碱溶解石英尾砂制备SiO_2气凝胶及其性能表征
|
摘要
以玻璃工业的废弃物石英尾砂为原料,经活化处理,烧碱溶解,溶胶-凝胶法,常压梯度干燥制备SiO_2气凝胶,通过单因素试验确定了工艺过程的活化温度、活化时间、硅碱比、溶解时间、溶胶-凝胶pH值。对该工艺下制得的产品进行了FT-IR、XRD、SEM、N-吸附测试,结果表明,制得了以SiO_2网络为骨架的单组分非晶态气凝胶,SiO_2气凝胶的密度为0.12 g/cm~3,BET表面积为586.63 m~2·g~(-1),BJH平均孔径20.13 nm,BJH累积孔容为2.55 cm·g~(-1)。
SiO_2 aerogel was prepared using the raw material of quartz tail-sand derived from glass industry by the process of tail-sand activation pretreatment,alkali-dissolving,sol-gel method and ambient gradient drying.The factors influenced the transformation rate of quartz tail-sand mainly were ratio of tail-sand to sodium hydroxide,activation temperature,activation time,dissolution time and p H value of sol-gel reaction,which were investigated by single factor experiments.Finally,the optimum process conditions were determined.The product prepared under the optimum process conditions was characterized by FT-IR,XRD,SEM,and N_2-adsorption,the results indicated that the SiO_2 aerogel prepared was one-component amorphous material with the skeleton of inorganic polymer SiO_2 network,the density was 0.12 g/cm~3,BET surface area was 586.63m~2·g~(-1),BJH average pore diameter was 20.13 nm,BJH cumulative pore volume was 2.55cm~3·g~(-1).
SiO_2 aerogel was prepared using the raw material of quartz tail-sand derived from glass industry by the process of tail-sand activation pretreatment,alkali-dissolving,sol-gel method and ambient gradient drying.The factors influenced the transformation rate of quartz tail-sand mainly were ratio of tail-sand to sodium hydroxide,activation temperature,activation time,dissolution time and p H value of sol-gel reaction,which were investigated by single factor experiments.Finally,the optimum process conditions were determined.The product prepared under the optimum process conditions was characterized by FT-IR,XRD,SEM,and N_2-adsorption,the results indicated that the SiO_2 aerogel prepared was one-component amorphous material with the skeleton of inorganic polymer SiO_2 network,the density was 0.12 g/cm~3,BET surface area was 586.63m~2·g~(-1),BJH average pore diameter was 20.13 nm,BJH cumulative pore volume was 2.55cm~3·g~(-1).
引文
[1]Hajar M,Luisa D,António P.An overview on silica aerogels synthesis and different mechanical reinforcing strategies[J].Journal of Non-Crystalline Solids,2014,385:55-74.
[2]熊刚,陈晓红,吴文军,等.柔韧性二氧化硅气凝胶的研究进展[J].硅酸盐通报,2010,29(5):1079-1084.
[3]Alireza D,Siamak M,Hosseinali O.Effect of water content on properties of one-step catalyzed silica aerogels via ambient pressure drying[J].Journal of Non-Crystalline Solids,2014,405:135-140.
[4]史亚春,李铁虎,吕婧,等.气凝胶材料的研究进展[J].材料导报A:综述篇,2013,27(5):20-23.
[5]雷宇.凤阳石英尾砂资源再利用现状及对策研究[J].重庆科技学院学报(社会科学版).2012,(18):78-81.
[6]赵晶晶,赵欢,唐诗慧,等.工业废弃二氧化硅制水玻璃的正交试验研究[J].辽宁工业大学学报(自然科学版),2014,34(4):261-264.
[7]方俊.粉煤灰渣湿法制备水玻璃和白炭黑工艺研究[D].淮南市,安徽理工大学,2013.
[8]Uzma K H B,In-Keun J,Chang-Sun P,et al.Optically transparent silica aerogels based on sodium silicate by a two step sol-gel process and ambient pressure drying[J].Solid State Sciences,2013,18:50-57.
[9]唐克,洪新,张智敏,等.工业废弃二氧化硅制水玻璃的研究[J].辽宁工业大学学报(自然科学版),2012,32(4):248-250.
[10]张明,史铁钧,文听雷,等.多次疏水改性Si O2气凝胶的制备及其性能表征[J].化学推进剂与高分子材料,2013,11(1):72-75.
[11]郑文芝,陈砺,黄湘桦,等.共聚法制备疏水性Si O2气凝胶[J].化工学报,2011,61(1):248-253.
[2]熊刚,陈晓红,吴文军,等.柔韧性二氧化硅气凝胶的研究进展[J].硅酸盐通报,2010,29(5):1079-1084.
[3]Alireza D,Siamak M,Hosseinali O.Effect of water content on properties of one-step catalyzed silica aerogels via ambient pressure drying[J].Journal of Non-Crystalline Solids,2014,405:135-140.
[4]史亚春,李铁虎,吕婧,等.气凝胶材料的研究进展[J].材料导报A:综述篇,2013,27(5):20-23.
[5]雷宇.凤阳石英尾砂资源再利用现状及对策研究[J].重庆科技学院学报(社会科学版).2012,(18):78-81.
[6]赵晶晶,赵欢,唐诗慧,等.工业废弃二氧化硅制水玻璃的正交试验研究[J].辽宁工业大学学报(自然科学版),2014,34(4):261-264.
[7]方俊.粉煤灰渣湿法制备水玻璃和白炭黑工艺研究[D].淮南市,安徽理工大学,2013.
[8]Uzma K H B,In-Keun J,Chang-Sun P,et al.Optically transparent silica aerogels based on sodium silicate by a two step sol-gel process and ambient pressure drying[J].Solid State Sciences,2013,18:50-57.
[9]唐克,洪新,张智敏,等.工业废弃二氧化硅制水玻璃的研究[J].辽宁工业大学学报(自然科学版),2012,32(4):248-250.
[10]张明,史铁钧,文听雷,等.多次疏水改性Si O2气凝胶的制备及其性能表征[J].化学推进剂与高分子材料,2013,11(1):72-75.
[11]郑文芝,陈砺,黄湘桦,等.共聚法制备疏水性Si O2气凝胶[J].化工学报,2011,61(1):248-253.