Harvard College

Canhui Yang

Zhigang Suo

Robert Howe

Qihan Liu

Paul Le Floch

Xi Yao

Yecheng Wang

Shuang Zhou

Guodong Nian

Kun Jia

Sibo Cheng

Guoyong Mao

Yashraj S Narang

A composite material is disclosed including: a first material including a plurality of crosslinked first polymer chains including a plurality of first polymer monomeric units; a coating layer on the surface of the first material, wherein the coating layer includes a plurality of adhesion polymer chains, wherein the plurality of adhesion polymer chains includes a plurality of the first polymer monomeric units and a plurality of first bond-forming units, wherein the adhesion polymer chains are interwoven with the first polymer chains; and a second material including a plurality of second polymer chains, wherein the coating layer is disposed in-between the first and the second material and contacting the surface of the first and the second material, and a portion of the second polymer chains includes a plurality of second polymer monomeric units and second bond-forming units; wherein the first and the second bond-forming units form one or more bonds.

Composite materials

A polymer composite of dissimilar polymers covalently bonded at the interface is disclosed. A method for bonding dissimilar polymers includes providing a first precursor to a hydrogel polymer network comprising a first coupling agent; providing a second precursor to a second polymer network comprising a second coupling agent, wherein the hydrogel polymer network and the second polymer network are different; initiating polymerization of the first precursor to form a hydrogel polymer network, wherein the first coupling agent is incorporated into the polymer network with a negligible amount of condensation; initiating polymerization of the second precursor to form a second polymer network, wherein the second coupling agent is incorporated into the second polymer network with a negligible amount of condensation; contacting one of the first hydrogel precursor or the hydrogel polymer network with one of the second polymer precursor or second polymer networks and initiating condensation between the first and second coupling agents to form a covalent bond.

Bonding dissimilar polymer networks in various manufacturing processes

A stretchable temperature sensor includes one or more elastomeric ionic conducting layers; at least two electronic conducting elements, wherein the one or more ionic conducting layers and one or more electronic conducting elements are configured and arranged to provide at least one electrical double layer at a first contact area between the ionic conducting layer and a first electronic conducting element in a sensing end and at least one electrical double layer at a contact area between the ionic conducting layer and a second electronic conducting element in an open end of the temperature sensor; wherein the second electronic conducting element provides a connection at the open end to an external circuit for measuring a signal generated in response to a temperature condition at the sensing end.

Elastomeric temperature sensor

A stretchable electrooptical device includes a liquid crystal cell disposed between first and second ionic conducting gel layers; and first and second electronic conductors in electrical contact with the first and second ionic conducting gel layers, respectively, said first and second electronic conductors connectable to an external voltage source.

Stretchable electrooptical and mechanooptical devices comprising a liquid crystal cell disposed between first and second ionic conducting gel layers

Growing community of inventors

Somerville, MA, United States of America

Canhui Yang