Gel-like properties of MCM-41 material and its transformation to MCM-50 in a caustic alkaline surround
- Faculty of Engineering, International Islamic University Malaysia, P.O. Box 10, 50728 Kuala Lumpur (Malaysia)
Highlights: Black-Right-Pointing-Pointer MCM-41 material transforms gradually into MCM-50 lamellar gel upon controlled exposure to 6 M KOH. Black-Right-Pointing-Pointer The formation of MCM-50 ordered gel structure occurs at KOH weight content of 40-70 wt. %. Black-Right-Pointing-Pointer MCM gel phase shows pseudoplastic behavior and possesses homogeneous matrix texture. -- Abstract: MCM-41 material, prepared by sol-gel method, reveals gel-like properties in a caustic alkaline environment, i.e., 6 M potassium hydroxide (KOH) electrolyte. The gellation of MCM-41 starts at a KOH weight ratio of 40 wt.%. The structural change of the material is verified with X-Ray diffractograms and supported by observation using Scanning Electron Microscope (SEM). As the KOH weight ratio increases, the MCM-41 hexagonal arrays structure gradually transforms into MCM-50 lamellar structure before disappearing completely at 80 wt.% KOH. The MCM gel phase is further characterized by rotational viscometry and texture analysis. The gel phase shows shear thinning or pseudoplastic behavior and possesses homogeneous matrix structure.
- OSTI ID:
- 22212462
- Journal Information:
- Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 3 Vol. 47; ISSN MRBUAC; ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
Similar Records
Controlled drug release on amine functionalized spherical MCM-41
Room temperature synthesis of Si-MCM-41 using polymeric version of ethyl silicate as a source of silica