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1 – 10 of 424Nilamadhab Kar, Surendra P. Singh, Tongeji E. Tungaraza, Susmit Roy, Maxine O'Brien, Debbie Cooper and Shishir Regmi
In many UK mental health services, in-patient psychiatric care is being separated from community care by having dedicated in-patient medical team. We evaluated staff satisfaction…
Abstract
In many UK mental health services, in-patient psychiatric care is being separated from community care by having dedicated in-patient medical team. We evaluated staff satisfaction in this functionalised in-patient care. A survey was conducted amongst multidiscipli-nary staff from various teams using a questionnaire survey. On an average 14.3% of staff returned a satisfactory response for function-alisation, 57.3% had unsatisfactory response and others were undecided or perceived no change. There was no difference in responses amongst age, gender and professional groups. Mean scores of all groups were within unsatisfactory domain; however community staff compared to in-patient staff and staff with more than 5 years of experience compared to those with 1-5 years of experience returned significantly more unsatisfactory responses regarding functionalisation. Many positive and negative aspects of functionalisation were raised. The results of this evaluation suggest the need for further studies on the effectiveness of in-patient functionalisation. Short and long term clinical outcomes and the satisfaction of the patients should also be studied.
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Goksel Saracoglu, Ferhat Ceritbinmez, Vildan Özkan and Ahmet Yapici
This study aims to systematically compare the effect of increasing fiber–matrix interface adhesion and matrix toughness in layered composite materials.
Abstract
Purpose
This study aims to systematically compare the effect of increasing fiber–matrix interface adhesion and matrix toughness in layered composite materials.
Design/methodology/approach
Silane ((3-glycidyloxypropyl) trimethoxysilane) was applied to strengthen the fiber–matrix interface connection in e-glass/epoxy laminated composite material. Using a cationic surfactant, 0.1% multi-walled carbon nanotubes (CNTs) were added to the matrix in two different ways, by with and without chemical functionalization using the vacuum infusion method.
Findings
In the results obtained from the three-point bending test specimens, it was determined that the synergistic effect of silane application and non-functionalized CNT in the matrix was higher in terms of flexural modulus and strength values.
Practical implications
The functionalization of multi-walled CNT did not give the expected results because of reasons such as viscosity increase and agglomeration in the matrix.
Originality/value
In this study, a simple model for normalization and prediction purposes was developed, which allows the determination of the flexural modulus and un-notched flexural strength values from one test result of the notched specimen. A systematic comparison was performed by varying each parameter in the composite material.
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Tuba Çakır Çanak, Ömer Faruk Vurur and İ. Ersin Serhatlı
This paper aims to investigate effects of acrylic functionalisation of multiwalled carbon nanotubes (MWCNTs) on properties of carbon nanotubes/epoxy nanocomposites.
Abstract
Purpose
This paper aims to investigate effects of acrylic functionalisation of multiwalled carbon nanotubes (MWCNTs) on properties of carbon nanotubes/epoxy nanocomposites.
Design/methodology/approach
A number of analytical techniques, including Fourier transform infrared spectroscopy, Raman spectroscopy, scanning electron microscopy and transmission electron microscopy, were used to assess the effects of acid treatment on MWCNTs. Ultraviolet-curable coatings were fabricated by sonication and cast moulding process. The mechanical properties of MWCNTs/epoxy composites at different weight fractions were evaluated by performing tensile tests and dynamic mechanical analysis tests. Also, gel contents were examined.
Findings
It was found that addition of nanotubes monomer to epoxy formulations had significant effect on the viscoelastic and mechanical properties.
Practical implications
Improving dispersion and alignment of MWCNTs in the composite matrix will contribute to the development of resin/MWCNTs nanocomposites and promote the applications.
Originality/value
The paper establishes a method to introduce MWCNTs into epoxy matrix as a monomer to enhance the photo curable and dispersion properties of the MWCNT/epoxy films.
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K. Bukat, J. Sitek, M. Kościelski, M. Jakubowska, M. Słoma, A. Młożniak and W. Niedźwiedź
The purpose of this paper is to study the manufacturing of SAC 305 solder paste with multiwall carbon nanotubes (MWCNT) before and after structure modification and also to…
Abstract
Purpose
The purpose of this paper is to study the manufacturing of SAC 305 solder paste with multiwall carbon nanotubes (MWCNT) before and after structure modification and also to investigate the added carbon nanotubes' influence on the technological properties and the microstructure of “nano” solder pastes. This work is a continuation of similar previous studies of SAC solder pastes with silver nanopowder additions.
Design/methodology/approach
The authors applied functionalization and esterification methods for the structural modification of the carbon nanotubes. The “nano” solder paste preparation was performed with the use of a two‐stage method of carbon nanotube dispersion in “own‐manufactured” SAC 305 solder paste. To determine the technological properties of the “nano” solder paste, slump, solder ball, wetting and spreading tests were applied according to the existing standards. Standard metallographic procedures were applied for microstructural analysis.
Findings
As expected on the basis of the previous studies of SAC solder pastes with silver nanopowders, positive results were obtained for the own‐manufactured SAC 305 solder paste with carbon nanotubes by applying the dispersion method. Also applied were functionalization and esterification methods, whose results showed microstructural changes in the carbon nanotubes. The “nano” SAC solder pastes showed a positive influence on the slump properties, compared to the basic SAC solder paste. The authors proved a negative influence of the carbon nanotubes' addition (dependent on their concentration) on the spreading and wetting of the SAC solder paste on a copper substrate, which provoked the non‐wetting and dewetting phenomena. A slight improvement was observed for the “nano” SAC solder pastes with modified carbon nanotubes. The carbon nanotubes' presence in the solder paste showed a positive effect on the growth reduction of the IMCs' thickness, which depended on the type.
Research limitations/implications
The authors intend to verify the reinforcement effect of the alloys with carbon nanotubes suggested in the literature (the aim of Part II). For this purpose, an assembly process with RC electronic elements on PCBs with Ni/Au and SAC (HASL) finishes will be performed, with the use of the SAC 305 solder paste with modified carbon nanotubes, for the purpose of reflow soldering. Next, measurements of the mechanical strength of the solder joints and their microstructures will be conducted.
Practical implications
It is suggested that further studies of the mechanical properties and the reliability of solder joints are necessary for the practical implementation of the “nano” SAC solder pastes, but taking into account the wetting data, the investigation should be performed only for “nano” pastes with the lowest additions of modified carbon nanotubes.
Originality/value
The paper demonstrates a method of “nano” solder paste preparation by means of a two‐stage dispersion of carbon nanotubes in the own‐manufactured SAC 305 solder paste and a comparison study of the properties of “nano” pastes with the basic SAC solder paste.
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K. M. Faridul Hasan, Haona Wang, Sakil Mahmud, Ashraful Islam, Md. Ahsan Habib and Cao Genyang
Functionalization of organic cotton fabrics (OCFs) by in situ deposition of chitosan reduced-stabilized silver nanoparticles (AgNPs). No other toxic chemicals used to warrant an…
Abstract
Purpose
Functionalization of organic cotton fabrics (OCFs) by in situ deposition of chitosan reduced-stabilized silver nanoparticles (AgNPs). No other toxic chemicals used to warrant an ecofriendly synthesis protocol. Human toxicity of silver systematically avoided to use as textile clothing. Primary colors (nearly-red, yellow and blue) were imparted on OCFs via localized surface plasmon resonance (LSPR) of AgNPs. Decent mechanical properties and laundering durability in terms of antibacterial/fastness test improved mechanical properties.
Design/methodology/approach
Silver nanoparticles can be synthesized by using silver nitrate along with commercially available chitosan. Due to the surface LSPR property of silver nanoparticles, it exhibits versatile colors depending on the synthesizing procedures. The coloration occurs due to the electrostatic interaction between the AgNPs and chitosan-treated OCF. The nanotreated fabrics provide excellent mechanical properties with improved antibacterial effects.
Findings
X-ray fluorescence (XRF) analysis quantifies the developed materials in the substrates. Scanning electron microscopy (SEM) characterization indicates the appearance and morphologies of silver nanoparticles into the fabric surface after the coloration process. It proves that the treated cotton knit fabric exhibits the LSPR optical features of AgNPs. The antibacterial and mechanical properties confirm the improved functionality of products.
Originality/value
Improved mechanical properties, antibacterial performances and coloration effects on organic cotton substrates in terms of chitosan-mediated nanosilver are not yet studied.
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Peter Skarzynski, Dave Crosswhite and Chris Jones
The authors believe that too many large organizations mistakenly see innovation as a capability challenge that can be addressed through the development and allocation of resources…
Abstract
Purpose
The authors believe that too many large organizations mistakenly see innovation as a capability challenge that can be addressed through the development and allocation of resources when the real problem is a lack of strategic direction and alignment resulting from insufficient involvement of C-Suite leaders. This paper aims to address this issue.
Design/methodology/approach
First the authors explain the downside of seeing innovation primarily as a resources challenge. They trace the growth of functionalization, which they warn can make the innovation process capable of only incremental achievements. Then they show how to promote C-suite participation in the innovation process.
Findings
Leading innovation performers understand that there are two critical “responsibilities” that only C-suite executives can accomplish: enabling cross-boundary cooperation; and granting the permissions needed to pursue longer-term or other higher risk opportunities.
Originality/value
The authors explain how successful companies foster C-suite participation in breakthrough innovation by a variety of approaches, including: conducting regular C-level portfolio reviews; identifying strategic focus areas for innovation exploration; using active C-level sponsorship of larger innovation opportunities; and creating separate incubators for developing breakthrough opportunities.
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Grazielle de Oliveira Setti, Marcelo Fernandes de Oliveira, Izaque Alves Maia, Jorge Vicente Lopes da Silva and Ednan Joanni
This paper aims to demonstrate the functionalization of polyamide parts made by selective laser sintering (SLS) for application as substrates for chemical analysis by…
Abstract
Purpose
This paper aims to demonstrate the functionalization of polyamide parts made by selective laser sintering (SLS) for application as substrates for chemical analysis by surface-enhanced Raman scattering (SERS).
Design/methodology/approach
Fabrication of Nylon 12 (Duraform PA®) samples using two laser power levels and deposition of a layer of gold-coated zinc oxide nanostructures. Performance of these substrates in the detection of a known compound was tested by Raman spectroscopy.
Findings
The hydrothermal synthesis proved to be a good method for functionalizing the surface of polyamide parts made by the SLS process. By varying the synthesis temperature, ZnO nanoparticles and nanorods attached to the sample surfaces could be obtained. The degree of sample sintering had an effect on the growth of the nanostructures. The gold-coated functionalized surfaces enhanced the Raman signal from crystal violet by more than three orders of magnitude. ZnO nanorods grown on well-sintered SLS parts showed the best performance from the set of samples tested in this work.
Originality/value
ZnO nanostructures were grown directly on untreated surfaces of SLS-made polyamide. These substrates were used for chemical analysis by SERS.
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Ziyan Wang, Xueli Yang, Caixuan Sun, Hongyan Liu, Junkai Shao, Mengjie Wang, Junyi Dong, Guanlong Cao and Guofeng Pan
This paper aims to successfully synthesize three-dimensional spindle-like Au functionalized Co3O4-ZnO nanocomposites; characterize the structure, morphology and surface chemical…
Abstract
Purpose
This paper aims to successfully synthesize three-dimensional spindle-like Au functionalized Co3O4-ZnO nanocomposites; characterize the structure, morphology and surface chemical properties of the products; study the effect of Au NPs doping concentration, operating temperature different gas to, sensing properties; and introduce an attractive gas sensor for acetone detection.
Design/methodology/approach
Au NPs functionalized Co3O4-ZnO nanocomposite was prepared by coprecipitation and impregnation methods; the structure and surface chemical property of the products were characterized by XRD, SEM, TEM, UV-Vis, BET and XPS. The sensing ability of Au@Co3O4-ZnO for acetone and mechanism was analyzed systematically.
Findings
The results of gas sensing tests show that the unique component structure, Schottky junction and catalytic effect of Au functionalization make it have low operating temperature, excellent selectivity, high response (10 ppm, 56) and rapid response recovery time.
Research limitations/implications
All the characterization and test data of the prepared materials are provided in this paper and reveals the gas sensing mechanism of the gas sensor.
Practical implications
The detection limit is 2.92–100 ppb acetone. It is promising to be applied in low-power, micro detection and miniature acetone gas sensors.
Social implications
The gas sensor prepared has a lower working temperature and low detection limit, so it has promising application prospects in low-concentration acetone detection and early warning.
Originality/value
The unique component structure, Schottky junction and catalytic effect of Au functionalization Co3O4-ZnO make it have low operating temperature, excellent selectivity and rapid response recovery time.
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Hung Ngoc Phan, Huong Mai Bui and Nguyen Khanh Vu
Bacterial cellulose (BC) is an ideal alternative filtering material. However, current functionalization approaches for BC have not been fully discovered industrially as well as…
Abstract
Purpose
Bacterial cellulose (BC) is an ideal alternative filtering material. However, current functionalization approaches for BC have not been fully discovered industrially as well as academically applying textile processing. This study aims to create a sustainable fabric-like membrane made of BC/activated carbon (AC) for applications in filtration using textile padding method, to protect people from respiratory pandemics.
Design/methodology/approach
Fabric-like BC is first mechanically dehydrated then AC is loaded via a textile padding step. The finishing efficacy, properties of fabric-like BC/AC and NaOH pretreatment are analyzed and characterized by scanning electron microscope (SEM), field emission scanning electron microscope (FE SEM), X-ray diffraction (XRD), CIELab color space, color strength (K/S), nitrogen adsorption-desorption isotherm including Brunauer–Emmett–Teller (BET) specific surface area and Barrett–Joyner–Halenda (BJH) pore size and volume.
Findings
This research results in a fabric-like BC/AC with pore diameters of 3.407 ± 0.310 nm, specific surface area of 115.28 m2/g and an efficient scalable padding process, which uses 8 times less amount of chemical and nearly 30 times shorter treating duration than conventional methods.
Practical implications
Our globe is now consuming an alarming amount of non-degradable disposable masks resulting in massive trash buildup as a future environmental problem. Besides, current disposable masks requiring a significant upfront technological investment have posed challenges in human protection from respiratory diseases, especially for countries with limited conditions. By combining a sustainable material (BC) with popular padding method of textile industry, the fabric-like BC/AC will offer sustainable and practical values for both humankind and nature.
Originality/value
This research has offered an effective padding process to functionalize BC, and a unique fabric-like BC/AC membrane for filtration applications.
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