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Mechanically strong and highly stiff supramolecular polymer composites repairable at ambient conditions

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dc.contributor.authorZhu, J.
dc.contributor.authorChen, G.Y.
dc.contributor.authorYu, L.
dc.contributor.authorXu, H.
dc.contributor.authorLiu, X.
dc.contributor.authorSun, J.
dc.date.issued2020
dc.descriptionData source: Supporting information, https://doi.org/10.31635/ccschem.020.201900118
dc.description.abstractIt is a formidable challenge to fabricate healable polymeric materials with high mechanical strength and stiffness due to the highly suppressed diffusion of their polymer chains. Herein, a high-strength, highly stiff, and repairable/healable supramolecular polymer composite was fabricated by complexing poly(acrylic acid) (PAA) and poly(allylamine hydrochloride) (PAH) in aqueous solutions, followed by molding into desired shapes. Exquisitely tuning the electrostatic and H-bonding interactions between PAA and PAH led to associative phase-separation and in situ formation of nanostructures in the resultant PAA–PAH composites. The H-bonded assembly of PAA–PAH complexes existed as nanospheres were dispersed homogeneously in the continuous phase as an electrostatic assembly of PAA–PAH complexes. Such a structural feature endowed the PAA–PAH copolymer with a double-cross-linked structure, enabling significant reinforcement of the material. The PAA–PAH composites exhibited a tensile strength and an elastic modulus as high as ∼ 67 MPa and ∼ 2.0 GPa, respectively. Due to the benefits from the reconstruction of the complexes, such as reversible electrostatic interactions and H-bonds between PAA and PAH, the PAA–PAH composite could be repaired/healed readily under ambient conditions (25 °C, 40% humidity) by using the liquid-like form of the PAA–PAH complexes (i.e., coacervate). The healing strategy reported here provides a supplementary method for easy repair or healing of high-strength and stiff supramolecular polymer materials.
dc.identifier.citationCCS Chemistry, 2020; 2(4):280-292
dc.identifier.doi10.31635/ccschem.020.201900118
dc.identifier.issn2096-5745
dc.identifier.issn2096-5745
dc.identifier.orcidXu, H. [0000-0002-9126-1593]
dc.identifier.urihttps://hdl.handle.net/11541.2/141979
dc.language.isoen
dc.publisherChinese Chemical Society
dc.rightsCopyright 2020 Chinese Chemical Society Access Condition Notes: CCS Chemistry is a Diamond Open Access journal, meaning that it is fully open access and has no fees for authors whose articles are accepted in the journal
dc.source.urihttps://doi.org/10.31635/ccschem.020.201900118
dc.subjecthealable polymeric materials
dc.subjectpolymer
dc.titleMechanically strong and highly stiff supramolecular polymer composites repairable at ambient conditions
dc.typeJournal article
pubs.publication-statusPublished
ror.fileinfo12203168440001831 13203168430001831 ccschem.020.201900118 (1)
ror.mmsid9916383780101831

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