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Standard At A Glance
- ASTM F2150
- ASTM D412
- ASTM D882
Hydrogels are increasingly popular materials used in the medical field, most commonly as delivery vehicles for drugs or as environments for cell culture. As drug delivery vehicles, hydrogels can effectively transport medications within the body to the target location without inducing an immune response. The design of their internal structure typically allows the drug to be released at the correct prescribed rate, ensuring proper absorption and efficacy.
Though there are a few standards that provide extremely basic guidelines for evaluating the physical properties of hydrogels and other biomaterials, no specific test procedures exist for this material. ASTM F2150 evaluates the properties for biomaterial scaffolds, the under-arching structure for engineered tissues. This standard simply references the more common tensile standards like ASTM D412 and ASTM D882 to serve as starting points for evaluating the tensile properties of these materials.
For the most accurate results it is imperative that these materials be tested in-vitro, surrounded by a saline solution at body temperature. Most tensile testing of hydrogels aims to identify the strength and modulus of the material in a comparative study of hydrogel compositions.
Materials Testing System
Hydrogels are extremely fragile and sometimes cannot withstand side action style grips. In this case, custom shoulder end grips are ideal and can be designed specifically for the customer’s sample. They should be tested as a dog bone shape to improve the chances of failure within the gauge length.
For testing hydrogels we recommend a 6800 Series single column testing system with low-capacity grips and 100 N load cell. If highly accurate strain measurement is needed, Instron's AVE2 is ideal for this application. In order to create a suitable in-vitro environment, Instron's BioBath is required.
|ASTM F2150 Test Setup|
|1)||6800 Series Universal Testing System
|2)||BioPuls Temperature Controlled Bath
|3)||2580 Series Load Cell
|4)||2752-005 Submersible Pneumatic Grips
Instron 6800 Series Universal Testing Systems provide unparalleled accuracy and reliability. Built on a patent-pending Operator Protect system architecture with an all-new Smart-Close Air Kit and Collision Mitigation features, the 6800 Series makes materials testing simpler, smarter, and safer than ever before.
Bluehill Universal Software is built from the ground-up for touch interaction and an intuitive user experience. Discover simpler and smarter testing with features such as pre-loaded test methods, QuickTest in seconds, enhanced data exporting: and Instron Connect – a new feature that provides a direct communication link to Service. Users of previous versions of software such as Bluehill 2 and Bluehill 3 can easily upgrade to the newest version of Bluehill.
The second generation Advanced Video Extensometer (AVE 2) utilizes patented measurement technology in the fastest, most accurate non-contacting strain measurement device commercially available.