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学者姓名:郑玉婴
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Polymer matrix composites with excellent thermal management performance have emerged as remarkable materials in the realms of microelectronic devices and wireless communication technologies. However, achieving high thermal conductivity in most composites often requires a high filling load, which will compromise other desirable properties. Herein, utilizing physical foaming and vacuum infiltration methods, we introduce a 3D honeycomb composite consisting of surface-hydroxylated hexagonal boron nitride (OH-BN) and epoxy. The 3D OH-BN honeycomb foam in the composite features a lightweight design (0.33 g/cm3), high strength (7178 times its own weight) and prominent heat transfer performance. Significantly, these composites achieve notable thermal properties, including high through-plane thermal conductivity (2.073 W m−1 K−1) and relatively low thermal resistance (0.995 °C/W) at a reduced filling load (17.2 vol%). In comparison with pure epoxy, the through-plane thermal conductivity is enhanced by an impressive 894 %, while the thermal resistance is reduced to 1/9.4 of that observed in pure epoxy. Besides, the 3D honeycomb composites combine outstanding mechanical performance, low dielectric properties and excellent insulation, underscoring their potential in the field of thermal management applications in microelectronic devices, wireless communication systems and integrated circuits. © 2024
Keyword :
Boron nitride Boron nitride Dielectric properties of solids Dielectric properties of solids Filled polymers Filled polymers Fillers Fillers Foams Foams Heat transfer Heat transfer Honeycomb structures Honeycomb structures III-V semiconductors III-V semiconductors Nitrides Nitrides Polymer matrix composites Polymer matrix composites Temperature control Temperature control Thermal conductivity Thermal conductivity Thermal insulation Thermal insulation
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GB/T 7714 | Liu, Guang , Ding, Ao , Xu, Pingfan et al. Thermal conductivity of epoxy composites containing 3D honeycomb boron nitride filler [J]. | Chemical Engineering Journal , 2024 , 489 . |
MLA | Liu, Guang et al. "Thermal conductivity of epoxy composites containing 3D honeycomb boron nitride filler" . | Chemical Engineering Journal 489 (2024) . |
APA | Liu, Guang , Ding, Ao , Xu, Pingfan , Zhu, Minmin , Zhang, Haizhong , Zheng, Yuying et al. Thermal conductivity of epoxy composites containing 3D honeycomb boron nitride filler . | Chemical Engineering Journal , 2024 , 489 . |
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A thermal conductive structural adhesive (TCSA) plays a crucial role in battery performance and safety. TCSA made of polyurethane (PU) has not only a good thermal conductivity but also good mechanical strength and substrate bonding strength. However, it has to be cost-effective and easy to be prepared. This work aims to synthesize a series of castor oil-based PU TCSAs with different amounts of thermal conductive powder using commercially available castor oil polyols, isocyanates, Al2O3, and additives. The shear strength of the TCSA containing 88% thermally conductivity powder reached 5.6 MPa, which was similar to that without the thermal conductivity fillers, but its toughness significantly decreased. Its thermal conductivity was as high as 1.8 W/mK, and it was thermally stable below 270 degrees C. Preparation process of castor oil based TCSA and application scenarios in new energy batteries. image
Keyword :
adhesives adhesives biodegradable biodegradable coatings coatings conducting polymers conducting polymers polyurethane polyurethane
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GB/T 7714 | Ding, Ao , Liu, Guang , Xu, Pingfan et al. Design of castor oil-based polyurethane thermal conductive structural adhesive for new energy batteries [J]. | JOURNAL OF APPLIED POLYMER SCIENCE , 2024 , 141 (24) . |
MLA | Ding, Ao et al. "Design of castor oil-based polyurethane thermal conductive structural adhesive for new energy batteries" . | JOURNAL OF APPLIED POLYMER SCIENCE 141 . 24 (2024) . |
APA | Ding, Ao , Liu, Guang , Xu, Pingfan , Wang, Yixin , Zheng, Yuying , Luo, Yaofa et al. Design of castor oil-based polyurethane thermal conductive structural adhesive for new energy batteries . | JOURNAL OF APPLIED POLYMER SCIENCE , 2024 , 141 (24) . |
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Cleanup of oil spills has become one of the most challenging tasks in recent years, as marine oil spills have had a great negative impact on human health and the ecological environment. This also urgently requires the development of new materials and methods with superhydrophobic properties for oil-water separation. As new porous materials, metal-organic frameworks (MOFs) have attracted much attention due to their unique structures and fascinating properties. However, powdered MOF materials are difficult to recycle, and therefore, suitable substrates need to be selected to construct superhydrophobic composites. The surface hydroxyl groups of cellulose fibers offer great possibilities for their superhydrophobic preparation. In this paper, HDTMS-UiO-66@CFs composites with superhydrophobicity were strategically synthesized by in-situ growth of Zr(IV)-based MOFs linked to hexadecyltrimethoxysilane (HDTMS) on cellulosic fibers (cotton fabric) by using a hydrothermal synthesis method. The HDTMS-UiO-66@CFs composites have a water contact angle of 172 degrees and the absorption capacity of light oil and heavy oil is more than 1100%, and the oil-water separation efficiency is as high as 96%. Due to the in-situ growth of the HDTMS-UiO-66 material on cotton fibers, which makes the material more resistant and stable, the material can still maintain its superhydrophobic properties in various harsh environments and after repeated use. Therefore, the newly developed HDTMS-UiO-66@CFs composites have a high potential as novel adsorbent materials for cleaning up offshore oil spills and other applications.Highlights In-situ growth of superhydrophobic metal-organic frameworks (MOF) particles on cellulose fibers. The porous structure of hexadecyltrimethoxysilane (HDTMS)-UiO66 plays a key role in hydrophobicity. HDTMS-UiO66@CFs are chemically stable and have long-term durability. Schematic diagram of the preparation process and properties of superhydrophobic zirconium-based metal-organic framework/cellulose fiber composites. image
Keyword :
cotton fabrics cotton fabrics hydrophobicity hydrophobicity oil-water separation oil-water separation zirconium-based metal-organic framework zirconium-based metal-organic framework
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GB/T 7714 | Hu, Hanwen , Li, Yu , Hong, Xiansheng et al. A superhydrophobic zirconium-based metal-organic framework/cellulose fiber composite material [J]. | POLYMER ENGINEERING AND SCIENCE , 2024 , 64 (5) : 1981-1992 . |
MLA | Hu, Hanwen et al. "A superhydrophobic zirconium-based metal-organic framework/cellulose fiber composite material" . | POLYMER ENGINEERING AND SCIENCE 64 . 5 (2024) : 1981-1992 . |
APA | Hu, Hanwen , Li, Yu , Hong, Xiansheng , Li, Qian , Rao, Ranyi , Gong, Ziyu et al. A superhydrophobic zirconium-based metal-organic framework/cellulose fiber composite material . | POLYMER ENGINEERING AND SCIENCE , 2024 , 64 (5) , 1981-1992 . |
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The gradual permeation of corrosive mediums, external mechanical damage, and ultraviolet (UV) radiation-induced aging are critical factors contributing to the rapid deterioration of the anticorrosive functionality of polymer coatings. In this study, a two-dimensional anticorrosive enhancement material, fluorinated graphene loaded with zinc oxide nanoparticles (FG@ZnO), was synthesized via the heterogeneous nucleation growth method. This material was then embedded into a polyurethane coating to modify the coating matrix, and a biomimetic lotus leaf-like fine micro-nanostructure was fabricated on the coating surface employing a templating approach. Through this internal-external dual modification strategy, an FG@ZnO/SPU composite coating with multiple protective functions was constructed to offer enduring corrosion protection to the steel substrate. Experimental findings reveal that the composite coating exhibits excellent superhydrophobicity, with a water contact angle as high as 152°. Even after immersion in a 3.5 % NaCl solution for 80 days, the composite coating maintains an exceptionally high low-frequency impedance modulus of 1.332 × 1010 Ω cm2, demonstrating exceptional long-term anticorrosive performance. In instances of coating damage, FG@ZnO markedly relieves the corrosion reaction between the corrosive medium and the steel substrate while suppressing galvanic corrosion. Furthermore, the composite coating demonstrates effective resistance against UV radiation-induced aging effects. These exceptional multiple protective properties are attributed to the internal-external dual modification effect of embedded FG@ZnO and biomimetic lotus leaf hydrophobic modification. This study provides an attractive strategy for preparing polymer composite coatings with multiple protective functions for enduring corrosion protection of metals. © 2024 Elsevier B.V.
Keyword :
Biomimetics Biomimetics Composite coatings Composite coatings Contact angle Contact angle Corrosion inhibitors Corrosion inhibitors Corrosion resistant coatings Corrosion resistant coatings Deterioration Deterioration Hydrophobicity Hydrophobicity II-VI semiconductors II-VI semiconductors Polyurethanes Polyurethanes Sodium chloride Sodium chloride Steel corrosion Steel corrosion Synthesis (chemical) Synthesis (chemical) Zinc alloys Zinc alloys Zinc coatings Zinc coatings Zinc oxide Zinc oxide
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GB/T 7714 | Zhang, Jie , Zheng, Yuying . Constructing multi-protective functional polyurethane composite coating via internal-external dual modification: Achieving superhydrophobicity, enhanced barrier, corrosion inhibition, and UV aging resistance properties [J]. | Progress in Organic Coatings , 2024 , 194 . |
MLA | Zhang, Jie et al. "Constructing multi-protective functional polyurethane composite coating via internal-external dual modification: Achieving superhydrophobicity, enhanced barrier, corrosion inhibition, and UV aging resistance properties" . | Progress in Organic Coatings 194 (2024) . |
APA | Zhang, Jie , Zheng, Yuying . Constructing multi-protective functional polyurethane composite coating via internal-external dual modification: Achieving superhydrophobicity, enhanced barrier, corrosion inhibition, and UV aging resistance properties . | Progress in Organic Coatings , 2024 , 194 . |
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In recent years, thermoplastic polyurethane elastomer has shown great application prospects in the fields of polymer film due to its outstanding tensile properties, high elasticity, wear resistance, oil resistance, low temperature resistance, wide range of hardness, and other properties. However, its flammable properties greatly limit its application in the field of polymer film. The self-made GO was used as a carbon source, phenylboronic acid as an acid source, ammonium polyphosphate (APP) as an acid and gas source, and intumescent flame retardant (IFR) was compounded. The IFR was introduced into thermoplastic polyurethane (TPU) to prepare a series of IFR/TPU composite films with different formulations. The results show that PA and GO can make up for the loss of mechanical properties caused by the addition of APP and improve the thermal stability of the composite film, and the IFR flame retardant composed of the two and APP can effectively improve the flame retardancy of the composite film. When the additions of APP, PA, and GO were 10, 3, and 0.75%, respectively, the LOI value of the IFR/TPU composite material reached 29.5, the flame-retardant grade reached V-0, and its peak heat release rate, total heat release, peak smoke production rate, and total smoke release were 86.0, 64.9, 70.5, and 21.7%, greatly lower than pure TPU, respectively. The flame retardancy of the spacer composite membrane constructed from Ti-7 was significantly improved, and the burn-through time of the single-layer film sample was increased by 2.22 times, and the double-layer film sample was increased by 2.63 times.
Keyword :
Expansion flame retardant Expansion flame retardant Flame-retardant Flame-retardant Mechanical properties Mechanical properties Space composite film Space composite film Thermoplastic polyurethane elastomer Thermoplastic polyurethane elastomer
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GB/T 7714 | Zheng, Weijie , Cai, Qingshu , Xiong, Lei et al. Highly efficient GO-based synergistic intumescent flame retardant/thermoplastic polyurethane for spatial composite film: insight into flame retardancy and mechanism [J]. | JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY , 2024 , 149 (14) : 7289-7300 . |
MLA | Zheng, Weijie et al. "Highly efficient GO-based synergistic intumescent flame retardant/thermoplastic polyurethane for spatial composite film: insight into flame retardancy and mechanism" . | JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY 149 . 14 (2024) : 7289-7300 . |
APA | Zheng, Weijie , Cai, Qingshu , Xiong, Lei , Zheng, Yuying . Highly efficient GO-based synergistic intumescent flame retardant/thermoplastic polyurethane for spatial composite film: insight into flame retardancy and mechanism . | JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY , 2024 , 149 (14) , 7289-7300 . |
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The rapid progress in miniaturization and integration of semiconductor power devices has made heat dissipation a critical concern in the development of high-performance semiconductor devices, thereby increasing the demands for the heat transfer efficiency of polymer composites. To address this issue, an efficient three-dimensional (3D) heat conduction network structure is constructed in the polymer matrix by leveraging the mutual reaction of amino and epoxy groups on the surface of the filler treated by coupling during the melt mixing process, this approach leads to an enhancement in the thermal conductivity of the composites. First, the inert surfaces of graphene nanosheets (EX-G) and carbon fibers (CF) are coated with polydopamine (PDA) to form active sites. Subsequently, the graphene (EX-G), alumina (Al2O3), and carbon fiber (CF) are treated with an amine coupling agent (KH550) and epoxy coupling agent (KH560), respectively. Notably, at a filler content of 25 wt%, the thermal conductivity (TC) of the composites increases by approximately 282% compared to pure nylon 6. This research contributes novel insights into the field of thermally conductive polymer composites.Highlights The surface of the EX-G and CF covered by PDA generates active sites. Fillers reduce the interface thermal resistance through chemical bonds. Fillers surface reaction builds a 3D thermal conductive network. 3D network structure can significantly improve the TC of composites. Only 25 wt% of hybrid fillers in a 282% increased TC of composites. Schematic illustration of heat flow conduction through a 3D thermally conductive structure in a composites. image
Keyword :
composites composites coupling agent coupling agent non-covalent functionalization non-covalent functionalization thermal conductivity thermal conductivity three-dimensional structural network three-dimensional structural network
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GB/T 7714 | Li, Qian , Rao, Ranyi , Hong, Xiansheng et al. Thermal conductive nylon 6 composites using hybrid fillers to construct a three-dimensional thermal conductive network [J]. | POLYMER COMPOSITES , 2024 , 45 (7) : 6169-6183 . |
MLA | Li, Qian et al. "Thermal conductive nylon 6 composites using hybrid fillers to construct a three-dimensional thermal conductive network" . | POLYMER COMPOSITES 45 . 7 (2024) : 6169-6183 . |
APA | Li, Qian , Rao, Ranyi , Hong, Xiansheng , Hu, Hanwen , Li, Yu , Gong, Ziyu et al. Thermal conductive nylon 6 composites using hybrid fillers to construct a three-dimensional thermal conductive network . | POLYMER COMPOSITES , 2024 , 45 (7) , 6169-6183 . |
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In recent years, loading antioxidants onto inorganic nanoparticles has attracted increasing interest. However, the existing studies not only have low antioxidant loading efficiency, but also ignore the relationship between structural changes and antioxidant properties before and after antioxidant modification, greatly limiting the improvement of the antioxidant properties of composites and their application scope. In this work, we successfully prepared bis-hindered phenolic antioxidants containing silica hydroxyl groups (Bis-mAO) and loaded them onto silicon dioxide (SiO 2 ) to get the nanocomposites (Bis-mAO-SiO 2 ). The melt blending method further prepared the corresponding polyphenylene sulfide (PPS)/Bis-mAO-SiO 2 composites. The results showed that the higher antioxidant loading and more suitable antioxidant structure made Bis-mAO-SiO 2 possess excellent antioxidant properties. The prepared PPS/Bis-mAO-SiO 2 composites remained stable under high temperatures and oxygen environments. Impressively, the maximum weight loss rate temperature of PPS/Bis-mAO-SiO 2 was increased by 11.60 degrees C compared to that of PPS, and after accelerated thermal oxidation at 220 degrees C for 24 h, the relative intensity ratio between O and C of PPS/Bis-mAO-SiO 2 only increased to 0.086, much lower than 0.132 for PPS. Moreover, the viscosity of PPS/Bis-mAO-SiO 2 only increased by 29.05 % and 88.75 % after accelerated thermal oxidation at 220 degrees C for 12, 24 h. Compared, PPS ' s viscosity increased substantially by 79.22 % and 250.3 %, respectively. This meant that the Bis-mAO-SiO 2 successfully achieved a synergistic integration of high antioxidant properties and thermal stability, implying that the work offered a strategy for fabricating hightemperature resistant antioxidant composites.
Keyword :
Hindered phenolic Hindered phenolic Polyphenylene sulfide Polyphenylene sulfide Rheological properties Rheological properties Silicon dioxide Silicon dioxide Thermal oxidation stability Thermal oxidation stability
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GB/T 7714 | Cai, Weilong , You, Jian , Wang, Wei et al. Double-hindered phenolic SiO 2 composites with excellent oxidation resistance and thermal stability for enhanced thermal oxidation stability of PPS [J]. | CHEMICAL ENGINEERING JOURNAL , 2024 , 487 . |
MLA | Cai, Weilong et al. "Double-hindered phenolic SiO 2 composites with excellent oxidation resistance and thermal stability for enhanced thermal oxidation stability of PPS" . | CHEMICAL ENGINEERING JOURNAL 487 (2024) . |
APA | Cai, Weilong , You, Jian , Wang, Wei , Chen, Huaiyin , Liu, Longmin , Ma, Yuhan et al. Double-hindered phenolic SiO 2 composites with excellent oxidation resistance and thermal stability for enhanced thermal oxidation stability of PPS . | CHEMICAL ENGINEERING JOURNAL , 2024 , 487 . |
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以氯铂酸溶液为催化剂,将烯丙氧基聚氧乙烯醚(APEG)和聚甲基氢硅氧烷(PMHS)进行硅氢加成反应合成有机硅改性聚醚(Si-APEG),并以其作为耐低温剂,制备耐低温慢回弹聚氨酯(PU)海绵.研究了Si-APEG添加量对海绵表观芯密度、开孔率、拉伸性能、硬度、回弹性能以及温湿度敏感指数的影响.结果表明,当Si-APEG添加量为10份时海绵的泡孔结构较理想,综合力学性能最优,回弹性能最低,同时其温湿度敏感指数低至1.01,硬度在-10℃低温下仍可低至53度,因此该添加量下海绵的综合性能最优.
Keyword :
慢回弹 慢回弹 有机硅改性聚醚 有机硅改性聚醚 硬度 硬度 耐低温 耐低温 聚氨酯海绵 聚氨酯海绵
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GB/T 7714 | 翁城武 , 郑玉婴 . 耐低温慢回弹聚氨酯海绵材料制备及性能研究 [J]. | 中国塑料 , 2023 , 37 (2) : 51-55 . |
MLA | 翁城武 et al. "耐低温慢回弹聚氨酯海绵材料制备及性能研究" . | 中国塑料 37 . 2 (2023) : 51-55 . |
APA | 翁城武 , 郑玉婴 . 耐低温慢回弹聚氨酯海绵材料制备及性能研究 . | 中国塑料 , 2023 , 37 (2) , 51-55 . |
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The foaming of PP has encountered challenges because of its low melt strength and semi-crystalline characteristics. Introducing long chain branching (LCB) onto the PP backbone and the addition of particles as cell nucleating agent are the commonly used methods to improve the cell structure of PP foams. In this paper, clay-supported sodium benzoate (NaB-OMMT) was prepared from Na-montmorillonite (Na-MMT) via the partial ion exchange reaction with surfactant and subsequent reaction with benzoic acid. The as prepared NaB-OMMTs were then applied to prepare LCBPP/NaB-OMMT nanocomposites and their foams. The dispersion state of clay, crystallization behaviors and rheological properties of the nanocomposites, as well as the cell structure and compression properties of the foams were investigated. The results show that clay layers are mostly exfoliated in the nanocomposites with low NaB-OMMT content, while intercalated layers dominant with the content reaches 2% or higher. The melting temperature of the nanocomposites decreases and the crystallinity increases, while the spherulite size decreases compared to LCBPP. The melt viscosity and elasticity of nanocomposites increase significantly when the content of NaB-OMMT reaches 2% or higher. LCBPP/ NaB-OMMT nanocomposites foams exhibit higher cell density, smaller cell size and its standard deviation. Therein, the foam with 1% of NaB-OMMT shows the maximum cell density and the minimum cell size. It is concluded that the cell structure of the foam is highly dependent on the content, dispersion state and structure of the cell nucleating agent. When NaB is supported on well dispersed and exfoliated clay layers, the cell nucleation efficiency is significantly enhanced. The compression properties of the foams depend on their cell structures and exhibit the similar variation trend with the latter with the content of NaB-OMMT increasing.
Keyword :
cell structure cell structure crystallization crystallization foaming foaming nucleating agent nucleating agent Polypropylene Polypropylene
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GB/T 7714 | Cao, Jing , Zou, Jingwen , Zheng, Siying et al. Preparation of clay-supported sodium benzoate and its effect on the rheology, crystallization and foaming of long chain branched polypropylene [J]. | JOURNAL OF CELLULAR PLASTICS , 2023 , 59 (4) : 313-334 . |
MLA | Cao, Jing et al. "Preparation of clay-supported sodium benzoate and its effect on the rheology, crystallization and foaming of long chain branched polypropylene" . | JOURNAL OF CELLULAR PLASTICS 59 . 4 (2023) : 313-334 . |
APA | Cao, Jing , Zou, Jingwen , Zheng, Siying , Wen, Na , Xu, Weijie , Zheng, Yuying . Preparation of clay-supported sodium benzoate and its effect on the rheology, crystallization and foaming of long chain branched polypropylene . | JOURNAL OF CELLULAR PLASTICS , 2023 , 59 (4) , 313-334 . |
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采用石墨烯、热塑性聚氨酯(TPU)复合改性聚氨酯注浆材料,并添加少量的粉煤灰、炉底渣及碱性激发剂制备一种低密度、高强度、快硬性的TPU/石墨烯改性聚氨酯注浆材料.借助聚氨酯弹性体材料密度测试仪、万能材料试验机、渗透系数测试仪、荧光显微镜对TPU/石墨烯改性聚氨酯注浆材料的密度、膨胀倍数、抗压强度、阻燃性能、渗透系数及微观形貌进行表征,深入分析了石墨烯和TPU的种类和含量对聚氨酯注浆材料基本物理性能、力学性能及微观结构的影响.结果表明,TPU/石墨烯改性聚氨酯注浆材料的密度为0.24~1.25 g/cm3,膨胀倍数最高可达38倍,抗压强度为15.0~43.8 MPa,相比普通聚氨酯注浆材料,改性聚氨酯注浆材料抗压强度提升1倍以上.酒精灯燃烧试验显示注浆材料无焰燃烧时间均小于20 s.石墨烯和TPU均可提高聚氨酯的强度和耐久性,改善TPU的微观形貌.TPU/石墨烯改性聚氨酯注浆材料表现出良好的强度、耐久性及弹性,是一种性能优异的注浆材料.
Keyword :
微观形貌 微观形貌 热塑性聚氨酯 热塑性聚氨酯 石墨烯 石墨烯 粉煤灰 粉煤灰 聚氨酯注浆材料 聚氨酯注浆材料
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GB/T 7714 | 周新星 , 郑玉婴 , 陈乘鑫 et al. 热塑性聚氨酯/石墨烯改性聚氨酯注浆材料的制备与性能研究 [J]. | 中国塑料 , 2023 , 37 (1) : 54-59 . |
MLA | 周新星 et al. "热塑性聚氨酯/石墨烯改性聚氨酯注浆材料的制备与性能研究" . | 中国塑料 37 . 1 (2023) : 54-59 . |
APA | 周新星 , 郑玉婴 , 陈乘鑫 , 孔繁盛 . 热塑性聚氨酯/石墨烯改性聚氨酯注浆材料的制备与性能研究 . | 中国塑料 , 2023 , 37 (1) , 54-59 . |
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