Polyvinyl alcohol (PVOH) has all the essential requirements to be used as an alternative precursor for carbon fiber (CF) production. Within this work, three different commercially available, thermoplastically processable PVOH grades together with ammonium salts stabilizing agents were investigated using melt spinning process regard their processing into CF filaments. Precursor filaments could spun at up to, 500 m min −1 . The distribution of over filament cross-section was evaluated...

Abstract The Cluster of Excellence ‘ Centre for Tactile Internet with Human-in-the-Loop (CeTI) ’ 1 addresses developments and inventions the use in or as smart devices many areas, such Industry 4.0, medicine skill learning. application sensor units textiles is widespread used various industry branches. Besides sensors, development textile actuating a relevant research topic. This paper discusses theoretical actuator concept that leads to ready-to-implement fiber-based electrostatic brake...

Cellulose is a renewable and environmentally friendly raw material that has an important economic technical impact in several applications. Recently, nanocellulose (NC) presented promising road to support the manufacturing of functional carbon fibers (CFs), which are considered superior materials for applications because their outstanding properties. However, smooth limited effective surface areas make CFs virtually useless some applications, such as energy storage. Therefore, strategies...

Poly(3,4‐ethylenedioxythiophene) (PEDOT), an inherently electrically conductive or conjugated polymer (CP), exhibits the potential to play a significant role in development of innovative fiber materials for use smart textiles, such as wearables. Furthermore, these fibers can function artificial muscles emerging field interactive rubber composites. This study introduces straightforward and efficient method creating PEDOT‐based, biomimetic, fiber‐shaped, linearly contracting ionic...

In this paper, the oxy-fluorination process and influence of different concentrations fluorine oxygen in gas phase on physicochemical properties polyacrylonitrile(PAN)-based carbon fibers are described. The treated structures determined by zeta potential tensiometry measurements. addition, changes surface composition morphology investigated X-ray photoelectron spectroscopy (XPS) scanning electron microscopy (SEM). Adhesion characterized single fiber pull-out (SFPO) test. Furthermore,...

Ionic liquids offer alternative methods for the sustainable processing of natural biopolymers like chitosan. The ionic liquid 1-butyl-3-methylimidazolium acetate (BmimOAc) was successfully used manufacturing pure chitosan-based monofilaments by a wet spinning process at lab-scale. Commercial chitosan with 90% deacetylation degree preparation dopes solids content 4-8 wt.%. Rheology tests were carried out characterization viscometric properties. BmimOAc as solvent and deionized water...

The control of mineral precipitation is a major challenge in several industry segments such as geothermal energy. In this study, the focus was on prevention lead and copper containing precipitations from fluids frequently found at sites exploiting sedimentary basins Rotliegend formations. A filter-material applied to remove scale-forming heavy metal ions fluid thus lowering concentration respective minerals below saturation. based cheap abundant biopolymer chitosan easily available...

Abstract The unique properties of silica, such as biocompatibility and the ability to promote cell growth, demonstrate favorable results in different applications drug delivery, biomedical applications, tissue engineering (TE). Electrospinning has emerged a method for creating substrate with high surface area structural resemblance natural extracellular matrices. A common fabricating silica nanofibers (SNFs) TE involves hybrid silica/ polymer nanofibers, which require calcination remove...

Abstract The ionic liquid 1‐ethyl‐3‐methyl‐imidazolium acetate (EMIMOAc) is used to develop a wet‐spinning process for the manufacturing of chitosan multifilament yarns on semi‐industrial pilot scale. Commercial chitosans different qualities, properties, and deacetylation degree ≤85% are prepare spinning dopes with solids content 6.0–8.5 wt.% using EMIMOAc as solvent. viscometric properties characterized by rheological tests. pure fineness filament count from prepared performed plant....

Abstract The aim of this review is to identify the literature for scientific work understand basics conduction mechanism electrically conductive filament yarns made from extrinsic con-ductive fillers and thermoplastic polymer using melt spinning. In recent years, have become very popular due their electrical conductivity received greater research attention. general, are carbon-based materials. These include carbon black (CB), nanotubes (CNT), graphene graphite. This thematic mainly focuses...

Current research focuses on advancements and breakthroughs in the realm of smart textiles, with applications spanning various industries such as medicine education. For producing flexible electrically conductive yarns (EC) are needed to transmit signals or part sensor systems. Mostly, these EC consist a polymer core an outer metallized layer. Using contact skin requires high reliability safety, thus, must maintain their functional properties long-term scale under range different stresses....

While carbon fibers (CFs) are still the most attractive reinforcement material for lightweight structures, they mostly manufactured using crude oil-based process chains. To achieve a higher eco-efficiency, partial substitution of polyacrylonitrile (PAN) by renewable materials, such as lignin, is investigated. So far, this investigation has only been carried out batch manufacturing studies, neglecting transfer and validation to continuous CF manufacturing. Therefore, work first investigate...

Today, materials designed for bone regeneration are requested to be degradable and resorbable, bioactive, porous, osteoconductive, as well an active player in the bone-remodeling process. Multiphasic silica/collagen Xerogels were shown, earlier, meet these requirements. The aim of present study was use excellent material properties process them by additive manufacturing, this case 3D plotting, generate implants matching patient specific shapes fractures or lesions. concept is have Xerogel...

In this paper, a method for the evaluation of influence different polymer suspensions and environmental conditions on adhesion between an impregnated carbon fibre heavy tow concrete reinforcement will be proposed. For purpose, impregnation material itself was investigated as film before after incubation in water aqueous suspensions, such NaOH cementitious solution, terms its thermal properties, swelling behaviour morphology. Thin films were manufactured subsequently with quantification 28 d...

In this work, typical high-performance yarns are oxy-fluorinated, such as carbon fibers, ultra-high-molecular-weight polyethylene, poly(p-phenylene sulfide) and terephthalamide). The focus is on the property changes of fiber surface, especially wetting behavior, structure chemical composition. Therefore, contact angle, XPS tensile strength measurements performed treated untreated while SEM utilized to evaluate surface structure. Different results for materials observed. While polyethylene...

Abstract Continuous load monitoring of fiber-reinforced composites represents a complex challenge for the composite sector. In this paper, development and characterization piezoelectric sensors structural health applications based on polyvinylidene fluoride (PVDF) are presented. The basic sensor structures melt spun bicomponent filaments in core-sheath configuration. core is volumetric mixture polypropylene (PP) Pre-Elec PP, PP-compound modified with carbon black. sheath made PVDF. Three...

Non-crimp fabrics (NCF) have become established in the fields of automotive, aircraft, and wind power industries, which has led to an increasing demand fiber plastic composites. In order utilize known excellent load-bearing properties NCF also reduce related disadvantages such as undulation caused by stitching yarn, inclusions resin filament breakage stitch-bonding process be addressed. Hence, alternative manufacturing technology is presented. This defined punctiform application a polyester...

Today, numerous carbon fiber (CF) reinforced plastic (CFRP) components are in continuous usage under harsh environmental conditions. New often replace damaged structural parts safety-critical applications. In addition to this, there is also no effective repair method initially restore the mechanics of these structures using dry material. The high costs CFRP not proportion their lifetime. research project IGF-19946 BR “CFRP-Repair” addresses this specific challenge. By an oxide semiconductor...

E-mobility systems require the provision of efficient, lightweight and durable battery solutions. Here, novel solutions for efficient energy storage are needed, which aim at combining performance supercapacitors with structural capabilities realized by use functional carbon fibers. To achieve fibers, different additives used to modify fibers starting precursor. Polyacrylonitrile blends nanocellulose, graphene or polycyclic aromatic hydrocarbon have been spun using solvent wet spinning....