Showing papers on "Amorphism published in 2007"
Patent•
10 Oct 2007
TL;DR: In this article, a vibrational ultrafine pulverizer is used to realize ultrafine pulpization of starch by high-frequency multi-dimensional vibration, and one or more metal materials are used as the grinding medium.
Abstract: This invention relates to a method for preparing modified starch. The method solves the problems of high energy consumption, long reaction time, low controllability, complex process, low efficiency and unstable quality faced by the present techniques. The method utilizes vibrational ultrafine pulverizer to realize ultrafine pulverization of starch by high-frequency multi-dimensional vibration. One or more metal materials are used as the grinding medium. The method changes the morphologies and sizes of starch particles, increases the specific surface area and porosity, transforms starch from pleomorphism into amorphism, and changes molecular weight distribution and linear chain/branched chain ratio. Modified starch has such advantages as low gelatinization temperature, high light transmittance, high freeze-thaw stability, high water absorbency and low viscosity.
4 citations
TL;DR: In this paper, a coal tar pitch-derived carbonaceous mesophase (CM) was treated in a high-energy ball mill apparatus, and the structures for the raw and the as-milled CMs were characterized by X-ray diffraction and laser-Raman spectroscopic techniques.
4 citations
Patent•
29 Aug 2007
TL;DR: In this article, a method to quickly detect polyethylene pipe material rank of ISO9080, which includes the following steps: (1) detect the pipe material structure distribution in condensation state, the structure distribution includes mass per centum content distribution of crystal phase, interface phase, and amorphism phase; (2) calculate the mass per percentum content distributions of crystal, interface, and Amorphism phases; and (3) base the result of the analysis on the ISO 9080 ratings of pipe material.
Abstract: The invention discloses a method to quickly detect polyethylene pipe material rank of ISO9080, it includes (1) detect polyethylene pipe material structure distribution in condensation state, the structure distribution in condensation state includes mass per centum content distribution of crystal phase, interface phase and amorphism phase;(2)compute the mass per centum content distribution of crystal phase, interface phase and amorphism phase;(3) bases the result of the (2)step, process the ISO9080 ratings of the polyethylene pipe material: the mass per centum content of crystal phase is 50-90%for polyethylene pipe material with PE80 rank and more than it, the mass per centum content of interface phase is 5-45%, the mass per centum content of amorphism phase is 0-15%. Compared to pipe certification authority hydrostatic test rating, This method has advantages of convenient, fast, and saving money, accelerate the new pipe material products into research development process, and with high accuracy, wide adaptation.
3 citations
1 Jan 2007
TL;DR: In this paper, the area under the prominent quartz peak was used to calculate the amorphism rate of the mechanically activated particles and the Scherer equation was employed to determine the crystallite size of the feed and mechanically activated particle.
Abstract: Mechanical activation of quartz was carried out in jet mill at various specific kinetic energy level and classifier speed. The characterization of the particle size, crystallite size, amorphism rate and lattice strain was conducted on the feed and mechanically activated particles. The area under the prominent quartz peak was used to calculate the amorphism rate of the mechanically activated particles. Scherer equation was used to determine the crystallite size of the feed and mechanically activated particles. Mean particle size less than 5μm was obtained when the specific kinetic energy is ranging between 500 kWh/ton and 1000 kWh/ton. Amorphism of the mechanically activated particles up to 18% was observed at 500 kWh/ton. The crystallite size and lattice strain is influence by the intensity of the specific kinetic energy and classifier speed. The reduction in the crystallite size up to 39% was observed where the minimum crystallite is 23nm. The lattice strain is ranging from 0.024 to 0.038 respective to the specific kinetic energy and classifier speed.