posted on 2024-01-06, 14:05authored byZuwu Tang, Xinxing Lin, Meiqiong Yu, Ajoy Kanti Mondal, Hui Wu
Conventional adhesives have poor underwater adhesion
and harm to
human health and the environment during their use, which largely limits
their practical applications. Herein, we synthesized cellulose-based
adhesives with underwater adhesion and biocompatibility by grafting N-(3,4-dihydroxyphenethyl)methacrylamide into the cellulose
chain via atom transfer radical polymerization (ATRP). FTIR, 1H NMR, and XPS analyses ensured the successful preparation
of the cellulose-based adhesive polymers. The different properties
of the prepared adhesives, including swelling ratio, adhesion strength,
and biocompatibility are examined. Results found that the lap shear
strength is enhanced by increasing the catechol content. When catechol
content is 27.2 mol %, cellulose-based adhesive with the addition
of Fe3+ possesses a strong lap shear strength of 2.13 MPa
in a dry environment, 0.10 MPa underwater, and 0.16 MPa under seawater
for iron substrate, respectively. In addition, the cell culture test
demonstrated that the prepared adhesives have outstanding biocompatibility.
The cellulose-based adhesives with underwater adhesion and biocompatibility
have potential applications in biomedicine, electronic engineering,
and construction fields.