9 documents found, page 1 of 1

Emerging applications of Sterculia striata gum in medical, pharmaceutical, and ...

Trees of the genus Sterculia produce acidic polysaccharides with high viscosity and the ability to form gels in water. This work emphasized the species Sterculia striata and the uses of its plant derivatives, such as seeds, fruits, stem bark, and exudates. The species showed prospects for industrial application (seeds with high protein content, fruits with antioxidant potential, and stem bark with anti-inflamma...

Chitosan/collagen biomembrane loaded with 2,3-dihydrobenzofuran for the treatme...

In this work, chitosan/collagen-based membranes loaded with 2,3-dihydrobenzofuran (2,3-DHB) were developed through a simple solvent-casting procedure for use in the treatment of cutaneous Leishmaniasis. The obtained membranes were characterized by elemental analysis, FTIR, TG, DSC, and XRD. Porosity, swelling, mechanical properties, hydrophilicity, and antioxidant activity were analyzed. In addition, assessment...

Synthetic chlorin derivative self-prevented from aggregation: behavior in homog...

Chondroitin sulfate immobilization at the surface of electrospun nanofiber mesh...

Aiming at improving the biocompatibility of biomaterial scaffolds, surface modification presents a way to preserve their mechanical properties and to improve the surface bioactivity. In this work, chondroitin sulfate (CS) was immobilized at the surface of electrospun poly(caprolactone) nanofiber meshes (PCL NFMs), previously functionalized by UV/O3 exposure and aminolysis. Contact angle, SEM, optical profilomet...

Glycerol-derived polyurethane nanocomposites containing cellulose nanowhiskers ...

This work describes the synthesis of glycerol-derived polyurethane nanocomposite films containing unmodified cellulose nanowhiskers (CNW) or hexamethylene diisocyanate-modified cellulose nanowhiskers (HDICNW) as a mechanical support.  Cellulose was prepared from sugarcane bagasse using a delignification and whitening approach that is wholly free of chlorine. CNW’s were obtained by acid hydrolysis in hydrochlori...

Chondroitin sulfate immobilization at the surface of electrospun nanofiber mesh...

Aiming at improving the biocompatibility of biomaterial scaffolds, surface modification presents a way to preserve their mechanical properties and to improve the surface bioactivity. In this work, chondroitin sulfate (CS) was immobilized at the surface of electrospun poly(caprolactone) nanofiber meshes (PCL NFMs). The immobilization was performed with 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDC)/N-hydro...

IPN hydrogels based on PNIPAAm and PVA-Ma networks: characterization through me...

IPN hydrogels based on chemically modified poly(vinyl alcohol) (or PVA-Ma), with different degrees of substitution (DS), and poly(N-isopropylacrylamide) (or PNIPAAm) were obtained and characterized through measures of LCST, swelling ratio and mechanical properties. Linear PVA-Ma with several DS were obtained through the chemical reaction of PVA with glycidyl methacrylate (GMA). The DS of various PVA-Ma were det...

Síntese e caracterização físico-química de reticulados tridimensionais derivado...

Foram estudadas, neste trabalho, interacões por complexos de transferência de carga, através de medidas gravimétricas do grau de inchamento de géis de poli(isopreno) reticulado,contendo grupos aceptores de carga, em presença de grupos doadores de carga, de pequeno peso molecular, dissolvidos em tolueno. Para este fim, poli(isopreno) sintético proveniente da COPERBO - Companhia Pernambucana de Borracha Sintética...

Miscibilidade e separação de fases de blendas polimericas

Orientador : Suzana Pereira Nunes; Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Quimica; Doutorado