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 an amorphous material and a continuous phase, and a second polymer which forms a dispersed phase, and having an index of refraction that differs from said continuous phase by greater than about 0.05 along a first axis and by less than about 0.05 along a second axis orthogonal to said first axis, 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 and stretch ratio for the process and Tg, and refractive index of the first and second polymers are selected to satisfy the equations: R 1 d is greater than R 1 s ; T 2 t / 1 - 0.5 R 1 t + R 2 t > 1.35.

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 provides an injection molding machine and an injection screw thereof. The screw thread part of the injection screw comprises a feeding section, a compressing section and a homogenizing section; the homogenizing section is formed by large-pitch spiral grooves and spiral wave crests; and a gap between the spiral wave crests and the inner wall of a charging barrel is small, and when a motor drives the screw to rotate to plastify raw materials, all sol needs to cross the gap to obtain suitable cutting. The plastified sol enters the large-pitch spiral grooves and is conveyed into the material storage space of the charging barrel at relatively small damping and high efficiency. When the sol enters the deeper spiral grooves after crossing the spiral wave crests, eddy currents are formed to generate scroll currents along the depth of the spiral grooves; uniform chaotic mixing is conducted on the plastified sol, and heat exchange between the sol and the charging barrel is conducted more fully; and a uniform-temperature sol body with high quality is generated. According to the injection molding machine and the injection screw thereof, the material is fully plastified at smaller cutting displacement and higher plastifying efficiency. The defects of uncontrolled temperature rising, slipping of the screw, slow feeding and the like which are prone to occur in the sol melting process are overcome.

The invention provides a method for preparing gold nanoclusters based on a microfluidic chip, and belongs to the field of gold nanocluster synthesis methods. The method is based on the microfluidic chip synthesis of gold nanoclusters with small monodisperse particle size protected by a single layer of alkyl carbon chain thiol. By hydrophobically modifying the inner wall of the chip channel, the droplet generation is stable and smooth, and the droplet fusion is accurate. , the droplet size is uniform; at the same time, the method of the present invention has small droplet volume, fast mass transfer speed of chaotic mixing, and uniform distribution of reactants in the channel, which is conducive to the nucleation and growth of nanoparticles; the microfluidic chip of the present invention adopts transparent PDMS material can be integrated with a microscope to monitor and control the formation of the material in real time online. The chip design is simple, and it is easy to construct multiple sets of parallel reaction channels for high-throughput synthesis and increase product yield.

The invention discloses an assembly sequence planning method, which can be divided into three stages: stage I: collection of assembly information and establishment of fitness function; stage II: search for assembly sequence by using chaotic hybrid algorithm; stage III: calculation of fitness value, dynamic Update the size of the population and update the path pheromone. The present invention adds the chaotic algorithm on the basis of the ant genetic algorithm, introduces the chaotic algorithm search after the ant algorithm search, strengthens the local search capability of the algorithm, and uses the feasible solutions searched by these two algorithms as the initial population of the genetic algorithm, and guides Genetic Algorithm Global Search. Because the initial population is enriched, the global search ability of the genetic algorithm is strengthened, and the search space is expanded.

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.