Fabrication of Photothermally Responsive Nanocomposite Hydrogel through 3D Printing. Issue 2 (29th December 2019)

• Record Type: Journal Article
• Authors: Zhang, Lun; Zhang, Xueqian; Li, Lei; Liu, Yinghao; Wang, Dong; Xu, Liqiang; Bao, Jianjun; Zhang, Aimin
• Is Part Of: Macromolecular materials and engineering. Volume 305:Issue 2(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-12-29
• Subjects: 3D printing -- actuator -- near‐infrared light -- poly(N‐isopropyl acrylamide)/graphene oxide hydrogel -- ultraviolet light polymerization; Plastics -- Periodicals; Polymers -- Periodicals; Polymerization -- Periodicals; 547.705
• DOI: 10.1002/mame.201900718
• Languages: English
• ISSNs: 1438-7492

Abstract

Abstract: The responsive hydrogels have received great attention in many fields. However, the molding method and response mode of such hydrogels are criticized when it comes to real applications. In this work, a novel class of poly( N ‐isopropyl acrylamide)/graphene oxide (PNIPAm/GO) nanocomposite hydrogel through self‐assembly three‐dimensional (3D) printing via ultraviolet light polymerization. The precursor is ordinarily constituted by NIPAm monomer, crosslinker, and water mixed with a photoinitiator, besides the introduction of nanoclay adjusts the shear thinning properties to an optimal level, which is important for the 3D printing precision. Then, the graphite oxide as infrared light absorber endows the hydrogel fast photothermal excited responsivity instead of conventional temperature response. The shrinkage and swelling of the composite hydrogel can be controlled by turning the near‐infrared light on or off. Meanwhile, the reversible behavior of as‐prepared hydrogel is easily regulated by altering the content of GO and illumination time of near‐infrared light. Additionally, a round tube is obtained based on the as‐prepared hydrogel, which can be driven to get a pencil, indicating their potential applications in actuator and other functional program. Abstract : A precise three‐dimensional (3D) printed poly( N ‐isopropyl acrylamide)/graphene oxide (PNIPAm/GO) hydrogel product is fabricated by coupling the simple 3D printing fabrication with ultraviolet light polymerization process, which can exhibit the reversible volume change by the NIR light. A printed round tube is driven to get a pencil, implying the PNIPAm/GO hydrogel has a potential application for actuator.