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KR-20260064674-A - Method for manufacturing WCOF marine bio-composite using nanofiber orientation control based on electromagnetic-acoustic composite fields

KR20260064674AKR 20260064674 AKR20260064674 AKR 20260064674AKR-20260064674-A

Abstract

The present invention relates to a method for manufacturing a WCOF marine biocomposite using nanofiber orientation control based on an electromagnetic-acoustic combined field. The present invention comprises the steps of: preparing a hybrid bio-ink mixed with seaweed-derived cellulose nanofibrils (CNF), photoelectric conversion nanoparticles, and a magnetic derivative; generating a real-time closed-loop control signal based on path data of a robot arm and measurement values of an optical anisotropy sensor using an AI feedback computation unit; inducing fluidity and preliminary orientation of the ink through laminar flow formation and high-frequency acoustic cavitation phenomena of a triple helix induction unit; aligning nanoparticles in real-time in the tangential direction of the stacking path through an electromagnetic ring of an extrusion nozzle unit; and physically engraving the aligned structure simultaneously with discharge through laser photopolymerization. According to the present invention, by utilizing an AI-controlled electromagnetic-acoustic complex physical field to maximize the anisotropy of nanomaterials, it is possible to precisely manufacture an intelligent marine bio-composite structure equipped with both high mechanical strength and energy harvesting capabilities.

Inventors

  • 이두걸

Assignees

  • 주식회사 민사

Dates

Publication Date
20260507
Application Date
20260420

Claims (5)

  1. A step (S100) of preparing a hybrid bio-ink composition comprising seaweed-derived cellulose nanofibrils (CNF), photoelectric conversion nanoparticles, magnetic derivatives, and ionic additives; A step (S200) in which an AI feedback computation unit of an integrated 3D additive manufacturing system receives coordinate information and tool path data of a robot arm, measures the orientation state of a hybrid bio-ink composition ejected from an optical anisotropy sensor in real time, and generates a closed-loop control signal; Based on the above control signal, a step (S300) of securing the fluidity of nanoparticles inside the bio-ink composition and inducing preliminary orientation through a triple helix inductor and a high-frequency acoustic cavitation chamber within the hybrid extrusion head unit; A step (S400) of variably controlling a composite field applied through a high-density electromagnetic ring and dynamic electromagnetic-acoustic coupling at the nozzle portion of the extrusion head unit to align nanoparticles inside the hybrid bio-ink composition in real time in the tangential direction of the stacking path; and A method for manufacturing a marine biocomposite using nanofiber orientation control based on an electromagnetic-acoustic composite field, comprising the step (S500) of physically fixing an aligned nanostructure by simultaneously discharging and curing the phase of a hybrid bio-ink composition through a laser photopolymerization means equipped in an inline rapid phase transition and curing unit.
  2. In Article 1, The above triple helix induction unit is, It includes three helical guide blades arranged at 120-degree intervals along the inner wall of the above-mentioned hybrid extrusion head unit, and The helix angle of the helical guide blade is formed within a range of 15 to 45 degrees with respect to the ink ejection direction, and by applying torque to the ink composition, pre-shear orientation is induced in the cellulose nanofibril (CNF), and In the above liquidity securing step (S300), A method for manufacturing a marine biocomposite using nanofiber orientation control based on an electromagnetic-acoustic composite field, characterized by controlling the pressure within the hybrid extrusion head in response to the viscosity and discharge speed of the ink calculated by the AI feedback computation unit, thereby maintaining the Reynolds number of the ink passing through the triple helix induction section in a laminar flow state of 2,000 or less, and suppressing irregular vortex diffusion of nanoparticles.
  3. In Article 1, The above-mentioned high-frequency acoustic cavitation chamber is, Ultrasonic frequencies in the range of 20 kHz to 100 kHz are applied to the above hybrid bio-ink composition to form microcavities (cavitation bubbles) inside the ink, and In the above liquidity securing step (S300), By utilizing shock waves generated during the adiabatic compression and collapse of the above microcavities, the agglomerates of cellulose nanofibrils (CNF) within the ink are physically defibrillated, and residual microbubbles within the ink are removed by float separation, thereby minimizing pressure variation during ejection. The above AI feedback computation unit is, A method for manufacturing a marine biocomposite using nanofiber orientation control based on an electromagnetic-acoustic composite field, characterized in that the amplitude of the acoustic actuator is variably controlled in proportion to the change in viscosity of the hybrid bio-ink based on the particle dispersion in the ink measured by the optical anisotropy sensor.
  4. In Article 1, The above AI feedback computation unit is, It includes a deep learning-based regression model that takes the orientation degree and distribution density data of nanoparticles collected from the optical anisotropy sensor as input values and the intensity of the electromagnetic field and the ultrasonic frequency as output values, In the above closed-loop control signal generation step (S200), A method for manufacturing a marine biocomposite using nanofiber orientation control based on an electromagnetic-acoustic composite field, characterized by calculating the error between the target orientation and the measured orientation in the current stacking path through the deep learning model, and updating control parameters to minimize the error by varying the current of the electromagnetic ring and the amplitude of the acoustic actuator in increments of 0.01 to 0.1 seconds when the error exceeds a threshold.
  5. In Article 1, The above optical anisotropic sensor is, A light source unit that irradiates a visible light wavelength in the range of 400 nm to 700 nm onto the hybrid bio-ink discharged from the nozzle unit; and It includes a detector that analyzes the polarization state of light transmitted or reflected by the ink; In the above real-time measurement step (S200), The amount of polarization displacement caused by birefringence or dichroism occurring when light irradiated from the above light source passes through aligned cellulose nanofibrils (CNF) and magnetic inducers is measured, and A method for manufacturing a marine biocomposite using nanofiber orientation control based on an electromagnetic-acoustic composite field, characterized by comparing the measured polarization displacement amount with preset reference data to calculate an orientation degree defined as a numeric value between 0 (random arrangement) and 1 (complete alignment).

Description

Method for manufacturing WCOF marine bio-composite using nanofiber orientation control based on electromagnetic-acoustic composite fields The present invention relates to a technology for controlling the anisotropy of nanomaterials using an electromagnetic-acoustic combined field, and more specifically, to a method for manufacturing a marine bio-composite structure with maximized mechanical strength and photoelectric conversion properties by controlling the alignment of nanoparticles within the material in real time by applying a combined electromagnetic field and an acoustic energy field during a 3D printing additive manufacturing process. Recently, research on marine biomass materials to replace terrestrial resources is actively underway to achieve carbon neutrality. In particular, cellulose nanofibrils (CNF) extracted from seaweed are attracting attention as next-generation eco-friendly construction and energy materials due to their excellent mechanical strength and biodegradability. In this regard, Korean Registered Patent No. 2230457 (Reference 1) proposed a technology that enhances heat resistance and impact resistance by glassing the surface of cellulose nanofibers with a silica precursor to increase dispersibility within a polymer matrix and suppress thermal oxidation occurring during high-temperature processes. In addition, registered patent No. 2823129 (Literature 2) and related prior art disclosed therein have focused on research on mixing highly crystalline CNF derived from seaweed with wood pulp or natural polymers to reinforce simple tensile strength or utilize it as an eco-friendly adhesive. However, conventional composite manufacturing methods, including those described in the aforementioned literature 1 and 2, are limited to the stage of simply dispersing nanomaterials within a polymer, making it difficult to utilize the theoretical strength and electrical properties of the nanomaterials. In other words, simple mixing methods result in particles being arranged in a disordered manner, leading to problems such as reduced load-bearing capacity in specific directions or reduced energy transfer efficiency. Furthermore, if chemical treatments such as silica coating or silane coupling agents are applied to ensure the dispersibility and heat resistance of nanomaterials, the use of organic solvents and multi-stage washing and drying processes are required, which increases manufacturing costs and may compromise the eco-friendly value of the material as a carbon-neutral component. In addition, conventional technology is mainly optimized for the injection of films or small parts, so it does not take into account the fluidity changes and nozzle clogging that occur when printing large building components through 3D printing nozzles, as well as the problem of real-time orientation control of nanoparticles according to the stacking path. Therefore, there is a need to develop manufacturing technology for marine biomass composite structures suitable for manufacturing large structures. FIG. 1 is a conceptual diagram of an integrated 3D stacking system for a method of manufacturing a marine biocomposite using nanofiber orientation control based on an electromagnetic-acoustic composite field according to the present invention. FIG. 2 is a flowchart showing the process of manufacturing a marine biocomposite using the integrated 3D stacking system illustrated in FIG. 1. FIG. 3 is a drawing showing one embodiment of a hybrid extrusion head structure, which is a key component of the present invention. FIG. 4 is a diagram schematically illustrating one embodiment of the triple helix induction section in FIG. 3 (a) and a diagram comparing the laminar flow forming structure according thereto (b). FIG. 5 is a diagram illustrating the process of aligning nanoparticles by the hybrid extrusion head shown in FIG. 3. FIG. 6 is a drawing showing the formation of a wall structure using a method for manufacturing a marine biocomposite using nanoparticle orientation control based on an electromagnetic-acoustic composite field according to the present invention. Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In assigning reference numerals to the components of each drawing, the same components are denoted by the same reference numeral whenever possible, even if they are shown in different drawings. Furthermore, in the description of the embodiments, if it is determined that a detailed description of related known configurations or functions would hinder understanding of the embodiments of the present invention, such description may be simplified or omitted. Where it is stated in this specification that a component is “equipped” or “coupled” to another component, this should be understood to include not only direct connections but also active coupling structures that exchange control signals or physical energy through another intermediate component. The pre