Biodegradable polyhydroxybutyrate (PHB) films were fabricated using acetic acid as an alternative to common solvents such chloroform. The PHB prepared a solvent casting process at temperatures ranging from 80 °C 160 °C. crystallinity, mechanical properties and surface morphology of the cast different characterized compared chloroform solvent. Results revealed that film varied considerably with temperature. In general, samples processed low had comparable This based method is environmentally...

Poultry feather quills have been extruded in a twin screw extruder with sodium sulfite treatment as reducing agent. The effect of four different plasticizers (ethylene glycol, propylene glycerol, and diethyl tartrate) on the thermoplastic properties was then investigated. Conformational changes plasticizer-protein interactions resins were assessed by Fourier transform infrared spectroscopy (FTIR), while viscoelastic behavior quill keratin plasticized investigated dynamic mechanical analysis...

Abstract Accurate monitoring of physiological temperatures is important for the diagnosis and tracking various medical conditions. This work presents design, fabrication, characterization temperature sensors using conductive polymer composites (CPCs) patterned on both flexible stretchable substrates through drop coating direct ink writing (DIW). These were formed a high melting point biopolymer polyhydroxybutyrate (PHB) as matrix graphenic nanomaterial reduced graphene oxide (rGO) nanofiller...

We demonstrate a simple, nonlithographic method for fabricating piezoresistive pressure sensors with broad range of working pressures and low detection limit. Our wearable sensor is fabricated by using two metallized, porous polymer layers which undergo change in resistance as function pressure. This has sandwich structure composed top bottom sheets polydimethylsiloxane (PDMS) simple templating method. The inner face each these coated layer conductive silver nanowires (AgNWs). AgNW are...

The physiological milieu of healthy skin is slightly acidic, with a pH value between 4 and 6, whereas for chronic or infected wounds, the above 7.3. As testing an effective way to monitor status novel smart hydrogel wound patch incorporating modified indicator dyes was developed in this study. Phenol red (PR), dye molecule, successfully methacrylate (MA) allow copolymerization alginate/polyacrylamide (PAAm) matrix. This covalent attachment prevented from leaching out prepared pH-responsive...

Polyimide is one of the most popular substrate materials for microfabrication flexible electronics, while polydimethylsiloxane (PDMS) widely used stretchable substrate/encapsulant material. These two polymers are essential in fabricating devices microfluidics, bioelectronics, and internet things; bonding these together a crucial challenge. In this work, we employ click chemistry at room temperature to irreversibly bond polyimide PDMS through thiol-epoxy bonds using different methods. first...

Two major obstacles to utilizing polyhydroxybutyrate (PHB)-a biodegradable and biocompatible polymer-in commercial applications are its low tensile yield strength (<10 MPa) elongation at break (~5%). In this work, we investigated the modification of mechanical properties PHB through use a variety bio-derived additives. Poly(lactic acid) (PLA) sugarcane-sourced cellulose nanocrystals (CNCs) were proposed as reinforcing elements, epoxidized canola oil (eCO) was utilized green plasticizer. Zinc...

Light-responsive ligands are useful tools in biochemistry and cell biology because the function of these can be spatially temporally controlled. Conventional design such relies on previously available data about structure both ligand receptor. In this paper, we describe de novo discovery light-responsive through screening a genetically encoded library. We ligated photoresponsive azobenzene core to random CX7C peptide library displayed coat protein M13 phage. A one-pot alkylation/reduction...

A rapid, efficient technique for the attachment of bacteriophages (phages) onto polyhydroxyalkanoate (PHA) surfaces has been developed and compared to three reported methods phage immobilization. Polymer were modified facilitate using (1) plasma treatment alone, (2) followed by activation 1-ethyl-3-(3-(dimethylamino)propyl)carbodiimide hydrochloride (EDC) N-hydroxysulfosuccinimide (sulfo-NHS), (3) plasma-initiated acrylic acid grafting, or (4) grafting with EDC sulfo-NHS. The impact each...

Hydrogen production in the microfluidic alkaline membraneless electrolyzer (μAME) marks a new paradigm sustainable energy technology. One challenge this field is implementing bifunctional catalyst to catalyze hydrogen evolution reaction and oxygen using methods compatible with microfabrication techniques. Herein, scalable synthesis, micropatterning, performance of nickel nitride (Ni3N/Ni) are demonstrated. Microfabrication used pattern Ni microelectrodes, nitridation N–H grafting...

We have investigated the properties of thermally-responsive, patterned liquid crystalline polymers as their dimensions are scaled to a size suitable for use in microelectromechanical systems. All samples were fabricated using surface alignment and photopatterning techniques that can be used produce integrated devices anchored on substrate. The thermomechanical free-standing macroscopic with varying concentration crosslinking molecules order optimize thermal response material. It was found...

Abstract The optoelectronic and photophysical properties of four regioregular poly[3‐(carboxyalkyl)thiophene‐2,5‐diyl] (P3CAT) with different carboxyalkyl chain lengths (propyl to hexyl) are reported. Each P3CAT is combined [6,6]‐phenyl‐C 61 ‐butyric acid methyl ester form the photoactive bulk heterojunction layer for organic photovoltaic devices. extent hydrogen bonding polymer crystallinity in films has been determined through infrared spectroscopy X‐ray diffraction. mechanical analyzed...

We present a nanozyme-based biosensor fabricated from nanostructured Ni films deposited onto silicon wafer by glancing angle deposition (GLAD) for enzyme-free colorimetric monitoring of uric acid (UA), biomarker gout, high blood pressure, heart disease, and kidney disease. The helically structured GLAD nanozymes exhibit excellent peroxidase-like activity to accelerate the oxidation reaction colorless 3,3',5,5'-tetramethylbenzidine (TMB) blue product, oxidized TMB (oxTMB), mediated H2O2. In...