Method of making composite from green material

Patent metadata

Field	Value
Publication number	US-11413795-B1
Application number	US-202117400646-A
Country	US
Kind code	B1
Filing date	Aug 12, 2021
Priority date	Aug 12, 2021
Publication date	Aug 16, 2022
Grant date	Aug 16, 2022

Abstract

A method of making a composite laminate includes dequilling chicken feathers to form chicken feather fibers (CFFs). The CFFs and Ceiba Pentandra bark fibers (CPFs) are milled to form milled CFFs and milled CPFs so that the milled CFFs have a length of smaller than 200 microns and the milled CPFs have a length of smaller than 600 microns. The CFFs are treated with an amine compatibilizer to esterify carboxy groups present on keratin in the CFFs. A mixture of an epoxy resin, the milled CFFs, and the milled CPFs is solution cast to form an epoxy composite. A first carbon fabric layer and a second carbon fabric layer are placed on a front side and a backside, respectively, of the epoxy composite to form an epoxy laminate precursor. The epoxy laminate precursor is compression molded to cure the epoxy laminate precursor to form the composite laminate.

First claim

The invention claimed is:

1. A method of preparing a composite laminate, the method comprising:
dequilling chicken feathers to form chicken feather fibers (CFFs),
milling the CFFs and Ceiba Pentandra bark fibers (CPFs) to form milled CFFs and milled CPFs so that the milled CFFs have a length of smaller than 200 microns and the milled CPFs have a length of smaller than 600 microns;
treating the CFFs with tris(hydroxymethyl)aminomethane to esterify carboxy groups present on keratin in the CFFs to form compatibilized CFFs;
treating the CPFs with NaIO 4 to form treated CPFs having dialdehyde groups;
covalently bonding the compatibilized CFFs and the treated CPFs through amine groups on the CFFs and dialdehyde groups on the CPFs; then
solution casting a mixture of an epoxy resin, the milled CFFs and the milled CPFs to form an epoxy composite;
placing a first carbon fabric layer on a front side of the epoxy composite and a second carbon fabric layer on a backside of the epoxy composite to form an epoxy laminate precursor; and
compression molding the epoxy laminate precursor in a mold to cure the epoxy laminate precursor and form the composite laminate,
wherein the epoxy resin has a weight fraction of 50%-75% in the composite laminate;
the CFFs have a weight fraction of 10%-30% in the composite laminate;
the CPFs have a weight fraction of 10%-30% in the composite laminate; and
the first carbon fabric layer and the second carbon fabric layer have a weight fraction of 5%-15% in the composite laminate.

2. The method of claim 1 , further comprising:
casting the epoxy mixture onto a casting mold; and
drying to form the epoxy composite.

3. The method of claim 2 , wherein:
the epoxy composite has a thickness of 2-4 millimeters, and
the composite laminate has a thickness of 2-4 millimeters.

4. The method of claim 1 , further comprising extracting the CFFs from chicken feathers by:
washing chicken feathers with an organic solvent that is soluble in water; and
milling CFFs having a length of 10-30 mm to form the milled CFFs.

5. The method of claim 4 , wherein the milled CFFs have a density of 0.35-0.40 gram per cubic centimeter.

6. The method of claim 1 , further comprising extracting the CPFs from Ceiba Pentandra bark by:
immersing the Ceiba Pentandra bark in water;
comminuting the Ceiba Pentandra bark to form comminuted CPFs; treating the comminuted CPFs with an aqueous solution of sodium hydroxide to form the CPFs; and
milling the CPFs to form the milled CPFs.

7. The method of claim 6 , wherein the milled CPFs have a density of 0.55-0.60 gram per cubic centimeter.

8. The method of claim 1 , further comprising curing the composite laminate at an elevated temperature.

9. The method of claim 8 , further comprising curing the composite laminate at 80° C. for 24 hours to form a cured composite laminate before cutting the cured composite laminate into required specimen dimensions.

10. The method of claim 1 , further comprising mixing the epoxy resin with a hardener wherein:
the hardener includes a mixture of isophorone diamine and benzyl alcohol; and
the epoxy resin and the hardener are mixed in a weight ratio of 1:0.5 to 1:0.2.

11. The method of claim 10 , wherein:
the isophorone diamine has a weight percentage of less than 60% in the hardener; and
the benzyl alcohol has a weight percentage of less than 40% in the hardener.

12. The method of claim 1 , wherein more than 50% of chemical composition of the epoxy resin is from plants.

13. The method of claim 1 , wherein the first carbon fabric layer and the second carbon fabric layer includes carbon fabrics in a plain woven form of 300-400 grams per square meter.

Assignees

• Univ King Abdulaziz

Inventors

• Khan Anish
• Asiri Abdullah Mohamed
• Rangappa Sanjay Mavinkere

Classifications

• B29K2105/122

  microfibres or nanofibers · CPC title

• B29C70/025

  with particular filler · CPC title

• B29C43/20

  Making multilayered or multicoloured articles {(B29C43/14 takes precedence)} · CPC title

• B29C43/02

  of articles of definite length, i.e. discrete articles {(B29C35/0227 takes precedence)} · CPC title

• D01C3/00 Primary

  Treatment of animal material, e.g. chemical scouring of wool · CPC title