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According to the China Industry Research Network published 2016--2022 China's Development Research silicon dioxide industry analysis and forecast trends report shows that in recent years with the rapid development of Chinese silica industry, the global production capacity of silica showed rapid growth, By the end of 2014 the global production capacity of silicon dioxide at about 4.2 million tons, of which nearly 2.5 million tons capacity in China, accounting for 59.5% of the world's total. On silica consumption, China is now the world's largest consumer market in silica, the annual consumption of more than one million tons, far more than the United States, Japan and other developed countries. 

World Resources of silicon (crystal, quartz, natural silica sand, etc.) distribution is extremely uneven. According to historical records, the most abundant silicon resources is in Brazil, followed by Madagascar and Guatemala. China, the United States, Canada, Russia, France, Italy, India, Australia, Turkey, Burma, more than 30 countries and regions also have silicon resources. According to the National Geological Survey published data: in 2014 the global silicon production was 7.68 million tons, an increase of 2.50%.

Some study was to synthesize the inherently conductive polymer polyaniline using an optimized process to prepare polyaniline/silicon dioxide (PANI/SiO2) composites by in situ polymerization and ex situ solution mixing. PANI and PANI/SiO2 composite films were prepared by drop-by-drop and spin-coating methods. The morphology of particles and films were examined by a scanning electron microscope (SEM). SEM measurements indicated that the SiO2 were well-dispersed and isolated in composite films. 

The electrorheological (ER), characteristics of the polyaniline/silicon dioxide (PANI/SiO2) composites were investigated. A volume fraction series (φ = 5–25 %) of the PANI/SiO2/silicone oil dispersions were prepared and sedimentation stabilities were determined. An ER activity was observed from the samples, when subjected to external electric field strength thus, they were classified as smart materials. Some parameters affecting the ER properties of the dispersions such as volume fraction, shear rate, electric field strength, frequency, and temperature were investigated.


 

 

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