A nonaqueous electrolyte secondary battery separator, which includes a porous film containing a polyolefin-based resin as a main component, has a difference of not more than 2.5 between (a) a white index measured on a surface of the porous film which has not been irradiated with ultraviolet light having 255 W/m.sup.2 and (b) a white index measured on the surface of the porous film which has been irradiated, for 75 hours, with the ultraviolet light having 255 W/m.sup.2.

An insulating device can include an aperture having a waterproof closure which allows access to the chamber within the insulating device. The closure can help prevent any fluid leakage into and out of the insulating device if the insulating device is overturned or in any configuration other than upright. The closure also prevents any fluid from permeating into the chamber if the insulating device is exposed to precipitation, other fluid, or submersed under water. This construction results in an insulating chamber impervious to water and other liquids when the closure is sealed.

A medical fluid microflow assembly having an assembly fluid inlet and an assembly fluid outlet, and a mandrel having a curved exterior surface, the mandrel being positioned within an cavity of a housing so that the exterior surface of the mandrel is substantially parallel to an interior surface of the cavity, and at least one protrusion positioned helically around and extending from the interior surface of the cavity, each protrusion abutting the exterior surface of the mandrel to form a sealed fluid channel which has a channel inlet positioned proximate to the assembly fluid inlet and a channel outlet positioned proximate to the assembly fluid outlet, the exterior surface of the mandrel and the interior surface of the cavity having a minimal or neutral triboelectric value with respect to a fluid.

The embodiment relates to a balanced propeller and to an extrudable metal polymer composite and process for making and using the composite to make balancing weight strips for marine or boat propellers. Metal particulate of adequate particle size is mixed with a polymer that is extruded or injection molded to form a high-density weighted strip.

A composite membrane, a biosensor, and preparation methods thereof are disclosed. In the preparation process, a moldable and plastic material is used as a carrier; after a dispersion liquid of a nanocarbon material wets the carrier, by means of multiple stretching and folding processes, the nanocarbon material is uniformly distributed and arranged regularly inside the entire plastic material in a stretching strain direction. The prepared composite membrane is elastic, attachable, and cost-efficient, and may detect strains as high as 530%. The composite membrane further has high sensitivity and high durability, and may be effectively applied to a biosensor for monitoring motion and humidity.

The invention generally relates to shape memory films that are tri-functionally crosslinked and that comprise multiple, non-terminal, phenylethynyl moieties. In addition, the present invention relates methods of fabricating such films. Due to the improved properties of such SMPS, the SMP designer can program in to the SMP mechanical property enhancements that make the SMP suitable, among other things, for advanced sensors, high temperature actuators, responder matrix materials and heat responsive packaging.

Inverse origami design for soft robotic development is described herein. A method as described herein can include determining, by a system comprising a processor, shape parameters corresponding to an input shape; generating, by the system based on the shape parameters, an origami crease pattern representative of the input shape, wherein the origami crease pattern comprises respective origami cell units, and wherein the origami crease pattern is defined by a group of vector size parameters corresponding to relative fold lengths associated with the respective origami cell units, a vector angle parameter corresponding to fold angles associated with the respective origami cell units, and a scalar cell height parameter; and imprinting, by the system, the origami crease pattern onto a tangible medium.

The invention generally relates to shape memory films that are tri-functionally crosslinked and that comprise multiple, non-terminal, phenylethynyl moieties. In addition, the present invention relates methods of fabricating such films. Due to the improved properties of such SMPs, the SMP designer can program in to the SMP thermomechanical property enhancements that make the SMP suitable, among other things, for advanced sensors, high temperature actuators, responder matrix materials and heat responsive packaging.

A system and method of constructing a 4D-printed ceramic object includes extruding inks including particles and polymeric ceramic precursors through a nozzle to deposit the inks on a heating plate, whereby a 3D-printed elastomeric object is formed on the heating plate, folding the 3D-printed elastomeric object into a complex structure to form a 4D-printed pre-strained elastomeric object, and converting the 4D-printed elastomeric object into the 4D-printed ceramic object.

A medical fluid microflow assembly having an assembly fluid inlet and an assembly fluid outlet, and a mandrel having a curved exterior surface, the mandrel being positioned within an cavity of a housing so that the exterior surface of the mandrel is substantially parallel to an interior surface of the cavity, and at least one protrusion positioned helically around and extending from the interior surface of the cavity, each protrusion abutting the exterior surface of the mandrel to form a sealed fluid channel which has a channel inlet positioned proximate to the assembly fluid inlet and a channel outlet positioned proximate to the assembly fluid outlet, the exterior surface of the mandrel and the interior surface of the cavity having a minimal or neutral triboelectric value with respect to a fluid.