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

Award Information

National Science Foundation
Award ID:
Program Year/Program:
2007 / STTR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
Novana, Inc.
916 Stream Valley Trail Alpharetta, GA 30022-6475
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 1
Fiscal Year: 2007
Title: STTR Phase I: Precision Polymer Microprofile Extrusion with a Conformal Fluidic Control Environment
Agency: NSF
Contract: 0637784
Award Amount: $150,000.00


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.

Principal Investigator:

F. Daniel E. Tsai

Business Contact:

F Daniel L. Tsai
Small Business Information at Submission:

916 Stream Valley Trail 6745 HOLLISTER AVENUE Alpharetta, GA 30022

EIN/Tax ID: 203684173
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Research Institution Information:
GA Inst of Tech
225 Stream Valley Trail
Alpharetta, GA 30022-6475
Contact: Donggang A. Yao
Contact Phone: (404) 894-9076
RI Type: Nonprofit college or university