HKUST Institutional Repository
(5.016 recursos)
Repository of Hong Kong University of Science and Technology. Managed by the HKUST Library.
Mostrando recursos 1 - 13 de 13
1.
Stable polymer blends from a two-step crosslinking process - Wang, Zhi; Chan, Chi-Ming; Shen, Jiarui
The present invention provides a method for creating durable blends of polystyrene and polyolefin. The blends of the present invention have improved mechanical properties evidenced by measurement of impact strength, tensile strength, and elongation at break. Polyolefin is first crosslinked by creating a melt of polyolefin and a small amount of peroxide in a mixer at elevated temperature. The crosslinked polyolefin is then melt-blended with polystyrene at elevated temperature. Finally, a styrene-butadiene-styrene block copolymer is mixed into the melt. The method of the present invention can be applied to various blend systems of otherwise incompatible polymers provided it contains at...
2.
Method and apparatus for the control of injection molding - Gao, Furong; Zhao, Chunhua
This invention relates to a method and apparatus for the control of injection molding and, in particular, for determining a suitable time for transfer from injection velocity control to packing pressure control. The invention uses a derivative of , preferably the nozzle pressure, and inputs this to a fuzzy inference system. The fuzzy inference system uses said rules and knowledge to provide a suitable transfer time as an output. It is preferred that the sample pressure is filtered prior to calculation of the derivative.
3.
Method for preparing the oxysulfides of rare earth elements - Fang, Ming; Ma, Jian Xin; Lau, Ngai Ting
The present invention discloses a method for the catalytic reduction of sulfur dioxide, for example in flue gas, by carbon monoxide using lanthanum oxysulfide as the active catalyst. The catalyst is prepared from lanthanum oxide by hydration and sulfidization, the latter step being carried out in the gas stream itself. This method of preparation has more general applicability and can also be used as a method for the preparation of lanthanum, yttrium, gadolinium and lutetium oxysulfides generally.
4.
Bamboo fiber reinforced polypropylene composites - Mi, Yongli; Chen, Xiaoya; Cuo, Qipeng; Chan, Chi-Ming
There are disclosed novel composite materials in which polypropylene is reinforced by the inclusion of bamboo fibers. Preferably the polypropylene may be maleated prior to inclusion of the bamboo fibers in order to promote bonding between the bamboo fibers and the polypropylene matrix.
5.
Removal of arsenic from the industrial phosphorus by zone melting technique - Mi, Yongli (???); Li, Ning (??)
A novel zone melting method to purify industrial phosphorus is introduced. Since there is no chemical solvent for phosphorus, chemical extraction purification does not work for arsenic purification. Zone melting is a method for removing impurities from solid materials. This method with a special setup is now adopted in the purification of phosphorous and can reduce the arsenic concentration to below 100ppm.
Phosphorus is an essential element for living creatures. It particularly involves in energy production in muscle contractions. Therefore, addition of suitable amounts of phosphorus to food and forage has been suggested. However, industrial solid phosphorus contains too high arsenic...
6.
Methods for fabricating zeolite micromembranes - Chau, Joseph Lik Hang; Lam, Koon Fung; Heng, Samuel; Yeung, King-Lun
Zeolites are microporous crystalline aluminosilicate molecular sieve that have pore sizes ranging from about 0.3 to 1 mm. Due to their uniform, molecular-sized pores, they can separate molecules based on their size, shape and polarity. They can therefore act as ''molecular sieves''. Membranes made of zeolites and molecular sieve possess good thermal and chemical stabilty, and thus have a number of practical applications.
This inventionintroduces a new preparation method for zeolite and molecular sieve micromembranes with excellent mechanical, thermal and separation properties( gas-gas, gas-liquid, vapour-liquid, liquid-liquid, ion-transport), a new preparation method for three dimensionzeolite membrane enclosed microchannel structure. It also claims...
7.
TiO2 material and the coating methods thereof - Yeung, King-Lun; Yao, Nan
Conventional titanium dioxide (TiO2) coating is prone to scratches and is easy to delaminate through long time application, resulting in frequent needs for replacements. This is due to the fact that the TiO2 coating is often consisted of large aggregated particles with poor adhesion.
The present invention introduces a photocatalytic material that can convert VOC under ambient temperature. The nanostructured catalysts can be coated as an ultra-thin and scratching-proof layer. It can prevent the nanometer sized TiO2 particle from aggregation during coating. Thus, TiO2 scratching proof layer can be successfully prepared. The coating has a higher VOC degradation and germicidal properties...
8.
A novel TiO2 material and the coating methods thereor - Yeung, King-Lun; Yao, Nan
Conventional titanium dioxide (TiO2) coating is prone to scratches and is easy to delaminate through long time application, resulting in frequent needs for replacements. This is due to the fact that the TiO2 coating is often consisted of large aggregated particles with poor adhesion.
The present invention introduces a photocatalytic material that can convert VOC under ambient temperature. The nanostructured catalysts can be coated as an ultra-thin and scratching-proof layer. It can prevent the nanometer sized TiO2 particle from aggregation during coating. Thus, TiO2 scratching proof layer can be successfully prepared. The coating has a higher VOC degradation and germicidal properties...
9.
Health care product containing isoflavone aglycones and method of producing the same - Ng, Ka Ming; Luo, Qian; Zhang, Jingnan; Harjo, Benny
This invention relates to a novel soy isoflavone product with high purities and strong biological activities and the method of producing the same from natural soybeans, soybean materials (i.e. tofu dregs, soy molasses) and other plant sources. The method includes three steps consisting of extraction with an organic solvent, hydroysis using an acid and crystallization using an antisolvent. The procedure is very simple and thus can be easily adapted for large-scale manufacturing. Moreover, the procedure is able to produce a high yield of total isoflavones at a lower cost. HPLC analysis and E-Screen bioassay reveal that the obtained product not...
10.
催化材料及其製造方法 - Yeung, King-Lun (楊經倫); Yao, Nan (姚楠); Ho, Ka Yee (何嘉儀)
本發明提供包括與含有金屬氧化物的納米尺寸的晶體固定的金屬催化劑的催化材料。此外，本發明提供一種製造所述催化材料的方法。最後，本發明提供使用所述催化材料除去污染物並得到所霈產物的方法。
11.
Catalytic material and method of production thereof - Yeung, King-Lun; Yao, Nan; Ho, Ka Yee
The present invention features a catalytic material which includes a metal catalyst anchored to a nano-sized crystal containing a metal oxide. Furthermore, the present invention features a method of producing the catalytic material described herein. Finally, the present invention features using the catalytic material for removing contaminants and for getting the desired products.
12.
Purifying solid substance by zone heating and smelting and molecule spreading method and its device - Mi, Yongli; Li, Ning
The present invention relates to zone heating and smelting and molecular diffusion process to purify solid matter, such as yellow phosphorus via eliminating As. By means of zone heating and smelting and molecular diffusion, As content in yellow phosphorus is lowered while lowering the content of other impurities. In addition, no any pollution will be produced in the operation.
13.
Catalytic removal of sulfur dioxide from flue gas - Fang, Ming; Ma, Jian Xin; Lau, Ngai Ting
The present invention discloses a method for the catalytic reduction of sulfur dioxide, for example in flue gas, by carbon monoxide using lanthanum oxysulfide as the active catalyst. The catalyst is prepared from lanthanum oxide by hydration and sulfidization, the latter step being carried out in the gas stream itself. This method of preparation has more general applicability and can also be used as a method for the preparation of lanthanum, yttrium, gadolinium and lutetium oxysulfides generally.
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