Advanced search options

Advanced Search Options 🞨

Browse by author name (“Author name starts with…”).

Find ETDs with:

in
/  
in
/  
in
/  
in

Written in Published in Earliest date Latest date

Sorted by

Results per page:

You searched for id:"handle:10217/195402". One record found.

Search Limiters

Last 2 Years | English Only

No search limiters apply to these results.

▼ Search Limiters


Colorado State University

1. Bui, Hieu T. Development of hyaluronan enhanced expanded polytetrafluoroethylene and linear low density polyethylene for blood contacting applications, The.

Degree: PhD, Biomedical Engineering, 2019, Colorado State University

Cardiovascular disease is the number one cause of death in high income, industrialized countries. Designing cardiovascular implants from synthetic polymers is a cost-effective solution to the growing demand for medical treatments such as heart valve replacements and cardiovascular bypass procedures. Synthetic polymers are often known for their tunability, durability, and low production cost. Unfortunately, these materials are also prone to induce thrombosis. Therefore, improving the blood compatibility of these polymers is still a major challenge in the biomedical field. This dissertation discusses the alteration of two synthetic polymers, linear low density polyethylene (LLDPE) and expanded polytetrafluoroethylene (ePTFE), using hyaluronan (HA) to improve their blood compatibility. HA, a naturally occurring polysaccharide in the human body, is known for its wound healing and anticoagulant properties. In this work, two unique methods were developed for HA enhancement of ePTFE (HA-ePTFE) and LLDPE (HA-LLDPE). This was a process driven research that aimed at designing HA-ePTFE and HA-LLDPE by analyzing the effect of different treatment parameters on the properties of the resultant materials. In the case of ePTFE, it was demonstrated that HA can be incorporated into vascular ePTFE grafts by exploiting the micro pores of the polymer and adjusting the spraying treatment. In the HA-LLDPE fabrication process, its parameters were varied to assess their effects on the interpenetrating polymer network (IPN) formation. Surface characterization such as water contact angle goniometry, infrared spectroscopy, and toluidine blue O (TBO) staining prove that HA treatment successfully changed the surface chemistry and increased the hydrophilicity of ePTFE and LLDPE. Thermal analysis and gas chromatography-mass spectrometry were used to quantify the effects of different treatment conditions on material properties. Tensile properties such as elastic modulus, tensile strength, yield stress and ultimate strain are unchanged by HA enhancement for both polymers. The biological results reveal that HA-ePTFE and HA-LLDPE are not cytotoxic and result in less blood clotting and platelet activation than ePTFE and LLDPE. Advisors/Committee Members: James, Susan (advisor), Reynolds, Melissa (committee member), Popat, Ketul (committee member), Olver, Christine (committee member).

Subjects/Keywords: cardiovascular; hyaluronic acid; vascular graft; heart valve; biomaterials; polymer

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Bui, H. T. (2019). Development of hyaluronan enhanced expanded polytetrafluoroethylene and linear low density polyethylene for blood contacting applications, The. (Doctoral Dissertation). Colorado State University. Retrieved from http://hdl.handle.net/10217/195402

Chicago Manual of Style (16th Edition):

Bui, Hieu T. “Development of hyaluronan enhanced expanded polytetrafluoroethylene and linear low density polyethylene for blood contacting applications, The.” 2019. Doctoral Dissertation, Colorado State University. Accessed July 20, 2019. http://hdl.handle.net/10217/195402.

MLA Handbook (7th Edition):

Bui, Hieu T. “Development of hyaluronan enhanced expanded polytetrafluoroethylene and linear low density polyethylene for blood contacting applications, The.” 2019. Web. 20 Jul 2019.

Vancouver:

Bui HT. Development of hyaluronan enhanced expanded polytetrafluoroethylene and linear low density polyethylene for blood contacting applications, The. [Internet] [Doctoral dissertation]. Colorado State University; 2019. [cited 2019 Jul 20]. Available from: http://hdl.handle.net/10217/195402.

Council of Science Editors:

Bui HT. Development of hyaluronan enhanced expanded polytetrafluoroethylene and linear low density polyethylene for blood contacting applications, The. [Doctoral Dissertation]. Colorado State University; 2019. Available from: http://hdl.handle.net/10217/195402

.