Ngaahi me'a tanaki sima ma'ama'a | Ngaahi fakafofonga Foaming ma'olunga-ngaue ki he sima 'o e selo
'Iloa 'i hono ngaahi 'ulungaanga lelei 'aupito 'o e insulation thermal ., ko e silika aerogel ko ha fakaava ., ava, fokotuʻutuʻu lelei, ma'ama'a, silica amorphob fakatupu 'o e vai. Ko hono fa'unga 'oku ne fakangatangata 'a e hala tau'ataina 'o e 'ea ., 'o fakasi'isi'i ai 'ene conductivity 'o e mafana .. 'Oku toe ma'olunga 'a e vai repellent mo e kohu permeable .. Ko ia 'e lava ke faka'aonga'i ia 'i he ngaahi polokalama langa ke 'oatu 'a e pule'i mo e mapule'i 'o e moisture ..
'Oku ngaohi 'a e silika aerogels 'e he founga 'o e sol-gel 'o faka'aonga'i 'a e ngaahi me'a 'oku ma'ama'a 'a e alkoxide hange ko e TEOS pe TMOS pe 'esiti silicic vai-soluble . (Na2SiO3.). 'E lava ke fakatupu 'e he gelation 'o e ngaahi precursors ko 'eni 'e he fakalahi 'o e mafana ., Liliu pH, adsorption pe 'oku fakatupu 'e he 'uhila. 'Oku faka'ilonga'i 'a e silica aerogels 'aki honau fu'u ma'olunga 'aupito 'a e funga 'o e 'elia pau 'o kamata mei he a'u ki he 100. 1000 m2 g-1.). Ko honau ngaahi funga 'oku amorphous ., 'ikai sio'ata, and have a high transparency and a low refractive index. The doping of aerogels with transition metal oxides like vanadia results in efficient catalysts.[1]
Pea mo e, they exhibit interesting properties such as high flexibility and the ability to recover shape after unloading. Koe'uhi ko e 'uhinga ko 'eni ., they are attractive for many applications. In order to test their mechanical properties, a series of samples were fabricated by mixing different concentrations (5 wt% and 10 wt%) of silica aerogel with recycled rubber and PVB. These composites were then subjected to stress-strain tests on a Carver laboratory hydraulic press. The recovered values of Young’s modulus of the samples ranged from 69-98 Pa, demonstrating their good elasticity. Tanaki atu, all the samples showed a high ability to absorb organic liquids.