33 results about "Chaotic mixing" patented technology

Microfluidic nucleic acid hybridization systems are described that include a first reaction chamber to hold an analyte solution comprising nucleic acids, and a first mixing channel in fluid communication with the chamber. The mixing channel includes a textured surface to mix the analyte solution. The systems may also include pump coupled to the mixing channel to circulate the analyte solution through the reaction chamber and the mixing channel, and an input port in fluid communication with the mixing channel and the reaction chamber to supply the analyte solution to the microfluidic system. The input port can be closed to create a closed circulation path for the analyte solution through the reaction chamber and the mixing channel.

The invention discloses a same-direction self-cleaned twin-screw extruder with baffle plates and a processing method thereof. A screw mechanism of the same-direction self-cleaned twin-screw extruder comprises a first screw rod and a second screw rod, wherein the first screw rod is in a single thread structure, and the second screw rod is in a double thread structure; the baffle plates are arranged in the screw grooves of the first screw rod, and the height of each baffle plate is less than the depth of each screw groove of the fist screw rod; 8-shaped hyperbolic flow disturbance can be formed at the baffle plates in the screw grooves of the first screw rod; and the first screw rod and the second screw rod rotate at the same speed, are meshed with each other at all times and are self-cleaned simultaneously. According to the processing method, the screw grooves are triggered under the action of 8-shaped hyperbolic flow disturbance formed due to the arrangement of the baffle plates to mix materials chaotically all the way, two flowing ways formed by the two screw rods fulfill the topological chaotic mixing function of dividing materials into two parts, mixing the two parts of materials and dividing the mixture into two parts, and the first screw rod and the second screw rod fulfill the functions of compressing, expanding, recompressing and reexpanding periodically. Under the joint action of three reinforced mixing mechanisms, the materials can be molten and mixed efficiently.

The present invention provides a method for manufacturing a diffusely reflecting polarizer, comprising the steps of: coextruding first and second polymers through a chaotic mixer and a sheeting die to produce a cast sheet with a desired blend morphology and stretching said cast sheet to produce a composite film containing a first polymer having a birefringence of less than 0.02, with said first polymer being a substantially amorphous nano-composite material, and a second polymer, the first polymer being a major phase, and the second polymer being a dispersed minor phase, wherein said first and second polymers taken together along a first axis for one polarization state of electromagnetic radiation exhibit a diffuse reflectivity R 1d , a specular reflectivity R 1s , a total reflectivity R 1t , a diffuse transmittance T 1d , a specular transmittance T 1s , and a total transmittance T 1t , and along a second axis for another polarization state of electromagnetic radiation exhibit a diffuse reflectivity R 2d , a specular reflectivity R 2s , a total reflectivity R 2t , a diffuse transmittance T 2d , a specular transmittance T 2s , and a total transmittance T 2t , the said first and second axes being orthogonal, wherein the parameters of composition, chaotic mixing, stretch temperature, stretch ratio for the process and Tg, and refractive index of the first and second polymers are selected to satisfy the equations: (1) R 1d is greater than R 1s ; and (2) T 2t / (1-0.5(R 1t +R 2t ))>1.35.

The invention discloses a method for preparing high polymer material scaffolds for the tissue engineering by collaboratively adopting mixing flow field and supercritical fluid. The method comprises the following steps: (1) two or more types of high polymer material are proportionally added into an extruder or an injection molding machine for melting; (2) the blend forms a continuous phase structure under the effect of mixing flow in a machine barrel (or under the combined action of the flow field and supercritical fluid which is injected); (3) the prepared blend with the continuous phase structure is foamed through supercritical fluid; and (4) the multi-component phase in foamed blend samples is removed, and less-component phase is remained as biological scaffolds. The method of the invention collaboratively adopts chaotic mixing and supercritical fluid to prepare the blend with the continuous phase structure in the condition that the less-component phase content is low, and enables the blend to be applied to the preparation of biological scaffolds for the tissue engineering. Moreover, the method has fewer processes, can realize batch production, and is easy to promote during the industrial production.