摘要:
A monomeric formulation for creating self-propagating polymer optical waveguides and a system and a method of using the same. The monomeric formulation includes a plurality of unsaturated molecules, a molecule having a structure of R—X—H (e.g., X═O, S, N), and a photoinitiator. The monomeric formulation can further include a free radical inhibitor. The system includes a light source, a reservoir having a monomeric formulation and a patterning apparatus configured to guide a light beam from the light source into the monomeric formulation to form at least one self-propagating polymer waveguide.
摘要:
Pre-ceramic monomer formulations for creating self-propagating polymer waveguides, and a system and method of using the same, is disclosed. The formulation includes a plurality of unsaturated molecules, wherein the unsaturated molecules contain a significant amount of non-carbon atoms, a molecule having structure of R′—X1-H (e.g., X1=O, S, N), and a photoinitiator. R′ can also have non-carbon atoms. The system includes a light source, a reservoir having a monomer formulation and a patterning apparatus configured to guide a light beam from the light source into the pre-ceramic monomer formulation to form at least one self-propagating polymer waveguide and can be directly converted to interconnected three-dimensional ceramics.
摘要:
A three-dimensional biological scaffold. The scaffold includes at least three sets of polymer waveguides extending along at least three respective directions. The at least three sets of polymer waveguides interpenetrate each other at a plurality of nodes to form a self-supporting structure. In some embodiments, the polymer waveguides may be bio-degradable. In still some embodiments, the three-dimensional biological scaffold may include one or more coating layers for covering surfaces of the polymer waveguides.
摘要:
Methods to selectively control the bio-degradation rates of biologically compatible microstructures and methods to control the bio-degradation rates of three-dimensional biological scaffolds, such as ordered open-cellular polymer structures used as biological growth templates are disclosed. Medical uses and application of these materials are disclosed.
摘要:
A three-dimensional biological scaffold. The scaffold includes at least three sets of polymer waveguides extending along at least three respective directions. The at least three sets of polymer waveguides interpenetrate each other at a plurality of nodes to form a self-supporting structure. In some embodiments, the polymer waveguides may be bio-degradable. In still some embodiments, the three-dimensional biological scaffold may include one or more coating layers for covering surfaces of the polymer waveguides.
摘要:
A method for fabricating a radiation-cured structure is provided. The method includes the steps of providing a first radiation-sensitive material and a second radiation-sensitive material adjacent the first radiation-sensitive material. The first radiation-sensitive material has a first sensitivity. The second radiation-sensitive material has the first sensitivity and a second sensitivity different from the first sensitivity. At least one mask is placed between at least one radiation source and the first and second radiation-sensitive materials. The mask has a plurality of substantially radiation-transparent apertures. The first and second radiation-sensitive materials are then exposed to a plurality of radiation beams through the radiation-transparent apertures in the mask to form a first construct in the first radiation-sensitive material and a second construct in the second radiation-sensitive material. The first construct and the second construct cooperate to form the radiation-cured structure.
摘要:
A micro-truss based blast protection apparatus. In one embodiment, the blast protection apparatus includes a three-dimensional (3D) ordered truss core between a first face plate and a second face plate. The 3D ordered truss core includes first truss elements defined by first self-propagating polymer waveguides and extending along a first direction, second truss elements defined by second self-propagating polymer waveguides and extending along a second direction, and third truss elements defined by third self-propagating polymer waveguides and extending along a third direction. The first, second, and third truss elements interpenetrate each other at a plurality of nodes to form a continuous material. The first, second, and third truss elements define an open space for providing a densification in response to a force applied to the first face plate and/or the second face plate, and the 3D ordered truss core is self-supporting.
摘要:
In one possible implementation, a thermal plane structure includes a non-wicking structural microtruss between opposing surfaces of a multilayer structure and a thermal transport medium within the thermal plane structure for fluid and vapor transport between a thermal source and a thermal sink. A microtruss wick is located between the opposing surfaces and extends between the thermal source and the thermal sink.
摘要:
A three-dimensional micro-truss structure includes: a plurality of first struts extending along a first direction; a plurality of second struts extending along a second direction; a plurality of third struts extending along a third direction; and a plurality of fourth struts extending along a fourth direction, wherein the first, second, third, and fourth struts interpenetrate one another at a plurality of nodes and wherein at least one of the first, second, and third directions extends at a non-perpendicular angle with respect to a plane, the plane being substantially perpendicular to the fourth direction.
摘要:
A fuel cell component is provided, including a substrate disposed adjacent at least one radiation-cured flow field layer. The flow field layer is one of disposed between the substrate and a diffusion medium layer, and disposed on the diffusion medium layer opposite the substrate. The flow field layer has at least one of a plurality of reactant flow channels and a plurality of coolant channels for the fuel cell. The fuel cell component may be assembled as part of a repeating unit for a fuel cell stack. A method for fabricating the fuel cell component and the associated repeating unit for the fuel cell is also provided.