Chemical Engineering / Kimya Mühendisliği
Permanent URI for this collectionhttps://hdl.handle.net/11147/14
Browse
3 results
Search Results
Article Citation - WoS: 3Citation - Scopus: 4Microfluidic-Assisted Preparation of Nano and Microscale Chitosan Based 3d Composite Materials: Comparison With Conventional Methods(Wiley, 2022) Kimna, Ceren; Değer, Sibel; Tamburacı, Sedef; Tıhmınlıoğlu, FundaAlthough nanofillers contribute to improved physical characteristics and biological functionalities of polymer-based biomaterials, their dispersion in polymer matrices is still a challenging issue in terms of obtaining consistency for the inherent properties. To tackle this problem, homogenization techniques are applied to disperse the nanofillers in such polymers, however, these methods can cause undesired changes especially in the rheological properties and the physical structure of the biopolymer matrices. Recently, as a novel homogenization technique, microfluidization has been used to homogenize polymer nanocomposites to minimize these limitations. In this study, two different nanocomposite structures as chitosan/montmorillonite (CS/MMT) and chitosan/polyhedral oligomeric silsesquioxane nanocages (CS/POSS) were homogenized with microfluidization and investigated in terms of physical alterations. Furthermore, the effect of microfluidizer technique on material characteristics was compared with conventional homogenization techniques, i.e., ultrasonic bath and sonication in terms of solution, nano – (e.g., hydrodynamic size, drug encapsulation) and macroscopic material characteristics (e.g., porosity, mechanical properties, swelling and thermal degradation). It was found that the microfluidizer homogenization improves the physical characteristics in both nano and macroscale materials: Nanospheres obtained from CS/MMT composites showed enhanced stability, uniform size distribution (<100 nm, PDI: [removed]50%) whereas 3D porous CS/POSS scaffolds showed improved structural uniformity (i.e., homogeneous and interconnected microstructure) and enhanced thermal and mechanical properties. The obtained results indicate that the microfluidizer homogenization ensures a successful nanofiller dispersion in polymer matrices, thereby improving the biomaterial characteristics impressively compared to the sonication methods.Book International Porous and Powder Materials Symposium and Exhibition Ppm 2015, 15-18 September 2015, Izmir-Turkey(Organizing Committee of the International Porous and Powder Materials Symposium and Exhibition, 2015) Polat, Mehmet; Tanoğlu, Metin; Kılıç Özdemir, Sevgi; Polat, Mehmet; Tanoğlu, MetinWe welcome you to the International Porous and Powder Materials Symposium and Exhibition, PPM 2015. The foreword of the proceedings and the abstracts books of the previous symposium, PPM 2013 which was the first of its series, started with the following sentence: ‘Idea of organizing a symposium on porous and powder materials owes its germination to the curiosity about the “other side of the fence”.’ It was a very fitting and almost a prophetic statement because 700 participants from 50 countries hosted by PPM 2013 belonged to an incredibly wide spectrum of science and technology, who one way or another dealt with porous and powder materials. It was both a fascinating and engaging sight to have people from the cement industry sitting in the sessions related to Biological and Medical Aspects since they realized that a characterization technique used in this field may actually answer some questions in theirs. Do we not deal with the same basic questions when we truly try to understand a material no matter where it originates from or how it is being put into application?Book International Porous and Powder Materials Symposium and Exhibition Ppm 2013, 3-6 September 2013, Çeşme Izmir-Turkey(Organizing Committee of the International Porous and Powder Materials Symposium and Exhibition, 2013) Özdemir, Sevgi Kılıç; Polat, Mehmet; Tanoğlu, Metin; Kılıç Özdemir, Sevgi; Polat, Mehmet; Tanoğlu, MetinWe welcome you to the first of the International Porous and Powder Materials Symposium and Exhibition, PPM 2013. The idea of organizing a symposium on porous and powder materials owes its germination to the curiosity about the ‘other side of the fence’. We are all familiar of the mild surprise when we come accross with a research paper from a totaly unrelated field written in a completely different terminology but describing something pleasantly familiar. Just imagine the elation of a PhD student in ceramics who is trying to optimize the stability and plasticity of the green body reading about the double layer around a protein, of an environmental engineer who is attempting to flocculate a nasty sludge coming accross with the concept of aggregation of micellar structures or of a researcher in chemical engineering who is looking for the perfect catalyst seeing the SEM pictures of porous nanoparticles developed for drug delivery. The list could be extended with much better examples by the readers of this book. But the best set of words to describe these feelings is an awareness of wholeness and solidarity.