采用超临界CO2/N2发泡技术制备了系列低介电特性材料与器件、红外辐射隔断材料和被动辐射冷却材料等。Both the polymer matrix and their supercritical fluid foaming process are optimized, some microcellular polymers with low dielectric properties, infrared radiation isolation or passive radiant cooling property have been obtain.
鞋底发泡材料的微观/宏观数字模拟的设计方法
Tsuyoshi NIishiwak
亚瑟士（中国）商贸有限公司 Asics China Trading Co., Ltd.
亚瑟士中国董事长Chairman of ASICS China 亚瑟士大中华区高级总裁Senior President of ASICS Greater China 亚瑟士集团常务执行董事 Managing Executive Director of Asics Group
After graduation of Osaka univ., he entered ASICS Corporation in 1987 and was assigned in Institute of Sport Science. Doctor of Engineering (1996). Head of Institute of Sport Science(2012-2017). Executive officer (2014-2016). Board member (2016-2018) in ASICS corporation. Chairman of Asics China (2019-)At the same time, he is a vice-chairperson of Textile Machinery Society of Japan. His major is sporting gear designing including consumer-friendly shoe, apparel and equipment based on human response. Many athletes got medals with wearing gears he designed in World championship and Olympic games.
The design of resin foam used in shoe soles is reported. After explaining the required functions of shoe soles, macroscopic structural design techniques to improve shock absorption during running and microscopic structural design techniques to further reduce weight will be introduced with prototyping examples.
He Yadong, Ph.D and Professor of BUCT. In 2011, he was supported by the new century talents support plan of the MOE of China and in 2005, he was supported by Beijing Science and technology star plan. He has undertaken more than 10 national, provincial and ministerial level research projects, including national key basic R & D plan, National Natural Science Foundation of China, National Science and technology support plan, and more than 40 technology projects with industry. He has published more than 200 scientific articles, was granted more than 30 patents, and was awarded 5 provincial and ministerial scientific and technological progress awards. His scientific research area are advanced manufacturing technology and equipment of lightweight materials, such as Processing technology and equipment of supercritical fluid polymer foaming, and Processing technology and equipment of fiber reinforced thermoplastic composites and so on.
The important application fields and preparation difficulties of PET foam materials were elucidated. Based on this, an integrated foaming technology of PET with drying-free reactive extrusion was developed, and the structural anisotropy characteristics formed during the preparation process of PET foam boards were analyzed. The variation of the mechanical properties of PET foamed board in all directions with the density was tested, and the deformation mechanism of PET foams under different loads was analyzed by Ashby's proportional rule. The relationship between the structure and properties of PET foams was obtained, and a theoretical model between the structural and performance differences of PET foam was constructed from the phenomenological perspective.
高性能氯化聚氯乙烯/聚脲纳米复合泡沫的制备及其碳化升级回收
唐涛 Tao Tang
中国科学院长春应用化学研究所 Changchun Institute of Applied Chemistry, Chinese Academy of Sciences
Herein, an upcycling chlorinated polyvinyl chloride/polyurea (CPVC/PUA) nanocomposite foam was designed by means of the “plasticizing-foaming-reinforcing” (PFR) strategy combined with catalytic carbonization of CPVC/PUA foams. On one hand, the foam with ultra-high expansion ratio (62 times) can be facilely prepared in supercritical CO2 at lower temperature, benefited of the reactive plasticizing function of PUA monomer-polymeric methylene diphenyldiisocyanate (PMDI). On the other hand, the obtained foam is reinforced by PMDI crosslinking reaction to in situ form nano-PUA phase in the CPVC matrix and realizing robust and superior solvent resistance and flame-triggered shape memory effect. Moreover, the foam possesses remarkable ablation resistance, which is attributed to super carbonization capacity of CPVC catalyzed by PUA. This carbonization behavior endows the foam directly upcycle into functional carbon foam accompanied by the formation of HCl gas and functional aromatics. The obtained carbon foam shows attractive electromagnetic interference shielding performance, which also may be used as potential carbon source or catalyst of producing vinyl chloride monomer in the chloralkali industry, especially in China.
Xia Liao is currently a full professor of the College of Polymer Science and Engineering, Sichuan University. She is the associate director of International Polymer Foaming Research Center of Sichuan University-University of Toronto, and Polymer Foam and Porous Materials Committee, SAMPE-Chinese Mainland. She got Ph.D. degree from Institute of Chemistry, Chinese Academy of Science in 2003. She was awarded Natural Science and Engineering Research Council of Canada (NSERC) Fellowship to be a postdoctoral fellow of National Research Council of Canada in Jan. 2004. After the Postdoc research at University of Toronto, she joined Sichuan University. Professor Liao has more than 110 research journal papers as first author/corresponding author, 29 issued patents as first inventor in the field of polymer foam processing and characterization, the changes of physical and chemical properties of polymer with the treatment of supercritical fluids, and processing-structure-property relationships of polymer foam. In 2006, she received the Best Paper Award of Foam Division of Annual Technical Conference (ANTEC), Society of Plastics Engineers, USA.
With the rapid development of the electronic industry and communication technology, the number of various wireless communication devices and electronic and electrical components has sharply increased. These electronic devices are subject to external electromagnetic interference (EMI), which can cause disturbances, information leakage, image and sound barriers. At the same time, they also emit a large amount of electromagnetic waves to the outside world, making the space electromagnetic environment increasingly complex. The problem of electromagnetic radiation pollution is becoming increasingly serious, and has become another major environmental pollution besides water pollution, air pollution, noise pollution, and solid waste pollution. The design and preparation of electromagnetic shielding materials with high electromagnetic shielding efficiency, as well as lightweight and high absorption characteristics, is of great significance for the development and upgrading of emerging 5G communication technology and high-power high-frequency electronic and electrical equipment and its components. This study utilized supercritical carbon dioxide green and environmentally friendly micro foaming technology, combined with the design and construction of electromagnetic shielding polymer composites, efficient and controllable construction of three-dimensional conductive pathways, to prepare lightweight and high-performance porous polymer electromagnetic shielding materials. The influence mechanism of microporous morphology and heterogeneous filler network structure on electromagnetic shielding efficiency and absorption performance was explored.
Soft polymeric foams such as EVA foam, PU sponge, rubber foam, etc. are widely used in the fields of running shoe, sports protection, furniture, buffer packaging, etc. Its global market capacity has exceeded 300 billion yuan in 2020. However, traditional soft foams are facing the common issues such as non-environmentally friendly processing, poor performance, and difficulty in physical recycling. Under the requirements the dual carbon economy, the soft foams are transforming and upgrading towards more environmentally friendly, high-performance, recyclable/degradable processing. Thermoplastic elastomers with biodegradable characteristics and supercritical fluid green foaming technology with environmentally friendly and low-carbon characteristics have received widespread attention in the foam applications. This report focuses on the commercial biodegradable elastomer resins, systematically introducing the basic characteristics, foaming methods, and processes of intermittent foaming of elastomers in supercritical fluids. The typical biodegradable elastomer materials are selected, and their supercritical fluid foaming behavior and properties of foams are investigated. Finally, this report introduces the application fields and development directions of biodegradable elastomer foaming materials.
抗收缩生物可降解泡沫的创新工艺探讨
王桂龙 Guilong Wang
山东大学 Shandong University
教授 Professor
王桂龙，山东大学教授/博士生导师，国家万人计划青年拔尖人才，山东省杰出青年基金获得者，担任《Journal of Cellular Plastics》、《Cellular Polymers》期刊编委、模具制造与成型技术专委会副主任委员，主持国家自然科学基金、山东省重大科技创新工程等课题20余项，获国家科技进步二等奖1项、山东省技术发明一等奖和科技进步一等奖各1项，授权发明专利30余项，发表SCI论文150余篇，论文被引7600余次，H因子52。
The inherent shrinkage behavior of the elastomer after foaming is a key factor limiting the development of lightweight high-performance thermoplastic elastomer foams. This report presents two foaming processes to alleviate the shrinkage of degradable thermoplastic foams, including Supercritical N2/CO2 co-foaming process and Two-step foaming process employing in-situ fibrillation and supercritical N2 treatment. The significantly improved three-dimensional porous structures achieved by above processes endow biodegradable elastomer materials with excellent multifunctional properties such as resilience, thermal insulation, and hydrophobicity, which exhibit potential application prospects in fields like biomedicine, intelligent buildings, and flexible sensing.
聚合物发泡材料泡孔结构调控及应用研究
庞永艳 Yongyan Pang
中国科学院宁波材料技术与工程研究所 Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences
Dr. Yongyan Pang (Professor) works in Laboratory of Polymers and Composites in Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences. Dr. Yongyan Pang mainly works on cell structure control, structure-property relationship and applications of polymer foams. She has presided 16 national, provincial, municipal and enterprise-founded projects, with 2 founded by Natural Science Foundation of China. She has published more than 40 papers as the first or the corresponding author, and has filed 34 invention patents and 2 utility model patens, with 24 authorized.
演讲内容概要
本报告主要包括以下四个方面的内容：
开孔PP发泡材料的制备及吸油研究；
尼龙弹性体发泡材料的制备及回弹性研究；
PET纳米复合材料的发泡行为及光学性能研究；
PEFT共聚酯发泡材料的泡孔结构调控及隔热性能研究。
This presentation mainly includes the following four parts:
Preparation of open-cell PP foams and oil sorption;
Preparation of PEBA foams and resilience;
Foaming behavior of PET nanocomposites and optical property;
Cell structure control of PEFT copolymer foams and thermal insulation.
Polymer foams are important buffering materials due to their low density and high energy absorption properties. Aiming to further boost the energy absorption performance of polymer foams, we investigated various means including introducing supramolecular bonds in the molecular chains, fabricating foams with wrinkled, re-entrant, or oriented cellular morphology, and developing numerical simulation models to optimize the foam design. A novel dynamic supercritical CO2 (scCO2) foaming approach is invented to fabricate wrinkled thermoplastic polyurethane (TPU) foams that have superior compressive strength and modulus; A vacuum-counter pressure-assisted scCO2 foaming method is developed to produce polypropene (PP) foams with negative Passoin’s ratio and enhanced energy absorption; A circumferential confined foaming approach is developed to induce uni-directional foaming that produces foams with highly oriented structures which showed anisotropic mechanical performance and outstanding impact absorption property. By introducing reversible chemical bonds like multiple hydrogen bonds, metal coordinate bonds, and ionic bonds, the elastomer foam achieved enhanced impact energy absorption due to the stress-hardening effect of the dynamic bonds. All these works should be valuable for inspiring new thoughts and prospects in the development of polymer foams with high energy-absorbing properties.
热塑性聚氨酯发泡-成型过程优化及其性能调控
胡冬冬 Dongdong Hu
华东理工大学 East China University of Science and Technology
Dr. Hu’s research interest involves scCO2-polymer interaction supercritical fluid foaming polymer and scCO2 emulsion. Now, he chairs programs from National Natural Science Foundation, Natural Science Foundation of Shanghai, the Youth Project of Shanghai Oriental Talent Program, and participates in national key research and development program ‘Lightweight technology for polymer materials’ in China. He is a member of the Professional Committee of Polymer Foams and Porous Materials in SAMPE CHINA, and a young editorial board member of "China Plastics". He has won the First Prize of Shanghai Science and Technology Progress Award, the Second Prize of China Industry-University-Research Institute Cooperation Innovation Achievement Award, and the Excellence Award of China Patent. More than 70 SCI papers have been published, and more than 20 national invention patents have been applied for, with 12 authorized.
Supercritical CO2 combined with integrated foaming-molding process can prepare structural components with complex geometries and high dimensional accuracy, which has the advantages of energy saving and zero wastewater discharge. Thermoplastic polyurethane (TPU) has excellent resilience and low-temperature flexibility, and are widely used in the preparation of electromagnetic shielding (EMI) materials. The unique micro-phase separation structure of TPU significantly affects the foaming process. Here, we will introduce the progress and the challenges about the preparation of TPU foam using supercritical CO2 as the blowing agent. The relationship between microstructure modulation and foaming behavior of TPU is studied. The factors influencing the foaming-molding process of TPU beads are examined. By introducing separated structures, it is expected to prepare TPU bead foam with excellent EMI performance and conductivity.
It mainly introduces the economic situation of polyurethane foams and issues related to foam blowing agent and environmental protection. Specifically, it includes an introduction to the development of polyurethane-related industries, and some hot issues of concern: blowing agent issues, bio-based, waste foam recycling, flame retardant issues and so on.
