Silica applied as mixed matrix membrane inorganic filler for gas separation: a review

Table 2 Mesoporous silica for mixed matrix membranes (MMMs) fabrication

Mesoporous silica	Silica precursor	Synthesis method	Surface area (m² g^− 1)	Pore size (nm)	Particle size (nm)	Incorporated polymer	Ref
SBA-15	Tetraethyl orthosilicate	Hydrothermal	411	4.6	–	PPO	[48]
MCM-41	Sodium metasilicate	Sol gel	851	2.7	–	PI	[9]
	Tetraethyl orthosilicate	Hydrothermal	870	3.3	–	PE	[11]
		Hydrothermal	817	2.7	56	PVDF	[5]
		Sol gel	721	2.8	440	6FDA-4MPD-DABA	[30]
			889	2.5	100–150	PSf	[32]
			889	2.5	100–150	PI	[31]
			915	2.7	100–150	PEI	[36]
	Rice straw	Sol gel	404	5.0	2–22	PEBAX	[13]
	Rice husk ash	Sol gel	295	15.35	–	PSf	[35]

PPO polyphenylene oxide, PI polyimide, PE polyethylene, PVDF polyvinylidene fluoride, 6FDA-4MPD-DABA (4,4-hexafluoroisopropylidene diphthalic anhydride) – (2,3,5,6-tetramethyl1,4-phenylene diamine) – (3,5-diaminobenzoic acid), PSf polysulfone, PEI polyethyleneimine, PEBAX polyether block amide, (−) not mentioned

ISSN: 2468-2039