Method for joining dissimilar materials

Patent metadata

Field	Value
Publication number	US-11834592-B2
Application number	US-202117169874-A
Country	US
Kind code	B2
Filing date	Feb 8, 2021
Priority date	Jul 23, 2018
Publication date	Dec 5, 2023
Grant date	Dec 5, 2023

Abstract

A deposition system has a multi-material print head, a first reservoir of a first compatible material having particles containing chemical elements similar to a first substrate, a second reservoir of a second compatible material having particles containing chemical elements similar to a second substrate, a third reservoir of an polymer precursor material, and at least one mixer. A method of bonding a joint between dissimilar substrate materials includes functionalizing a first compatible material having chemical elements similar to a first substrate, mixing the first compatible material with a polymer precursor material, functionalizing a second compatible material having chemical elements similar to a second substrate, mixing the second compatible material with a polymer precursor material, and using the deposition system to deposit the first and second compatible materials and a polymer precursor material on the joint between the first and second substrate materials.

First claim

What is claimed is:

1. A deposition system for joining two dissimilar substrates with an adhesive, comprising:
a multi-material print head;
a first reservoir of a material comprising first particles functionalized with curable reactive groups, the first particles having similar chemical elements and compatibility with a first of the two dissimilar substrates;
a second reservoir of a material comprising second particles functionalized with curable reactive groups, the second particles having similar chemical elements and compatibility with a second of the two dissimilar substrates;
a third reservoir of a material comprising a curable adhesive;
a pump to provide pressure to move the materials; and
at least one mixer configured to selectively mix multiple curable adhesive mixtures of the materials at various concentrations, and feed each curable adhesive mixture to the multi-material print head;
wherein the multi-material print head forms the adhesive by depositing layers of each curable adhesive mixture on the first substrate, the adhesive having:
an exposed bonding surface for contacting the second substrate;
a concentration gradient of the first particles that increases in a region approaching the first substrate; and
a concentration gradient of the second particles that increases in a region approaching the exposed bonding surface.

2. The deposition system of claim 1 , wherein the first particles and the second particles are selected from the group consisting of: functionalized graphene; functionalized graphene oxide; functionalized carbon nanotubes; functionalized aluminum oxide; functionalized titanium dioxide; functionalized silicon dioxide; and magnesium dioxide; and
wherein the second particles are different from the first particles.

3. The deposition system of claim 1 , further comprising at least one manifold when multiple mixers are present to merge multiple mixtures.

4. The deposition system of claim 1 , wherein the multi-material print head comprises a coextrusion deposition device or a slot die.

5. The deposition system of claim 4 , wherein the multi-material print head is mounted to a robotic system.

Assignees

• Palo Alto Res Ct Inc
• Xerox Corp

Inventors

• Iftime Gabriel
• Johnson David Mathew
• Rivest Jessica Louis Baker

Classifications

• C09J5/04 Primary

  involving separate application of adhesive ingredients to the different surfaces to be joined · CPC title

• B29C65/526

  by printing or by transfer from the surfaces of elements carrying the adhesive, e.g. using brushes, pads, rollers, stencils or silk screens · CPC title

• B29C66/7212

  characterised by the composition of the fibres · CPC title

• B32B5/14

  characterised by a layer differing constitutionally or physically in different parts, e.g. denser near its faces · CPC title

• B32B5/142

  Variation across the area of the layer · CPC title