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      4D Printing with Mechanically Robust, Thermally Actuating Hydrogels

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          Abstract

          A smart valve is created by 4D printing of hydrogels that are both mechanically robust and thermally actuating. The printed hydrogels are made up of an interpenetrating network of alginate and poly(N-isopropylacrylamide). 4D structures are created by printing the "dynamic" hydrogel ink alongside other static materials.

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          Most cited references20

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          Strengthening alginate/polyacrylamide hydrogels using various multivalent cations.

          We successfully synthesized a family of alginate/polyacrylamide hydrogels using various multivalent cations. These hydrogels exhibit exceptional mechanical properties. In particular, we discovered that the hydrogels cross-linked by trivalent cations are much stronger than those cross-linked by divalent cations. We demonstrate stretchability and toughness of the hydrogels by inflating a hydrogel sheet into a large balloon, and the elasticity by using a hydrogel block as a vibration isolator in a forced vibration test. The excellent mechanical properties of these hydrogels may open up applications for hydrogels.
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            Biomimetic Hydrogel-Based Actuating Systems

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              Super tough double network hydrogels and their application as biomaterials

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                Author and article information

                Journal
                Macromolecular Rapid Communications
                Macromol. Rapid Commun.
                Wiley
                10221336
                June 2015
                June 2015
                April 10 2015
                : 36
                : 12
                : 1211-1217
                Affiliations
                [1 ]Intelligent Polymer Research Institute; ARC Centre of Excellence for Electromaterials Science; AIIM Facility; University of Wollongong; Wollongong NSW 2522 Australia
                [2 ]School of Mechanical Materials and Mechatronic Engineering; University of Wollongong; Wollongong NSW 2522 Australia
                [3 ]Soft Materials Group; School of Chemistry University of Wollongong; Wollongong NSW 2522 Australia
                Article
                10.1002/marc.201500079
                25864515
                b5d07459-e50f-4bf6-993c-4a336eed32f4
                © 2015

                http://doi.wiley.com/10.1002/tdm_license_1.1

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