STTR Phase I: Precision Polymer Microprofile Extrusion with a Conformal Fluidic Control Environment

Award Information
Agency:
National Science Foundation
Branch
n/a
Amount:
$150,000.00
Award Year:
2007
Program:
STTR
Phase:
Phase I
Contract:
0637784
Agency Tracking Number:
0637784
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
Novana
916 Stream Valley Trail, 6745 HOLLISTER AVENUE, Alpharetta, GA, 30022
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
626754910
Principal Investigator:
F. Daniel Tsai
Dr
(770) 521-1273
dantsai@novanainc.com
Business Contact:
F Daniel Tsai
PhD
(770) 521-1273
dantsai@comcast.net
Research Institution:
GA Inst of Tech
Donggang A Yao
225 Stream Valley Trail
Alpharetta, GA, 30022-6475
(404) 894-9076
Nonprofit college or university
Abstract
The Small Business Technology Transfer Research (STTR) Phase I project will control the shape of microextruded polymers (microprofiles) using a sheath fluid at the exit of the extruder. Microprofiles are defined as continuous filaments having a non-circular cross-section with precision microfeatures and a mean diameter of 100 microns or less. In the standard polymer extrusion process, the boundary condition at the free surface of the extrudate is not controlled after the polymer exits the die. Consequently, the free deformation of the extrudate subjected to the combined effects of die swell and surface tension contributes to significant shape distortion of the extruded profile. In the proposed technology, the use of a low-viscosity fluid with closely matched surface tension as that of the polymer extrudate, will help suppress the shape change of the cross-section caused by different mechanisms. The proposed technology will provide an efficient method to produce precision polymeric micro-size profiles for various applications including the medical field. For example, these microprofiles can be used as functional filaments in artificial kidneys and artificial capillary vein networks. Filaments with highly non-circular cross-sections are also needed in the polymer composites industry to improve the integrity of the composite via mechanical interlocking with the polymer matrix.

* information listed above is at the time of submission.

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