Amorphization of different cellulose samples by ball milling Article in Cellulose Chemistry and Technology 39(3):167-177 · May 2005 with 115 Reads How we measure 'reads'
Sep 01, 2013· The main objective of this work was investigate the effect of ball milling on microcrystalline cellulose (MCC) structure. FTIR results shows there are no obvious different in the function groups of between neat and ball milling MCC. Both FTIR and WAXD analysis indicate that the crystalline of MCC samples are change with the ball milling time.
Highlights We present the effect induced by a ball milling process on cellulose. The cellulose amorphization and the mean size reduction of the crystallite domains were quantified. Ball milled cellulose shows increased water absorption and reduced thermal stability. The disappearance of the fibrous structure is evidenced as a consequence of the ball milling process.
Amorphization of different cellulose samples by ball milling. Effect of ball-milling pretreatment on pyrolysis characteristics of cellulose was studied by thermogravimetric analysis (TGA) at four different heating rates; 5, 10, 20, and 40 K/min. Variation in Sales Online
Jan 17, 2019· The present work used 13 techniques to follow the changes in cotton fibers (nearly pure cellulose) after ball milling for 15, 45 and 120 min. X-ray diffraction results were analyzed with the Rietveld method; DNP (dynamic nuclear polarization) natural abundance 2D NMR studies in the next paper in this issue assisted with the interpretation of
partially damaged and the amorphization of cellulose progressed with milling time, leading to a DSC curves of MCC samples with different ball milling time. 3.6. Rheological Characterization.
This paper reports the possibility of producing cellulose nanofiber from softwood pulp using a simple ball milling technique under ambient pressure and at room temperature. The effects of milling conditions including the ball-to-cellulose mass ratio, milling time, ball size and alkaline pretreatment were investigated. It was found that milling-ball size should be carefully selected for
Feb 15, 2014· Read "The effect of ball milling and rehydration on powdered mixtures of hydrocolloids, Carbohydrate Polymers" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.
To investigate the effect of ball mill treatment of microcrystalline cellulose (MCC) on the rheological properties of MCC-polymer suspension, the structure and physicochemical characteristics of ground samples with different milling time and the rheological behaviors of MCC-starch suspensions were determined and comprehensively analyzed.
Solid-state amorphization of crystalline rebamipide (RBM) was realized by ball milling and spray drying. The amorphous content of samples milled for various time was quantified using X
Abstract: Ball-end milling of Cr12MoV die steel was studied using ceramic and cemented carbide inserts under different cutting conditions. The cutting forces, wear patterns and chip patterns generated using the different cutting tools at the different cutting conditions were investigated using a three component piezoelectric dynamometer and VHX-600E large depth-of-view 3-D scanner.
An early experiment with ball milling reduced the cotton sample to the amorphous state in 30 min (our similar ball milling system is slower) (Forziati et al. 1950). Subsequently, Segal et al. (1959) developed a crystallinity index (Fig. 1) to indicate the fraction of crystallinematerialinthesample.Thatpublicationhas
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The dilute acid (0.05 M H2SO4) hydrolysis at 175 °C of samples comprised of varying fractions of crystalline (α-form) and amorphous cellulose was studied. The amorphous content, based on XRD and CP/MAS NMR, and the product (glucose) yield, based on HPLC, increased by as much as a factor of 3 upon ball milling. These results are interpreted in terms of a model involving mechanical disruption
K. Aoki, A. Memezawa,and T. Masumoto: Atmosphere effects of th e amorphization reaction in NiZr by bal l milling 2 MPa) atmospheres. Structures of th e samples before and after milling were identified by means of x-ray diffractometry (XRD) using CuKa radiation with a
Different mill speeds 250, 375 and 500 rpms as three grinding speeds, 10, 20 and 30 hours as milling time and 5:1, 10:1 and 15:1 grinding balls to powder ball mill, the drum rotates about horizontal axis as shown in fig. 1. The size distribution of the milled samples in
May 15, 2012· The other drugs were also prepared in the same way, except that they were quenched over ice instead of liquid nitrogen. Subsequently, the samples were milled for 15 s in a small stainless steel vial with one steel ball bearing using a Wig-L-Bug
Jan 04, 2012· Read "A multitechnique approach to assess the effect of ball milling on cellulose, Carbohydrate Polymers" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.
periments. We expected two ball parameters to play a role in the process: the contact surface area of the ball with the jar (impact density), which depends on the ball size, and the mass of the ball, which impacts the kinetic energy delivered during milling. We thus ran two series of tests with balls of different
alongside a 10 mm stainless steel milling ball at room temperature and sealed properly. This combination was then subjected to 30 Hz milling in a Retsch MM400 grinder mill for varying times. After milling, the amorphous milling products were recovered and characterized. SI-2: Ball-milling Amorphization
creation of defects upon high-energy ball milling.2 Bakker, Zhou, and Yang have systematically studied the phase trans-formation in some intermetallic systems induced by ball milling.5 They found that the observed amorphization can be attributed to atomic disorder. Besides amorphization
AbstractA three-stage wood milling process was investigated leading to coarse, fine and amorphization of milled wood (MW) as a pretreatment for enzymatic wood hydrolysis. An eccentric vibratory tube mill (EVTM) and a spring suspended vibratory tube mill (SSVTM) were found to be suitable for wood cellulose amorphization. Both methods gave rise to highly digestible and amorphous wood powders
amorphous after 72 milling hours,10 and successively we have shown that under appropriate experimental conditions milling time can be further reduced (13 h).11 The method has then been applied to two more samples with different Co/B ratios in order to examine the influence of boron content on solid-state amorphization reactions.
Abstract: The (Ba 1-x Ca x)(Ti 0.92 Sn 0.08)O 3 (x = 0 and 0.02) lead-free ceramics were prepared by using different ball-milling method and time (common ball milling 24 h, high energy ball milling 1 and 3 h). The two-step sintering method was used for sintered the samples.
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Mechanochemical treatment offers great potential for environmentally sustainable processing of chitin within the context of biomass valorization. Using powder X-ray diffraction, we show that crystallinity can be reduced by 50% in 2 h in a controlled way using a ball mill. We correlate this crystallinity reduction with a decrease in interchain hydrogen bonding using infrared spectroscopy as a
A ball mill, a type of grinder, is a cylindrical device used in grinding (or mixing) materials like ores, chemicals, ceramic raw materials and paints.Ball mills rotate around a horizontal axis, partially filled with the material to be ground plus the grinding medium. Different materials are used as media, including ceramic balls, flint pebbles and stainless steel balls.
Various compositions as well as process parameters were used to obtain binary systems of the drug with the carrier. Thermal analysis and powder X-ray diffractometry confirmed amorphization of bicalutamide mechanically activated by ball milling and the decrease in crystallinity of
CiteSeerX Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Abstract. The amorphization process by mechanical alloying in the Fe-Si alloy system has been studied. High energy ball milling has been applied for alloys synthesis. X-ray diffraction (XRD), differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and transmission electron microscopy (TEM)
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