Glass bubble,Hollow glass microspheres , Glass sphere beads, Manufacturer & suppliers

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.

In recent years, the demand for sealant in the construction field has been increasing, among which the silicone sealant is widely used and has a large amount. The silicone sealant is prepared with polysiloxane as the main raw material, and its molecular chain is composed of siloxane chain, which is cross-linked to form a network of siloxane chain skeleton structure during the curing process. The bond energy of Si-0 (444 kJ/mol) is very high, which is not only much higher than the main chain bond energy of other ordinary polymers, but also higher than the UV light energy (399 kJ/mol). Therefore, Si-0 has excellent high and low temperature resistance, weather resistance and UV light aging resistance.

5235 special silicone modified polyester resin is a specially treated silicone modified polyester resin with excellent film-forming property, high gloss, high temperature resistance, high hardness baking resin, excellent physical compatibility and excellent storage stability. The hardness reaches 7H after complete curing on stainless steel plate.

1) High hardness and good toughness: the surface hardness of stainless steel substrate can reach 7H after curing and film forming;

2) Good adhesion: it can reach grade 0 on metal substrates such as stainless steel, and some substrates can reach grade 1; 3) High fullness, high gloss, leveling;

4) High transparency: the paint film is colorless and transparent, with light transmittance ≥ 92%; (Various colors can be modulated by yourself)

5) Good heat resistance: varnish resin can withstand 350 ℃ high temperature for a short time;

6) With excellent storage stability, it can grind various high-temperature resistant color pastes

7) Excellent compatibility with any other silicone polyester resin

8) It can be solidified to form film in the temperature range of 180-280 ℃

Application range of resin:

1. Used separately for high-temperature resistant coatings, such as hairpin coating, non-stick pot coating, high-temperature resistant industrial coating, etc

2 Grind various high-temperature resistant color pastes

3. Mix with other resins to improve heat resistance and luster

4. Replacement of general nano-silicone resin

In addition, silicone sealant is also a good adhesive material. Its adhesive performance to glass is very excellent, and it is often used for sealing and bonding of double-layer insulating glass. Reinforcing filler accounts for a relatively high proportion in the formula of silicone sealant, and the commonly used ones include Nanomaterial calcium carbonate, fumed silica, carbon ink, etc. When the nanomaterial calcium carbonate is used as reinforcing filler, the dosage can reach 60% of the total mass of the system. In addition, some silicone sealants will also add incremental fillers to reduce costs, adjust and improve thixotropy and fluidity. The commonly used incremental fillers are heavy calcium carbonate. The common feature of the above fillers is that the density is high, such as the density of Nanomaterial calcium carbonate is 2.7g/cm3, which also leads to the high density of the final product sealant, and the density of most silicone sealant is about 1.5g/cm3. Hollow glass microsphere, also known as hollow glass microsphere, is a lightweight inorganic powder material developed in recent years.

Hollow glass beads are borosilicate glass formed at high temperature (>1400 ℃) and have stable chemical properties. The hollow glass bead is a hollow, thin-walled closed spherical structure with thin gas inside. This special structure makes it have the characteristics of low density, low thermal conductivity and high compressive strength. The true density of hollow glass bead is 0.12-0.70g/cm3, and the thermal conductivity is 0.038-0.085 W/(m · K). It can be used as a semi-reinforcing filler in silicone sealant, effectively reducing the density and thermal conductivity of the sealant, and also improving the thermal deformation temperature of the sealant. In addition, hollow glass beads generally do not react with substrates or other substances, and are suitable for a variety of systems.

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.

Glass microsphere has the advantages of light weight, low thermal conductivity, non-toxic, incombustible, good chemical stability and high dispersion. These advantages can be reflected in the finished products after molding. The final product is light in weight, easy to install, and especially suitable for manufacturing products requiring buoyancy.

Hollow glass beads can be used in many material fields to improve or improve the water resistance, compressive strength, shrinkage and impact strength of materials. Low density, can make lighter parts; The porosity and specific surface area are low, and the bead absorption resin is less, so the viscosity is not high even if the amount of filling is high; It is chemically stable and inert; Good anti-cracking performance, and the final product is easy to be post-processed, such as drilling, cutting and polishing, which is another advantage that hollow glass beads are easy to be damaged.

Because, like the shock absorber, the compressive strength and impact strength of the product are also improved.

Because the hollow glass bead is destroyed prior to the resin matrix, the impact degree of the product is reduced.

It is an advantage. On the one hand, it can reduce

Application of glass beads in synthetic foam

Glass bead resin composite is usually called synthetic foam. The main feature of this composite material is its low density. It is a multifunctional composite material with wide mechanical properties and a combination of vibration reduction, insulation and fire prevention.

2 Application of glass beads in plastics and rubber

In the plastic industry, glass bead is an inorganic powder filler developed in recent years, with high filling capacity. The plastic filled with it has excellent rheological processing properties, uniform shrinkage, and increased impact resistance. Glass bead is used for filling UHMWPE material, which not only acts as a solid lubricant to improve processing fluidity, but also modifies the comprehensive mechanical properties of UHMWPE material to improve its strength and wear resistance

The tensile strength, impact strength, hardness and other mechanical properties of nylon 6 with glass beads are improved, and the material aging caused by light and heat can be prevented. With the increase of glass bead content, the Martin heat resistance temperature of the material increases.

Application of glass bead in spacer material of liquid crystal display (LCD)

The spacer material of liquid crystal display is the focus of research at home and abroad, which is also one of the more promising applications of glass beads [7]. At present, LCD spacer materials often use various organic particles, and also use ground optical fibers. These materials have different degrees of shortcomings

Application of glass bead in explosives

The introduction of hollow glass beads into emulsion explosives overcomes the above shortcomings, greatly improves the detonation performance of explosives and significantly improves the storage stability

5 Application in cement products

The density of hollow microsphere is low and it is not easy to absorb water. It can reduce the density of grouting cement by adding it alone or together with expansion additives

6 Application in coatings

The glass bead is applied to the coating, and the solar heat reflection and thermal insulation coating prepared has high solar heat reflection and high radiation performance, which improves the thermal insulation performance of the coating, and is used in reflective pavement and decoration and beauty joints

7 Application in medical field

Coupling treatment of hollow glass microspheres and electroless nickel plating on the surface of hollow glass microspheres

After sex, it has a promising prospect in medical immunoassay technology.

Application of modified glass beads in electromagnetic shielding and microwave absorption

Glass beads are widely used in building materials, plastics, rubber, coatings, chemistry, metallurgy, navigation, aerospace and other fields, and have irreplaceable important applications. The modified hollow microspheres have electrical and magnetic properties, which can be used in the fields of microwave absorption or electromagnetic shielding to prepare functional materials and broaden its application range. Due to the high energy consumption of artificial glass beads, the cost of glass beads obtained from fly ash can be greatly reduced, so the bead filler will have a good development prospect. At present, the utilization of fly ash hollow microsphere in China is still at the initial stage, and the utilization rate and utilization level need to be developed. As a new multi-functional material, its application prospect will be better and better.

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.

Glass microsphere plays a very important role in production and life. Glass microsphere not only has the advantages of light weight, low thermal conductivity, high strength and good chemical stability, but also has hydrophilic and hydrophobic properties on the surface, which is easy to disperse in organic material system. What are the main characteristics of glass beads?

Main characteristics of glass bead

1. It can scatter light in the visible spectrum. The glass material is actually colorless and transparent, but because the glass bead has a scattering effect on the light in the full visible spectrum, it looks white. However, when it is added to colored materials, it also scatters the light of material color, so it can be widely used in any material with requirements for appearance color without affecting the original material color.

2. Low density. The density of glass bead is about one tenth of that of traditional filler particles. After filling, the base weight of the product can be greatly reduced. The larger volume makes it replace a large number of other raw materials, reducing the product cost.

3. It is lipophilic. Hollow glass beads are easy to wet and disperse, and can be filled in most thermosetting thermoplastic resins, such as polyester, epoxy resin, polyurethane, etc.

4. High dispersion and good liquidity. Because the glass bead is a tiny ball, it has better fluidity in liquid resin than the filler in sheet, needle or irregular shape, so it has excellent filling performance. More importantly, this kind of small bead is isotropic, so it will not produce the disadvantage of inconsistent shrinkage in different parts due to its orientation, which ensures the dimensional stability of the product and will not warp.

5. Low water absorption. The inside of glass bead is thin gas, so it has the characteristics of sound insulation and heat insulation, and is an excellent filler for various heat insulation and sound insulation products. The thermal insulation characteristics of glass beads can also be used to protect products from thermal shock caused by alternate changes between hot and cold conditions. Its high specific resistance and extremely low water absorption make it widely used for processing and producing cable insulation materials.

6. Low oil absorption. The particle size of the sphere determines that it has the smallest specific surface area and low oil absorption. The amount of resin can be greatly reduced in the use process, and the viscosity will not increase much even under the premise of high addition, which greatly improves the production and operation conditions, and can increase the production efficiency by 10%~20%.

ARTICLE SOURCE: haixumoliao