보고서 정보
주관연구기관 |
고려대학교 Korea University |
연구책임자 |
한창수
|
참여연구자 |
최병호
,
최원준
,
박정희
,
윤호규
,
이명규
,
우주연
,
김학성
,
김재현
,
박철민
,
박성진
|
보고서유형 | 1단계보고서 |
발행국가 | 대한민국 |
언어 |
한국어
|
발행년월 | 2017-03 |
과제시작연도 |
2016 |
주관부처 |
미래창조과학부 Ministry of Science, ICT and Future Planning |
등록번호 |
TRKO201800006047 |
과제고유번호 |
1711047871 |
사업명 |
미래소재디스커버리지원 |
DB 구축일자 |
2018-05-12
|
키워드 |
초경량.극한물성.프랙탈.하이브리드소재.계층구조.Ultralight weight.Extreme property.Fractal.Hybrid material.Hierarchy structure.
|
DOI |
https://doi.org/10.23000/TRKO201800006047 |
초록
▼
○ 본 先기획연구의 목적은 초경량 극한기계물성을 위한 수도프랙탈 하이브리드 소재 연구개발 방안을 도출하고, 향후 심층 연구개발단계의 연구목표, 범위, 내용 및 추진전략을 체계화하고 핵심기술별 특허포트폴리오 확보방안을 도출하는 것임.
○ 대상 기술은 동일한 성질의 재료가 아닌 상이한 (복합)재료들이 다중스케일을 구성하여 설계적 유연성 및 특정성능의 획기적으로 향상시켜 기존 소재 대비 동일 이상의 기계적 물성을 유지하면서 중량을 획기적으로 줄일 수 있을 것으로 예상됨.
○ 先기획연구에서는 과학적 연구기획 방법론을 적용하여 전
○ 본 先기획연구의 목적은 초경량 극한기계물성을 위한 수도프랙탈 하이브리드 소재 연구개발 방안을 도출하고, 향후 심층 연구개발단계의 연구목표, 범위, 내용 및 추진전략을 체계화하고 핵심기술별 특허포트폴리오 확보방안을 도출하는 것임.
○ 대상 기술은 동일한 성질의 재료가 아닌 상이한 (복합)재료들이 다중스케일을 구성하여 설계적 유연성 및 특정성능의 획기적으로 향상시켜 기존 소재 대비 동일 이상의 기계적 물성을 유지하면서 중량을 획기적으로 줄일 수 있을 것으로 예상됨.
○ 先기획연구에서는 과학적 연구기획 방법론을 적용하여 전략 연구개발 분야 도출을 위한 4개의 탐색연구를 수행하였으며, 11명의 기획위원이 총 9회의 기획회의를 실시하여, 전략과제 설정, 타당성 조사, 문헌특허 수집 및 분석, 연구개발 로드맵 및 원천특허 포트폴리오를 도출하였음.
○ 先기획연구 수행을 통해 12개의 특허포트폴리오를 도출하였으며, 수도프랙탈 하이브리드 소재개발의 구체적 연구목표 (예, 밀도 < 0.5 kg/m3, 강성 > 60 GPa, 비강도 > 0.3 MPa/Kg/m3, size > 10 x 10 x 3 (cm)) 및 추진체계를 포함하는 연구과제 계획 작성하였음.
(출처 : 보고서 요약서 3p)
Abstract
▼
Ⅳ. Research Results
A. Application for a concept patent of Pseudo-Fractal materials and writing a patent portfolio
⦁ To analyze patents, search for a large number of patents and papers based on the related search terms presented, and then use the method to gradually narrow down to fiel
Ⅳ. Research Results
A. Application for a concept patent of Pseudo-Fractal materials and writing a patent portfolio
⦁ To analyze patents, search for a large number of patents and papers based on the related search terms presented, and then use the method to gradually narrow down to fields related to this research.
⦁ Analyze key contents and the rights of core patents, analyze differences and similarities with the proposal, and establish strategies for blank / avoiding / defending patents based on this analysis.
⦁ Based on patents and papers, the contents of this proposal would be added or subtracted to secure technologies that can be technologies for core materials, and then, patents that can implement core source patents are derived.
B. Discovery of Pseudo-Fractal hybrid new material and establishment of the research methodology
⦁ The synthesis of High Entry Low Dim. Nanomaterials
- Based on the first principle and quantum computations, it is computationally predicted whether or not it is possible to fabricate various single and composite materials that are based on Light Elements, which can be synthesized from past to now, in various low-dimensional shapes.
- The proposed candidate substances are checked whether they are the Earth-Rich substances or not, then synthesis methods would be established.
- Synthesis methods for low-dimensional (lD, 2D) shape and specific shapes for lighter weight of tube, porous, shell etc can be considered additionally.
- We will confirm that these materials can be used as hard filler materials at the 0 level of existing Pseudo-Fractal composites.
⦁ A prediction of design and performances of high performance composite materials through biomimetics
- In this study, we have proposed a novel type of Pseudo-Fractal composites that were not previously available. This can be done by simulating characteristics of natural composites more systematically.
- To achieve this, we are going to develop a Library of combination experiment methods, and creat systematic rules for manufacturing new composite materials based on the library, and creat new composites.
- In addition, we have proposed a composite material that can improve several contradictory properties simultaneously by systematically reflecting the rules of unique superiorities of existing composites in the natural world.
- In particular, we will take a strategic form that can make various composite compositions by changing the Level of repetitive pattern similar with structural patterns which are repeated according to scale change.
⦁ Establishment of new concept design method for Pseudo-Fractal Structure
- In this project, we build a Library to realize high performance by using statistical data obtained from various samples in nature which have both light weight structure and excellent mechanical properties. and design a structure to achieve the required performance based on this.
- In particular, to realize a Pseudo-Fractal structure, it is possible to strategically combine each strong point of physical properties at multi scales to design the optimum structure for achieving the required performance.
- In addition, when the hierarchical structure has a Pseudo-Fractal structure, We have newly established an analytical technique that can ensure optimal structure and properties through simple Simulation of physical properties.
- We have established a computational scientific Simulation model method which simultaneously considers multiple mechanical properties such as not only the strength and stiffness which is previously considered but also the thermal properties and proposed an optimal Pseudo-Fractal structure that is ultra lightweight.
⦁ Development of hybrid manufacturing process technology for unit device and Macro Part fabrication
- We have established a process that enables the precise production of Multiscale for multicomponent materials by using new process based on Powder injection molding, 3D printing and Interferometer lithography.
- We attempted to solve the Trade off between manufacturing scale and precision by introducing the Modular assembly method which functionally Moduleized multi-scale structure from nanocomposite to bulk structure.
⦁ Property valuation in multiscale and interrelationship analysis of characteristic changes between different scales
- In order to measure multi-properties for nano-sized materials, we would like to utilize a multi-scale simultaneous measurement technique capable of measuring changes in small scale when measuring large scale.
- In addition to this, we are trying to construct measurement data to maximize multi-material properties together with ultra light weight by using various simultaneous multi-property measurement techniques.
C. Feasibility research results
⦁ (Feasibility study1) Derivation and synthesis of candidate substances based on first principles and quantum computation
- Materials consisted of small atmic elements are likely to be lightweight materialsnd we have tabulated the nanotube and nanosheet materials predicted through quantum mechanical calculations.
- Magnesium nanotubes were synthesized to maximize the mechanical properties and lighten weight.
- MgB2 nanosheets were fabricated based on Mg as a candidate for another ultra-lightweight material, and they were made into a single layer and multi-layers, so that they could be utilized in a Pseudo-Fractal composite material.
⦁ (Feasibility study2) Preliminary experiment of biomimicry based Pseudo-Fractal composites
- In order to imitate the Nacre structure, SiO2 and CaCO3 were mixed with GO (Graphene Oxide) and laminated to manufacture a sheet shaped composite.
- Using the composite above as a new Filler, we have prepared a Pseudo-Fractal type composite and conducted a basic study expecting improved physical properties.
- In addition, graphene was grown by CVD (Chemical Vapor Deposition), and selective control of crystal direction was performed by heat treatment of piezoelectric ferroelectric polymer (PVDF-TrFE) on the surface.
- In the same way, a basic study was carried out to fabricate complexes controlling crystallinity in Pseudo-Fractal form.
⦁ (Feasibility study3) Design, analysis and testing of Pseudo-Fractal structures based on biomimicry, computational simulation and optimization theory
- A central VT (CVT) method based on Voronoi tesselation (VT) was used as a method for imitating various and hierarchical types of cellular structures.
- In this exploratory research, we have evaluated the stiffness of RVE according to the shape and volume fraction (or density) of the structure. For this purpose, the open-cell material is assumed to be aluminum and to have the mechanical properties of typical aluminum (elastic modulus = 70 GPa, Poisson's ratio = 0.3).
- The results of this research theoretically support that the mechanical stiffness can be different very highly depending on whether the cellular structure (or open-cell structure) is optimized even when the same basic material is applied.
⦁ (Feasibility study4) Manufacture of Cellular and Thermal Metamaterial using next generation manufacturing process technology
- We have conducted individual module design optimizing study, and developed a prototype of the individual modules designed by using projection micro-stereolithography technology to realize the 3D thermal metamaterial function within the Pseudo-Fractural ultra-light structure.
- Aluminum alloy based specimens, which were used in the experiments, were fabricated by SLM Solutions' 3D printer using Selective Laser Melting (SLM) method in order to actualize the configuration of CVT modeling.
- The relative density of the fabricated porous structures is in the range of 0.03 ~ 0.19, and in the case of CVT model, finite element analysis results show that the smaller the number of iteration, the lower the physical property value.
- When the specimen was fabricated with a 3D printer, Young’s modulus (R2 = 0.995) was well predicted but the predictive reliability (R2 = 0.854) was lower for yield strength. It can be assumed that this is caused by machining defects in the structure processed by the 3D printer. This problem can be better by improving the processing method and changing the shape of the structure.
(출처 : SUMMARY 10p)
목차 Contents
- 표지 ... 1
- 제 출 문 ... 2
- 보고서 요약서 ... 3
- 요 약 문 ... 4
- SUMMARY ... 9
- CONTENTS ... 15
- 목차 ... 16
- 제 1 장 先기획연구 개요 ... 17
- 제 1 절 先기획연구의 목적, 필요성 및 범위 ... 17
- 제 2 절 대상 소재기술의 정의 및 개념 ... 18
- 제 2 장 기술개발 현황 및 조사․분석 ... 20
- 1. 국내․외 기술개발 현황 ... 20
- 2. 선행 연구 조사․분석 및 시사점 ... 23
- 제 3 장 기술개발 목표 및 내용 ... 57
- 제 1 절 원천특허 포트폴리오 ... 57
- 제 2 절 연구개발내용 및 범위 ... 73
- 제 3 절 기존 기술과의 차별성 및 원천성 ... 96
- 제 4 절 국가 소재 R&D 전략과의 연계성 및 부합성 ... 98
- 제 5 절 先연구내용 및 결과 ... 100
- 제 4 장 先기획연구 활동 추진 내용 ... 126
- 제 1 절 先기획연구 추진 체계 ... 126
- 제 2 절 先기획연구 방법론 ... 126
- 제 3 절 先기획연구 활동 내용 ... 128
- 제 5 장 기대성과 및 활용 계획 ... 132
- 제 1 절 기대성과 ... 132
- 제 2 절 상용화 예상 분야 ... 133
- 제 3 절 경제성 분석 ... 135
- 제 6 장 참고문헌 ... 138
- 끝페이지 ... 143
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