Keyword: Polymers

Briefs: Mechanical & Fluid Systems

This work involved designing a liquid nitrogen cold-plate heat exchanger with a high thermal mass using code-standard, high-pressure tubing. High thermal mass requires a substantial amount of...

Briefs: Manufacturing & Prototyping

Fiber metal laminates (FMLs) are multicomponent materials utilizing metals, fibers, and matrix resins. Tailoring their properties is readily achievable by varying one or more of these...

Briefs: Manufacturing & Prototyping
All-Organic Electroactive Device Fabricated with Single- Wall Carbon Nanotube Film Electrode

A novel, all-organic electroactive device system has been fabricated with a single-wall carbon nanotube (SWCNT) film used as an alternative electrode. This system was fabricated with LaRC-Electro Active Polymer (LaRC-EAP) active layer and the SWCNT films...

INSIDER: Electronics & Computers

Portable electronics — typically made of non-renewable, non-biodegradable and potentially toxic materials — are discarded at an alarming rate in consumers' pursuit of the next best...

Briefs: Manufacturing & Prototyping
Making Flexible Ablators that are Flexible Char Formers

An approach was developed for making low-density, flexible ablators for a thermal protection system (TPS) from a flexible fibrous carbon substrate and a polymer resin. The material is foldable and stowable, and can be deployed in space without compromising performance. In addition, the...

Briefs: Materials
Fibers of Aligned Single-Wall Carbon Nanotubes and Process for Making the Same

Single-wall carbon nanotubes (SWNTs) are fullerenes of closed-cage carbon molecules typically arranged in hexagons and pentagons. Commonly known as “buckytubes,” these cylindrical carbon structures have extraordinary properties, including high electrical and...

Briefs: Electronics & Computers

Sensors have improved in terms of size, capability, and power consumption, but their deployment in remote areas is limited by battery power supplies. Using piezoelectric (PE) materials for energy...

Application Briefs: Robotics, Automation & Control

Rack and pinions are linear actuators that play a critical role in a wide range of linear motion control applications. While rack and pinions are commonly thought of as a timeless...

Articles: Photonics/Optics

With the standardization of 4G wireless, the increase in cloud storage and computing, and the push for faster network data rates, the highest quality passive interconnect systems must be used. While the robustness and...

Briefs: Manufacturing & Prototyping
Atmospheric Pressure Plasma-Based Fabrication of Printable Electronics and Functional Coatings

The need for low-cost and environmentally friendly processes for fabricating printable electronics and biosensor chips is growing. Nanomaterials have proved to be very useful in both printable electronics due to their electronic properties, and in...

Briefs: Mechanical & Fluid Systems
Diminutive Assembly for Nanosatellite deploYables (DANY) Miniature Release Mechanism

CubeSat appendices such as solar panels and antennas often need to be constrained by a release mechanism during launch. These appendices are then deployed once the desired orbit is reached. The usual constraint method used is a combination of an unpredictable/...

Briefs: Medical
Rapid Polymer Sequencer

Solid-state, nanopore-based analysis of nucleic acid polymers is the only technique that can determine information content in single molecules of genetic material at the speed of 1 subunit per microsecond. Because individual molecules are counted, the output is intrinsically quantitative. The nanopore approach is more...

Briefs: Test & Measurement
High-Energy Instrumentation for Small Satellite Platforms

Given the increased availability of small satellite opportunities either through CubeSats or the Air Force’s University Nanosat program, and the limited availability of larger platforms, it is challenging to develop new instrumentation that not only fits within the envelope of small...

Briefs: Test & Measurement
Device for Direct Measurement of the Diffusivity and Molecular Release Through Membranes and Filters

Concentration-driven molecular diffusion is a fundamental phenomenon essential for the transport of nutrients in cells, for oxygen exchange in the lungs, and mating of chemicals in industrial reactors and the food industry. Thus, diffusion plays...

Briefs: Sensors/Data Acquisition
Load-Indicating Sensor for Lines and Cords

During the development of parachute systems, it is desirable to size the lines correctly, and to pack and deploy the parachute in a manner that produces uniform loading among the lines. Analytical methods would greatly reduce the cost of development; however, test verification is essential. This is...

INSIDER: Electronics & Computers

By analyzing such parameters as the force applied by key presses and the time interval between them, a new self-powered, non-mechanical, intelligent keyboard could provide a...

Briefs: Materials
Negative Dielectric Constant Material Based on Ion-Conducting Materials

Metamaterials, or artificial negative index materials (NIMs), have generated great attention due to their unique and exotic electromagnetic properties. A negative dielectric constant material, which is an essential key for creating the NIMs, was developed by doping ions into...

Briefs: Materials
Insulating Materials and Precursor Formulations, and Method of Forming

Methods were developed for forming an insulating material that combines a polysilazane, a cross-linking compound, and a gas-generating compound to form a reaction mixture, and curing the reaction mixture to form a modified polysilazane. The gas-generating compound may be...

Briefs: Materials
Selective Clay Placement Within a Silicate Clay-Epoxy-Blend Nanocomposite

The dispersion of a layered silicate into an epoxy matrix often increases the material strength and stiffness, but reduces resin toughness. This innovation is a method to selectively place organically modified clay within specific regions of an epoxy blend, where the clay...

Briefs: Semiconductors & ICs
Mechanically Induced Nucleation Improves Crystalline Quality During Melt Growth of Semiconductors

For certain semiconductors with important applications, the existing bulk crystal growth technique from the melt usually results in poor-quality multi-crystalline ingots that cause the typically low yield of the commercial growth process. The...

Briefs: Materials
Modeling Transmission Effects on Multilayer Insulation

Recent experimental results within the NASA community have shown apparent degradation in the performance of multilayer insulation (MLI) when used in low-temperature applications, e.g., in liquid hydrogen tanks. There was speculation that this degradation was due to the appearance of...

Briefs: Materials
Low-Weight, Durable, Low-Cost Metal Rubber Sensor System for Ultra-Long-Duration Scientific Balloons

Large axial load forces and extreme temperature ranges are typical for scientific balloon missions. Therefore, a durable, flexible, and thermally stable sensor material is needed. In this innovation, sensors have been designed to be integrated...

Articles: Materials

Epoxies are versatile polymer systems that are “go-to materials” for electrical, electronic, and microelectronic systems, especially in applications where outstanding electrical insulation...

Products: Lighting

DELO (Windach, Germany) now offers a new, high-intensity LED spot lamp with a wavelength of 400 nm. The DELOLUX 50 allows for fast, reliable, pinpoint curing of adhesive layers with thicknesses up to 10 mm, making it suitable...

Briefs: Electronics & Computers

This innovation is an electric field “illumination” system that is a companion component to the e-Sensor. This generator, when combined with the e-Sensor, enables a new, nondestructive inspection...

Briefs: Lighting

High-tech specks called quantum dots could bring brighter, more vibrant color to mass market TVs, tablets, phones and other displays. A new technology called 3M quantum dot enhancement...

Briefs: Physical Sciences
Nanosensor/Cellphone Hybrid for Detecting Chemicals and Concentrations

Nanosensors have been developed for chemical detection using carbon nanotubes (CNTs). Unlike other chemical sensors, this solid-state approach requires no reagents and can be refreshed with a solid-state ultraviolet (UV) diode. The sensors possess high sensitivity (ppbv),...

Briefs: Sensors/Data Acquisition
Coated or Doped Carbon Nanotube Network Sensors as Affected by Environmental Parameters

Chemical sensors have been developed over the past decades to detect gases and vapors at various concentration levels for deployment in a wide range of industrial applications. The detection usually centers on a change of a particular property or status of...

Briefs: Materials
Ultra-High-Temperature Ceramic Composites with SiC Reinforcements

Future-generation materials for use on space transportation vehicles require substantial improvements in material properties, leading to increased reliability and safety, as well as intelligent design to allow for current materials to meet future needs. Ultra-high-temperature...

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