Physical and Thermal Properties of Zingiber officinale Rosc. (Ginger) Rhizome Fine Particle as a Function of Grinding System

2013 ◽  
Vol 832 ◽  
pp. 527-532 ◽  
Author(s):  
A. Norhidayah ◽  
A. Noriham ◽  
Mohamad Rusop
Keyword(s):  
Thermal Properties ◽  
Ball Mill ◽  
Zingiber Officinale ◽  
Milling Process ◽  
Planetary Ball Mill ◽  
Hammer Mill ◽  
Food Processor ◽  
Ginger Rhizome ◽  
Stretching Vibration ◽  
Ft Ir

In this study,Zingiber officinale(ginger) rhizome fine particles were prepared by using food processor, hammer mill and planetary ball mill and tested for their physical and thermal properties. The physical changes by means of particle size, surface morphology, FT-IR and thermal stability (TGA) were investigated. The size reduction method had a distinct effect on physical and thermal properties of ginger rhizome tested. Average particle size of ginger rhizome after using food processor and hammer mill was around 50µm and 20µm respectively while after using planetary ball mill the ginger rhizome was successfully reduced to nanoscale (222.3 nm). Higher degree of granule surface fractured was observed as a result of a planetary ball milling process based on FESEM images. There were also some notable differences of FT-IR spectra detected. By comparing the spectra, the stretching vibration peak of OH at 3292 cm-1[U1]and the symmetric stretching vibration peak of the NO2and C=C at 1369 – 1639.51cm-1 for ginger rhizome ground using food processor were disappeared. Yet, presence of possibly strong alkenes group (in the range 2850 – 2970cm-1) were observed in all samples tested. Ginger rhizome particles obtained from hammer milling process were found to be more stable to thermal effect where the decomposed temperature was 276.64°C as compared to samples milling using food processor and planetary ball mill. These results would provide useful insight for exploring the potential applications of ginger rhizome fine powder as functional food ingredient as well as in pharmaceutical applications. [U1]Check typing of superscript.

Changes in Physical and Antioxidant Properties of Nanostructured Zingiber officinale (Ginger) Rhizome as Affected by Milling Time

2013 ◽  
Vol 667 ◽  
pp. 144-149 ◽  
Author(s):  
A. Norhidayah ◽  
A. Noriham ◽  
Mohamad Rusop
Keyword(s):  
Milling Time ◽  
Antioxidant Properties ◽  
Zingiber Officinale ◽  
Milling Process ◽  
Total Phenolic ◽  
Antioxidant Power ◽  
Milled Sample ◽  
Ginger Rhizome ◽  
Ferric Reducing Antioxidant Power ◽  
Ic50 Concentration

In this study, Zingiber officinale (ginger) rhizome nanoparticles were prepared using a planetary ball milling process and the effect of prolong milling time up to 8 hours on the physical and antioxidant properties has been investigated. The particle size was successfully reduced to 222.3nm after 4 hours of milling process but agglomerated nanoparticles were observed for sample that was continuously milled. Sample milled for 4 hours showed higher Total Phenolic Content (TPC) (356.06 mgGAE/g extract) as well as Total Flavonoid Content (TFC) whereas lowest value shown by sample milled for 8 hours. The inhibition of DPPH reached up to 60% for all tested nanostructured ginger except very low percent of inhibitory shown by sample milled for 6 hours. The IC50 concentration for DPPH inhibition was 800ppm for sample milled for 2 hours, 400ppm for 4 hours and1000ppm for sample milled for 8 hours. However sample milled for 8 hours showed significantly (p<0.05) greater Ferric Reducing Antioxidant Power (FRAP) among other tested samples.

scholarly journals CO2 Utilization For Mechanochemical Carbonation Of Celestine

2015 ◽  
Vol 61 (3) ◽  
pp. 20-23 ◽  
Author(s):  
Erika Turianicova
Keyword(s):  
Infrared Spectroscopy ◽  
Ball Mill ◽  
High Energy ◽  
Planetary Ball Mill ◽  
Co2 Utilization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Characterization Techniques ◽  
One Step ◽  
Ft Ir

Abstract Natural celestine (SrSO4) has been succesfully transformed into strontianite (SrCO3) via fast one-step mechanochemical carbonation utilizing gaseous CO2. The process was realized in the environment enriched with LiOH or NaOH additives. The mixtures were milled in a high-energy planetary ball mill for 40 min. The phases formed during the milling were characterized by different characterization techniques, such as X-ray diffraction (XRD) and infrared spectroscopy (FT-IR). The presence or absence of carbon or sulphur in the products was confirmed by a CHNS analysis.

Synthesis and Thermal Properties of Etherified Konjac Glucomannan

2009 ◽  
Vol 620-622 ◽  
pp. 197-200 ◽  
Author(s):  
Qiang Wu ◽  
Xiao Yan Lin ◽  
Xue Gang Luo ◽  
Yan Chen
Keyword(s):  
Glass Transition ◽  
Thermal Properties ◽  
Transition Temperature ◽  
Decomposition Temperature ◽  
Konjac Glucomannan ◽  
Vibration Band ◽  
Hydrophobic Polymer ◽  
Stretching Vibration ◽  
Ft Ir ◽  
Dsc Thermograms

A novel etherified KGM (EKGM) was synthesized with Konjac glucomannan (KGM) and 1-bromopropane in Lithium chloride/dimethyl sulfoxide (LiCl/DMSO). The EKGM was characterized by FT-IR, DSC and TG. The IR of EKGM showed that –OH stretching vibration band decreased and the C–H and C–O–C stretching vibration bands increased comparing with the unmodified KGM, which was indicating that KGM had been etherified. The DSC thermograms showed that an obvious glass transition of EKGM appeared and its glass transition temperature (Tg) decreased with the increasing of Pr/OH ratio. And it was also found that the EKGM had a higher decomposition temperature than unmodified. Meanwhile, it was proved that the EKGM was a good hydrophobic polymer and dissolved in some organic solvent easily.

Study on Preparation of Mullite Powder Using Fly Ash by Mechanochemical Method

2013 ◽  
Vol 318 ◽  
pp. 326-330
Author(s):  
Lei Zhang ◽  
Qun Yu Chen ◽  
Ding Gao
Keyword(s):  
Fly Ash ◽  
Ball Mill ◽  
Structural Changes ◽  
Planetary Ball Mill ◽  
Mechanochemical Method ◽  
Signal Phase ◽  
Direct Formation ◽  
Ft Ir ◽  
Mullite Powder ◽  
Grinding Time

This paper studies the structural changes of the mixture of fly ash and A12O3 grinded by planetary ball mill . By investigating the structure of the ground product by SEM, XRD and FT-IR, the mechanism of mullite formation is discussed. The crystal structure of the mixture was destroyed by the grinding of planetary ball mill, and with the grinding time increases, the specific surface area of the mixture increases as well. And this leads to the decrease of bond energy, the increase of the internal energy and the decrease of the activation energy. After this process,uniform mixture and direct formation of signal phase mullite can be obtained from the mixture grinded for 30 hours and calcined at 1150°C for 2 hours and the temperature for mixture ungrinded needs to reach 1450°C.

scholarly journals The Preparation, Thermal Properties, and Fire Property of a Phosphorus-Containing Flame-Retardant Styrene Copolymer

Materials ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 127 ◽  
Author(s):  
Yu Sun ◽  
Yazhen Wang ◽  
Li Liu ◽  
Tianyuan Xiao
Keyword(s):  
Thermal Properties ◽  
Thermogravimetric Analysis ◽  
Flame Retardant ◽  
Oxygen Index ◽  
Limiting Oxygen Index ◽  
Chemical Structures ◽  
1H Nuclear Magnetic Resonance ◽  
Phosphorus Containing ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

A 9,10-dihydro-9-oxa-10-phosphaphenanthrene 10-oxide (DOPO) acrylate, (6-oxidodibenzo [c,e][1,2] oxaphosphinin-6-yl) methyl acrylate (DOPOAA), has been prepared. Copolymers of styrene (St) and DOPOAA were prepared by emulsion polymerization. The chemical structures of copolymers containing levels of DOPOAA were verified using Fourier transform infrared (FT-IR) spectroscopy and 1H nuclear magnetic resonance (1H-NMR) spectroscopy. The thermal properties and flame-retardant behaviors of DOPO-containing monomers and copolymers were observed using thermogravimetric analysis and micro calorimetry tests. From thermogravimetric analysis (TGA), it was found out that the T5% for decomposition of the copolymer was lower than that of polystyrene (PS), but the residue at 700 °C was higher than that of PS. The results from micro calorimetry (MCC) tests indicated that the rate for the heat release of the copolymer combustion was lower than that for PS. The limiting oxygen index (LOI) for combustion of the copolymer rose with increasing levels of DOPOAA. These data indicate that copolymerization of the phosphorus-containing flame-retardant monomer, DOPOAA, into a PS segment can effectively improve the thermal stability and flame retardancy of the copolymer.

Fast, solvent-free and highly enantioselective fluorination of β-keto esters catalyzed by chiral copper complexes in a ball mill

2017 ◽  
Vol 19 (7) ◽  
pp. 1674-1677 ◽  
Author(s):  
Yifeng Wang ◽  
Haojiang Wang ◽  
Yidong Jiang ◽  
Cheng Zhang ◽  
Juanjuan Shao ◽  
...  
Keyword(s):  
Ball Mill ◽  
Copper Complexes ◽  
Solvent Free ◽  
Planetary Ball Mill ◽  
Keto Esters ◽  
Solvent Free Conditions

A fast and highly enantioselective fluorination of β-keto esters catalyzed by diphenylamine linked bis(oxazoline)-Cu(OTf)2 complexes under solvent-free conditions has been developed using a planetary ball mill.

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