Plastic optical fiber modified by nanometer materials and method for preparing plastic optical fiber

Abstract

The invention discloses a plastic optical fiber modified by nanometer materials and a method for preparing the plastic optical fiber. The method includes steps of weighing, by weight, 1-10 parts of yttrium trifluoroacetic acid, dissolving the yttrium trifluoroacetic acid in mixed solution of ethyl alcohol and water, adding 90-99 parts of tetraethyl orthosilicate into the mixed solution and adjusting the PH (potential of hydrogen) of the mixed solution until the PH of the mixed solution reaches 1.5-2.0; adding the mixed solution into a high-pressure kettle until 1/2-2/3 of the volume of the high-pressure kettle is filled with the mixed solution, sealing the high-pressure kettle and carrying out reaction under the condition of temperature of 60-80 DEG C for 0.5-10 hours; drying products obtained in the high-pressure kettle, cleaning the products by the aid of ethyl alcohol and drying and smashing the products to obtain nanometer auxiliaries; weighting 0.1-10 parts of the nanometer auxiliaries, mixing the nanometer auxiliaries and 90-99.9 parts of methacrylic ester monomers with one another and carrying out heating polymerization to obtain plastic optical fiber pre-polymerization bars; heating the plastic optical fiber pre-polymerization bars, drawing the optical fiber pre-polymerization bars to obtain a plastic optical fiber with a required diameter so as to obtain the plastic optical fiber modified by the nanometer materials. The plastic optical fiber and the method have the advantages that the plastic optical fiber is good in heat resistance and low in water absorption, and the application range can be expanded.

Description

【Technical field】 [0001] The invention relates to the field of plastic optical fibers, in particular to a PMMA plastic optical fiber modified by nanomaterials and a preparation method thereof. 【Background technique】 [0002] Plastic Optical Fiber (POF) uses highly transparent amorphous isotropic polymers such as polystyrene (PS), polymethyl methacrylate (PMMA), polycarbonate (PC) as the core material , Fluorine resin, etc. as a type of optical fiber (optical fiber) as cladding material. Plastic optical fiber, like quartz optical fiber, has the same advantages in the field of optoelectronics, such as light weight, anti-electromagnetic interference, multiplexing, etc., and has a low melting point, good flexibility, not easy to break, easy to heat-melt stretch, and low preparation cost. Low, easy to operate, very sensitive to stress, and has a low loss window in the visible light band. However, although plastic optical fiber is much cheaper than quartz optical fiber, it also ...

AI Technical Summary

Problems solved by technology

However, although plastic optical fiber is much cheaper than quartz optical fiber, it also has some disadvantages: (1) high loss, internal scattering caused by macromolecules makes POF loss high; (2) poor heat resistance, generally only at -40 ° C Use in the temperature range of -80°C; (3) The bandwidth is relatively small, which affects its wide application in communication systems; (4) Due to the OH absorption in the near-infrared region, it must work in the visible light region

PMMA is the most widely used variety in plastic optical fibers. Its light transmission is the best among plastics, its refractive index is equivalent to crown glass, and it has good weather resistance and excellent fiber drawing performance, but its glass transition temperature is low (Tg=105℃ ), poor heat resistance, high water absorption, when used in places with high ambient temperature or high humidity, there are serious problems such as large signal attenuation and easy aging, which limits its scope of application