Radiation Synthesis of Carbon/Aluminum/Silica Aerogel Nanoporous Structure Derived from Polyacrylamide Hydrogel for High Temperature and Oil Removal Applications

被引：2

作者：

Ghobashy, Mohamed Mohamady ^{[1
]}

Bassioni, Ghada ^{[2
]}

Zaher, Ahmed ^{[3
]}

El-Wahab, H. Abd ^{[4
]}

Nady, Norhan ^{[5
]}

El-Sayed, Amira ^{[6
]}

Osman, Amr ^{[6
]}

El-Sattar, Nour El-din Ahmed Abd ^{[6
]}

机构：

[1] Natl Ctr Radiat Res & Technol NCRRT, Radiat Res Polymer Chem Dept, Egyptian Atom Energy Author EAEA, POB 8029, Cairo, Egypt

[2] Ain Shams Univ, Fac Engn, Cairo 11517, Egypt

[3] El Mansoura Univ, Fac Sci, Chem Dept, Mansoura 35516, Egypt

[4] Al Azher Univ, Dept Chem Fac Sci, POB 11754, Cairo 11754, Egypt

[5] Polymer Mat Res Dept, City Sci Res & Technol Applicat SRTA City, Borg El Arab City 21934, Alexandria, Egypt

[6] Ain Shams Univ, Fac Sci, Dept Chem, Cairo 11517, Egypt

来源：

ACS OMEGA | 2023年 / 8卷 / 23期

关键词：

CARBON AEROGELS; GAMMA-RADIATION; SOL-GEL; COMPOSITE; SOIL; POLYMERIZATION; CONDUCTIVITY; PERFORMANCE; ENERGY;

D O I：

10.1021/acsomega.2c07335

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Aerogel is a high-performance thermal resistance materialdesiredfor high-temperature applications like dye-sensitized solar cells,batteries, and fuel cells. To increase the energy efficiency of batteries,an aerogel is required to reduce the energy loss arising from theexothermal reaction. This paper synthesized a different compositionof inorganic-organic hybrid material by growing the silicaaerogel inside a polyacrylamide (PAAm) hydrogel. The hybrid PaaS/silicaaerogel was synthesized using different irradiation doses of gammarays (10-60 kGy) and different solid contents of PAAm (6.25,9.37, 12.5, and 30 wt %). Here, PAAm is used as an aerogel formationtemplate and carbon precursor after the carbonization process at atemperature of (150, 350, and 1100 degrees C). The hybrid PAAm/silicaaerogel was converted into aluminum/silicate aerogels after soakingin a solution of AlCl3. Then, the carbonization processtakes place at a temperature of (150, 350, and 1100 degrees C) for 2 hto provide C/Al/Si aerogels with a density of around 0.18-0.040 gm/cm(3) and porosity of 84-95%. The hybrid C/Al/Si aerogelspresented interconnected networks of porous structures with differentpore sizes depending on the carbon and PAAm contents. The sample witha solid content of 30% PAAm in the C/Al/Si aerogel was composed ofinterconnected fibrils whose diameter was about 50 mu m. The structureafter carbonization at 350 and 1100 degrees C was a condensed openingporous 3D network structure. This sample gives the optimum thermalresistance and a very low thermal conductivity of 0.073 (w/m center dot k)at low carbon content (2.71% at temperature 1100 degrees C) and high v (pore) (95%) compared with carbon content 42.38%and v (pore) (93%) which give 0.102 (w/m center dot k).This is because at 1100 degrees C, the carbon atoms evolve to leavean area between Al/Si aerogel particles, increasing the pore size.Furthermore, the Al/Si aerogel had excellent removal ability for variousoil samples.

引用

页码：20283 / 20292

页数：10