Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Improved mechanical and swelling behavior of the composite hydrogels prepared by ionic monomer and acid-activated Laponite
AbstractA composite hydrogel (CH) with much improved mechanical and swelling properties was prepared using an ionic monomer and acid-activated Laponite XLS which was used as a cross-linking agent. Addition of acid-activated clay solved the gelation problem when ionic monomers were added to clay mineral dispersions. Reaction of Laponite XLS with sulfuric acid yielded amorphous silica. A dispersion of the acid-activated Laponite and the monomers was used to synthesize composite hydrogels by in-situ polymerization. The FT-IR spectra and rheological results of the composite hydrogels demonstrated the formation of a network. The equilibrium swelling ratios of composite hydrogels (>6000g/g) were more than 18 times larger than traditional organic cross-linked hydrogels. The moduli G′ and G″ in the observed frequency range were about 4 and 10 times larger than those of organic cross-linked hydrogel (OR gel). The improvement in both the equilibrium swelling ratio and mechanical strength was attributed to the homogeneous cross-linked network structure.
Improved mechanical and swelling behavior of the composite hydrogels prepared by ionic monomer and acid-activated Laponite
AbstractA composite hydrogel (CH) with much improved mechanical and swelling properties was prepared using an ionic monomer and acid-activated Laponite XLS which was used as a cross-linking agent. Addition of acid-activated clay solved the gelation problem when ionic monomers were added to clay mineral dispersions. Reaction of Laponite XLS with sulfuric acid yielded amorphous silica. A dispersion of the acid-activated Laponite and the monomers was used to synthesize composite hydrogels by in-situ polymerization. The FT-IR spectra and rheological results of the composite hydrogels demonstrated the formation of a network. The equilibrium swelling ratios of composite hydrogels (>6000g/g) were more than 18 times larger than traditional organic cross-linked hydrogels. The moduli G′ and G″ in the observed frequency range were about 4 and 10 times larger than those of organic cross-linked hydrogel (OR gel). The improvement in both the equilibrium swelling ratio and mechanical strength was attributed to the homogeneous cross-linked network structure.
Improved mechanical and swelling behavior of the composite hydrogels prepared by ionic monomer and acid-activated Laponite
Li, Peng (Autor:in) / Kim, Nam Hoon (Autor:in) / Hui, David (Autor:in) / Rhee, Kyong Yop (Autor:in) / Lee, Joong Hee (Autor:in)
Applied Clay Science ; 46 ; 414-417
14.10.2009
4 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Swelling behavior of polyacrylamide/laponite clay nanocomposite hydrogels: pH-sensitive property
| British Library Online Contents | 2009
Novel PAAm/Laponite clay nanocomposite hydrogels with improved cationic dye adsorption behavior
| British Library Online Contents | 2008
Swelling Behaviour of Super-absorbent Laponite Hydrogel under One-dimensional Loading
| Springer Verlag | 2024
Swelling behaviours and mechanical properties of silk fibroin-polyurethane composite hydrogels
| British Library Online Contents | 2013