Study curing of epoxy resin by Isophoronediamine/ Triethylenetetramine and reinforced with montmorillonite and effect on compressive strength.

Epoxy is a widely used thermosetting resin recognized for its exceptional performance in adhesives, coatings, and various other applications, attributed to its high tensile strength, stiffness, electrical performance, and chemical resistance. Epoxy-clay nanocomposites are extensively employed across diverse industries. The physical and chemical properties of these nanocomposites are influenced by the processing methods, clay modifiers, and curing agents used during their preparation.

Evaluation of chlorophyll-loaded mesoporous silica nanoparticles for photodynamic therapy on cancer cell lines.

Chlorophyll (Chl) is a promising natural photosensitizer (PS) in photodynamic treatment (PDT). Mesoporous silica nanoparticles (MSNs) were chosen to increase the effectiveness of PDT. This study aimed to evaluate the synergistic efficacy of chlorophyll-loaded mesoporous silica nanoparticles (Chl-MSNs) with photodynamic therapy (PDT) and to investigate their potential toxicity in HepG2, MDA-MB-231, and HSF cell lines.

Synthesis, characterization and antimicrobial activity applications of grafted copolymer alginate--poly(-vinyl imidazole).

-Vinyl imidazole was grafted onto sodium alginate (PVI--NaAlg) through a free radical polymerization technique in aqueous solution using potassium persulfate (KSO, KPS) initiator material. The conditions of the grafting process onto sodium alginate were adjusted to obtain a grafted copolymer with a high percentage of poly(-vinyl imidazole). The prepared grafted copolymer sodium alginate (NaAlg--PVI), with high percentage yield, was investigated and characterized under certain conditions in order to detect its antibacterial effect.

Light-sensitive dextran-covered PNBA nanoparticles to continuously or discontinuously improve the drug release.

In this work, photo-sensitive core/shell nanoparticles (NPs) based on biocompatible dextran-g-poly(o-nitrobenzyl acrylate) copolymers (Dex-g-PNBA), containing dextran as hydrophilic backbone and PNBA as photosensitive grafts, were formulated using two processes. In the first process (nanoprecipitation), NPs were prepared using preformed Dex-g-PNBA copolymers. Using the second process (emulsion/organic solvent evaporation), "clicked" or "unclicked" NPs were obtained carrying out (or not) an interfacial in situ click chemistry, respectively.

Light-sensitive dextran-covered PNBA nanoparticles as triggered drug delivery systems: Formulation, characteristics and cytotoxicity.

Hypothesis: For some years, smart nano-objects are one of the main focuses of current research. In the framework of polymeric nanomedicine, o-nitrobenzyl alcohol derivatives lead to light-responsive polymeric materials. At this day, nanomedicine based on polysaccharide/poly(o-nitrobenzyl acrylate) (PNBA) copolymers have never been reported.

Amphiphilic photosensitive dextran-g-poly(o-nitrobenzyl acrylate) glycopolymers.

Among all photosensitive monomers reported in the literature, o-nitrobenzyl acrylate (NBA) was selected in this present study. Two strategies were compared to produce azido-terminated poly(o-nitrobenzyl acrylate) (PNBA) using controlled Single Electron Transfer-Living Radical Polymerization (SET-LRP). In a parallel way, dextran (Dex) was modified by the introduction of several alkynyl-terminated hydrophobic chains.