Andreas Hartwig
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View article: PEG‐Dialdehydes/Hyperbranched Amines Based Hydrogels and their Potential as Futures Bone Adhesives
PEG‐Dialdehydes/Hyperbranched Amines Based Hydrogels and their Potential as Futures Bone Adhesives Open
The potential of aminoterminated hyperbranched polyglycerol (hPG‐NH 2 ) crosslinked by polyethylene glycol dialdehyde (DA) hydrogel as a bone adhesive is presented in this proof‐of‐concept study. The hydrogel system, crosslinked by Schiff …
View article: Adjustment of Coatings Morphology and Particle Distribution of Layered Silicates by Freeze‐Drying for Improved Gas Barriers
Adjustment of Coatings Morphology and Particle Distribution of Layered Silicates by Freeze‐Drying for Improved Gas Barriers Open
Freeze‐drying of layered silicates modified with dodecylamine (DDA) is a highly effective technique for the preparation of barrier pigments that significantly mitigate the permeation of oxygen, water vapor, and hydrogen through polymer fil…
View article: Synthesis of cyclic carbonates by addition of CO2 to epoxides at atmospheric pressure
Synthesis of cyclic carbonates by addition of CO2 to epoxides at atmospheric pressure Open
The fixation of carbon dioxide (CO2) is a critical challenge for the sustainable synthesis of chemical compounds.This study presents a highly effective catalytic system for the synthesis of cyclic carbonates through the fixation of CO2 on …
View article: Acid-base properties of polydimethylsiloxane based adhesives and their influence on adhesion to polymer surfaces
Acid-base properties of polydimethylsiloxane based adhesives and their influence on adhesion to polymer surfaces Open
This work aimed to investigate the adhesive properties of polysiloxanes (silicones) on polymer surfaces in relation to their acid-base properties. To adjust the acid-base properties of polydimethylsiloxane (PDMS) based formulations, (3-ami…
View article: Synergistic effects of hydroxyl and tertiary amine in the catalytic carbonatization of epoxides with CO2 at atmospheric pressure
Synergistic effects of hydroxyl and tertiary amine in the catalytic carbonatization of epoxides with CO2 at atmospheric pressure Open
Fixation of carbon dioxide is a key issue for the sustainable synthesis of chemical compounds. A catalyst system for the preparation of cyclic carbonates by the fixation of carbon dioxide (CO2) onto epoxides is presented. This system is de…
View article: Flame Retarded Adhesive Tapes and Their Influence on the Fire Behavior of Bonded Parts
Flame Retarded Adhesive Tapes and Their Influence on the Fire Behavior of Bonded Parts Open
Pressure-sensitive adhesive tapes are used in automotives, railway vehicles and construction, where flame retardancy is of major importance. This is why industrial applicants often buy, and industrial tape manufacturers often produce, flam…
View article: Pyrolysis and flammability of phosphorus based flame retardant pressure sensitive adhesives and adhesive tapes
Pyrolysis and flammability of phosphorus based flame retardant pressure sensitive adhesives and adhesive tapes Open
Pressure-sensitive adhesive tapes are used in a variety of applications such as construction, aircrafts, railway vehicles, and ships, where flame retardancy is essential. Especially in these applications, phosphorus-based flame retardants …
View article: Cold-set, crosslinker-free wood adhesives: A comparative study of ultrasound-extracted duck feather keratin and traditional food proteins
Cold-set, crosslinker-free wood adhesives: A comparative study of ultrasound-extracted duck feather keratin and traditional food proteins Open
International audience
View article: Freeze Drying of Organically Modified Layered Silicates as Key Step to Improve the Barrier Properties of Organic Coatings for High Power Electronics Protection
Freeze Drying of Organically Modified Layered Silicates as Key Step to Improve the Barrier Properties of Organic Coatings for High Power Electronics Protection Open
Organically modified layered silicates can be used as barrier pigments in organic coating systems to reduce the permeation of water vapor and gases, e.g., oxygen as well as harmful gases that promote corrosion. Unmodified layered silicates…
View article: Fire behavior of pressure‐sensitive adhesive tapes and bonded materials
Fire behavior of pressure‐sensitive adhesive tapes and bonded materials Open
Pressure‐sensitive adhesive tapes are used in several industrial applications such as construction, railway vehicles and the automotive sector, where the burning behavior is of crucial importance. Flame retarded adhesive tapes are develope…
View article: Succinonitrile-Polymer Composite Electrolytes for Li-Ion Solid-State Batteries─The Influence of Polymer Additives on Thermomechanical and Electrochemical Properties
Succinonitrile-Polymer Composite Electrolytes for Li-Ion Solid-State Batteries─The Influence of Polymer Additives on Thermomechanical and Electrochemical Properties Open
A plastic crystalline electrolyte (PCE) consisting of 0.4 mol/L lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) in succinonitrile (SN) was blended with poly(ethylene oxide) (PEO), poly(vinylpyrrolidone) (PVP), poly(ethylene carbonate) …
View article: Synthesis and characterization of a Schiff base crosslinked hydrogel based on hyperbranched polyglycerol
Synthesis and characterization of a Schiff base crosslinked hydrogel based on hyperbranched polyglycerol Open
Formation of a Schiff base crosslinked hydrogel based on hyperbranched aminoterminated polyglycerol and polyethylene glycol dialdehyde and a first insight on its mechanical properties.
View article: Synthesis and Application Studies of DOPO-Based Organophosphorous Derivatives to Modify the Thermal Behavior of Polybenzoxazine
Synthesis and Application Studies of DOPO-Based Organophosphorous Derivatives to Modify the Thermal Behavior of Polybenzoxazine Open
The DOPO-based flame-retardant additives DOPO-HQ, DOPO-AP and DOPO-Van were synthesized in varying numbers of phenolic hydroxyl groups and amine groups. Moreover, their influence on the polymerization of a bisphenol F-based benzoxazine, as…
View article: Multivalent non-covalent interactions lead to strongest polymer adhesion
Multivalent non-covalent interactions lead to strongest polymer adhesion Open
Multivalent interactions are quantified using AFM-based single molecule force spectroscopy showing that non-covalent interactions are ideal candidates to mediate robust adhesion.
View article: In situ polymerization monitoring of a diacrylate in an electrically conducting mesoporous nanoparticle scaffold
In situ polymerization monitoring of a diacrylate in an electrically conducting mesoporous nanoparticle scaffold Open
The properties of nanoparticle–polymer composites strongly depend on the network structure of the polymer matrix. By introducing nanoparticles into a monomer (solution) and subsequently polymerizing it, the formation of the polymer phase i…
View article: Highly porous nanocoatings tailored for inverse nanoparticle‐polymer composites
Highly porous nanocoatings tailored for inverse nanoparticle‐polymer composites Open
A novel nanoparticle‐polymer composite is proposed, named inverse nanocomposites in this work. First, a rigid percolating scaffold of nanoparticles is formed, which is filled with a matrix and then polymerized. Targeted for use in thin‐fil…
View article: Current State of Bone Adhesives—Necessities and Hurdles
Current State of Bone Adhesives—Necessities and Hurdles Open
The vision of gluing two bone fragments with biodegradable and biocompatible adhesives remains highly fascinating and attractive to orthopedic surgeons. Possibly shorter operation times, better stabilization, lower infection rates, and unn…
View article: Anodization of Aluminum in Highly Viscous Phosphoric Acid. PART 2: Investigation of Anodic Oxide Formation and Dissolution Rates
Anodization of Aluminum in Highly Viscous Phosphoric Acid. PART 2: Investigation of Anodic Oxide Formation and Dissolution Rates Open
A novel self-sticking adhesive tape for the local anodization of aluminum that can be removed without residue after anodization was developed. The extremely high viscosity of the electrolyte used in the anodization tape is the main differe…
View article: Anodization of aluminum in highly viscous phosphoric acid PART 1: Investigation of anodic oxide layers by scanning electron microscopy (SEM) and in-situ electrochemical impedance spectroscopy (in-situ EIS)
Anodization of aluminum in highly viscous phosphoric acid PART 1: Investigation of anodic oxide layers by scanning electron microscopy (SEM) and in-situ electrochemical impedance spectroscopy (in-situ EIS) Open
A newly developed self-sticking tape which can be removed without residue facilitates local anodization on aluminum in cases of repair or re-work. The most prominent difference compared to conventional bath anodization is the exceptionally…
View article: Strong and super tough: Layered ceramic‐polymer composites with bio‐inspired morphology
Strong and super tough: Layered ceramic‐polymer composites with bio‐inspired morphology Open
Bio‐inspired layered ceramic‐polymer composites with high strength and toughness were prepared from sintered aluminum oxide ceramic sheets and cationically curing epoxy resins toughened with poly(ε‐caprolactone) ( PCL ). The architecture o…
View article: Secondary dispersion‐based reactive pressure‐sensitive adhesives with improved tack
Secondary dispersion‐based reactive pressure‐sensitive adhesives with improved tack Open
Reactive pressure‐sensitive adhesives (PSA) have to meet the requirements for sufficient tack prior to crosslinking but also high shear after crosslinking. This article examines the use of secondary acrylic dispersions with reactive groups…
View article: Optimal orientation for angularly segmented multifocal corrections
Optimal orientation for angularly segmented multifocal corrections Open
Purpose Evaluate the importance of orientation of multifocal lens designs with angular increments of addition. Methods Optical properties of one monofocal and three multifocal designs were analysed with the visual Strehl ratio ( VSOTF ) me…