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Article
Publication date: 6 March 2017

Li Jun Ji, Ya Shuai Jiang, Ge Liang, Zhu Qing Liu, Jian Zhu, Kai Huang and Ai Ping Zhu

The purpose of this paper was to synthesise a thermally expandable microsphere (TEMS) with fast thermal response property and small expansion temperature range, and…

Abstract

Purpose

The purpose of this paper was to synthesise a thermally expandable microsphere (TEMS) with fast thermal response property and small expansion temperature range, and investigate the factors affecting the expansion properties of the microspheres.

Design/methodology/approach

A new kind of TEMS with fast thermal response property was synthesised by suspension polymerisation method, using acrylonitrile, ethyl methacrylate and methacrylic acid as the main monomers; Mg(OH)2 as the main dispersing agent; and isooctane or n-hexane or n-pentane as the blowing agent.

Findings

The TEMS possessed the best expansion capacity when encapsulated isooctane and n-hexane were about 18.5 Wt.%. The expansion process of the TEMS could be finished by raising the temperature to 18°C from the expansion onset, much less than the reported 30-50°C. The morphology of the TEMS turned from sphere to irregular concave shape following the content increase of the blowing agent.

Originality/value

A new kind of TEMS composed of acrylonitrile/ethyl methacrylate/methacrylic acid as the polymer shell was synthesised. These TEMS showed the fastest thermal response speed reported.

Details

Pigment & Resin Technology, vol. 46 no. 2
Type: Research Article
ISSN: 0369-9420

Keywords

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Article
Publication date: 21 November 2014

Abstract

Details

The Journal of Risk Finance, vol. 15 no. 5
Type: Research Article
ISSN: 1526-5943

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Article
Publication date: 1 November 2009

Ping Zhu, Chuanjie Zhang, Shuying Sui and Huaifang Wang

Alginate fiber with a breaking tenacity of up to 2.32 cN/dtex is prepared by spinning a sodium alginate solution in a coagulating solution of CaCl2 aqueous solution…

Abstract

Alginate fiber with a breaking tenacity of up to 2.32 cN/dtex is prepared by spinning a sodium alginate solution in a coagulating solution of CaCl2 aqueous solution followed by multi-roller drawing. Preparation parameters such as sodium alginate concentration, coagulant concentration and coagulation temperature, which affect the fiber tenacity, are investigated with an orthogonal test design, and the best spinning process is found with a coagulating 5% sodium alginate solution in 4% CaCl2 at 40°C. The morphology, degree of crystallinity, thermal stability and the combustion performance of this alginate fiber are investigated by scanning electron microscopy (SEM), infrared (IR), X-ray diffraction (XRD), Thermo gravimetric Analysis (TGA) and Cone Calorimeter. Using the centrifugal dewatering method, the absorption capacity of this alginate fiber is determined, and has a capacity of 13.01 grams of man-made blood per gram. The test results show that fibers have an irregular cross-section without a thicker cortex and uniform longitudinal surface with grooves. The combustion property results demonstrate that the fiber has a self-flameretarding property.

Details

Research Journal of Textile and Apparel, vol. 13 no. 4
Type: Research Article
ISSN: 1560-6074

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Article
Publication date: 1 August 2011

Chuanjie Zhang, Li Cui, Ping Zhu and Yun Liu

Glutaraldehyde is chosen as a novel non-formaldehyde durable press finish for cotton fabrics in this investigation. The optimum technique conditions and influences of…

Abstract

Glutaraldehyde is chosen as a novel non-formaldehyde durable press finish for cotton fabrics in this investigation. The optimum technique conditions and influences of glutaraldehyde concentration and catalysts, pH value, and curing conditions for the properties of the finished fabric have been investigated in detail. The finished fabric achieves the best performance with a pH value in the range of 4 to 4.5 for the glutaraldehyde finishing bath, magnesium chloride as the catalyst, and curing conditions of 160oC for 3 minutes. In addition, in contrast to low formaldehyde resin and non-formaldehyde finishers sold in the market, the wrinkle recovery angle of the fabric finished with glutaraldehyde is better than that finished with FREEREZ NFR (DHDMI), but not as satisfactory as that finished with FREEREZ 880 (low formaldehyde 2D). However, its strength is greater than the fabric finished with FREEREZ 880, but less so than that finished with FREEREZ NFR.

Details

Research Journal of Textile and Apparel, vol. 15 no. 3
Type: Research Article
ISSN: 1560-6074

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Article
Publication date: 17 May 2013

Ping Zhu, Liang You Wang, Guang Ren Qian, Tie Hua Cao and Ming Zhou

The purpose of this paper is to investigate the electrodeposition of copper coatings directly onto AZ31 magnesium alloy, considered as a substrate of electroplating…

Abstract

Purpose

The purpose of this paper is to investigate the electrodeposition of copper coatings directly onto AZ31 magnesium alloy, considered as a substrate of electroplating nickel. The additive, pH, complexing agent, current density, time, and temperature of electrolytic bath were studied to understand electrodepositing copper coating on AZ31 magnesium alloy.

Design/methodology/approach

Electrodeposition of copper was carried out in an aqueous solution containing copper hydroxide, citrate, and fluorine ion, which avoids the replacement or corrosion of the magnesium alloy. The morphology, structure, and interface of the electrodeposited copper coating were investigated by a scanning electron microscope (SEM).

Findings

The copper coating was dense, and there was good adhesion of the copper coating on the AZ31 magnesium alloy. This suggests that successful deposition of copper using an electroplating process could decrease the cost of coating AZ31 magnesium alloy.

Practical implications

This paper will be helpful for the development of coating on magnesium alloy using electroplating processes.

Originality/value

Copper hydroxide and citrate were the main compositions of the electrolyte, combined with sodium poly dipropyl (SP) and polyethylene glycol (PEG) as brightening agents and can be used to electrodeposit copper directly onto AZ31 magnesium alloy.

Details

Anti-Corrosion Methods and Materials, vol. 60 no. 3
Type: Research Article
ISSN: 0003-5599

Keywords

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Article
Publication date: 5 January 2015

Wang Qing-Cheng, Wu Zhao-Chun and Zhu Xiang-Ping

The purpose of this paper is to reveal the characteristics of the temperature field under different types of heat sources, which are significant to the temperature control…

Abstract

Purpose

The purpose of this paper is to reveal the characteristics of the temperature field under different types of heat sources, which are significant to the temperature control encountered in practical manufacturing processes.

Design/methodology/approach

The temperature fields in an infinite slab under line or plane heat source are calculated numerically by control volume approach and ADI scheme, and the numerical results of the temperature rise have been compared among the different types of the heat sources.

Findings

The numerical results show the different changing patterns of temperature fields under line and plane heat source, respectively, and demonstrate that the magnitude of temperature rise depends strongly on the type of the heat sources. The order of temperature rise from high to low is point, line and plane heat source base on the same input heat.

Originality/value

The study is original and findings are new, which demonstrate the different changing patterns of temperature fields and the magnitude of temperature rise under line and plane heat source. The numerical solution is significant for the temperature control in practical manufacturing processes.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 25 no. 1
Type: Research Article
ISSN: 0961-5539

Keywords

Content available
Article
Publication date: 13 July 2021

Francesc Fusté-Forné and Stanislav Ivanov

This research discusses the role of service robots in gastronomic and dining experiences in a post–coronavirus disease (COVID) world.

Abstract

Purpose

This research discusses the role of service robots in gastronomic and dining experiences in a post–coronavirus disease (COVID) world.

Design/methodology/approach

The research note draws on secondary data to analyse the use of robots as an important mechanism to address the impacts of global disease outbreaks on the food industry, as related to hospitality and tourism.

Findings

Hospitality and tourism services are highly affected by the current travel bans, lockdowns and health-related rules that have emerged to manage the current pandemic (COVID-19). This research showcases the role of service robots in food encounters in hospitality and tourism as agents that contribute to safe and innovative experiences.

Originality/value

This research note explores how the use of robots in tourism futures will not only transform food experiences, but it is also critical to sustainable development of communities and destinations in a future that will continuously have to deal with disease outbreaks and pandemics with continued travel mobilities.

Details

Journal of Tourism Futures, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 2055-5911

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Book part
Publication date: 22 August 2017

Ya-Ling Chen

This research examines the lodging experience in the context of environmentally friendly hotels by discovering the underlying guest segments. A mixed-method approach is…

Abstract

This research examines the lodging experience in the context of environmentally friendly hotels by discovering the underlying guest segments. A mixed-method approach is deployed, which first reveals three lodging experience dimensions entailing, functionality, hedonism and social responsibility via in-depth interviews. Subsequently, a questionnaire survey is conducted which gathers responses from 326 guests staying at seven certified green hotels. A cluster analysis based on green lodging experiences is performed that evokes three distinct guest segments labeled as (1) spontaneous guests, (2) active guests, and (3) devoted guests. The study notes that social responsibility is the most important lodging experience across the three resultant segments. The study also finds about 31% of respondents tend not to pay much attention to green lodging operations. It leads to a suggestion that the implementation of green operations may be accomplished in a way not notably compromising certain service expectations by those not profusely aspiring of the notion of green operations. Even though meeting the needs of core customers is a vital task.

Details

Advances in Hospitality and Leisure
Type: Book
ISBN: 978-1-78743-488-2

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Book part
Publication date: 15 March 2013

Abstract

Details

Teacher Reforms Around the World: Implementations and Outcomes
Type: Book
ISBN: 978-1-78190-654-5

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Article
Publication date: 1 July 2006

Zhu Peng, Wang Xiao, Wang Xiao‐dong, Huang Pei and Shi Jun

To provide some useful information on tribology performances of molybdenum disulfide (MoS2) reinforced thermoplastic polymide under dry and water lubrication conditions.

Abstract

Purpose

To provide some useful information on tribology performances of molybdenum disulfide (MoS2) reinforced thermoplastic polymide under dry and water lubrication conditions.

Design/methodology/approach

The effect of MoS2 content on composites' mechanical and tribological performances was investigated and worn morphologies, elements distribution and wear mechanisms under dry and water lubricant condition were also analyzed.

Findings

As a result, the composites' main mechanical performances decreased partly compared with pure PI and it became more stable with MoS2 content unceasingly increasing (up to 20 wt%). In the dry sliding condition, the friction coefficient decreased obviously by filling MoS2. The wear of composites which filled 10‐15 wt% MoS2 was less than other composites in which MoS2 content was below to 5 wt% or high than 20 wt%. It was found that materials wear happened mainly at initial stages of tribology test which the temperature was so high and the adhesive wear had a dominant place during the test process. While in the water lubrication condition, the composites tribological performances were improved evidently and MoS2 was still an effective lubricant and the fatigue wear was the main factor during the tribology process.

Originality/value

The paper analyzed the MoS2's effect on materials mechanical and tribological performances and divided the tribology process into two parts according to materials friction and wear.

Details

Industrial Lubrication and Tribology, vol. 58 no. 4
Type: Research Article
ISSN: 0036-8792

Keywords

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