The photochromic spirooxazine compound(SO2) was prepared and characterized.The dye doped PMS film on glass was prepared via sol-gel method from methyl trichlorosilane(MTES) by purpose of reducing the effect of hydrogen bonds.The visible spectrum was measured to observe the dimming effect of the dye doped PMS film.

The title silver nanocrystals encapsulated in mesoporous silica nanoparticles(Ag-MSN) with increased stability and enhanced antibacterial potency has been prepared.The morphology of the nanoparticles was characterized by scanning electron microscopy and transmission electron microscopy.X-ray diffraction analysis indicated that the silver nanocrystals were truly embedded in the mesoporous silica nanoparticles.The antibacterial effect of silver nanoparticles was proved by plate count method and bacterial growth curve and spectrophotometer.The coatings with antibacterial properties have been gained by silicone resin using mesoporous silica containing silver as the main body of pigment.The research results will help to reveal the antifouling mechanism of nano-silver material,and to promote the development and application of new green marine antifouling coatings.

There are two major ways to develop low toxic,environmentally friendly non-toxic antifouling marine coatings: the first one is look for antifouling polymer;the second one is find non-toxic antifouling agent,preventing biofouling under the premise of no environment damage.The research status of environmental friendly marine antifouling coatings was summarred combined with application of nano-silver in the antifouling coatings,the trend of anti-fouling marine paint was also discussed.

A novel route to prepare low-dielectric constant mesoporous SiO(2) films was reported. Silicate sols were prepared with the precursor of TEOS and template of CTAB catalyzed by hydrochloric acid. The films were prepared by dip-coating process. FTIR, XRD and AFM were employed to characterize the films. The dielectric constants were measured by impedance analysis apparatus. These films with dielectric constants smaller than 2.2 could be acquired by adjusting the concentration of CTAB and aging time.

A novel route to prepare low-dielectric constant mesoporous SiO2 films is reported in this paper. Silicate sols are prepared with the precursor TEOS and template CTAB catalyzed by hydrochloric acid. The films are prepared by dip-coating process. FTIIR, XRD and AFM are used to characterize the films. The dielectric constants are measured by impedance analysis apparatus. The films with dielectric constants smaller than 2.2 can be acquired by adjusting the concentration of CTAB and aging time.

Silica aerogels doped with ceramic fibers were prepared successfully via sol-gel process with polyethoxydisiloxanes (E-40) as the silicon source. Surface modification was used to realize ambient pressure drying. The morphology, pore structure, mechanical properties and thermal conductivity of the silica aerogels doped with ceramic fibers were investigated. The results show that the ceramic fibers were evenly distributed inside the silica aerogels to increase the mechanical property. The mechanical strength of the silica aerogels increases from 1.6 times 10 4 pa to 9.6 times 10 4 pa with the doping of 10% ceramic fibers, while the thermal conductivity is 0.029 w/mmiddotK at room temperature in air. The hydrophobic properties of the doped aerogels are improved a lot by surface modification.

Al~(3+)-doped ZnO(ZAO) nanometer powder is prepared by the sol-gel method.The structure,crystallization and infrared absorbency of ZAO powder are studied with XRD and infrared spectra.Results of XRD show that the crystal structure of ZnO phase is not influenced basically when Al~(3+) is doped in,and the shift of the diffraction angle is supposed to be resulted from the replacement of Al~(3+) for Zn~(2+) resulting in distortion of crystal lattice,and the particle size of ZAO becomes smaller with the increase of Al~(3+) content.The infrared spectra indicates that the infrared absorbency of ZAO nanometer powder changes with the added Al~(3+) contents.A synthetic material having low infrared emissivity can be obtained by controlling carrier concentration of ZAO in theory.

The composite film materials of single-walled carbon nanotubes(SWCNTs)and V2O5 were grown by sol-gel technique,followed by dip coating and solvent exchanging.The SWCNTs,purified and trimmed in nitric acid solution,were mixed into the V2O5 aerogel,a mixture of V2O5 powder,benzyl alcohol(BA),and isopropyl alcohol(IP).The microstructures were characterized with ultraviolet visible and infrared spectroscopy(UV-vis-NIR),Fourier transform infrared spectroscopy(FTIR),atomic force microscopy(AFM),transmission electron microscopy(TEM)and scanning electron microscopy(SEM).The results show that high quality composite films of SWCNTs and V2O5 are porous.The Influence of sintering on its optical properties was also discussed.

Porous Ni-doped carbon aerogels are obtained via sol-gel process doping the resorcinol-formaldehyde reaction mixture with nickel acetate.XRD(X-Ray Diffraction) and TEM(Transmission electron microscopy) tests are used to investigate the structure of the carbon aerogels.BET(Brunauer-emmett-teller) and PSD(Pore size distribution) tests are also used to characterize the pore structure of carbon aerogels.As a result,the surface area of Ni-doped carbon aerogel is 593.3m~2/g,while the surface area of pure carbon aerogel is 487.3m~2/g.Furthermore,the electric resistance of the carbon aerogels doped with nickel acetate is increased considerably compared with that of pure carbon aerogels.

Silica aerogel-fiber composites were prepared via a heat pressing process. Nonwoven fibers were distributed inside the silica aerogels as a composite to act as a supporting skeleton which increased the mechanical strength. The morphology, pore structure, benzene adsorption capacities of the silica aerogels and the composites were characterized. The results show that the silica aerogel-fiber composites have more excellent benzene adsorption capacities compared with the traditional absorbent materials. The saturated benzene-adsorption percentage of the composites has a direct relation with the silica aerogels weight per unit area and the saturated benzene-adsorption percentage of silica aerogels. The experimental results are in good agreement with those calculated by a special formula. The composite process has no influence on the porous structure of the silica aerogels.

Development of infrared stealthy materials overseas is summarized in this paper ,and more emphases are given on research of filler and principle of the infrared stealthy materials,as well as new stealthy paints.Some factors that effect the paints are introduced.In addition, the development of infrared stealthy materials is presented.

Hydrophobic organic-inorganic silica hybrid films were prepared by means of a two-step acid-catalyzed method and sol-gel process using surfactant as template. Methyltriethoxysilane(MTES) and tetraethoxysilane(TEOS) were co-hydrolyzed in different molar ration and were used as precursors. Addition MTES in TEOS precursors produces a decrease of Si-OH and Si-O- surface content. The infrared spectra of the films thus obtained indicated that they become hydrophobic with the introduction of the methyl groups. Contact angle instrument was also used to supplement the result. Contact angle values for hydrophobic hybrid films are greater than 120° . The refractive indices and thickness of hydrophobic hybrid films are about 1.22-1.24 and about 270-300nm The Optical transmittance spectra and mechanical intensity measurement results showed that the films have good optical and mechanical properties.