Effect Of Crosslinking Time Research Articles

Effect of heat cross-linking on carbon dioxide fixed-carrier membrane structure and performance

A new fixed-carrier composite membrane prepared with poly(N-vinyl-γ-sodium aminobutyrate) (PVSA) as the active layer and a polysulfone (PS) ultrafiltration membrane as the support was previously reported. In order to improve the permselectivity and stability, the PVSA/PS composite membrane was modified by using heat cross-linking. Cross-linked PVSA/PS composite membranes possess higher selectivity, a slightly lower CO 2 permeation rate and better stability than uncross-linked membranes. The cross-linking mechanism was studied by X-ray photoelectron spectroscopy. The effect of cross-linking time on the performance of the composite membrane was also investigated.

The influence of cross-linking time on the adsorption characteristics of microcapsules containing activated charcoal prepared by gelatin-acacia coacervation.

In this study, the effect of cross-linking time on the adsorption characteristics of microcapsules containing activated charcoal (ACMC) was investigated. The microcapsules were prepared by the gelatin-acacia coacervation procedure. Activated charcoal powder was used as an adsorbent, and creatinine as a model adsorbate. The following results were obtained. The adsorption rate on ACMC could be controlled by changing the cross-linking time of the coacervate. A stable semipermeable membrane was formed by gelatin-acacia coacervation at cross-linking times greater than 60 min. Accordingly, the oral administration of ACMC should be available as a supporting technique in the treatment of patients with renal failure.