最新刊期
卷 33 ， 期 12 ， 2020
- 摘要：High-performance thermal conductive materials have played more and more important roles in the growing microelectronics industry and have attracted widespread attention. Hexagonal boron nitride (h-BN) is one of the most important fillers for the preparation of high thermal conductivity and multifunctional composite materials, while boron nitride nanosheets (BNNS) having similar structure to graphene show better performance than h-BN. We summarize the preparation of BNNS and the surface modification methods, and application in the fabrication of BNNS/polymer thermal conductive composites.关键词：BNNS;Thermal conductivity;Composites;Surface modification
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发布时间：2022-08-31 - 摘要：The depletion of oil and the urgency to protect the environment have promoted the continuous exploration of sustainable alternatives to petroleum-based industrial chemicals. Sustainable chemicals are mainly derived from natural plant and agricultural waste. Because of their biodegradability and low toxicity during preparation, use, and posttreatment, these resources can synthesize environmentally friendly new processed materials. Among the polymers used daily, phenolic resins, epoxy resins, and polybenzoxazines have a wide range of applications in the electronics industry, construction, fireproofing materials, adhesives, and coatings. This paper reviews the researches of the preparation of the above resins by natural phenols in the agricultural and industrial wastes such as cardanol, lignin derivatives, coumarin, biooil etc. and the future development direction.关键词：Bio-based phenols;Phenolic resins;Epoxy resins;Polybenzoxazines
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发布时间：2022-08-31 - 摘要：Epoxy resin has been widely used due to its excellent mechanical properties, dielectric properties and good processability, mainly in the fields of electrical packaging, circuit boards, coatings, and combination agents. Because of the low thermal conductivity of the epoxy resin, it is easy to generate heat accumulation during the operation of the device, resulting in a significant reduction in the service life of the device. Therefore, improving the thermal conductivity of epoxy resin is particularly important for their application. By filling high thermal conductive filler into the epoxy resin, the thermal conductivity can be greatly improved. This mini-review briefly introduces the thermal conductivity mechanism of epoxy resin-based thermal conductive composites, focusing on the synergistic effect between various fillers and constructing an effective thermal conductive network, and forecasts its new development direction.关键词：Epoxy resin;Composites;Synergistic effect;Thermal conductive network
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发布时间：2022-08-31 - 摘要：With the development of the high-tech information era, we have put forward higher requirements for the performance of secondary batteries. As one of the key components of the battery, the separator directly affects the overall performance of the battery. The traditional commercial polypropylene separator has limited the performance of the battery due to its low electrolyte wettability and poor thermal stability. Therefore, modification of the polypropylene battery separator is an important method to obtaining a high performance battery. In recent years, researchers have modified the polypropylene separators by surface coating, surface grafting and constructing multilayer structure to improve the performance of batteries. This paper introduces the latest research progress of the modification of polypropylene separator.关键词：Polypropylene;Battery separator;Lithium-ion battery;Lithium-sulfur battery
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发布时间：2022-08-31 - 摘要：Lithium-Sulfur (Li-S) batteries have attracted great attention because of their excellent capacity and high theoretical energy density. At the same time, sulfur has a serious of advantages, such as nontoxic, abundant and environmentally friendly. However, insulating property of sulfur, shuttle effect of polysulfides and volumetric expansion during charge-discharge process restricted the application of Li-S batteries. Strategies of modifying the conductive carbonbased materials and employing polymer binders were developed to solve the problems. In this mini-review, we assessed nonaqueous binders and aqueous binders and look forward to the further development of new binders.关键词：Li-S batteries;Polymer;Nonaqueous binders;Aqueous binders
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发布时间：2022-08-31 - 摘要：Polymer field-effect transistors (PFETs) have been extensively studied because of their potential applications in flexible display and wearable electronic devices. Particularly, the design and synthesis of high-performance polymers has become the focus of academic research. A number of studies have shown that the side chains of conjugated polymers not only endow solubility, but also affect the alignment orientation and stacking mode of polymer chains, thus affecting the morphology and properties of semiconductor films. In this mini-review, the recent progress of modification of side chains of conjugated polymers is introduced, including changing the length of side chains, changing the position of side chains, changing the branching position, replacing one bulky branching chain with a linear one, and modifying side chains with functional groups. In addition, the effects of side chain modification on the crystallization process and device performance are highlighted and the future development for in-depth understanding of the side chain effect is discussed.关键词：OFETs;Conjugated polymers;Modification of side chains;Intermolecular/interchain packing
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发布时间：2022-08-31 - 摘要：Organic solar cells (OSCs) are important photovoltaic devices with light weight and easy to be processed. They are the research hotspots in the field of photovoltaics. Conventional organic solar cells adopt classical laminated structure, and consist of electron transport layer, active layer, and a hole transport layer. Among them, the active layer material is a key component to realize the conversion from solar energy to electrical energy. The material types, internal structure and surface topography of the active layer will have an important impact on the power conversion efficiencies (PCE) of the photovoltaic device. Here, we introduce the research progress of OSCs active layer materials in recent years and summarize the active layer materials of fullerene OSCs and non-fullerene OSCs, and then we predict the development trend of them.关键词：OSCs;Active layer materials;Fullerene;Non-fullerene
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发布时间：2022-08-31 - 摘要：Thermoelectric materials are a new type of functional material in which carriers migrate inside the solid to achieve direct conversion between heat and electricity. Inorganic thermoelectric materials currently have the best thermoelectric properties, but they have the disadvantages of being difficult to process, high in cost, and toxic. The organic thermoelectric materials are flexible and easy to process, rich in resources, low in cost, and environmentally friendly, thus gradually becoming the research focus of thermoelectric materials. Among them, polyaniline (PANI) is an excellent conductive polymer, which has attracted research interests due to its good thermoelectric properties. This mini-review introduces the research progress of PANI thermoelectric materials in recent years, and proposes its future development.关键词：Polyaniline;Composites;Thermoelectric performance
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发布时间：2022-08-31 - 摘要：As lithium-ion batteries are increasingly used as power sources in electric vehicles, the demand for highperformance lithium-ion batteries is growing. High-performance separators, which serve as an important component in lithium-ion batteries, are also attracting more and more attention. Over the past few years, for improving the energy density, safety, and long-term use of lithium-ion batteries, researchers have developed different methods to design and synthesize advanced membrane materials with high porosity, high electrolytes-affinity, high rate capacity, thermal stability, electrochemical stability and other functional properties. In this review, the latest developments of advanced separators in lithium-ion batteries have been summarized, and an outlook for the future development is presented.关键词：Lithium-ion batteries;Polymers;Separators;High-performance
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发布时间：2022-08-31 - 摘要：Nano-particles assembly has been a quite useful method for producing nanoscale materials during the past decade, which also has many meaningful results and well developments. Classified by different methods, several newly published representative results such as solution process, patchy particles, liquid crystal assembly and nano-particles surface construction, are included and briefly illustrated in this article. Apart from introducing some methods and thoughts, we also give an outlook for this research area.关键词：Nano-particles;Assembly;Research progress
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发布时间：2022-08-31 - 摘要：With the rapid development of electronic and communication technology, a large amount of electromagnetic radiation has been produced, which not only disturbs other electronic equipment, but also affects the precision of equipment, and even threatens the human health. Therefore, the demand for electromagnetic interference (EMI) shielding materials is increasing. On the other hand, in terms of aerospace and portable electronic equipment, lightweight EMI shielding materials are also needed. Graphene, the new carbon nanomaterial, has received extensive attention in the field of EMI shielding owing to its excellent microstructure and dielectric properties. In this paper, three kinds of porous graphene/ polymer materials for EMI shielding have been reviewed, including graphene/polymer composite foams, graphene/polymer porous films, and graphene aerogels/polymer composites. The development trend of porous graphene/polymer electromagnetic shielding materials in the future has also been prospected.关键词：Electromagnetic shielding materials;Graphene;Porous materials
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发布时间：2022-08-31
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