Abstract: The present invention provides a microchannel heat sink with plural microchannels, each having a respective inlet and outlet to permit flow, in particular two-phase flow, of a working fluid. The plural microchannels are arranged such that adjacent microchannels accommodate flow of working fluid in opposite directions and are thermally coupled to each other to enable heat exchange between the corresponding adjacent microchannels. In one aspect, a microchannel inlet is positioned at an angle (e.g., 90 degrees) with respect to its outlet. The plural microchannels define parallel longitudinal axes that are optionally arranged on the same plane and/or side-by-side in a single layer. Further, in one aspect, each microchannel cross-sectional area increases as the channel length progresses from an upstream end (e.g., adjacent to the inlet) to a downstream end (e.g., adjacent to the outlet) of the corresponding microchannel.

Abstract: An omni wheel, comprising a hub bracket (10) and roller components (20). Each roller component (20) comprises a first roller assembly (21) and a second roller assembly (22); the first roller assembly (21) comprises a roller bracket (211) and a first roller structure; the second roller assembly (22) comprises a second shaft (221) and a second roller structure, and the second shaft (221) comprises a second shaft body (2211) and a limiting portion (2212); and the second shaft body (2211) is connected and locked to a first connection structure (2111) to limit the second roller structure between the limiting portion (2212) and the first connection structure (2111). A moving device is further disclosed. The omni wheel can ensure that second rollers will not shake and oscillate during running of the omni wheel and thus reduce vibrations and noise of the omni wheel, improving the running stability.

Abstract: A process for producing a surfactant having two head groups and a single tail group per molecule, including steps of: producing a compound of Formula (1) from ethanol and carbon disulfide; producing a compound of Formula (2) from a carboxylic acid and bromine; producing a compound of Formula (3) from the compound of Formula (2) and methanol; producing a compound of Formula (4) from the compound of Formula (1) and the compound of Formula (3); and producing a compound of Formula (5) from the compound of Formula (4) by a direct oxidation process or by a peracid oxidation process. The surfactant produced by the process has lower critical micelle concentration and enables a lower surface tension of a liquid as compared with prior surfactants with two head groups per molecule, thereby enabling the amount of surfactant required and thus the cost to be substantially reduced.

Abstract: A process for producing a surfactant having two head groups and a single tail group per molecule, including steps of: producing a compound of Formula (1) from ethanol and carbon disulfide; producing a compound of Formula (2) from a carboxylic acid and bromine; producing a compound of Formula (3) from the compound of Formula (2) and methanol; producing a compound of Formula (4) from the compound of Formula (1) and the compound of Formula (3); and producing a compound of Formula (5) from the compound of Formula (4) by a direct oxidation process or by a peracid oxidation process. The surfactant produced by the process has lower critical micelle concentration and enables a lower surface tension of a liquid as compared with prior surfactants with two head groups per molecule, thereby enabling the amount of surfactant required and thus the cost to be substantially reduced.