@article{921722515caf47a1ab4557bed9e399e4,
title = "Thermal-recoverable tough hydrogels enhanced by porphyrin decorated graphene oxide",
abstract = "Artificial tissue materials usually suffer properties and structure loss over time. As a usual strategy, a new substitution is required to replace the worn one to maintain the functions. Although several approaches have been developed to restore the mechanical properties of hydrogels, they require direct heating or touching, which cannot be processed within the body. In this manuscript, a photothermal method was developed to restore the mechanical properties of the tough hydrogels by using near infrared (NIR) laser irradiation. By adding the porphyrin decorated graphene oxide (PGO) as the nanoreinforcer and photothermal agent into carrageenan/polyacrylamide double network hydrogels (PDN), the compressive strength of the PDN was greatly improved by 104%. Under a short time of NIR laser irradiation, the PGO effectively converts light energy to thermal energy to heat the PDN hydrogels. The damaged carrageenan network was rebuilt, and a 90% compressive strength recovery was achieved. The PGO not only significantly improves the mechanical performance of PDN, but also restores the compressive property of PDN via a photothermal method. These tough hydrogels with superior photothermal recovery may work as promising substitutes for load-bearing tissues.",
keywords = "Compressive strength, Double network, Hydrogels, Photothermal recovery, Porphyrin decorated graphene oxide",
author = "Jilong Wang and Junhua Wei and Siheng Su and Jingjing Qiu and Zhonglue Hu and Molla Hasan and Evan Vargas and Michelle Pantoya and Shiren Wang",
note = "Funding Information: Acknowledgments: The authors thank the financial support from the Fundamental Research Funds for the Central Universities (19D110112). This research is also supported by the Initial Research Funds for Young Teachers of Donghua University. The authors thank the Imaging Center of Texas Tech University for the TEM and Golden Kumar for the compressive tests and DSC. Funding Information: This research was funded by Fundamental Research Funds for the Central Universities, grant number 19D110112. This research was also funded by Initial Research Funds for Young Teachers of Donghua University. The APC was funded by Initial Research Funds for Young Teachers of College of Textiles, Donghua University. Acknowledgments: The authors thank the financial support from the Fundamental Research Funds for the Central Universities (19D110112). This research is also supported by the Initial Research Funds for Young Teachers of Donghua University. The authors thank the Imaging Center of Texas Tech University for the TEM and Golden Kumar for the compressive tests and DSC. Funding Information: Funding: This research was funded by Fundamental Research Funds for the Central Universities, grant number 19D110112. This research was also funded by Initial Research Funds for Young Teachers of Donghua University. The APC was funded by Initial Research Funds for Young Teachers of College of Textiles, Donghua University. Publisher Copyright: {\textcopyright} 2019 by the authors. Licensee MDPI, Basel, Switzerland.",
year = "2019",
month = oct,
doi = "10.3390/nano9101487",
language = "English",
volume = "9",
journal = "Nanomaterials",
issn = "2079-4991",
number = "10",
}