Multifunctional bonding of hydrogels

US10954375B2 · kind B2 · utility

Assignee

• Massachusetts Institute of Technology · US

Inventors

• Xuanhe Zhao · Durham, US
• Shaoting Lin · Cambridge, US
• Hyunwoo Yuk · Cambridge, US
• Teng Zhang · Kunshan, CN
• German A P Hernandez · Cambridge, US

Key dates

• Filing date: Jun 2, 2016
• Grant date: Mar 23, 2021
• Expiry date: Oct 15, 2038

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2205/04
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A robust hydrogel-solid hybrid formed of a substrate material having a nonporous and non-topographically patterned surface and a tough hydrogel bonded to the surface, the tough hydrogel having over 90 wt % water, and the hydrogel being bonded to provide interfacial toughness over 300 Jm−2, and even over 1000 Jm−2. The hydrogel is formed of polyacrylamide or polyethylene glycol diacrylate, which provide long-chain polymer networks, and chitosan, hyaluronan, or alginate, which provide mechanically dissipative components. An anchor, which can be a silane, a sulfide, or an amine, is disposed between the surface and the hydrogel to provide chemical bonding between the surface and the long-chain networks of the hydrogel.