Print Page | Contact Us | Report Abuse | Sign In | Register
Graphene Composites Testing Project
Share |

Graphene Enhanced Composites Comparative Testing Project

NOTICE: This Project is Now Fully Subscribed!

If you would like to participate, please write me at tbarkan@thegraphenecouncil.org to register your interest in participating. We will maintain a waiting list. Thank you!

 

Objectives

This project will compare a standard resin system that is commonly used to produce composite parts and that has been enhanced with different forms of graphene. The end result will be the ability to compare untreated resin test parts with those that have had graphene added and to measure changes in a.) tensile and stiffness, b.) flex, c.) impact toughness, d.) compression strength and e.) inter-laminar shear.

The results should give an indication of the efficacy of using different forms of graphene as a nano-additive in composites at various load factors and in different configurations, including non-reinforced and fiber reinforced parts. 

This will in turn provide the broader community (as well as participating companies) with independent data regarding potential performance improvements from the use of graphene additives, as well as a comparison of results of different forms of graphene materials. 

Approach

We encourage broad participation from graphene producers and formulators, and encourage the submission of a range of graphene materials including functionalized and non-functionalized forms of material. 

Partners

The project is at the initiative of The Graphene Council and is pleased to have the full support and collaboration of Composites One, represented by Dr. Jason Gibson, providing their expertise regarding the resin systems used for testing. We are also proud to work with the Utah Advanced Materials and Manufacturing Initiative (UAMMI) as the test sample preparation, testing and characterization partners for this project, led by Dr. Brent Strong. 


Materials and Preparation

The following materials will be used for testing in the project;

RESIN

We will use the Huntsman Araldite® GY 282 Resin

Typical Properties                                          Property Value

Appearance

Clear, no contamination

Color, Gardner, max

0 - 5

Epoxy equivalent, g/eq

166 - 176

Viscosity @ 25°C, cP

3000 - 4000

Density @ 25°C, g/cm3

1.18

Flash point, closed cup, °C (°F)

>93 (>200)

 


CURING AGENT

OMICURE DDA 10 is a micronized grade of Dicyandiamide, a solid latent curing agent for epoxy resins. It has a mean particle size of approximately 12μ and is one of several grades of Dicyandiamide offered by CVC that differ on particle size.  OMICURE DDA 10 contains approximately 2% silica as an anti-caking aid.

 Appearance White Crystalline Powder
 Onset Melting Point (°C) 207-212
 Melamine Content, max % 1.5
 Moisture Content (loss @ 105°C) max % 0.7
 Particle Size %<11μ 50%
 Particle Size %<30μ 90% 

 

GLASS FIBER

VECTORPLY:  E-LT 1200-P (Product Specification Sheet available upon request)

Fiber Type: E-Glass

Architecture: 0/90 Biaxial

Dry Thickness: 0.017 in. / 0.43 mm

Total Weight: 11.94 oz/sq.yd / 405 g/sq.m


CARBON FIBER

VECTORPLY: C-LT 1100 (Product Specification Sheet available upon request)

Fiber Type: Carbon

Architecture: 0/90 Biaxial

Dry Thickness 0.020 in. / 0.51 mm

Total Weight: 11.14 oz/sq.yd / 378 g/sq.m

 

GRAPHENE

Each participating company will provide 50grams of the type of graphene material that they wish to have tested as part of the project. 

Companies may submit more than one type of graphene in which case 50grams will be required for each type of material submitted. (Separate participation fees apply to each form of material submitted.)

Samples must be prepared in an airtight, break resistant container that is properly packaged and clearly labeled for transport.

Samples must include a Material Specification Sheet as well as a Safety Data Sheet.

Slurry Preparation

Host resin is Huntsman GY-282. 

Process for slurry would be a simple blade mixer with heat similar to: 

             https://www.silverson.com/us/products/laboratory-mixers

Resin temperature would be raised to 200 f and Graphene addition would be made until loading level is achieved. 

Allow to cool to 25c and determine if viscosity of the paste is no greater than 2,300 cP 

At 2,000 to 2,300 cP, the slurry should behave as a room temperature semi solid and should be easily “let down” into other resin systems as an A side component.


Sample Preparation and Testing

Samples for testing will be prepared with graphene added in the following load factors; a.) 0.0% (neat), b.) 1.0%, c.) 0.5% and d.) 0.1% by weight. 

Samples will be made with each of the 4 above defined load factors into the three following compositions; 

a.) non-reinforced (resin only), 

b.) reinforced with glass fiber* and 

c.) reinforced with carbon fiber* 

*Fiber reinforced samples will have the fiber layers stacked and the graphene enhanced resin mixture will be infused into the stacked materials. Curing will be performed in a compression press. 

Test coupons will be prepared in a form and format suitable for the following standardized tests:

Performance Characteristic Test Methods

Neat Samples

Tensile Strength/Modulus and Strain (%)  ASTM D3039
 Flexural Strength/Modulus   ASTM D790 
 Impact Toughness ASTM D5420

Reinforced Samples

 Compression Strength and ModulusASTM D6641 
 Tensile Strength and Modulus ASTM D3039 
 Inter-laminar Shear Strength and Modulus ASTM D2344
 Flexural Strength/Modulus ASTM D790 
 Impact toughness ASTM D5420

A total of six (6) samples per load factor and composition will be tested for each of the above tests. This will require a total of 360 individual test coupons per type of graphene submitted for testing. (4 load factors X 3 configurations X 5 tests X 6 test samples per test = 360 pieces for each type of graphene tested.)

Testing will be performed under the supervision of the Utah Advanced Materials and Manufacturing Initiative (UAMMI) https://www.uammi.org.


Reporting

The findings of the sample testing will be made public in a report that identifies different sample materials as simply “Sample A, Sample B, etc.” 

Each participating company will receive a full report of the test results for their sample(s) materials but will not know the identity of the other participating companies (only the anonymized results with a basic description of the type of material used. 

The identities of participating companies will not be made known by the project partners, however participating companies may choose to disclose their own testing results if they so choose. 

A grid will be prepared for each type of test performed to compare the performance characteristics being tested (impact, flex, etc.). 

Example: 

Participation

Any company that produces or that processes graphene materials may participate in the study. Members of The Graphene Council will be given the opportunity to participate at a significant discount to non-member companies. 

Participating companies will be required to pay an administrative fee to cover the cost of the resin, forms, equipment and labor used to prepare and to the test the samples. Fees will also be used to cover the cost of the testing equipment, facilities, laboratory personnel, analysis and report preparation. 

Graphene Council Member Companies, per sample $1,500

Non Member Companies, per sample $3,500

Participating companies will assume the cost of submitting their materials for testing including the cost of the samples provided, shipping and packaging. Any materials not consumed in the testing will not be returned. 

The Graphene Council and its partners (Composites One and UAMMI) shall use their best efforts in the handling, preparation and testing of materials according to the referenced standards. Participating companies shall hold The Graphene Council and its partners (Composites One and UAMMI) harmless from any claims in connection with this voluntary comparative testing project. 

Test results, including the final report are expected no later than 90-120 days from the date materials are submitted subject to the availability of testing facilities. 

The Graphene Council reserves the right to publish the results of the report so long as the names of the participating companies remain publicly anonymous. The report may be published in part or in whole as new test results are produced.

Conclusion

The purpose of this testing project is to provide publicly available data regarding the impact of different forms of graphene for use in at least one form of resin and different composite forms. 

We believe these results will be of value to the general public that is interested in the potential use of graphene enhanced composites. We appreciate that this test project is looking at just one form of resin system but hope that it stimulates greater interest and testing of graphene across a broad range of composite resin systems. 

We also believe that the results of this testing project will be of considerable interest for the participating companies. They will receive 3rd party, independent testing of their material in different composites formats and at the same time, have the ability to do a head to head comparison against other forms and types of graphene (without knowing the identity of the other companies involved). 

Commercial adoption of a new material like graphene is a journey. We hope that this testing project is an important step on that journey by providing trusted data for engineers and other material specifiers that are looking at graphene enhanced materials. 

Terrance Barkan, Executive Director, The Graphene Council

REGISTER TO PARTICIPATE

Use the link below to register as a project participate by making payment of the Project administration Fees. Be sure to select the correct category (MEMBER or NON-MEMBER). The MEMBER rate applies to CORPORATE, ENTERPRISE or UNIVERSITY membership categories only. 

Information on how to join can be found here

Upon receipt of payment you will be provided with detailed instructions on where to send your sample material for the testing project. You will receive a tracking number to be used to identify your sample(s). 

A separate fee must be paid for each type of graphene material you wish to have tested as part of the project. 

If you have any questions or need assistance, please contact us directly at tbarkan@thegraphenecouncil.org or call +1 202 294 5563