powder surface
Recently Published Documents


TOTAL DOCUMENTS

153
(FIVE YEARS 19)

H-INDEX

18
(FIVE YEARS 3)

2022 ◽  
Vol 210 ◽  
pp. 114471
Author(s):  
Qiying Tao ◽  
Wangwang Ding ◽  
Gang Chen ◽  
Xuanhui Qu ◽  
Mingli Qin

Dairy ◽  
2021 ◽  
Vol 2 (4) ◽  
pp. 602-616
Author(s):  
Jacob R. Guralnick ◽  
Ram R. Panthi ◽  
Valeria L. Cenini ◽  
Vinay S. N. Mishra ◽  
Barry M. G. O'Hagan ◽  
...  

The rehydration properties of original whey protein isolate (WPIC) powder and spray-dried WPI prepared from either unheated (WPIUH) or nanoparticulated WPI solutions were investigated. Nanoparticulation of whey proteins was achieved by subjecting reconstituted WPIC solutions (10% protein, w/w, pH 7.0) to heat treatment at 90 °C for 30 s with no added calcium (WPIH) or with 2.5 mM added calcium (WPIHCa). Powder surface nanostructure and elemental composition were investigated using atomic force microscopy and X-ray photoelectron spectroscopy, followed by dynamic visualisation of wetting and dissolution characteristics using environmental scanning electron microscopy. The surface of powder particles for both WPIUH and WPIC samples generally appeared smooth, while WPIH and WPIHCa displayed micro-wrinkles with more significant deposition of nitrogen and calcium elements. WPIH and WPIHCa exhibited lower wettability and solubility performance than WPIUH and WPIC during microscopic observation. This study demonstrated that heat-induced aggregation of whey proteins, in the presence or absence of added calcium, before drying increases aggregate size, alters the powder surface properties, consequently impairing their wetting characteristics. This study also developed a fundamental understanding of WPI powder obtained from nanoparticulated whey proteins, which could be applied for the development of functional whey-based ingredients in food formulations, such as nanospacers to modulate protein–protein interactions in dairy concentrates.


Author(s):  
Youn-Seong Lee ◽  
Tae-Wook Kang ◽  
Sun-Woog Kim ◽  
Young-Jin Lee ◽  
Dong-Wook Shin ◽  
...  

2021 ◽  
Vol 290 ◽  
pp. 129429
Author(s):  
Randolph C.V. McGee ◽  
Ying She ◽  
Aaron Nardi ◽  
Daniel Goberman ◽  
Zissis Dardas

2020 ◽  
Vol 25 ◽  
pp. 101533
Author(s):  
Yanru Shao ◽  
Fang Yang ◽  
Qian Qin ◽  
Yang Zhou ◽  
Cunguang Chen ◽  
...  

Metals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1546
Author(s):  
Gunther Mohr ◽  
Susanna Nowakowski ◽  
Simon J. Altenburg ◽  
Christiane Maierhofer ◽  
Kai Hilgenberg

Recording the temperature distribution of the layer under construction during laser powder bed fusion (L-PBF) is of utmost interest for a deep process understanding as well as for quality assurance and in situ monitoring means. While having a notable number of thermal monitoring approaches in additive manufacturing (AM), attempts at temperature calibration and emissivity determination are relatively rare. This study aims for the experimental temperature adjustment of an off-axis infrared (IR) thermography setup used for in situ thermal data acquisition in L-PBF processes. The temperature adjustment was conducted by means of the so-called contact method using thermocouples at two different surface conditions and two different materials: AISI 316L L-PBF bulk surface, AISI 316L powder surface, and IN718 powder surface. The apparent emissivity values for the particular setup were determined. For the first time, also corrected, closer to real emissivity values of the bulk or powder surface condition are published. In the temperature region from approximately 150 °C to 580 °C, the corrected emissivity was determined in a range from 0.2 to 0.25 for a 316L L-PBF bulk surface, in a range from 0.37 to 0.45 for 316L powder layer, and in a range from 0.37 to 0.4 for IN718 powder layer.


Sign in / Sign up

Export Citation Format

Share Document