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https://www.readbyqxmd.com/read/28912434/food-grade-filler-particles-as-an-alternative-method-to-modify-the-texture-and-stability-of-myofibrillar-gels
#1
Andrew J Gravelle, Shai Barbut, Alejandro G Marangoni
A series of food grade particles were characterized for their potential as fillers in myofibrillar gels. The fillers were separated into (i) hydrophilic, insoluble, crystalline particles and (ii) starch granules. The particles used were microcrystalline cellulose, oat fiber and walnut shell flour, as well as potato and tapioca starches. Crystalline particles increased hardness and decreased recovery properties. Although all of these fillers decreased the T2 relaxation time of water, this was dependent on particle type and size...
September 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28898065/synergistic-coupling-between-li6-75la3zr1-75ta0-25o12-and-poly-vinylidene-fluoride-induces-high-ionic-conductivity-mechanical-strength-and-thermal-stability-of-solid-composite-electrolytes
#2
Xue Zhang, Ting Liu, Shuofeng Zhang, Xin Huang, Bingqing Xu, Yuanhua Lin, Ben Xu, LiangLiang Li, Ce-Wen Nan, Yang Shen
Easy processing and flexibility of polymer electrolytes make them very promising in developing all-solid-state lithium batteries. However, their low room-temperature conductivity, and poor mechanical and thermal properties still hinder their applications. Here, we use Li6.75La3Zr1.75Ta0.25O12 (LLZTO) ceramics to trigger structural modification of poly(vinylidene fluoride) (PVDF) polymer electrolyte. By combining experiments and first-principle calculations, we find that La atom of LLZTO could complex with N atom and C=O group of solvent molecule such as N,N-dimethylformamide along with electrons enriching at the N atom, which behaves like Lewis-base and induces the chemical dehydrofuluorination of PVDF skeleton...
September 12, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28892655/bonding-to-cad-cam-composites-an-interfacial-fracture-toughness-approach
#3
M Eldafrawy, M G Ebroin, P A Gailly, J-F Nguyen, M J Sadoun, A K Mainjot
The objective of this study was to evaluate the interfacial fracture toughness (IFT) of composite cement with dispersed filler (DF) versus polymer-infiltrated ceramic network (PICN) computer-aided design and computer-aided manufacturing (CAD-CAM) composite blocks after 2 different surface pretreatments using the notchless triangular prism (NTP) test. Two DFs (Cerasmart [CRT] and Lava Ultimate [LVA]), 2 PICNs (Enamic [ENA] and experimental PICN [EXP]), and e.max CAD lithium disilicate glass-ceramic (EMX, control) prism samples were bonded to their counterparts with Variolink Esthetic DC composite cement after either hydrofluoric acid etching (HF) or gritblasting (GR)...
September 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28885020/facile-aqueous-route-to-nitrogen-doped-mesoporous-carbons
#4
Jianan Zhang, Yang Song, Maciej Kopeć, Jaejun Lee, Zongyu Wang, Siyuan Liu, Jiajun Yan, Rui Yuan, Tomasz Kowalewski, Michael R Bockstaller, Krzysztof Matyjaszewski
An aqueous-based approach for the scalable synthesis of nitrogen-doped porous carbons with high specific surface area (SSA) and high nitrogen content is presented. Low molecular weight polyacrylonitrile (PAN) is solubilized in water in the presence of ZnCl2 that also acts as a volatile porogen during PAN pyrolysis to form mesoporous structures with significantly increased SSA. By templating with commercial SiO2 nanoparticles, nanocellulose fillers or filter paper, nanocarbons with SSA = 1776, 1366, and 1501 m(2)/g, respectively and 10 wt % N content were prepared...
September 11, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28876350/interfacial-crowding-of-nanoplatelets-in-co-continuous-polymer-blends-assembly-elasticity-and-structure-of-the-interfacial-nanoparticle-network
#5
R Altobelli, M Salzano de Luna, G Filippone
The sequence of events which leads to the interfacial crowding of plate-like nanoparticles in co-continuous polymer blends is investigated through a combination of morphological and rheological analyses. Very low amounts (∼0.2 vol%) of organo-modified clay are sufficient to suppress phase coarsening in a co-continuous polystyrene/poly(methyl methacrylate) blend, while lower particle loading allows for a tuning of the characteristic size of the polymer phases at the μm-scale. In any case, an interfacial network of nanoparticles eventually forms, which is driven by the preferred polymer-polymer interface...
September 6, 2017: Soft Matter
https://www.readbyqxmd.com/read/28875509/a-newly-designed-composite-gel-polymer-electrolyte-based-on-poly-vinylidene-fluoride-hexafluoropropylene-pvdf-hfp-for-enhanced-solid-state-lithium-sulfur-batteries
#6
Yan Xia, Xiuli Wang, Xinhui Xia, Ruochen Xu, Shengzhao Zhang, Jianbo Wu, Yanfei Liang, Changdong Gu, Jiangping Tu
Developing high-performance solid-state electrolyte is crucial for innovation of next-generation lithium-sulfur batteries. Herein, we report a facile method for preparation of a novel gel polymer electrolyte (GPE) based on poly(vinylidene fluoride-hexafluoropropylene) (PVDF-HFP). Furthermore, Li1.5Al0.5Ti1.5(PO4)3 (LATP) nanoparticles as the active filler are uniformly embedded into the GPE to form the final PVDF-HFP/LATP composite gel polymer electrolyte (CPE). Impressively, the obtained CPE demonstrates a high lithium ion transference number of 0...
September 5, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28866180/fabrication-of-high-performance-poly-l-lactic-acid-lignin-graft-poly-d-lactic-acid-stereocomplex-films
#7
Rui Liu, Lin Dai, Li-Qiu Hu, Wen-Qin Zhou, Chuan-Ling Si
The need for green renewable alternatives such as lignin to traditional fillers has driven recent interest in polylactic acid blend materials. Herein, lignin-graft-polylactic acid copolymers (LG-g-PDLA, LG-g-PDLLA, and LG-g-PLLA) have been synthesized via ring-opening polymerization of d-, dl-, and l-lactic acid. Then poly(l-lactic acid)/lignin-graft-polylactic acid (PLLA/LG-g-PDLA, /LG-g-PDLLA, and /LG-g-PLLA) complex films have been prepared. The results showed that, compared with LG-g-PDLA and LG-g-PLLA, a small amount of LG-g-PDLA addition could improve the crystallization rate, reduce the glass transition temperature and cold crystallization temperature of PLLA due to the stereocomplex crystallites...
November 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28866150/synthesis-and-study-of-thermal-mechanical-and-biodegradation-properties-of-chitosan-g-pmma-with-chicken-egg-shell-nano-cao-as-a-novel-bio-filler
#8
Arun K Pradhan, Prafulla K Sahoo
The important objective of this study is to evaluate the effect of chicken eggshell (nano-Cao) as a functionalized bio-filler on the mechanical strength and thermal stability of acrylic based bionanocomposite of chitosan grafted with poly(methyl methacrylate)(PMMA). The chitosan grafted PMMA adsorbed with functionalized biofiller was prepared via emulsion polymerisation technique and physicochemically characterized as bone graft substitute. The so prepared grafted bioactive bone cement (BBC) bionanocomposite (BNC), chitosan-g-PMMA/nano-CaO was characterized by FTIR, XRD, FESEM and TGA...
November 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28858926/a-prospective-open-label-study-of-hyaluronic-acid-based-filler-with-lidocaine-vyc-15l-treatment-for-the-correction-of-infraorbital-skin-depressions
#9
Francois Niforos, Raj Acquilla, Patricia Ogilvie, Marva Safa, Massimo Signorini, Lela Creutz, Graeme Kerson, Michael Silberberg
BACKGROUND: Infraorbital skin depressions are one of the most troublesome facial areas for aesthetically aware patients. OBJECTIVE: Evaluate effectiveness and safety of Juvéderm Volbella with Lidocaine (VYC-15L; Allergan plc, Dublin, Ireland) for correction of bilateral infraorbital depressions. METHODS: In this 12-month, prospective, uncontrolled, open-label study, subjects aged ≥18 years with infraorbital depressions rated ≥1 on the Allergan Infra-oRbital Scale (AIRS) received injections of VYC-15L with optional touch-up treatment on Day 14...
August 30, 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/28841189/enhancing-the-ignition-hardness-and-compressive-response-of-magnesium-by-reinforcing-with-hollow-glass-microballoons
#10
Vyasaraj Manakari, Gururaj Parande, Mrityunjay Doddamani, Manoj Gupta
Magnesium (Mg)/glass microballoons (GMB) metal matrix syntactic foams (1.47-1.67 g/cc) were synthesized using a disintegrated melt deposition (DMD) processing route. Such syntactic foams are of great interest to the scientific community as potential candidate materials for the ever-changing demands in automotive, aerospace, and marine sectors. The synthesized composites were evaluated for their microstructural, thermal, and compressive properties. Results showed that microhardness and the dimensional stability of pure Mg increased with increasing GMB content...
August 25, 2017: Materials
https://www.readbyqxmd.com/read/28803246/biofunctional-ionic-doped-calcium-phosphates-silk-fibroin-composites-for-bone-tissue-engineering-scaffolding
#11
S Pina, R F Canadas, G Jiménez, M Perán, J A Marchal, R L Reis, J M Oliveira
The treatment and regeneration of bone defects caused by traumatism or diseases have not been completely addressed by current therapies. Lately, advanced tools and technologies have been successfully developed for bone tissue regeneration. Functional scaffolding materials such as biopolymers and bioresorbable fillers have gained particular attention, owing to their ability to promote cell adhesion, proliferation, and extracellular matrix production, which promote new bone growth. Here, we present novel biofunctional scaffolds for bone regeneration composed of silk fibroin (SF) and β-tricalcium phosphate (β-TCP) and incorporating Sr, Zn, and Mn, which were successfully developed using salt-leaching followed by a freeze-drying technique...
August 12, 2017: Cells, Tissues, Organs
https://www.readbyqxmd.com/read/28782936/sulfonated-copper-phthalocyanine-sulfonated-polysulfone-composite-membrane-for-ionic-polymer-actuators-with-high-power-density-and-fast-response-time
#12
Taehoon Kwon, Hyeongrae Cho, Jang-Woo Lee, Dirk Henkensmeier, Youngjong Kang, Chong Min Koo
Ionic polymer composite membranes based on sulfonated poly(arylene ether sulfone) (SPAES) and copper(II) phthalocyanine tetrasulfonic acid (CuPCSA) are assembled into bending ionic polymer actuators. CuPCSA is an organic filler with very high sulfonation degree (IEC = 4.5 mmol H(+)/g) that can be homogeneously dispersed on the molecular scale into the SPAES membrane, probably due to its good dispersibility in SPAES-containing solutions. SPAES/CuPCSA actuators exhibit larger ion conductivity (102 mS cm(-1)), tensile modulus (208 MPa), strength (101 MPa), and strain (1...
August 30, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28774110/electroconductive-composites-from-polystyrene-block-copolymers-and-cu-alumina-filler
#13
QuratulAin Nadeem, Tasneem Fatima, Pepijn Prinsen, Aziz Ur Rehman, Rohama Gill, Rashid Mahmood, Rafael Luque
Technological advancements and development of new materials may lead to the manufacture of sustainable energy-conducting devices used in the energy sector. This research attempts to fabricate novel electroconductive and mechanically stable nanocomposites via an electroless deposition (ELD) technique using electrically insulating materials. Metallic Cu is coated onto Al₂O₃ by ELD, and the prepared filler is then integrated (2-14 wt %) into a matrix of polystyrene-block-poly(ethylene-ran-butylene)-block-polystyrene-graft-maleic anhydride (PS-b-(PE-r-B)-b-PS-g-MA)...
December 7, 2016: Materials
https://www.readbyqxmd.com/read/28766936/polymeric-self-assembled-monolayers-anomalously-improve-thermal-transport-across-graphene-polymer-interfaces
#14
Lin Zhang, Ling Liu
Ultralow thermal conductivities of bulk polymers greatly limit their applications in areas demanding fast heat dissipation, such as flexible electronics and microelectronics. Therefore, polymeric composites incorporating highly thermally conductive filler materials (e.g., graphene and carbon nanotubes) have been produced to address the issue. However, despite some enhancement, thermal conductivities of these materials are still far below theoretical predictions, mainly due to the inefficient thermal transport across material interfaces...
August 30, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28749746/the-increasing-relevance-of-biofilms-in-common-dermatological-conditions
#15
G Kravvas, D Veitch, F Al-Niaimi
BACKGROUND: Biofilms are diverse groups of microorganisms encased in a self-produced matrix that offers protection against unfavourable conditions and antibiotics. METHODS: We performed a literature search using the MEDLINE electronic database. Only original articles published in English were considered for review. RESULTS: Biofilms have been implicated in the pathogenesis of acne, eczema, hidradenitis suppurativa, onychomycosis, miliaria, and impetigo...
July 27, 2017: Journal of Dermatological Treatment
https://www.readbyqxmd.com/read/28737792/ferromagnetic-resonance-of-nicofe2o4-nanoparticles-and-microwave-absorption-properties-of-flexible-nicofe2o4-carbon-black-poly-vinyl-alcohol-composites
#16
Gopal Datt, Chetan Kotabage, A C Abhyankar
The effect of cationic disorder and particle morphology on the ferromagnetic resonance (FMR) of NiCoFe2O4 nanoparticles (NPs) and the electromagnetic shielding effectiveness of flexible composites (wherein the nanoparticles are used as fillers) has been presented. Upon annealing at 1000 °C, spherical, ∼25 nm, single crystalline (as-prepared) NPs are transformed into octahedral, ∼200 nm, polycrystalline (annealed) NPs and change the cationic distribution significantly. The effect of shape, size and cationic distribution on the resonance properties has been discussed using the randomly-oriented anisotropic-axis model...
August 9, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28736287/novel-approach-for-selective-reduction-of-nnn-in-cigarette-tobacco-filler-and-mainstream-smoke
#17
M Lusso, I Gunduz, A Kondylis, G Jaccard, L Ruffieux, F Gadani, K Lion, A Adams, W Morris, T Danielson, U Warek, J Strickland
Research conducted during past decades to reduce the level of the tobacco specific nitrosamine N-nitrosonornicotine (NNN) and its precursor nornicotine in tobacco yielded identification of three tobacco genes encoding for cytochrome P450 nicotine demethylases converting nicotine to nornicotine. We carried out trials to investigate the effect of using tobaccos containing three non-functional nicotine demethylase genes on the selective reduction of NNN in cigarette tobacco filler and mainstream smoke. Our results indicate that the presence of non-functional alleles of the three genes reduces the level of nornicotine and NNN in Burley tobacco by 70% compared to the level observed in currently available low converter (LC) Burley tobacco varieties...
July 20, 2017: Regulatory Toxicology and Pharmacology: RTP
https://www.readbyqxmd.com/read/28723068/biomimetic-hybridization-of-kevlar-into-silk-fibroin-nanofibrous-strategy-for-improved-mechanic-properties-of-flexible-composites-and-filtration-membranes
#18
Lili Lv, Xiangsheng Han, Lu Zong, Mingjie Li, Jun You, Xiaochen Wu, Chaoxu Li
Silk, one of the strongest natural biopolymers, was hybridized with Kevlar, one of the strongest synthetic polymers, through a biomimetic nanofibrous strategy. Regenerated silk materials have outstanding properties in transparency, biocompatibility, biodegradability and sustainability, and promising applications as diverse as in pharmaceutics, electronics, photonic devices and membranes. To compete with super mechanic properties of their natural counterpart, regenerated silk materials have been hybridized with inorganic fillers such as graphene and carbon nanotubes, but frequently lose essential mechanic flexibility...
August 22, 2017: ACS Nano
https://www.readbyqxmd.com/read/28718482/molecular-insight-into-the-mullins-effect-irreversible-disentanglement-of-polymer-chains-revealed-by-molecular-dynamics-simulations
#19
Chi Ma, Tuo Ji, Christopher G Robertson, R Rajeshbabu, Jiahua Zhu, Yalin Dong
The debate regarding the possible molecular origins of the Mullins effect has been ongoing since its discovery. Molecular dynamics (MD) simulations were carried out to elucidate the underlying mechanism of the Mullins effect. For the first time, the key characteristics associated with the Mullins effect, including (a) the majority of stress softening occurring in the first stretch, (b) continuous softening with stress increase, (c) a permanent set, and (d) recovery with heat treatment, are captured by molecular modeling...
July 26, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28708378/synthesis-of-highly-conductive-uniformly-silver-coated-carbon-nanofibers-by-electroless-deposition
#20
Xavier Cauchy, Jolanta-Ewa Klemberg-Sapieha, Daniel Therriault
Noble-metal-coated carbon-based nanoparticles, when used as electrically conductive fillers, have the potential to provide excellent conductivity without the high weight and cost normally associated with metals such as silver and gold. To this effect, many attempts were made to deposit uniform metallic layers on core nanoparticles with an emphasis on silver for its high conductivity. The results so far were disheartening with the metal morphology being better described as a decoration than a coating with small effects on the electrical conductivity of the bulk particles...
August 30, 2017: ACS Applied Materials & Interfaces
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