Horizon 2020

CHEM SPEC SRL

NANO CATHEDRAL

OPEN CONFERENCE

OSLO

7 JUNE 2017

Technical Meeting – Rome, October 4-5/2016 2

Innovative stone protection and stone hardner based on inorganic nano

particles and silicon compound

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CHEM SPEC is an Italian company operating in formulation of protectives and consolidants of mineral building materials.

For the NANO CATHEDRAL project Chem Spec developed with the partners of the project a range of water repellent and consolidant products , based on organic silicon derivates and inorganic nano particles .

The innovation of our formulations is to combine different products to obtain new materials with high performances.

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CHEM SPEC selected 2 types of nano materials supplied by our partners of the project :

COLOROBBIA an Italian company

and

TECNAN a Spanish company

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Types of nano particle • Nano titania nanometric titanium dioxide

with particles of dimension lower than 100 nanometer (10-9 meter) generally between 5 and 40 nm . Nano titania is generally dissolved in water and organic solvents.

• Nano Silver metallic silver with lower dimension particles than 100 nm , generally dissolved in water or solvent.

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NANO TITANIA

The product applied on the building materials as: natural stone, marble , terracotta materials, thanks to the little molecular dimension don’t change the surface aspect giving the following

characteristics and is able to transform the solar light in photocatalytic effect.

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Photocatalytic effect

NANO TITANIA absorbing solar light transform it in a high oxide power able to oxidize the organic substances present in the air and in contact with the surface.

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Air purification: photocatalytic skills are able to destroy the organic microparticle ( PM 2, PM 5, PM 10)

Hidrophyilic effect confers to treated stones a self cleaning effect

Reduction of the air pollutants like NOx and SOx, improving the air quality

Oxidation of carbon oxide CO in CO2

Destruction of benzene, aldehyde, ketones

Elimination of spore, bacteria and fungus giving an hidrophilic characteristic to the treated surfaces confering a self cleaning effect.

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some considerations…

Nano titania transforms the treated surfaces in anti pollution systems . As some studies carried out by environmentalist societies they pointed out ,

considering the same surface size, the anti pollution effect of nano titania dioxide applied on the surface give the same quantity of depollution as a

forest with medium size trees

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CHEM SPEC suggests the combination of nanotitania particles and alkyl alcoxy silanes monomer both able to

confer:

high water repellent effect, lasting in time,

joined to

self cleaning and antipollution characteristics of nano titania.

These 2 characteristics give a good solution to protection of monuments with a particular attention to

the environment.

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NANO SILVER

Applied in combination with monomeric silanes for water repellent and antifouling protection of the building.

Unlike the nano titania, the nano silver reacts even without solar light.

Nano silver is a good choice for:

Application with a low toxicity for man and environment

Effective even in small quantity 10-100 ppm

No chromatic change on the treated surface

Good efficacy against fungi, algae and bacteria

Long lasting effect

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SILANES

Little dimension about 1 nanometer

SILANE CHEMICAL ETHYL SILICATE CHEMICAL

R’ OR

| |

RO – Si- OR RO – Si- OR

| |

OR OR

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The product is able to assure:

• Excellent deep penetration in stone materials giving water repellent characteristics ( by alkyl alkoxy silane) and consolidant ( by ethyl silicate), leaving a good traspirability to water vapour and no chromatic change aspect on the surface.

• The treatment with silane is stable to UV ray and it doesn’t yellow, and it very resistant to acid and alkaline solutions.

• Low environment and for operators impact.

• Product easy to apply

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THE PRODUCTS

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• PROTECTIVES

• PF A • PFM S 5 • PAOS 6 • PFEW 10

• CONSOLIDANT

• HFES 70 • HFES 90

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PROTECTIVE PF A

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Short products presentation: characteristics and properties

• Water repellent photocatalic protective in water

• Phisic state liquid • Phisic-chemistry colour white milk traslucent

Density ~ 1 Kg/l pH 4,5 + 0,2

• Chemical nature organo modified silane and nanotitania 25 % active content • Solvent water • Additive tensioactive, biocide, • Curing time 24 hours at 22 °C

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PROTECTIVE PF M S 5

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Short products presentation: characteristics and properties

• Monomeric photocatalitic protective in water

• Phisic state liquid solution

• Phisic-chemistry colour slightly yellow • Density ~ 0,84 Kg/l

• Chemical nature alkyllkoxy silane and nanotitania 40 % active content • Solvent isopropyl alchool • Additive catalist • Curing time 24 hours at 22°C

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PROTECTIVE PA OS 6

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Short products presentation: characteristics and properties

• Antifouling protective in alchool

• Phisic state liquid solution • Phisic-chemistry colour transparent , slightly pink

Density ~ 0,8 Kg/l

• Chemical nature oligomeric alkyl alkoxy silane and nano silver 10 % active content Solvent isopropyl alchool • Additive catalist • Curing time 24 hours at 22°C

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PROTECTIVE PFEW 10

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Short products presentation: characteristics and properties

• Water repellent photocatalitic protective in water

• Phisic state liquid solution • Phisic-chemistry colour white

Density ~ 1 gr/cm3

• Chemical nature nano titania and oligomeric alkyl alkoxy siloxane Solvent water • Additive bacterial preservative • Curing time 24 hours at 22°C

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CONSOLIDANT HFES70

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Short products presentation: characteristics and properties

• Photocatalitic consolidant in alchool

• Phisic state liquid solution • Phisic-chemistry color white density ~ 0,970 Kg/l at 15° C • Chemical nature nano titania dioxide and ethyl silicate 70% active content • Solvent isopropanol • Curing time 25 days at 25°C

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CONSOLIDANT HFES 90

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Short products presentation: characteristics and properties

• Photocatalitic water repellent consolidant in alchool

• Phisic state liquid solution • Phisic chemistry color white density ~ 1 Kg/l 25°C ASTM D 1298

pH neutral • Chemical nature Nano titania dioxide and ethyl silicate modified 75% active content • Solvent isopropanol • Additive catalist • Curing time 21 days at 22°C

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CONCLUSION

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The studies and applications coming from Nano Cathedral project conferm that nanotecnology combined with traditional protective or consolidant products can achieve new range of products with 2 important goals o results: Protection for stone materials Depollution of the air , using the surface of the cathedrals as forest with

medium size trees It is he first time nanotechnology protect the monuments and improve the life quality of the people.

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thanks for Your attention!

Mr. Galimberti – Chem spec ‘s commercial director

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