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Polyethylene-based nanocomposites have been prepared by in situ polymerisation of ethylene with mesostructured MCM-41 within a large range of nanofiller concentrations. The structural, thermal and… (More)
Abstract Polyethylene-based nanocomposites have been prepared by in-situ polymerization of ethylene with mesostructured MCM-41. Different approaches are used to improve interfacial adhesion between… (More)
We prove Riemann's theorems on extensions of functions over certain mixed characteristic analytic adic spaces, first introduced by Johansson and Newton. We use these results to reprove a theorem of… (More)
Abstract Acid mine drainage (AMD) generation is a widespread environmental problem in Europe, including Portugal. Previous experience has shown that a combined process consisting of an anaerobic… (More)
- Andreia A. Duarte, Luís Miguel Gomes Abegão, José Heleno Ribeiro, João N. P. Lourenço, Paulo António Ribeiro, Maria Raposo
- The Review of scientific instruments
- 2015
Quartz Crystal Microbalance (QCM) is a widely used technique to characterize adsorption/desorption phenomena at the solid/liquid interface. However, the obtained adsorption/desorption kinetics curves… (More)
MCM-41 micro- and nanoparticles are prepared and functionalized with silane coupling agents. These pristine and silane-decorated mesoporous MCM-41s are further used in the synthesis of… (More)
- João M. Campos, João N. P. Lourenço, Ernesto Portuondo Pérez, María L. Cerrada, M. R. Ribeiro
- Journal of nanoscience and nanotechnology
- 2009
The synthesis of self-reinforced polyethylene-based materials prepared by in-situ polymerisation is described. The methodology developed uses MCM-41 mesoporous material in a triple role: as catalyst… (More)
Abstract Several Ga-MCM-41 materials, prepared using different synthesis and template removal procedures, were used for the immobilisation of Cp 2 ZrCl 2 by a direct impregnation method. Supports… (More)
- Ant'onio J. G. Bento, João N. P. Lourenço, +4 authors María L. Cerrada
- 2012
Abstract Mixed matrix membranes, MMM, based on polyethylene, PE, and silica mesoporous material, MCM-41, have been prepared using these hybrid materials obtained by in situ polymerization in order to… (More)
- Ana E. Ferreira, María L. Cerrada, +4 authors Maria do Rosário Ribeiro
- 2016
Different nanocomposites have been attained by in situ polymerization based on ultra-high molecular weight polyethylene (UHMWPE) and mesoporous SBA-15, this silica being used for immobilization of… (More)