Archive for the ‘Hollow Glass Microspheres’ Category

High-damping polyurethane hollow glass microspheres are a type of lightweight filler material used in the production of composites. These microspheres are made from hollow glass particles that are coated with a layer of polyurethane material. The resulting material is a lightweight, high-strength filler that can be used to reduce the weight of composite materials without compromising their strength and durability.

One of the key advantages of high-damping polyurethane hollow glass microspheres is their high damping capacity, which allows them to absorb vibrations and impact energy. This makes them particularly useful in applications where shock absorption and impact resistance are important, such as in the aerospace, automotive, and marine industries.

In addition to their high damping capacity, high-damping polyurethane hollow glass microspheres also offer other benefits such as low thermal conductivity, low dielectric constant, and low water absorption. They can also be easily incorporated into a variety of composite materials, including plastics, resins, and rubbers.

Hollow glass microspheres (HGMs) are a type of lightweight material that have been studied for their potential application in hydrogen gas storage. Hydrogen has been identified as a promising alternative fuel source, but it is difficult to store due to its low density and high reactivity. HGMs, with their high surface area and low density, have the potential to overcome some of the challenges of hydrogen storage.

Hollow glass microspheres can be used as a support material for metal hydrides, which are compounds that can store hydrogen in a solid state. The hollow glass microspheres provide a high surface area for the metal hydride to adhere to, which increases the storage capacity of the material. The hollow nature of the HGMs also allows for the easy diffusion of hydrogen into and out of the material, which is critical for efficient storage and release of the gas.

Research has shown that hollow glass microspheres can significantly improve the hydrogen storage capacity of metal hydrides. Additionally, HGMs have the advantage of being lightweight and easy to handle, making them attractive for use in portable hydrogen storage applications.

Hollow glass microspheres are used in a number of applications that require their introduction into a matrix material through a variety of mixing operations.

In order to survive this processing, the spheres must be able to withstand tremendous pressures. To characterize the strength of the hollow glass microspheres as well as a comprehensive understanding of sphere mechanical properties, equipment was designed and constructed that could individually test spheres.

By the use of Classical Buckling Theory for isostatic compression and by developing a theory for failure under uniaxial compression, hollow glass microsphere strength can accurately be determined.

Established cell isolation and purification techniques such as fluorescence-activated cell sorting (FACS), isolation through magnetic micro/nanoparticles, and recovery via microfluidic devices have limited application as disposable technologies appropriate for point-of-care use in remote areas where lab equipment as well as electrical, magnetic, and optical sources are restricted.

We report a simple yet effective method for cell isolation and recovery that requires neither specialized lab equipment nor any form of power source. Specifically, self-floating hollow glass microspheres were coated with an enzymatically degradable nanolayered film and conjugated with antibodies to allow both fast capture and release of subpopulations of cells from a cell mixture.

Targeted cells were captured by the hollow glass microspheres and allowed to float to the top of the hosting liquid, thereby isolating targeted cells. To minimize nonspecific adhesion of untargeted cells and to enhance the purity of the isolated cell population, an antifouling polymer brush layer was grafted onto the nanolayered film.

Using the EpCAM-expressing cancer cell line PC-3 in blood as a model system, we have demonstrated the isolation and recovery of cancer cells without compromising cell viability or proliferative potential. The whole process takes less than 1 h. To support the rational extension of this platform technology, we introduce extensive characterization of the critical design parameters: film formation and degradation, grafting with a poly(ethylene glycol) (PEG) sheath, and introducing functional antibodies.

Our approach is expected to overcome practical hurdles and provide viable targeted cells for downstream analyses in resource-limited settings.

Hollow glass microspheres, also known as microbubbles, glass bubbles, or bubbles, are composed mostly of a borosilicate-soda lime glass combination formulation and have advantages such as strong heat and chemical resistance, as well as low density.

These microspheres can also have conductive coatings applied on them. The adjusted thickness of the conductive coating on microbubbles provides superior shielding and conductivity qualities. Electronics, medical devices, military applications, biotechnology, and a variety of other specialist sectors can all benefit from these.

The hollow glass microspheres have a remarkable spherical form that provides numerous significant benefits, including decreased shrinkage and warpage, better flow/lower viscosity, and greater fill loading.

It also enables the hollow glass microspheres to easily mix into compounds, making them very flexible to a variety of manufacturing processes like as casting, spraying, and moulding.

When heated, the volume increases 50 to 170X depending on the grade used.

Expandable hollow glass microspheres benefits include weight reduction, improved moldability, thermal and sound absorption.

Hollow glass microspheres are a precision foaming agent that are characterized by easy control of specific gravity, retention of closed cells, small sphere diameter and uniform distribution.

Hollow glass microspheres provide the flexibility to be foamed in resin and within high permeability materials such as fibers and paints.

Hollow glass microspheres developed in recent years, are a new type of materials which shows a greater use and an outstanding performance. The product, made mainly from borosilicate, is a hollow microspheres whose grain size is 10-250 micron and wall-thickness 1-2 micron.

Hollow glass microspheres have many advantages substantial weight saving, low heat conductivity, high mechanical strength and fine chemical stability. With treated specially, hollow glass microspheres have the properties of lipophilicity and hydrophobicity and are very easily dispersed in organic materials such as resin. It is widely used in the composite materials such as FRP(fiber reinforced plastics),man-made marble and man-made agate.

Hollow glass microspheres have the distinct results of decreasing weight, sound insulation and heat preservation, thus the products have the excellent performances of anti-crazing and re-processing. Hollow glass microspheres are widely to be used in a range of fields such as aviation, space, new bullet train, luxurious yacht, heat insulating dope, bowling balls and play a unique role.

This new type of hollow glass microspheres are low in density and high in strength, which are able to resist high temperature and acid / alkali corrosion, and show low thermal conductivity and nice electrical insulation.

Hollow glass microsphere is a cross-functional frontier material that can be added to a variety of substrate materials to improve their performances (such as weight-reduction) and environmental benefits (such as building thermal insulation).

Especially under the background of striving to achieve the “carbon peak” and “carbon neutralization” goal, researching and promoting the application of multi-specification hollow glass microspheres in building paints, industrial coatings, cementing slurry, sealants and adhesives, modified plastics, rubber-based products, epoxy tooling board, emulsion explosives, artificial stones and other fields, is of great strategic significance to carbon emission reduction, chemicals storage, aviation and aerospace, petroleum and natural gas mining, 5G communications and military industry for our country.

Screening hollow glass microspheres can be an extremely difficult and tedious process. It requires a combination of technology and technique in order to make the required separations.

The main issue when screening hollow glass microspheres is coating of the screen mesh. The material is so light that it almost floats on the screen and has a hard time passing through the hole opening.

Furthermore, the ingoing feed must closely be metered to avoid overloading the screen.

Global warming can be defined as a gradual increase in the overall temperature of the earth’s atmosphere. A lot of research work has been carried out to reduce that heat inside the residence such as the used of low density products which can reduce the self-weight, foundation size and construction costs.

Foamed concrete it possesses high flow ability, low self-weight, minimal consumption of aggregate, controlled low strength and excellent thermal insulation properties. This study investigate the characteristics of lightweight foamed concrete where Portland cement (OPC) was replaced by hollow glass microsphere at 0%, 3%, 6%, 9% by weight. The density of wet concrete is 1000 kg/m3 were tested with a ratio of 0.55 for all water binder mixture. Lightweight foamed concrete hollow glass microsphere (HGMs) produced were cured by air curing and water curing in tank for 7, 14 and 28 days. A total of 52 concrete cubes of size 100mm × 100mm × 100mm and 215mm × 102.5mm × 65mm were produced.

Furthermore, Scanning Electron Microscope (SEM) and X-ray fluorescence (XRF) were carried out to study the chemical composition and physical properties of crystalline materials in hollow glass microspheres. The experiments involved in this study are compression strength, water absorption test, density and thermal insulation test.

The results show that the compressive strength of foamed concrete has reached the highest in 3% of hollow glass microsphere with less water absorption and less of thermal insulation. As a conclusion, the quantity of hollow glass microsphere plays an important role in determining the strength and water absorption and also thermal insulation in foamed concrete and 3% hollow glass microspheres as a replacement for Portland cement (OPC) showed an optimum value in this study as it presents a significant effect than other percentage.