Design of composite chitosan/algae/zeolite by freeze- or air-drying…
The physicochemical characterization of air-dried chitosan-algae-zeolite (Cs-Alg-Zl-AD) and freeze-dried chitosan-algae-zeolite (Cs-Alg-Zl-FD) were investigated by spectroscopy (FTIR, SEM-EDX, and XPS), diffraction (XRD), surface charge via pH pzc, specific surface area (SSA) and elemental analyses. The utilization of Box-Behnken Design (BBD ...
Preparation of Freeze-Dried Porous Chitosan Microspheres for …
2021年5月6日 · Results showed that freezing chitosan hydrogel beads at a temperature of −20 °C and subsequently lyophilizing the frozen structure allowed to easily obtain the porous chitosan microspheres with rough surfaces and large pores, which were more suitable for adsorption materials to remove metal ions.
Full article: Fabrication and characterization of freeze dried ...
2021年6月29日 · In the present work, preparations of Sr-BG/chitosan composite scaffolds were fabricated by freeze drying technique. The microstructure and porosity of the scaffolds were characterized by scanning electron microscopy.
XRD patterns of freeze dried chitosan scaffold and 1, 3, and 5 wt ...
For the in vitro bioactivity, Figure 6 shows the XRD patterns of freeze dried chitosan scaffold, and 1, 3, and 5 wt% Sr-BG/chitosan composite scaffolds after immersing into SBF for 7 d....
Characterization and Dissolution Study of Chitosan Freeze-Dried …
2009年10月30日 · Freeze-dried systems (L) comprising chitosan (CS) and caffeine (CAF) have been developed for oral administration. Different proportions of CS and CAF have been used in the preparation of the systems. Hot stage microscopy (HSM), differential scanning calorimetry (DSC) and X-ray diffraction powder have been used to characterize the systems prepared.
Porous Chitosan Hydrogels Produced by Physical Crosslinking ...
Chitosan hydrogels are biomaterials with excellent potential for biomedical applications. In this study, chitosan hydrogels were prepared at different concentrations and molecular weights by freeze-drying. The chitosan sponges were physically crosslinked using sodium bicarbonate as a crosslinking agent.
Freeze-drying synthesis, characterization and in vitro bioactivity …
Polycrystalline and dispersed hydroxyapatite (HAP) nanoparticles were successfully prepared via a simple precipitation method with the aid of a new capping agent based on Schiff base compounds. After that, a composite of chitosan (CT), graphene oxide (GO) and HAP nanoparticles was synthesized by a freeze-drying met
Porous Chitosan Hydrogels Produced by Physical Crosslinking
2023年5月6日 · Ernesto et al. developed chitosan dressings by a freeze-drying process and sodium bicarbonate as a physical crosslinking agent. The chitosan samples displayed interconnected porous structures with a fluid’s absorption capacity above 900%, suitable biocompatibility, cell adhesion, and proliferation of fibroblasts.
Reinforcement of freeze-dried chitosan scaffolds with multiphasic ...
2016年8月1日 · In this study porous scaffolds of chitosan (CS) and carboxymethyl cellulose (CMC) reinforced with whisker-like biphasic and triphasic calcium phosphate fibers were fabricated by freeze drying method.
Freeze-drying synthesis, characterization and - RSC Publishing
After that, a composite of chitosan (CT), graphene oxide (GO) and HAP nanoparticles was synthesized by a freeze-drying method. The as-produced Schiff base, HAP nanoparticles, and CT/GO/HAP nanocomposite were analysed by several …