37 results about "Porous system" patented technology

The ability to design and construct solid-state materials with pre-determined structures is a grand challenge in chemistry. An inventive strategy based on reticulating metal ions and organic carboxylate links into extended networks has been advanced to a point that has allowed the design of porous structures in which pore size and functionality can be varied systematically. MOF-5, a prototype of a new class of porous materials and one that is constructed from octahedral Zn—O—C clusters and benzene links, was used to demonstrate that its 3-D porous system can be functionalized with the organic groups, —Br, —NH2, —OC3H7, —OC5H11, —H4C2, and —H4C4, and its pore size expanded with the long molecular struts biphenyl, tetrahydropyrene, pyrene, and terphenyl. The ability to direct the formation of the octahedral clusters in the presence of a desired carboxylate link is an essential feature of this strategy, which resulted in the design of an isoreticular (having the same framework topology) series of sixteen well-defined materials whose crystals have open space representing up to 91.1% of the crystal volume, and homogeneous periodic pores that can be incrementally varied from 3.8 to 28.8 angstroms. Unlike the unpredictable nature of zeolite and other molecular sieve syntheses, the deliberate control exercised at the molecular level in the design of these crystals is expected to have tremendous implications on materials properties and future technologies. Indeed, data indicate that members of this series represent the first monocrystalline mesoporous organic / inorganic frameworks, and exhibit the highest capacity for methane storage (155 cm3 / cm3 at 36 atm) and the lowest densities (0.41 to 0.21 g / cm3) attained to date for any crystalline material at room temperature.

The invention relates to a multiwell system, characterized that said multiwell system having at least 3 wells, wherein said wells have a volume between 0.125 and 4.0 mm3.

The invention discloses a method for determining the capillary radius distribution of a flexible porous system by mass classification. The method comprises the following steps of: firstly, preparing a sample plate used for determination, trimming the sample plate into a small test strip with the length of 30(+ / -)1cm and the width of 2.5(+ / -)0.1cm and arranging marks at equal intervals along the width direction from the lower end of the small test strip; secondly, washing and drying the small test strip and hanging the small test strip on a fabric hanging device to enable the lower end of the small test strip to just immerse into a liquid level; then, placing the small test strip and the fabric hanging device together into a constant temperature and constant humidity room and taking down the small test strip after standing for 47 to 49 hours; cutting off the small test strip along the marks; respectively weighing the obtained small test strips and processing data through a formula; andobtaining a fabric capillary radius distribution histogram according to a data processing result and further obtaining a curve distribution graph and an integrogram so that the corresponding relationof the cotton fabric warp and weft density and the capillary radius distribution can be analyzed and compared.

A method of fabricating porous carbon foam includes mixing equal masses of SiO2 particle dispersion with a chitosan solution, dropwise adding a glutaraldehyde aqueous solution into the mixture and solidifying it in air forming a room temperature hydrogel, lyophilizing the hydrogel to form a sponge-like SiO2-embedded aerogel, carbonizing in a furnace the aerogel to form a SiO2-embedded carbon foam, soaking the embedded carbon foam in NaOH to dissolve the SiO2 particles to form a carbon foam having carbon sheets with sub-micron cavities, immersing the carbon sheets in de-ionized water to remove any NaOH residuals followed by drying, placing the carbon foam in KOH solution followed by drying, annealing in nitrogen atmosphere the dried carbon foam to synthesize a carbon foam with a multi-dimensional porous system, immersing the synthesized carbon foam in de-ionized water to prevent self-burning in air, and rinsing the carbon foam in HCl and water, then oven drying.

The invention discloses a processing method of a power senary shunting rotary frame of a large-scale vertical mill reducer. A power senary shunting rotary frame with the porous system and parallel hole system processing accuracy standard of DIN3961 10a27 and the surface roughness of RaO.4 is adopted in the method. The method comprises the processes of rough finishing, heat treatment, multi-procedure semi-finishing, simultation processing, fine finishing and finishing. The method is a novel processing technology of a high precision porous system workpiece, which combines an ordinary machine tool with a precision numerical control machine, combines a traditional technological method with a new technological method, i.e. a computer simulation technology, combines an ordinary technological process with a special technological process, and has the advantages of less geometric tolerance, high processing accuracy, uniform planet hole distribution and low noise after assembly.