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Smart composites containing modified cellulosic nanomaterials
US9469748B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9469748-B2 |
| Application number | US-201514675861-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 1, 2015 |
| Priority date | Mar 11, 2014 |
| Publication date | Oct 18, 2016 |
| Grant date | Oct 18, 2016 |
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- Title
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Abstract
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In accordance with some embodiments of the present invention, a composite material is prepared by blending a bio-derived filler into a polymer, wherein the filler includes a diene-modified cellulosic nanomaterial (e.g., cellulose nanocrystals (CNCs) and/or cellulose nanofibrils (CNFs) functionalized to contain a diene) and a dienophile-modified cellulosic nanomaterial (e.g., CNCs and/or CNFs functionalized to contain a dienophile). The modulus of the composite material is reversibly controllable by adjusting a degree of crosslinking between the diene-modified cellulosic nanomaterial and the dienophile-modified cellulosic nanomaterial. This degree of crosslinking is thermally reversible. On one hand, the degree of crosslinking may be increased via a Diels-Alder (DA) cycloaddition reaction at a first temperature, thereby increasing the modulus of the composite material. On the other hand, the degree of crosslinking may be decreased via a retro-DA reaction at a second temperature higher than the first temperature, thereby decreasing the modulus of the composite material.
First claim
Opening claim text (preview).
What is claimed is: 1. A method of reversibly controlling a modulus of a composite material, wherein the composite material comprises a polymer and a bio-derived filler blended into the polymer, wherein the filler comprises a diene-modified cellulosic nanomaterial and a dienophile-modified cellulosic nanomaterial, and wherein at least some of the diene-modified cellulosic nanomaterial and at least some of the dienophile-modified cellulosic nanomaterial are crosslinked to each other…
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Classifications
Chemistry & Metallurgy · mapped topic
- C08L67/04Primary
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
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- What does patent US9469748B2 cover?
- In accordance with some embodiments of the present invention, a composite material is prepared by blending a bio-derived filler into a polymer, wherein the filler includes a diene-modified cellulosic nanomaterial (e.g., cellulose nanocrystals (CNCs) and/or cellulose nanofibrils (CNFs) functionalized to contain a diene) and a dienophile-modified cellulosic nanomaterial (e.g., CNCs and/or CNFs fu…
- Who is the assignee on this patent?
- IBM
- What technology area does this patent fall under?
- Primary CPC classification C08L67/04. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Oct 18 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).