Effect of plasma treatment (He/CH4) on glass surface for the reduction of powder flux adhesion in the spray drying process

Ramlan, Nadiah; Zamri, Nazirah Wahidah Mohd; Maskat, Mohamad Yusof; Chin, O. H.; Theng, Lau Yen; Zubairi, Saiful Irwan

doi:10.1063/1.5028008

Cited by 5 publications

(4 citation statements)

References 28 publications

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“…To measure the change in intensity of the substrate surface spectrum, the Fourier Transform Infrared (FTIR) Spectrometer (Perkin Elmer model 1600 coupled with Attenuated Total Reflectance (ATR): PIKE Technologies, Madison, WI, USA) was used in the range of 4000 to 550 cm -1 . The exiting rays were gathered by sensors and the infrared spectrum was produced by the FTIR spectrometer [28].…”

Section: Surface Characterization By Ft-ir Spectroscopymentioning

confidence: 99%

“…The gradually changes of WCA from 118 o (untreated PTFE) to 116.3 o and 108.8 o at 5 minutes and 1 minute of exposure respectively might be due to the hydrophobic recovery process (reorientation of functional groups) which is related to a decrease/increase in the value of surface free energy (SFE). The hydrophobic recovery mechanism depends on the processing, materials, and enthalpy-related factors such as precursor type, type of substrate, treatment conditions and aging micro-environment [30,31]. A good sustainability of its superhydrophobic condition is one of the main concerns of maintaining the efficacy of the spray drying recovery (yield) throughout the process as it would be a cost-effective procedure for food manufacturing industry.…”

Section: Water Contact Angle (Wca) Profilesmentioning

confidence: 99%

“…In fact, prolonged exposure produced a dynamic evolution of its micro-topography. Most of the glass surface, the presence of functional groups (non-polar) prevents the entry of water molecules in the polar bonds, thus contributing to the enhancement of its hydrophobic properties [39][40][41][42]. Based on Figure 6 profiles, PTFE surfaces contained up to 3.3% oxygen (before undergo oxygen plasma treatment), but this concentration decreases after exposure until zero detection of oxygen in the chamber occurred.…”

Section: Surface Morphology By Scanning Electron Microscopy (Sem) And...mentioning

confidence: 99%

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Surface Characterization of Polytetrafluoroethylene (PTFE) Substrate after Oxygenated Plasma Treatment towards Potential Food Processing Application

Abidin¹,

Hashim²,

Zubairi³

2022

Preprint

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The spray drying process causes the buildup of an unspecified and unique pattern of wall deposits on the wall. The powder recovery of fruit juice by spray dryer is associated with stickiness problems because of the nature of food which contains low molecular weight sugars and organic acids, which have a low glass transition temperature (Tg). The surface properties of oxygen plasma treated-PTFE substrate were evaluated by using the different parameters of Plasma Enhanced Chemical Vapour Deposition (PECVD) prior to spray drying analysis. In this study, the fabrication method of nearly perfect superhydrophobic surfaces through plasma treatment with oxygen gas was generated and utilized. The plasma-treated PTFE were deposited from a fixed flow rate of oxygen gas with 30 cm3/min by varying the deposition time from 1 to 15 minutes to induce the hydrophobic surface of the PTFE substrate. The characterization techniques used to determine the morphology and chemical bonding of the substrate are field emission scanning electron microscopy (FESEM) and Fourier transform infrared spectroscopy (FTIR), respectively. The hydrophobicity of the glass samples was determined by the water droplet contact angle. Sample prepared at radio frequency (RF) power of 90W for 15 minutes duration of treatment time showed porous and spongy like microstructure which correlates with the best performance of a good contact angle which creates the superhydrophobicity regime (171o). Surface morphology analysis using scanning electron microscopy (SEM) showed changes in its roughness in the surface-treated glass substrate. The success of this method produced a huge potential for solving most of the food processing issues which relate to biofouling (e.g., powder stickiness) that would otherwise struggle to improve high productivity and recovery.

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Section: Surface Characterization By Ft-ir Spectroscopymentioning

confidence: 99%

Section: Water Contact Angle (Wca) Profilesmentioning

confidence: 99%

Section: Surface Morphology By Scanning Electron Microscopy (Sem) And...mentioning

confidence: 99%

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Surface Characterization of Polytetrafluoroethylene (PTFE) Substrate after Oxygenated Plasma Treatment towards Potential Food Processing Application

Abidin¹,

Hashim²,

Zubairi³

2022

Preprint

Self Cite

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“…Physicochemical analysis was done on both fresh and contaminated milk. Analyses that were done in this study were Brix, colour, pH and contact angle (Ramlan et al 2018(Ramlan et al , 2017. Brix analysis was done by using Master refractometer (Master -53a, Japan).…”

Section: Physicochemical Analysismentioning

confidence: 99%

Rapid Microbial Detection Model System in UHT Milk Products using Poly(L-Lactic Acid) (PLLA) Thin Film

Yusof

Sani²,

Anuar³

et al. 2018

JSM

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Ultra-high temperature is a process that involves heating of milk to a very high temperature to produce sterile milk products. However, food poisoning due to consumption of UHT milk still happen in Malaysia. This study was done to develop a film that is made by poly(L-lactic acid) (PLLA) to detect the presence of microorganisms in UHT milk products. UHT milk that was used in this study was full cream milk. Contaminated milk that contained Bacillus cereus was made to conduct a model system on the relationship between colony forming unit of microorganisms and contact angle. Contaminated milk was also used as a control sample to study the difference of milk properties between fresh and contaminated milk. Physicochemical analysis (Brix, colour, pH and contact angle) and microbiological analysis (total plate count) were done to UHT milk sample as soon as the packaging of the milk was unsealed. Analysis was done with 30 min time interval until 4 h and 30 min since the unsealing of packaging. The results showed that presence of microorganisms in UHT milk was detected after the milk product was unsealed and exposed to environment for 3 h and 30 min. Contact angle resulted from the presence of microorganisms in UHT milk was 64.34-65.44° with its colony forming unit, 2.1-3.9 cfu/mL. Therefore, the potential usage of contact angle on PLLA thin film with respect to colony forming unit (cfu) in detecting the presence of microorganisms in UHT milk product was attained and well modelled.

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Dehydration of hawthorn fruit juices using ultrasound-assisted vacuum drying

Wang

Wan

2020

Ultrasonics Sonochemistry

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Effect of plasma treatment (He/CH4) on glass surface for the reduction of powder flux adhesion in the spray drying process

Cited by 5 publications

References 28 publications

Surface Characterization of Polytetrafluoroethylene (PTFE) Substrate after Oxygenated Plasma Treatment towards Potential Food Processing Application

Surface Characterization of Polytetrafluoroethylene (PTFE) Substrate after Oxygenated Plasma Treatment towards Potential Food Processing Application

Rapid Microbial Detection Model System in UHT Milk Products using Poly(L-Lactic Acid) (PLLA) Thin Film

Dehydration of hawthorn fruit juices using ultrasound-assisted vacuum drying

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