Application of oriented collagenic reticular foamed plastic as heat-insulating, thermostatic and sound-proofing material

FIELD: construction.

SUBSTANCE: invention deals with technological process of manufacture of foam plastics in general and oriented texture collagenic reticular foamed plastics in particular. The foamed plastics specified are to be used as heat-insulating, thermostatic and sound-proofing materials.

EFFECT: ensuring a useful effect more pronounced than in case of alternative materials usage.

2 dwg

 

The proposed technical solutions are oriented collagen reticular the cellular plastic.

Collagen reticular cellular plastics represent a special class of porous polymeric materials, getstructure elements which are devoid of faces, and the polymer phase is mainly concentrated in the edges of their geometrically complex structures, see, for example, AlN, Fastow. "Chemistry and technology of gazonapolnennyh of vysokopreosv "Publishing house "Science", 1980, str.

Oriented collagen reticular cellular plastic directional patterns previously was not known, and both he and the method thereof described in the application PCT/RU2007/000052, filed simultaneously with this.

Practical application oriented collagen reticular cellular plastics allows to solve a threefold purpose, namely:

- to ensure good sound insulation,

- to provide high thermal insulation,

- to maintain humidity and temperature.

Materials set of these properties is not known.

There are many good heat and sound insulation (foam, Isover, Rockwool), which may be regarded as analogues and which are mentioned in the text of the application.

However, none of them is able to automatically maintain the humidity and temperature.

This is sposobnosti and is a hallmark of the use of collagen poroplast. Thermostatic properties of collagen poroplast determined by its ability to reversibly absorb and decarbonate moisture from the environment.

As a result of this he is able to maintain constant temperature and humidity in the surrounding space.

It is not only in the composition of poroplast, but also in its structure. Openly porous, permeable reticular structure provides a high rate of mass transfer reticular poroplast with the environment. And this is a necessary condition for rapid response to changes in humidity and temperature. This property collagen reticular poroplast unique.

Oriented collagen reticular cellular plastics have the best performance in sound absorption compared to most of the known materials used as acoustic insulation materials currently. Such materials can be obtained by the method of ristrutturare aqueous dispersions of collagen. Desired technical result of the application of the proposed solutions is to achieve the best performance properties - sound insulation, thermal insulation, expansion and extension of the Arsenal used for these purposes materials in construction, transport, equipment for various purposes as the hospital is Oh, and mobile, as well as any other areas where such materials can be used.

Use the reticular cellular plastics directed (oriented) structure as insulating materials allows to obtain insulating properties at or better used at the moment insulating materials. Combined with good insulation properties it provides optimum performance properties when used in construction, machinery, transport of various types, in refrigeration, etc.

Coefficient of thermal conductivity (W/m·)

in the dry state is:

for reticular cellular plastics
directional patterns0,04
for foam0,05
for Isover0,033

Use the reticular cellular plastics directional patterns as thermostatic material ensures the best thermal management functions in comparison with known materials.

The use of modern heat and sound insulating materials creates a number of problems, primarily related to fluctuations of temperature and humidity inside the insulated object (buildings and is of okrujenii, cars and trains, and other vehicles).

In most cases this problem is solved by creating a complex air conditioning systems that require constant maintenance and consume a significant amount of energy. The estimated cost of energy consumed for these purposes, is about 100 billion dollars a year.

However, the problem of maintaining a comfortable temperature and humidity can be solved fundamentally different way, namely through the use of hygroscopic heat and sound insulating materials.

It is well known that in wood, clay or covered with lime plaster house is exclusively comfortable atmosphere, due to the ability of these materials to reversibly absorb and decarbonate moisture, i.e. to perform the conditioning or thermoregulatory function with virtually no expenditure of energy.

This effect has been widely used for centuries. As an example, the Winter Palace, which Rastrelli in the 18th century, using such materials for interior finishing of the building, has achieved extraordinary effect of conditioning without the use of any sophisticated technical devices. This technique was later called "the Hermitage" method of creating Mick is climate.

Given the continuously increasing cost of energy, as well as explicit global warming, "the Hermitage" method of maintaining microclimate clearly belongs to the future.

However, the materials traditionally used for this type of conditioning, do not possess the required heat and sound insulating properties, as well as have a relatively large specific gravity.

This problem may be effectively solved by application of porous heat-sound-proof materials designed patterns on the basis of collagen.

These materials have low thermal conductivity, excellent sound absorption and sound insulation properties, and high hygroscopicity, reaching under certain conditions, 100%.

They are able to absorb a significant amount of moisture in the air and release it when the temperature rises. Evaporation causes the natural lowering of the surface temperature of the material.

So during the evaporation of only 50 g of water contained under normal conditions in 5 square metres of collagen material, the temperature is 10 cubic meters of air is reduced from 30 to 20 degrees.

The uniqueness of the material properties is that being a good heat insulators he has the ability to reversibly bind moisture, while maintaining its strength and other physical and m the mechanical characteristics. For the vast majority of modern building materials hygroscopicity ranges from 3 to 10%. The absorption causes the temperature-controlled (air-conditioning) properties of the material. For example, having absorbed a certain amount of moisture, it will give her when the temperature of the environment, supporting, so it's a constant humidity. But in addition, the evaporation will cause cooling of the surface of the material and thereby reduce the temperature of the ambient space. Since the hygroscopicity of the material than the known almost an order of magnitude, the limits of this kind of regulation become very significant. That is, the material will maintain a constant microclimate much longer and will be more effective if significant fluctuations in temperature and humidity environment.

The use of oriented collagen reticular cellular plastics as a thermal management material allows you to have a far more pronounced effect of temperature compared with the effect of control obtained with the application of currently used for the construction of fixed structures and vehicles materials.

Application of collagen reticular cellular plastics directional patterns (oriented the data collagen reticular cellular plastics) as the insulating material to reduce the thickness and therefore the weight of the insulating layer in comparison with many well-known insulating materials when receiving the same noise reduction. This is especially true when applied to transport, mobile equipment and other places where dimensions and weight are important. More efficient absorption reticular cellular plastics directional patterns allows to achieve the best sound effect in comparison with the known sound insulation at the same thickness and weight of the insulating layer. In turn, the application of reticular cellular plastics directional patterns as a soundproofing material expands the Arsenal used insulating materials. Sound-absorbing characteristics than such a widely used sound-absorbing material such as mineral wool. For example, when the thickness of only 20 mm of it in terms of sound absorption is the same as the layer of mineral wool with a thickness of 40 mm

The sound absorption coefficient reticular cellular plastics directional patterns at a thickness of 20 mm monotonically increases from 0.4 to 0.8 when changing the frequency of the incident sound from 500 to 4000 Hz.

The sound absorption coefficients of the samples was determined by the method of acoustic interferometer at normal incidence sound waves on the sample surface. The results presented in the graphs figure 1 shows a high sound-absorbing ka is the EU ETS material. Quantitative indices of the materials at a thickness of 20 mm are almost the same with the same indicators, specific to the products (slabs) of mineral wool, but at a thickness of 40 mm Reverberation sound absorption coefficients defined in rhythmic cells with samples with a total area of 10-12 m2in the field of low and medium frequencies due to the phenomena of diffraction is expected to increase to 1.6-1.7 times compared with normal ratios.

Values of the dynamic moduli of elasticity determined in accordance with GOST methodology 16297-80 "Materials, sound insulation and sound absorbing. Test methods", presented in the table. The dynamic characteristics of the sample material is similar dynamic characteristics of soft or semi-rigid mineral wool with synthetic binder and meet the requirements of SNiP 23/03/2003 "Protection against noise".

Calculated values reduce the above impact of noise levels floating floors precast slabs weighing about 100 kg/m2laid on an insulating layer of foamed skin thickness of 10 and 20 mm, are shown in the graphs of figure 2. The estimated indexes isolating impact noise material thickness of 10 and 20 mm were respectively 21 and 23 dB. The samples tested strips of foamed skin on his acoustic performance with testout the requirements of SNiP 23-3-2003 and can be recommended for use as sound-proof gaskets in building constructions when the device is floating floors and vibration control engineering equipment of buildings.

The use of oriented collagen reticular poroplast as insulating, thermal and sound insulating material.



 

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