摘要:
A coating composition is provided comprising: (i) a fluorinated polymer comprising (a) structural units having the formula (I): —CR1R2—CFX— (I) wherein R1 and R2 are each independently an alkyl group, a fluorine atom, a chlorine atom, a hydrogen atom or a trifluoromethyl group, and X is a fluorine atom, a chlorine atom, a hydrogen atom or a trifluoromethyl group, and (b) structural units comprising at least one type of crosslinkable functional group; (ii) a crosslinking agent; and (iii) a plurality of particles functionalized with a functional group, wherein the functional group on the particles is essentially non-reactive with the fluorinated polymer and with the crosslinking agent. Articles comprising a coating composition described in embodiments of the invention are also provided.
摘要:
A method for making an article with controlled surface wettability is provided. The method includes the steps of providing a substrate including a polymer; and inducing a phase transformation at a selected surface region of the substrate, such that the phase transformation forms a texture at the selected surface region. The texture includes a plurality of features having a largest characteristic dimension of up to about 50 microns. An article with controlled wettability is provided. The article has a selected surface region including a polymer. At least about 80% of surface area includes a plurality of features having a largest characteristic dimension of up to about 50 microns. The plurality of features further includes a plurality of nanoscale surface features and the selected surface region has the surface wettability sufficient to generate, with a reference fluid, a static contact angle of at least about 120° C.
摘要:
An article comprises a textured surface disposed on a substrate. The surface has an effective liquid wettability sufficient to generate, with a reference liquid, a contact angle in a range from about 120° to about 180°. The surface comprises a material having a nominal liquid wettability sufficient to generate, with the reference liquid, a nominal contact angle in a range from about 60° to about 90°, the material comprising at least one material selected from the group consisting of a polymer and a ceramic. The properties of the surface may include low-drag or low-friction, self-cleaning capability, and resistance to icing, fouling, and fogging, and the like. Methods of making such a surface are also described.
摘要:
An article comprising a surface portion is provided. The surface portion has a plurality of primary features, and the primary features have a height dimension in the range from about I micron to about 500 microns, an aspect ratio in the range from about 0.5 to about 10, and a spacing dimension in the range from about 0.5 to about 50 feature width units. The surface portion comprising the features has a wettability of the surface sufficient to generate, with a reference fluid, a static contact angle of greater than about 120 degrees and a total transmission of at least about 70% in the visible range of electromagnetic radiation.
摘要:
Articles having surfaces with enhanced wetting properties are presented. One embodiment is an article having a surface configured for promoting a phase transformation from a liquid phase to a vapor phase. The article comprises an element comprising a surface disposed to be in contact with a liquid to be transformed to a vapor, and the surface comprises a plurality of surface features having a median feature size, a, and a median feature spacing, b, such that the ratio b/a is up to about 8. The surface comprises a material disposed to contact the liquid, and this material has a nominal wettability sufficient to generate a nominal contact angle of up to about 80 degrees with a drop of the liquid. Another embodiment is a fuel rod for a nuclear reactor comprising a surface configured as described above.
摘要:
An apparatus for the transfer of heat is presented. The apparatus comprises a textured heat transfer surface disposed to promote condensation of a vapor medium to a liquid condensate, the surface comprising a plurality of surface texture features disposed on the heat transfer surface. The plurality of features has a median size, a median spacing, and a median height displacement such that the force exerted by the surface to pin a drop of condensate to the surface is equal to or less than an external force acting to remove the drop from the surface. Also included are heat pumps, systems for power generation, and distillation systems comprising the apparatus.
摘要:
An article having low wettability is presented. The article comprises a body portion and a surface portion disposed on the body portion. The surface portion comprises a plurality of features disposed on the body portion, and the features have a size, shape, and orientation selected such that the surface portion has a wettability sufficient to generate, with a reference liquid, a contact angle of at least about 100 degrees. The features comprise a height dimension (h) and a width dimension (a), and are disposed in a spaced-apart relationship characterized by a spacing dimension (b). The ratio of b/a and the ratio of h/a are such that the drop exhibits metastable non-Wenzel behavior.
摘要翻译:提出了一种具有低润湿性的物品。 该物品包括主体部分和设置在主体部分上的表面部分。 表面部分包括设置在主体部分上的多个特征,并且特征具有选择的尺寸,形状和方向,使得表面部分具有足够的润湿性,足以产生与参考液体至少约 100度。 特征包括高度尺寸(h)和宽度尺寸(a),并且以间隔尺寸(b)为特征的间隔关系设置。 b / a和h / a的比率使得下降呈现亚稳态非Wenzel行为。
摘要:
A grant that includes a resource allocation for a subframe set may be communicated. The subframe set may include a subframe resource and another subframe resource following the subframe resource. Sensing, during a sensing time prior to utilization of the subframe resource, that the unlicensed spectrum is available may be performed. Transmitting, based on the sensing, data on the subframe resource and the another subframe resource without further sensing may also be performed.
摘要:
A cryogenic cooling system includes a chamber defined by an outer wall and an inner wall, the chamber housing at least one component to be cooled; a wicking structure in thermal contact with one of the outer wall and the inner wall of the chamber; and a delivery system in a spaced apart relationship with the chamber and fluidly connected to the wicking structure for transporting a working fluid to and from the wicking structure. Also provided is a magnetic resonance imaging system including the cryogenic cooling system.
摘要:
Provided are compositions for controlled release of biomolecules, which comprise conjugates of polymers and biomolecules conjugated through non-covalent interactions. Also provided are methods for controlled release of biomolecules and their use in biochips.