基于硅溶胶形核剂的柔性二氧化硅气凝胶的研究

doi:10.11896/cldb.22080230

Abstract
Figure/Table
References
Related Citation (15)

Download:

Full Text ( PDF ) (17360KB)
Export: BibTeX | EndNote (RIS)

Abstract Flexible silica aerogels having excellent flexibility, which solves the problems of easy breakage and poor formability, have received extensive attention. However, most flexible aerogels’ skeletons show fragile connections like pearl chains with a low cross-linking degree, which results in poor mechanical properties. In this paper, silica sol is introduced into the dual precursor system of methyltriethoxysilane and dimethyldiethoxysilane. Because of large amounts of-OH groups on nano-SiO₂ particles in silica sol, a large number of nucleation sites were provided during the gel process, thus enhancing the crosslinking degree of aerogels and refining the size of secondary particles. The results show that compared with the aerogel without silica sol, the aerogel secondary particles with silica sol change from smooth spherical to fine irregular, and the average size decreases from 3.80 μm to 0.36 μm. The connection between the fine particles is tighter, which avoids the "necked" weak connection between spherical particles. The flexible silica aerogel prepared in this paper can withstand 80% compression and its morphology can be completely recovered after unloading. It can withstand more than 20 cyclic compressions with a strain of 60% and more than 50 cyclic adsorptions of organic pollutants. It also has good cyclic compression performance and cyclic adsorption performance. The flexible silica aerogel shows excellent hydrophobicity (surface contact angle up to 162.4°) and adsorption performance of organic pollutants (the adsorption capacity of n-hexane is 9.57 g/g). The flexible silica aerogel also has good thermal stability, and the maximum degradation rate temperature can reach 501.2 ℃ in a dry air environment.

Key words： hydrophobic flexible aerogel oil-water separation silica sol

Published: Online: 2023-12-19

CLC number:

0648

	Service
	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	WANG Lili
	TANG Jie
	QIN Luyang
	LI Xuesha
	NIE Chaoyin

Cite this article:

WANG Lili,TANG Jie,QIN Luyang, et al. Study on Flexible Silica Aerogel Based on Silica Sol Nucleating Agent[J]. Materials Reports, 2023, 37(24): 22080230-6.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.22080230 OR http://www.mater-rep.com/EN/Y2023/V37/I24/22080230

1 Zhang F, Su D, He J, et al. Materials Letters, 2019, 238, 202.
2 Feng J, Le D, Nguyen S T, et al. Colloids and Surfaces A:Physicoche-mical and Engineering Aspects, 2016, 506, 298.
3 Hung W C, Horng R S, Shia R E. Journal of Sol-Gel Science and Technology, 2021, 97(2), 414.
4 Yu Z L, Yang N. Angewandte Chemie-International Edition, 2018, 57(17), 4538.
5 Han H, Wei W, Jiang Z, et al. Colloids and Surfaces A:Physicochemical and Engineering Aspects, 2016, 509, 539.
6 Valo H, Arola S, Laaksonen P, et al. European Journal of Pharmaceutical Sciences, 2013, 50(1), 69.
7 Wang X, Dou L, Yang L, Yu J, Ding B, et al. Journal of Hazardous Materials, 2017, 324, 203.
8 Qiu B, Xing M, Zhang J, et al. Journal of the American Chemical Society, 2014, 136(16), 5852.
9 Yeon K, Dinesh L, Vinayak B M, et al. Journal of the Korean Ceramic Society, 2020, 57(1), 1.
10 Li L, Yalcin B, Nguyen B N, et al. ACS Applied Materials & Interfaces, 2009, 1(11), 2491.
11 Guo X, Shan J, Lai Z, et al. Molecules, 2018, 23(4).
12 Zhang Y, Shen Q, Li X, et al. RSC Advances, 2020, 10(69), 42297.
13 Yu Y, Wu X, Guo D, Fang J, et al. Journal of Materials Science, 2014, 49(22), 7715.
14 Randall J P, Meador M A B, Jana S C, et al. ACS Applied Materials & Interfaces, 2011, 3(3), 613.
15 Zu G, Kanamori K, Shimizu T, et al. Chemistry of Materials, 2018, 30(8), 2759.
16 Kanamori B K, Aizawa M, Nakanishi K, et al. Advanced Materials, 2010, 19(12), 1589.
17 Guo X, Yu H, Yang H, et al. Journal of Porous Materials, 2013, 20(6), 1477.
18 Guo X, Li W, Yang H, et al. Journal of Sol Gel Science & Technology, 2013, 406.
19 Ilharco L M, Fidalgo A, Farinha P S, et al. Journal of Materials Chemistry, DOI:10. 1039/b703631k.
20 Fidalgo A, Farinha J P S, Martinho J M G, et al. Chemistry of Materials, 2007, 19(10), 2603.
21 Li M, Jiang H, Xu D, et al. Journal of Non-Crystalline Solids, 2016, 452, 187.
22 Li Z, Cheng X, He S, et al. Composites Part A:Applied Science and Manufacturing, 2016, 84, 316.
23 Zhang Y, Shen Q, Li X, et al. Materials Chemistry Frontiers, DOI:10. 1039/D1QM00206F.
24 Mu L, Yang S, Hao B, et al. Polymer Chemistry, 2015, 6(32), 5869.
25 He X, Tang B, Cheng X, et al. Journal of Colloid and Interface Science, 2021, 600, 764.
26 Gao H, Bo L, Liu P, et al. Solar Energy Materials and Solar Cells, 2019, 201, 110122.
27 Wang L, Song G, Qiao X, et al. Langmuir, 2019, 35(26), 8692.
28 Temnikov M N, Kononevich Y N, Popov A Y, et al. ChemistrySelect, 2020, 5(17), 5014.
29 Shao Z, He X, Cheng X, et al. Materials Letters, 2017, 204, 93.
30 Luo Z, Li D, Huang L, et al. Journal of Materials Science, 2020, 55(27), 12884.
31 Guan L Z, Gao J F, Pei Y B, et al. Carbon, 2016, 107, 573.
32 Chen D, Wang D, et al. Acs Applied Materials & Interfaces, DOI: 10. 1021/acsami. 6b02829.
33 Nabipour H, Nie S, Wang X, et al. Cellulose, 2020, 27(4), 2237.
34 Zou L, Phule A D, Sun Y, et al. Polymer Testing, 2020, 85, 106451.
35 Lang X H, Zhu T Y, Zou L, et al. Progress in Organic Coatings, 2019, 137, 105370.
36 Mazrouei-Sebdani Z, Salimian S, Khoddami A, et al. Materials Research Express, 2019, 6(8), 1591.