(32a) Dual-Responsive Microgels for Morphological and Functional Repair of Nonwovens | AIChE

(32a) Dual-Responsive Microgels for Morphological and Functional Repair of Nonwovens


Ramesh, S. - Presenter, North Carolina State University
Davis, J., NCSU
Menegatti, S., North Carolina State University
Genzer, J., NC State University
Khan, S. A., North Carolina State University
Roros, A., North Carolina State University
Eiben, J., North Carolina State University
Fabiani, T., Università di Bologna
Smith, R., North Carolina State University
Reynolds, L., North Carolina State University
Pourdeyhimi, B., North Carolina State University
Fabric repair has been based on functionalizing self-healing elements in the fiber matrix to initiate repair in the event of damage. Most of the current work discusses repair at the micro-scale (µm) with a limited number of technologies repairing damages in the meso- (µm – mm) and macro-scale (> mm). As a new paradigm in fabric repair, we propose and demonstrate a dual-responsive microgel colloidal suspension as a substrate-agnostic repair method for morphological and functional repair of nonwoven fibermats (NWFs). The formulation comprises of magneto-responsive poly(N-isopropylacrylamide-co-acrylic acid) (PNIPAm-co-AA) microgels acting as “bricks” and poly(N-isopropylacrylamide-co-N-4-benzoylphenyl acrylamide) (PNIPAm-co-BPAm) serving as photo-cross-linkable “mortar”. We compare the efficiency of the magnetic-controlled repair with repair using non-magnetic photo-cross-linkable microgels. The spatially controlled application and repair are rapid, require a minimal volume of material to repair and, efficiently recover the morphology, permeability, tensile modulus of damaged polypropylene, and polybutylene terephthalate NWFs.