Abstract
In this work, we fabricated porphyrin-loaded shape memory polymer (SMP) film by cross-linking micellar particles prepared by co-assembly of porphyrin compounds and amphiphilic macromolecules formulated by copolymerization of 2-butoxy ethanol (BCS), methyl methacrylate (MMA), butyl acrylate (BA) acrylic acid (AA), and diacetone acrylamide (DAAM). The experimental results revealed that this film was able to respond to the red light in terms of photothermal effect enabled by the porphyrin filler. The photothermal-triggered shape memory behaviors of the film were further examined in detail. It was noteworthy that this material was expected to have potential applications in the biomedical field due to the excellent biocompatibility of the porphyrin filler and the red-light source, which was optimal and safe enough for biomedical treatment.
Highlights
Shape memory materials are stimuli-responsive materials that can be processed into a temporary shape, fixed and retained to transform from a temporary shape back to a permanent shape through external stimuli, such as physical or chemical stimuli
The photothermal-sensitive shape memory polymer film loaded with porphyrin was prepared by cross-linking porphyrin-loaded micellar particles containing reactive groups with adipic dihydrazide (ADH)
The peak at δ = 3.61 ppm was attributed to the methoxy protons (–OCH3 ) of PMMA (poly) and δ = 4.00 ppm was the resonance peak of the protons of the ethoxy (–OCH2 –) on PBA (poly)
Summary
Shape memory materials are stimuli-responsive materials that can be processed into a temporary shape, fixed and retained to transform from a temporary shape back to a permanent shape through external stimuli, such as physical or chemical stimuli. Such a transformation is termed the shape memory effect. The main advantages of using light to induce shape transitions are that (1) non-contact remote wireless activation is achievable;. The use of light as a stimulus for shape memory effect will further expand the applications of SMPs, especially in the field of biomedicine
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