World Changing Technologies Pte Ltd

Transcription

1 Microbecide PCO Sealant Overview Photocatalyic Oxidation (PCO) Microbecide PCO (Photocatalyic Oxidation) Sealant is a custom manufactured, self-cleaning, photocatalyst surface treatment or coating. Microbecide PCO Sealant uniquely combines Titanium Dioxide (TiO 2 ), Silicon Dioxide (SiO 2 ) and Ionic Silver (Ag + ) to impart an active photocatalytic oxidation function to a coated surface. Non-PCO Sealant coated Water drop Water drop Self-Cleaning Surfaces Generally, detergents reduce the surface tension of water and the contact angle is lowered. When a PCO Sealant coated surface is exposed to light, the contact angle of the sealed surface with water is reduced gradually. After enough exposure to light, the sealed surface reaches superhydrophilicity. In other words, it does not repel water at all, so water cannot exist in the shape of a drop, but spreads flatly on the substrate. The hydrophilic nature of the sealant, coupled with gravity, enables pollutant particles to be swept away following a water stream making the coated surface self-cleaning. PCO Sealant coated Figure-1 Difference between coated and non-coated surface Non-PCO Sealant coated PCO Sealant coated Super Hydrophilicity Microbecide PCO Sealant imparts an active photocatalytic oxidation function to a PCO Sealant coated surface. The coated surface will also exhibit super hydrophilicity features under light irradiation. The contact angle of the surface will be reduced to <10 degrees, which brings the following benefits. Water will not form a water drop on a surface when its contact angle is <10, it will form a complete water film. The water will be in a flat condition on the surface. Generally, cleaning agents reduce the contact angle of water on a surface. This is the hydrophilicity feature. PCO Sealant simulates this feature, so that a single water wash on the surface can reach the same effect as a traditional washing with detergent. PCO Sealant coat on Aluminum panel Washing or wiping the surace with only water, the surface will be cleaned as after a traditional wash with a cleaning agent. PCO Selant promotes transpiration of coated surfaces or objects. If a panel in the compressor of an air condition is coated with PCO Sealant the air conditioning system will show better efficiency. If a building wall is coated with PCO Sealant, the building will need less energy to cool down in summer. The hydrophilic feature can keep the water on the surface and the entire surface can be covered with only a little water. This will prompt its transpiration. The hydrophilicity also makes the coated surfaces self cleaning, they wash clean in rain.

2 Organic pollutant Inorganic pollutant PCO Sealant coated surface (In the presence of light, PCO Sealant will decompose the organic pollutants. Without the adhesion of organic pollutant, any remaining inorganic pollutant on the surface can be easily swept away.) PCO Sealant coated Non PCO Sealant coated Organic Decomposition Feature. When PCO Sealant is exposed to light, it can decompose almost all the organic substance on the surface, which provides the following benefits. When the PCO Sealant decomposes the absorbed organic pollutant on the surface like oil, it will make the surface cleaner, and after the oil is decomposed, other inorganic pollutants will be unlikely to stay on the surface. The surface can be easily washed down by rain or other cleaning methods. The PCO Sealant can also purify the air around the building. PCO Sealant will purify the NOx gas generated by cars. When the building or road side walls are coated, the surface is cleaned and the surronding environment is greatly improved as well. Broad-Spectrum Antibiosis and Anti-Mold There are 2 benefits of this feature. i. PCO Sealant can prevent mold or moss, so it will keep marble and granite buildings cleaner. ii. Broad-spectrum antibiosis provides beneficial results not only to the coated surface but to the surrounding air flow also. Anti-UV Feature PCO Sealant can absorb UV and protect the coated surface. UV light may make some colored surface fade. PCO Sealant can protect the surface from UV damage. Antistatic Feature The antistatic feature can resist static adsorption of small dust such as ash, coal powder, smoke, etc. PCO Sealant coated (Organic and inorganic pollutants are strongly adsorbed on the surface of the wall which is coated with PCO Sealant. Normal surface Antistatic surface Tips: How to take advantage of the super-hydrophilic feature? The super-hydrophilic feature can provide the same effect as a detergent (reduce the contact angle of the surface). Self-cleaning: If there is rain, the PCO Sealant provides a self-cleaning action after rain wash. The rain wash has the same effect as a traditional wash on the surface with detergent. Easy-cleaning: If there is no rain, simply wash the surface using water. A single water wash will have the same effect as a traditional wash with detergent.

3 Advanced Air Purification Solution Microbecide PCO Sealant Objective: Outdoor air purification (car and industry exhausts purification) Indoor air purification (Sick-house Syndrome, VOCs) Air purification device and filter industry Solution: PCO Sealant is a next generation of air purification technology, which can treat air pollutions caused by more than 85% kinds of harmful gases such as car exhausts NOx, formaldehyde, benzene, VOCs. At the presence of light, PCO Sealant produces hydroxyl radicals and holes (h + ), which react with organic materials and harmful gases to produce water and carbon dioxide. There is no extra pollution in the whole purification process. PCO Sealant reacts as a catalyst in the chemical reaction so that its performance will continue for extended time and it will never be consumed. Features: Purify most air pollution include NO x and VOCs 100% mineralize harmful gas to H 2O and CO 2 Environmental-friendly, no extra pollution Organic pollutant decomposition Catalytic action mode, longtime performance Odor control Broad-spectrum antibiosis Benefits: HEPA 1 ES Filter 2 Ozone UV 3 Minus-Ion PCO Sealant Mold Good Normal Good Good Normal Excellent Germs Excellent Normal Good Good Normal Excellent Virus Normal Normal Normal Normal Normal Excellent Dust Mite Excellent Good Normal Normal Normal Normal Toxicant Normal Normal Good Good Normal Excellent Odor Normal Normal Good Normal Good Excellent Smoke Good Good Good Normal Excellent Good VOCs Normal Normal Good Good Normal Excellent Allergen Good Good Good Normal Excellent Excellent 1 Notes: High Efficiency Particulate Air Filters 2 Electrostatic Filters 3 Ultraviolet

4 Typical PCO Sealant Decomposition Pollutant Source ChemicalReaction Ammonia Acetaldehyde Acetic acid Methane Carbon monoxide Nitrogen oxide Formaldehyde Urine, Garbage, Sweat, Smoke Garbage, Smoke, etc. Garbage, Smoke, etc. Gas fuel, Garbage, etc. Car exhaust, Smoke, etc. Car exhaust, Smoke, etc. Binder, Resin, Paint, etc. Notes: 1. The above table show that the end product of PCO Sealant's photocatalytic reaction is completely safe to humans and does not pose a secondary pollution risk. 2. The mark means this component is available in the end product of relative reaction. End Product N 2, H 2O CO 2 - O 2 NO 3 2NH 3+6OH N 2+6H 20 2 CH 3CHO+6OH+O 2 2CO 2+5H 2O CH 3COOH+4OH+O 2 2CO 2+4H 2O CH 4+4OH+O 2 CO 2+4H 2O CO+2OH CO 2+H 2O 2NO+4OH N 2+2O 2+2H 2O HCHO+4OH CO 2+3H 2O

5 Next Generation Building Cleaning Solution Microbecide PCO Sealant Objective: Buildings - self cleaning, protection and energy saving. Roads - self-cleaning, protection and car exhaust purification Solution: Microbecide PCO Sealant is a combination of TiO 2, SiO 2 and Ag + technology. Just simply spraying PCO Sealant on the building exterior surface will provide excellent features to the building. Also, PCO Sealant can be sprayed on roads and road sides to provide self-cleaning & air purification functions to the road. PCO Sealant can keep the building or road in a very new apperance and reduce cleaning & environment protection costs and water consumption. Features:./ Super hydrophilicity./ Organic pollutant decomposition. / Broad-spectrum antibiosis and anti-mold./ Anti-UV protection./ Surface antistatic./ Self-cleaning./ Easy-cleaning Benefits: Y Keep buildings looking new and clean Y Protect the surface from dust, acid rain and air pollutant damage Y Purify the air of pollutants near and on the surface (e.g. car exhausts NOx, Formaldehyde, Benzene, VOCs) Y Decompose organic pollutants on the surface (e.g. oil, graffiti) Y Leave the surface without water stain after raining Y Reduce energy consumption for cooling buildings in summer Y Prevent mildew or alga growing Y Absorb the UV from the sun and protect the surface from UV damage Y Prevent electrostatic adsorption of pollutants

6 Example.1 Surface: Product: Organic pollutant decomposition Marble Apply Method: Spray PCO Sealant Period: 24 hours Write TEST 9/6 by orange pen on the marble without PCO Sealant coat on 9 th June. Write TEST 9/6 by orange pen on the marble coated with PCO Sealant on 9th June. On 10 th June, the graffito had infiltrated through the marble without PCO Sealant coat. On 10 th June, the graffito on the marble coated with PCO Sealant had been decomposed. d

7 Example.2 Surface: Product: Exterior wall self-cleaning Granite PCO Sealant Apply Method: Spray Period: 3 months This picture shows a granite wall which is old and dirty after years of weathering. The area divided by yellow adhesive tape is to be coated. (Photo #1 dated Dec. 14 t ) Before PCO Sealant is applied to the surface, pre-cleaning work is necessary. The granite wall is washed and cleaned of deposit stains and pollutants. If possible, cleaning the surface with suitable chemical solvent is recommended. The left part of the cleaned area was coated. (Photo #2 dated Dec. 14 t ) After 3 months weathering, the wall coated shows obvious self-cleaning function. The right part without PCO Sealant becomes dirty and dark under the poor air condition of the metropolis. It will be close to the no cleaned area again after several months.

8 Example.3 Surface: Product: Exterior column self-cleaning Granolith PCO Sealant Apply Method: Period: Spray 102 days Day1: 40 years old granolithic column had been cleaned with improper strong acidic cleaning agent. The structure of granolithic covering had been destroyed; air, dust & pollutants had been retained on column base after raining as photo 1 dated Lower part of the stained column base would be cleaned & sealed with PCO Sealant. (Photo #1 dated Jul. 18 th 2005) Day1: Lower part of column base (below the taped area) had been cleaned with cleansing agent. Dirt & stain had been removed off the stained area. PCO Sealant was applied to the sealed area of column base. (Photo #2 dated Jul. 18 th 2005) Day 36: The unsealed area- upper part of the column base was found dark & dirty while the area sealed, (lower part of the column) was found white & clean. (Photo #3 dated Aug. 25 th 2005) Day 102: The unsealed area became dark as a result of contamination by air & organic pollutants. Decomposition of pollutants & selfcleaning test on granolithic covering works & succeeds. (Photo #4 dated Oct. 29 th 2005)

9 Example.4 Surface: Product: Exterior aluminum self-cleaning PVDF coated aluminum panel Apply Method: Spray PCO Sealant Period: 5 months This case is for a PVDF coated aluminum panel, it is new but easy to dirty. After wash by commercial cleaning agent and water, the left part was coated with PCO Sealant. This photo is taken at 5 months after coating. The above photo is treated by monochrome digital photo technology, it can show the dirty and difference between coated and non-coated part more clearly.

10 d World Changing Technologies Pte Ltd Example.5 Surface: Product: Apply Method: Exterior glass self-cleaning & hydrophilic Glass curtain facade PCO Sealant Spray The part with PCO Sealant shows hydrophilic feature, and has an excellent transparent appearance.

11 Suggested applications of super-hydrophilic technology Division Function Application Cleaning easiness Tunnel lighting, Tunnel wall, Clear soundproof wall Materials for a road Traffic sign, Lightning, Soundproofed wall, Guardrail, Self Cleaning by a rainfall Decorative laminated panel and Reflector on a read Anti-fogging property Road mirror Parts of a Kitchen, a Bathroom and Interior Cleaning easiness furnishings Exterior tiles, Siding boards, Window, Sash, Screen Materials for a house Self Cleaning by a rainfall door, Gate door, Roof, Sun parlor, Handrail of a verandah Anti-fogging property Mirror of a Bathroom and a Dresser Accelerated drying Toilet, Window, Bathroom Window, Sash, Curtain wall, Painted steel plate, Materials for a tall building Self Cleaning by rainfall Aluminum panel, Tile, Building stone, Crystallized glass, Glass film Cleaning easiness Showcase Materials for a store Self Cleaning by rainfall Signboard, Fingerpost, Show window, The exterior of a store Anti-fogging property Refrigerated showcase Materials for agriculture Self Cleaning by rainfall, Preventing dewdrops forming Plastic and Glass greenhouse Cleaning easiness Computer display Materials for an electric Self Cleaning by rainfall Upper glass of a solar cell, Insulator and electronic instrument Heat exchanger of an air conditioner, High-voltage Preventing dewdrops forming cable Painting and Coating of vehicles, The outside of Self Cleaning by rainfall windows, Headlights Materials for vehicles Anti-fogging property Preventing dewdrops forming The inside of windows, Glass film, Helmet visor Side view mirror, Rearview mirror and Windshield of a motorcycle, Side mirror film Materials for optical instrument Anti-fogging property Optical lens Materials for medical instruments and supplies Bio-compatibility Contact lens, Catheter Cleaning easiness Tableware, Kitchenware Daily necessities and Self Cleaning by rainfall Spray of anti-fouling coat Consumer products Anti-fogging property Spray of anti-fogging coat, Anti-fogging film Paint All properties mentioned above Paint, Coat

12 TiO2 World Changing Technologies Pte Ltd 1. Application Overview Electrostatic spraying is the recommended application method for applying PCO Sealant. Other methods include r ol l i ng, dipping and brushing. If you have any questions please contact us at service@wctinfo.com. 2. Electrostatic Sprayer Application Method The electrostatic sprayer method is the most popular & recommended application method for applying PCO Sealant. The electrostatic sprayer produces super fine atomized particles that are sprayed onto the surface to be treated. The electrostatic sprayer deposits a microscopic film of PCO Sealant. Typical recommended surfaces to apply this method of application are: Walls, paint surface, marble, granite, building, glass, ceiling, ceramic, tile, carpet, paper and etc 3. Rolling & Brushing Application Method Rolling is a simple & easy method to apply PCO Sealant. PCO Sealant can be rolled or brushed onto a surface such as a building's exterior wall. Rolling or brushing a coating onto a surface wiill be more costly as the film will be much thicker and more PCO Sealant could be used. The typical objects suggested for this method include: Walls, paint surfaces, granite, marble, tile, metal and etc 4. Dipping Application Method The dipping method may be used in industrial application or small subject treatment like bulbs. Dip the subject to be treated into PCO Sealant directly and dry it under ambient temperature or heat it below 200 Celsius degree. Typical subjects suggested to apply this method are: Air filters, water filters, key parts of air / water purification systems, bulbs, fabrics, clothes, mops, rags, food containers such as plates, etc

13 4. Spray Guidance 1. Before spraying When using unfamiliar equipment or coatings, always test on a small area before treating the entire surface. 2. Spray pattern 1) Apply PCO Sealant in an over-lapping spray-pattern to ensure an even coverage of coating. 2) The target surface should just barely glisten with the coating. Do not over-saturate the surface; if you see runs or puddles it means you are wasting PCO Sealant. Check to make sure the newly-coated surface is very slightly damp. 3) When you have coated an area by accident, wipe off the solution immediately. It is very difficult to remove once it has begun to dry. 4) The optimal spraying distance from the target surface is about 1m (39 inches); a spraying distance from the target surface of 0.9m to 1.2m (36 to 48 inches) provides the most even coating. This gives the charged mist space to develop into a chaotic cloud that will be attracted to the target surface. 5) Hold the spraygun at right angles to the target surface. Starting at the highest point and using zig-zag horizontal strokes about 1 meter (3 ft.) wide, apply the PCO Sealant down to the lowest point. Try to have each stroke overlap the previous stroke by about 50%. 6) Use vertical strokes if it suits the area better. Just make sure to work in a methodical pattern and let your strokes overlap. 7) When moving to the next section, allow it to overlap the previous section by a few centimeters. Do not leave a gap. 8) Unlike spray painting, you don t have to stop the application on every return stroke. Just engage the trigger lock and concentrate on the regular pattern of coating. Periodically check to make sure the red light is illuminated on the spraygun.

14 5. PCO Sealant Drying There are two phases in the PCO Sealant protective film forming process, including the primary drying and the final setting. Primary drying is a procession, by which the PCO Sealant is preliminarily coagulated by evaporation of the dispersant. After primary drying, the PCO Sealant is stabilized and can be activated by light. Drying with heat can effectively lessen the drying time. Once the PCO Sealant is final set it becomes a solid film which never dissolves. For approximately two months after the finished application the hardness process will continue until it reaches a stability of 2H to 5H (equivalent to a pencil lead). In case of forced drying or heating, it should be conducted below 600 C. When the PCO Sealant is heated to more than 800 C, the photocatalyst activity is decreased. If an area is coated by accident, wipe off the excess solution immediately. It is very difficult to remove the coating after it has dried completely. 6. Safety Caution Refer to Material Safety Data Sheet (MSDS). Recommended gear such as gauze facemask and eye protection goggles should be worn during the installation of PCO Sealant.