溶膠ndsoluppt課件(已修改)
2025-01-27 01:38 本頁面
【正文】 溶膠凝膠化學(xué)與工程引論 1. . Pierre, Introduction to Solgel Processing (Chemistry and Engineering) 2. 主講：夏長榮，電話 3607475，材料樓北 217室， Email: 3. 輔導(dǎo)：王運(yùn)龍， 4. 考試（ 60％），不參加考試不計(jì)成績； 5. 分組專題報(bào)告（ 40％）； 6. 上課 12周，簽到 8次以上，簽到 8次以下不計(jì)成績。 Simplified chart of solgel processes The chemistry of precursors solutions 1. All types of precursors can be used, provided they are miscible. 2. Metallic salt MmXn, AlCl3, (NH4)2Ce(NO3)6. 3. Alkoxides, Al(OC2H5)3, Si(OCH3)4 4. Organometallic pounds 1. Solvents A. Water B. Non aqueous solvents 1. 水是最好的極性溶劑之一，主要原因是什么？ 2. 舉 3個(gè)非水溶劑的例子？ 3. 極性溶劑和非極性溶劑的主要區(qū)別是什么？ 4. 酸性、堿性、二性溶劑有何區(qū)別？ 5. 舉例說明 Protic, Aprotic, amphoteric（質(zhì)子性、非質(zhì)子性、兩性）溶劑？ Water, H2O 1. The angle HOH is in the gaseous state, and varies from 118o to 120o in the liquid state. 2. Dipole moment, ? = D (1 Debye = ?1030 Cm) 1. 3a1 is delocalized, Lewis base, donating a pair of electrons 2. 1b1 is non binding, a weak ? donor 3. Negative partial charge of oxygen atom of ?(O) = 4. Positive partial charge ?(H) = + Results of polar structure I Water is an excellent liquid medium in which to dissolve ionic solutes 2039。41rqqFr ????1. ?0 = ?1012 Fm1, the dielectric permittivity of vacuum 2. ?r, the relative dielectric constant, ?r,H2O = 。 it consequently largely attenuates the coulomb interaction between two electrical charges. Results of polar structure II 1. Molecules are bound by up to 4 hydrogen bonds to neighboring molecules. 2. Further increase the ability to dissolve ionic solutes. Auto
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