Silic acid dry coagulation ingredient.baby gags on pacifier company

　　Silic acid dry coagulation ingredient Si (OC2H5) 4 (Teos) and H2N (CH2) 3SI (OC2H5) 3 (APS) as the main raw materials, under different conditions (catalysts, heat treatment, polymer additives) through the solution -gel method A series of different SIO2 dry gels were prepared, and the dry gel obtained by the luminous spectrum was made. Under the inspiration of the long wave 365nm ultraviolet light, the dry gel sample shows a strong blue light launch, but its luminous wavelength and luminous intensity are significantly different from the composition and processing conditions. The results of APS and organic acid (acetic acid) and inorganic acid (hydrochloric acid, nitric acid, sulfuric acid) SiO2 dry gel results are iHAC (λmax = 432nm)> IHNO3 (λmax = 441nm) ≈Ih2so4 (λmax = 426nm) "λmax = 442nm), and in the dry gel samples obtained by APS and HCL, there are obviously two types of emitting centers (its launching peak wavelengths are 442nm and 487nm, respectively, and the corresponding stimulation wavelengths are 365nm and 273nm, respectively). A certain amount of TEOS and APS mixes and HAC effects are not only conducive to the rapid formation of dry gel samples, but also conducive to improving its luminous intensity: when R (APS/Teos+Teos Moore) = 0.5-0.7, the sample glows Strong, add polymer additive polyetterol (PEG5000, PE10000) during the reaction process of 0.5 Moore APS+0.5 Moore Teos and 3 Moore HAC. And as the amount of PEG increased, the optimal doping volume of PEG5000 and PEG10000 were 0.8g and 0.6g, respectively. Within the range of 20-200 ° C, the luminous strength of dry gel samples increases with the increase in thermal treatment temperature. At the same time, the light processing of the samples in the vacuum is greater than the luminous strength of the sample in the air. This shows that the light of dry gel sample is related to oxygen defects and carbon impurities.

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