Covalently cross-linked lignocellulosic composites and applications thereof

Patent metadata

Field	Value
Publication number	US-10899667-B2
Application number	US-201815990188-A
Country	US
Kind code	B2
Filing date	May 25, 2018
Priority date	May 26, 2017
Publication date	Jan 26, 2021
Grant date	Jan 26, 2021

Abstract

In one aspect, composite polymeric composition and related materials are described herein employing waste products from the agricultural and energy industries. Such composite polymeric compositions and materials can repurpose agricultural and petroleum waste products for various applications including, but not limited to, building and/or infrastructure materials. In some embodiments, a composite polymeric composition described herein comprises polysaccharides, lignin or combinations thereof covalently cross-linked via linkages comprising sulfur.

First claim

The invention claimed is:

1. A composite polymeric composition comprising:
lignin polymers covalently cross-linked via linkages comprising sulfur.

2. The composite polymeric composition of claim 1 , wherein the cross-linked lignin polymers form a matrix.

3. The composite polymeric composition of claim 2 further comprising a biopolymer or synthetic polymer component embedded in the matrix.

4. The composite polymeric composition of claim 3 , wherein the biopolymer component comprises one or more polysaccharides.

5. The composite polymeric composition of claim 4 , wherein the one or more polysaccharides comprise cellulose, hemicellulose or mixtures thereof.

6. The composite polymeric composition of claim 4 , wherein polysaccharide chains are covalently cross-linked via linkages comprising sulfur.

7. The composite polymeric composition of claim 6 , wherein the polysaccharide chains are cross-linked with the lignin polymers via linkages comprising sulfur.

8. A composite material comprising:
aggregate; and
a binder for the aggregate, the binder comprising a composite polymeric composition including polysaccharides covalently cross-linked via linkages comprising sulfur, and lignin polymers covalently cross-linked via linkages comprising sulfur.

9. The composite material of claim 8 , wherein the polysaccharides are formed of cellulose, cellulose derivative or mixtures thereof.

10. The composite material of claim 8 , wherein the aggregate is present in an amount of 5 to 95 weight percent of the composite material.

11. The composite material of claim 8 , wherein the lignin polymers and polysaccharides are cross-linked with one another via linkages comprising sulfur.

12. The composite material of claim 8 , wherein the aggregate comprises rock, sand, gravel, ceramics, refractory material, recycled asphalt, recycled concrete or combinations thereof.

13. The composite material of claim 12 , wherein the composite material is pavement or masonry.

14. The composite material of claim 12 , wherein the binder further comprises cement.

15. The composite material of claim 8 , wherein sulfur is present in an amount of 5 weight percent to 99 weight percent of the composite material.

Assignees

• Univ Clemson Res Foundation
• Univ Clemson

Inventors

• Smith Rhett C
• Tennyson Andrew G

Classifications

• C04B26/285 Primary

  Cellulose or derivatives thereof (C04B26/24 takes precedence) · CPC title

• C04B26/28 Primary

  Polysaccharides or derivatives thereof · CPC title

• Y02W30/91

  Use of waste materials as fillers for mortars or concrete · CPC title

• C04B18/021

  agglomerated by a mineral binder, e.g. cement · CPC title

• C04B2103/0062

  Cross-linked polymers · CPC title