved through catechol modification. Moreover, we observed an unexpected enhancement in PSA cohesive strength attributed to oxidation of catechol, which cannot be attributed to differences in molecular weight, a common source of changes in PSA cohesive strength.
KW - adhesion
KW - adhesive
KW - bio-inspired material
KW - cohesion
KW - modular approach
UR - http://www.scopus.com/inward/record.url?scp=85099647977&partnerID=8YFLogxK
U2 - 10.1021/acsami.0c19405
DO - 10.1021/acsami.0c19405
M3 - Article
C2 - 33401911
AN - SCOPUS:85099647977
SN - 1944-8244
VL - 13
SP - 3161
EP - 3165
JO - ACS applied materials & interfaces
JF - ACS applied materials & interfaces
IS - 2
ER -