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NANOMATERIALS ADVANTAGES AND DISADVANTAGES OF ITS APPLICATIONS

Nanomaterials are preparing to become a major impact on construction. However, nanomaterials are ready for widespread use and can offer significant advantages for a variety of applications, ranging from the manufacture of concrete more resistant to such self-cleaning windows.

Despite the value that can be given, the widespread use of building materials comes with potential environmental and health risks when these materials are not disposed of properly.

"The advantages of using nanomaterials in construction are enormous," "When you consider that 41 percent of all energy used in the U.S. is consumed by commercial and residential buildings, the potential benefits of energy saving materials are just vast."

It follows that nanomaterials probably have a greater impact in the construction industry than in any other sector of the economy , after the biomedical and electronics applications.

cite dozens of potential applications. For example, nanomaterials can strengthen the steel and concrete, prevent soil from sticking to the windows, "kill" bacteria on the walls of hospitals, fire resistant materials, etc.
addition to the many benefits to the construction industry, also identified potential health effects and environmental effects.
In some cases, properties that make nanomaterials useful can cause potential problems if the materials are not properly managed. For example, titanium dioxide particles exposed to UV light can generate molecules called " species reactive oxygen species "that prevent the formation of bacterial films on the windows or solar panels. This same property may jeopardize the beneficial bacteria in the environment .

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Plastics - Polymers

A polymer (from Greek poly, many, meros, part, segment) is a substance whose molecules are at least approximately multiples of low molecular weight units. The unity of low molecular weight monomer. If the polymer is strictly uniform molecular weight and molecular structure, degree of polymerization is indicated by a Greek numeral, according to the number of monomer units it contains, so talk of dimers, trimers, tetramer, pentamer and beyond. The term polymer refers to a combination of an unspecified number of drives. Thus, the trióximetileno, is the trimer of formaldehyde, for example.

If the number of units is very large, it also uses the expression large polymer. A polymer does not need to consist of individual molecules all of the same molecular weight, and need not all have the same chemical composition and the same molecular structure. There are natural polymers such as certain globular proteins policarbohidratos, whose individual molecules all have the same molecular weight and the same molecular structure, but the vast majority of important natural and synthetic polymers are mixtures of polymer components counterparts. The small variability in chemical composition and molecular structure is the result of the presence of end groups, branches occasional variations in the orientation of monomeric units and the irregularity in the order in which a succession of different types of such units copolymers. These varieties are generally not affect the final product properties , however, has discovered that in some cases there were variations in copolymers and certain crystalline polymers.

Polymers isomers

isomers polymers are polymers that have essentially the same percentage composition, but differ in the placement of atoms or groups of atoms in molecules. The vinyl polymers such isomers can be distinguished in the guidelines (head to tail, head to head, tail to tail, or random mixtures to of two) of consecutive segments (monomer units):

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History of the materials and their classification

The materials are substances that make up anything or product . From the beginning of civilization, the materials along with energy have been used by man to improve their standard of living. As products are manufactured from materials, they are everywhere around us. The most commonly found are wood, concrete, brick, steel, plastic , glass, rubber, aluminum, copper and role. There are many more types of materials and one only has to look around to see it account. Because the progress of research and development programs, are continually creating new materials.
The production of new materials and processing of these to turn them into finished products, are an important part of our economy today . Engineers design most manufactured goods and processes for its manufacture. Since the production need materials, engineers must know the internal structure and property of materials, so as to be able to select the most appropriate for each application and also able to develop better methods processing.

specialized engineers in research work to create new materials or to modify existing properties. Design engineers use the materials existing, the modified or new to design or create new products and systems . Sometimes the problem arises in the opposite: design engineers have difficulties in design and require a new material is created by research scientists and engineers.
The search for new materials continually progresses. For example, mechanical engineers are looking for materials for high temperatures, so the reaction engines can operate more efficiently. Electrical engineers try to find new materials to ensure that electronic devices can operate at higher speeds and temperatures.

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