纳米演讲稿_经警演讲稿
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开头：Today, we will talk about nano-materials and nano technology in the field of textiles and clothing.Our introduction includes four parts , Introduction and History of nanotechnology, Properties of nanomaterials, Nano-materials in the field of textiles and clothing,Prospects for Nanotechnology.Ok , let’s start our topic.纳米简介：We all know that “Nano” is a transliteration(音译)of the English Nanometer , Nanometer is a very small unit of length.One nanometer is equal to One-thousand-millionth of a meter.You may not know the nanometer clearly.let’s look at a picture for further understanding.You can see the human hair diameter is here.(150micrometers).One nanometer is equal to one ten thousandth the thickne of hair.纳米材料和纳米科技的简介：
Nanomaterials means a material composed of nanoparticles between 1 and 100 nanometers.At the nanoscale , substances and materials research and proceing technology called
nanotechnology.Nanotechnology
including
three aspects,nanomaterial, nanodevice and nano biomedical.According to the current study field , it can be roughly divided into, nanomaterials , nanoelectronics, nanobiology, nano manufacturing, nano-optics and so on.历史：Let’s know more about the history of the development of nanotechnology.In 1965, the Nobel physics prize winner feynman(R.P.Feynman)put forward the concept of “nanomaterials” for the first time.When Scanning tunneling microscope invented in 1982, the study of the molecular world in nanometer length born.Its ultimate goal is to directly construct an atomic or molecular products with special functions.Therefore, Nanotechnology is actually a single atoms and molecules to create materials technology.Discovery of fullerenes in 1985 [1996 Nobel Prize in Chemistry].Term “nanotechnology”, originally coined in 1974, appropriated by Drexler in his 1986 book Engines of Creation: The Coming Era of Nanotechnology, which proposed the idea of a nanoscale “aembler” which would be able to build a copy of itself.Then, Nano science and technology started in 1990 formally.纳米材料：Let’s know more about Nanomaterials.In the early development of nano-materials, Nanomaterials refers to nanoparticles and thin films and solid by their composition.Now, Nanomaterials are broadly refers to materials in a three-dimensional space of at least one dimension in the nanoscale range or a pile of them as a basic unit.Popular that nanomaterials refers to any type of material composed of units of nanometers.Such as metals, ceramics, polymers, semiconductors, gla, and composites.The basic unit of nanomaterials can be divided into three categories in dimensions.A.Zero-dimensional ,there are three-dimensional space are at the nanoscale.Such as nano-sized particles, Radical family, etc.B.One-dimensional , there are two-dimensional space in the nanoscale.Such as nanowires, nanorods, nanotubes, etc.C.two-dimensional , One of three dimensional space dimension in the nanometer scale.Such as ultra-thin, multi-films and superlattices, etc.Most nanomaterials are prepared artificially.But nature has long existed nanoparticles and nano-solids.For example, Pollen is nanoscale particle.Virus is also nanoscale particles.Gecko crawls not only rely on sucker, but also tens of thousands of tiny bristles on toes.There are tens of microns coarse bristles roots.Top divided into many finer and more curved hairs.Only a few hundred nanometers in diameter each villus.Its peripheral extend into a flat shape.This adhesion can “peel” easily broken, like the tear tape the same, so the gecko can freely pa through the ceiling.Butterfly wings is composed of two 3 to 4 microns thick layers of scales.Alternately like tiny tiles as the top layer of scales.Each flake structure is very complex.The next layer is relatively smooth.Such orderly arrangement of butterfly wings forming the so-called photonic crystal, which is the nanostructure.With this structure, the butterfly wings can capture light.Only let certain wave lengths of the fiber through.This will determine the different colors.纳米材料特性： Let’s know some Properties of nanomaterials.The Basic properties of nanomaterials are Volume effect, Surface and interface effects, Quantum size effect, Macroscopic quantum tunneling effect, The dielectric confinement effect.Also, nanomaterials have some special properties, like, Optical Properties, Catalytic properties, Photocatalytic Properties, Chemical Reaction Properties, Mechanical Properties, Thermal Properties, Conductive Properties.应用：There are three ways to apply nanotechnology mainly in the textile sector(1)ultrafine fibers(2)the use of nanomaterials modification of traditional materials(3)To nanometer fiber or fabric finishing, so that it is functional.纺织服装应用：There are a lot of Nano-materials in the field of textiles and clothing.Infrared function, Antibacterial &deodorization, Anti-electromagnetic radiation, Fire retardant , Water resistant & oil resistant, Antistatic, UV protection.1.Far infrared thermal underwear.Health care textile products like, health underwear ,made of far-infrared light therapy ,nano-antibacterial and functional fabric , can release negative oxygen ions, also has the ability to efficiently emit far infrared and antibacterial deodorizing.It can improve the body's ability to heal and recovery.2.Solar ultraviolet radiation damage to the human body, mainly in the band 300-400nm, nano silica, zinc oxide, and iron oxide in this band has a characteristic of absorbing ultraviolet rays, adding a small amount of nanoparticles to chemical fibers, will produce UV absorption phenomena, which can effectively protect the body from UV damage.3.Adding a small amount of nanoparticles chemical products, such as nano silica, zinc oxide, iron oxide and chromium oxide powder with semiconductor properties, such as the incorporation into the resin, or to add it to the finishing agent for after finishing fiber or fabric, will produce good electrostatic shielding performance and greatly reduce electrostatic effects.4.Some metal particles(such as silver nanoparticles, nano copper particles)and nano nano silica, zinc oxide has certain Bactericidal properties, with the fiber composite spinning, make the function of antibacterial fiber, than the average antibacterial fabric has better antibacterial effect and washes more often.Bosideng underwear add nanoscale ultra-fine powder, it can antimicrobial sterilization, eliminate odors effectively.5.Doing Special proce In the surface of the material.Establishing a nano interface structure in its macro-interface, so that the material is not only waterproof, anti-oil and anti-ink and so on , and when washing clothes made of this material can only rinse without using conventional detergents.Like , Lotus effect-a hydrophobic self-cleaning clothes According to the self-cleaning ability of lotus leaf, using hydrophobic and oleophobic properties of nano interface materials, through artificial modification of each small textile fibers, the fabric formed a fine fluff structure on the surface.It can absorb air molecules and form a layer of air cushion on the surface to prevent contamination of the fabric by the oil and water.6.Silver ions Maternity: aggregating nano elemental silver and fiber to form a strong resistance to oxidation layer structure on the fabric surface.Integration the silver and green fiber organically , it has the factions, like , isolate electromagnetic radiation, anti-bacterial deodorant, anti-static, regulate body trepeated emperature, moisture wicking, breathable, soft light, resistant to washing, washed not tie itself can be personal wear, long life.总结：Development of Nanoclothing played an important role in enhancing the core competitivene of industrial and improving economic development.Nanoclothing getting close to people's daily lives and tools, at the same time, the garment industry pioneered a new path.In addition, with the development of science and technology and per capita standard of living, people are seeking upscale, comfortable and functional clothing.Therefore, the use of the special properties of nanomaterials to develop high value-added functional fabrics and garments will create enormous economic and social benefits in future textile and apparel industry.
