Laminated composites and methods of making the same
AssigneeGM Global Technology Operations LLC
InventorsChoongyong Kwag, Chen-Shih Wang
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Abstract
The instant disclosure relates to a laminated composite and methods of making the same. The laminated composite includes a plurality of stacked prepregs having an interface formed between each pair of adjacent prepregs. Each prepreg includes a matrix material and reinforcing fibers dispersed therein. The laminated composite also includes at least one fibrous veil laminated to at least a portion of at least one of the interfaces, the at least one fibrous veil having nanofibers attached to at least one surface thereof. Also disclosed herein are a fibrous veil and a method of making the nanofiber-doped fibrous veil.
Claims22
A laminated composite, comprising:
- a plurality of stacked prepregs having an interface formed between each pair of adjacent prepregs, each prepreg including a matrix material and reinforcing fibers dispersed therein;
- and
- at least one fibrous veil laminated to at least a portion of at least one of the interfaces, the at least one fibrous veil having nanofibers attached to at least one surface thereof.
A method of making an impact-resistant laminated composite, the method comprising:
- doping a surface of at least one fibrous veil with nanofibers;
- laminating the at least one fibrous veil to at least a portion of an interface between a plurality of prepregs, each prepreg including reinforcing fibers in a matrix material;
- and
- molding the laminated plurality of prepregs into the composite.
A fibrous veil, comprising:
- a base including a plurality of fibers, each of the plurality of glass fibers having an average diameter ranging from about 7,000 nm to about 9,000 nm;
- and
- at least one of oxidized and non-oxidized carbon nanofibers attached to at least some of the plurality of glass fibers, wherein the carbon nanofibers have an average diameter ranging from about 60 nm to about 200 nm.
A method of making a nanofiber-doped fibrous veil, the method comprising:
- dispersing at least one of oxidized carbon nanofibers and non-oxidized carbon nanofibers into a solution by sonication;
- dipping at least one fibrous veil into the dispersed carbon nanofiber solution;
- and
- drying the at least one dipped veil at a predetermined temperature.
The method of claim 22 wherein the dispersant is selected from the group consisting of dimethylsulfoxide, N-methyl-2-pyrrolidone, and a nonionic surfactant which includes a hydrophilic polyethylene oxide group.
Dependencies are inferred from the claim text.