15 Result(s)
within
Rainhard Machatschek
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Article
Open AccessMechanistic insights into the deformation and degradation of a 2D metal organic framework
2D metal-organic frameworks (2D-MOFs) materials can be subjected to various modes of mechanical stresses and strains in a wide range of applications, for which their mechanical properties are critical to reach...
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Open AccessAnalytical model and Monte Carlo simulations of polymer degradation with improved chain cut statistics
The degradation of polymers is described by mathematical models based on bond cleavage statistics including the decreasing probability of chain cuts with decreasing average chain length. We derive equations fo...
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Open AccessOpportunities and challenges for integrating the development of sustainable polymer materials within an international circular (bio)economy concept
The production and consumption of commodity polymers have been an indispensable part of the development of our modern society. Owing to their adjustable properties and variety of functions, polymer-based mater...
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Article
Open AccessUltrathin collagen type I films formed at the air-water interface
Collagen-based biomaterials with oriented fibrils have shown great application potential in medicine. However, it is still challenging to control the type I collagen fibrillogenesis in ultrathin films. Here, w...
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Open AccessThin-layer studies on surface functionalization of polyetherimide: Hydrolysis versus amidation
Among the high-performance and engineering polymers, polyimides and the closely related polyetherimide (PEI) stand out by their capability to react with nucleophiles under relatively mild conditions. By target...
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Open AccessCrystallization and degradation behaviour of multiblock copolyester blends in Langmuir monolayers
Supporting the wound healing of soft tissues requires fixation devices becoming more elastic while degrading. To address this unmet need, we designed a blend of degradable multiblock copolymers, which is cross...
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Open AccessDegradation kinetics of oligo(ε-caprolactone) ultrathin films: Influence of crystallinity
The potential of using crystallinity as morphological parameter to control polyester degradation in acidic environments is explored in ultrathin films by Langmuir technique. Films of hydroxy or methacrylate en...
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Open AccessHydrolytic stability of polyetherimide investigated in ultrathin films
Increasing the surface hydrophilicity of polyetherimide (PEI) through partial hydrolysis of the imide groups while maintaining the length of the main-chain was explored for adjusting its function in biomedical...
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Open AccessHighly crystalline PCL ultrathin films as thermally switchable biomaterial coatings
Semi-crystalline oligomers are explored as functionalized thermoswitchable coatings for modification of biomaterials surface. Highly crystalline oligo(ε-caprolactone) (OCL) films are prepared at the air–water ...
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Understanding the impact of crystal lamellae organization on small molecule diffusion using a Monte Carlo approach
Many physicochemical processes depend on the diffusion of small molecules through solid materials. While crystallinity in polymers is advantageous with respect to structure performance, diffusion in such mater...
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Relation between Surface Area and Surface Potential Change during (co)Polyesters Degradation as Langmuir Monolayer
Polyhydroxyalkanoates (PHAs) are degradable (co)polyesters synthesized by microorganisms with a variety of side-chains and co-monomer ratios. PHAs can be efficiently hydrolyzed under alkaline conditions and by...
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Article
The interplay between network morphology and degradation kinetics of polymers: Theoretical and experimental analysis by means of a 2D model system
Network formation by cross-linking is a common method to incorporate functions like elastic deformability, shape-memory capability or hydrogel formation into polymer materials for medical applications. Since t...
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Self-stabilized fibronectin films at the air/water interface
Fibronectin (FN) is a mediator molecule, which can connect cell receptors to the extracellular matrix (ECM) in tissues. This function is highly desirable for biomaterial surfaces in order to support cell adhes...
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Article
Open AccessInterfacial properties of morpholine-2,5-dione-based oligodepsipeptides and multiblock copolymers
Oligodepsipeptides (ODPs) with alternating amide and ester bonds prepared by ring-opening polymerization of morpholine-2,5-dione derivatives are promising matrices for drug delivery systems and building blocks...
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Article
The influence of pH on the molecular degradation mechanism of PLGA
Poly[(rac-lactide)-co-glycolide] (PLGA) is used in medicine to provide mechanical support for healing tissue or as matrix for controlled drug release. The properties of this copolymer depend on the evolution o...
