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学者姓名:章培昆
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Abstract :
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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Background: The accumulation of antibiotics in water systems has received considerable global attention due to its detrimental effects. There is an urgent need to develop rapid and efficient methods for the degradation of antibiotics.Methods: In this work, a highly efficient AgFeO2/Ag3VO4 photocatalyst was successfully fabricated by a hydrothermal method and analyzed using different techniques. Under visible light irradiation, photocatalytic behavior of AgFeO2/Ag3VO4 heterojunctions in the degradation of levofloxacin is investigated. Significant findings: The results showed that p-n heterojunction was formed between AgFeO2 and Ag3VO4, which improved the separation and transfer of photogenerated charge carrier under the action of the internal electric field. The apparent reaction rate of AgFeO2/Ag3VO4 heterostructure toward degradation of levofloxacin reached to 0.2770 min-1, which was about 2.15 times and 36.73 times larger than those of Ag3VO4 and AgFeO2, respectively, and much larger than other counterparts. Furthermore, possible photocatalytic degradation pathway of levofloxacin was comprehensively determined by LC-MS analysis. This work would provide in-depth understanding on the efficient photocatalytic removal of antibiotics for sustainable environmental remediation.
Keyword :
Degradation pathway Degradation pathway p-n heterojunction p-n heterojunction Visible-light photocatalysis Visible-light photocatalysis
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GB/T 7714 | Chen, Zhixin , Ning, Boyuan , Cai, Yanqing et al. Rapid degradation of levofloxacin by p-n heterojunction AgFeO2/Ag3VO4 photocatalyst: Mechanism study and degradation pathway [J]. | JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS , 2023 , 151 . |
MLA | Chen, Zhixin et al. "Rapid degradation of levofloxacin by p-n heterojunction AgFeO2/Ag3VO4 photocatalyst: Mechanism study and degradation pathway" . | JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS 151 (2023) . |
APA | Chen, Zhixin , Ning, Boyuan , Cai, Yanqing , Liu, Minghua , Xu, Pingfan , Zhang, Peikun et al. Rapid degradation of levofloxacin by p-n heterojunction AgFeO2/Ag3VO4 photocatalyst: Mechanism study and degradation pathway . | JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS , 2023 , 151 . |
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以异佛尔酮二异氰酸酯(IPDI)为聚己二酸-对苯二甲酸丁二酯/聚乳酸(PBAT/PLA)共混物的增容剂,通过熔融共混法制备了PBAT/PLA/IPDI共混粒子并吹制得到薄膜。采用红外光谱、扫描电镜、差示扫描量热分析、拉伸试验、热重分析和水蒸气透过率测试等研究了不同含量IPDI对共混薄膜形态结构、结晶性能、力学性能、热性能和阻隔性能的影响。结果表明,IPDI的异氰酸酯基团能与PBAT和PLA发生化学反应,分散相尺寸变小,两相界面变得模糊,有效改善了共混物的相容性。随着IPDI含量的增加,共混物中PBAT的结晶度升高,薄膜的拉伸强度逐渐增大,水蒸气阻隔性能呈现先增大后减小的趋势。当IPDI质量分数为0.5%时,PBAT/PLA/IPDI薄膜的横纵向拉伸强度相较于纯PBAT/PLA薄膜分别提升了74.2%和28.6%,断裂伸长率维持在790%和244%,水蒸气透过率降低了38.2%,表现出良好的力学和水蒸气阻隔等综合性能。
Keyword :
反应增容 反应增容 水蒸气阻隔性能 水蒸气阻隔性能 生物降解 生物降解 聚乳酸 聚乳酸 聚己二酸-对苯二甲酸丁二酯 聚己二酸-对苯二甲酸丁二酯
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GB/T 7714 | 毛帅 , 龚佳荣 , 孙文涛 et al. 异佛尔酮二异氰酸酯反应增容聚己二酸-对苯二甲酸丁二酯/聚乳酸生物降解阻隔膜的结构与性能 [J]. | 高分子材料科学与工程 , 2023 , 39 (08) : 148-155 . |
MLA | 毛帅 et al. "异佛尔酮二异氰酸酯反应增容聚己二酸-对苯二甲酸丁二酯/聚乳酸生物降解阻隔膜的结构与性能" . | 高分子材料科学与工程 39 . 08 (2023) : 148-155 . |
APA | 毛帅 , 龚佳荣 , 孙文涛 , 宁博远 , 罗耀发 , 许平凡 et al. 异佛尔酮二异氰酸酯反应增容聚己二酸-对苯二甲酸丁二酯/聚乳酸生物降解阻隔膜的结构与性能 . | 高分子材料科学与工程 , 2023 , 39 (08) , 148-155 . |
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Isophorone diisocyanate (IPDI) as reactive compatibilizer was introduced into poly(butylene adipate terephthalate) (PBAT)/polylactic acid (PLA) blend by melt blending and extruded into blown films. The effect of IPDI content on the phase morphology, crystallization behavior, mechanical, thermal and barrier properties of PBAT/PLA/ IPDI blended films were investigated by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), differential scanning calorimeter (DSC), universal tensile testing machine, thermogravimetric analyzer (TGA) and water permeability tester. Results demonstrate that the —NCO groups of IPDI can chemically react with PBAT and PLA to form copolymer, which reduces the particle size of PLA dispersed phase and leads to indistinct interface between the two-phase, effectively improving the interfacial compatibility between PBAT and PLA matrix. With increasing the IPDI content in PBAT/PLA/IPDI films, the crystallization ability of PBAT matrix and tensile strength increase, whilst the water vapor barrier performance increases first and then decreases. When the mass fraction of IPDI is 0.5%, compared with the pristine PBAT/PLA film, the PBAT/PLA/IPDI packaging film shows 74.2% and 28.6% enhancement in tensile strength on the transverse direction and machine direction, respectively, maintains decent breaking elongation of 790% and 244%, meanwhile, 38.2% reduction in water vapor permeability coefficient, which suggests the balanced overall mechanical and water vapor barrier properties. © 2023 Chengdu University of Science and Technology. All rights reserved.
Keyword :
biodegradable biodegradable poly(butylene adipate terephthalate) poly(butylene adipate terephthalate) polylactic acid polylactic acid reactive compatibilization reactive compatibilization water vapor barrier property water vapor barrier property
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GB/T 7714 | Mao, S. , Gong, J. , Sun, W. et al. Structure and Properties of Biodegradable Poly(butylene adipate terephthalate)/ Polylactic Acid Packaging Films with Isophorone Diisocyanate as Reactive Compatibilizer; [异佛尔酮二异氰酸酯反应增容聚己二酸-对苯二甲酸丁二酯/聚乳酸生物降解阻隔膜的结构与性能] [J]. | Polymeric Materials Science and Engineering , 2023 , 39 (8) : 148-155 . |
MLA | Mao, S. et al. "Structure and Properties of Biodegradable Poly(butylene adipate terephthalate)/ Polylactic Acid Packaging Films with Isophorone Diisocyanate as Reactive Compatibilizer; [异佛尔酮二异氰酸酯反应增容聚己二酸-对苯二甲酸丁二酯/聚乳酸生物降解阻隔膜的结构与性能]" . | Polymeric Materials Science and Engineering 39 . 8 (2023) : 148-155 . |
APA | Mao, S. , Gong, J. , Sun, W. , Ning, B. , Luo, Y. , Xu, P. et al. Structure and Properties of Biodegradable Poly(butylene adipate terephthalate)/ Polylactic Acid Packaging Films with Isophorone Diisocyanate as Reactive Compatibilizer; [异佛尔酮二异氰酸酯反应增容聚己二酸-对苯二甲酸丁二酯/聚乳酸生物降解阻隔膜的结构与性能] . | Polymeric Materials Science and Engineering , 2023 , 39 (8) , 148-155 . |
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本发明属于阻燃材料技术领域,更具体地是涉及一种单宁酸基单组分膨胀型阻燃剂及其制备方法和应用。以天然生物基单宁酸为碳源,磷氮二元醇为酸源,三嗪衍生物为气源,通过一定的配比关系化学接枝得到单宁酸基单组分膨胀型阻燃剂。本发明提供的单宁酸基单组分膨胀型阻燃剂磷氮元素含量高,富含苯环、三嗪环、酚羟基和端羟基等结构,既可以作为添加型阻燃剂也可以作为反应型阻燃剂,与多种有机高分子材料相容性好,在确保材料性能的前提下,对材料加工工艺条件要求低,可应用于多种有机高分子材料的高效阻燃改性。本发明提供的含有单宁酸基单组分膨胀型阻燃剂的阻燃产品种类多样,制造工艺简单,阻燃性能优异,可大范围推广应用。
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GB/T 7714 | 章培昆 , 毛聪 , 王越岩 et al. 一种单宁酸基单组分膨胀型阻燃剂及其制备方法和应用 : CN202211408762.6[P]. | 2022-11-08 00:00:00 . |
MLA | 章培昆 et al. "一种单宁酸基单组分膨胀型阻燃剂及其制备方法和应用" : CN202211408762.6. | 2022-11-08 00:00:00 . |
APA | 章培昆 , 毛聪 , 王越岩 , 罗耀发 , 许平凡 . 一种单宁酸基单组分膨胀型阻燃剂及其制备方法和应用 : CN202211408762.6. | 2022-11-08 00:00:00 . |
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Photocatalysis is a promising technology for removing micropollutants in water. However, developing efficient and stable catalysts remains a challenge. In this work, a novel step-scheme (S-scheme) heterojunction of WO3/SnIn4S8 (WSI) was constructed through the combined process of in situ precipitation with hydrothermal synthesis to simultaneously realize photocatalytic degradation of bisphenol A(BPA) and reduction of Cr(VI) in contaminated water. Results showed that the WSI S-scheme heterojuction has a synergistic effect for the removal of BPA and Cr(VI). An optimum case of the WSI-12% heterojunction exhibited the highest photocatalytic efficiency in the degradation of BPA under visible light, which is ca. 2.5 and 3.8 times more than the pure WO(3 )and SIS, respectively. The enhanced photocatalytic activity is attributed to the formation of the WSI S-scheme heterojunctions which facilitate the spatial separation of charge carriers and preserve strong photoredox ability. Further, the S-scheme mechanism of enhanced photocatalysis was examined by the radical-trapping experiment and ESR, and superoxide and hydroxyl radicals were determined to be the major reactive oxygen species responsible for BPA degradation and Cr(VI) reduction by WSI. This work provides a novel strategy for tailoring high-performance S-scheme heterojunctions and shows the promising application in purifying wastewater with complex pollutants.
Keyword :
bisphenol A bisphenol A hexavalent chromium hexavalent chromium photocatalytic degradation photocatalytic degradation WO3/SnIn4S8 heterostructure WO3/SnIn4S8 heterostructure
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GB/T 7714 | Xu, Pingfan , Zhang, Runqiu , Gong, Jiarong et al. S-Scheme WO3/SnIn4S8 Heterojunction for Water Purification: Enhanced Photocatalytic Performance and Mechanism [J]. | CATALYSTS , 2023 , 13 (11) . |
MLA | Xu, Pingfan et al. "S-Scheme WO3/SnIn4S8 Heterojunction for Water Purification: Enhanced Photocatalytic Performance and Mechanism" . | CATALYSTS 13 . 11 (2023) . |
APA | Xu, Pingfan , Zhang, Runqiu , Gong, Jiarong , Luo, Yaofa , Zhuang, Yihua , Zhang, Peikun . S-Scheme WO3/SnIn4S8 Heterojunction for Water Purification: Enhanced Photocatalytic Performance and Mechanism . | CATALYSTS , 2023 , 13 (11) . |
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Polyurethane (PU) composites integrated with outstanding fire retardancy, smoke suppression as well as ameliorated mechanical property is attractive, but remains a challenge. Here, we demonstrate the interfacial architecting of organic-inorganic hybrid (ACAPP) by reacting renewable chitooligosaccharide (COS) with ammonium polyphosphate (APP) and ammonium octamolybdate (AOM) via a one-pot, facile and eco-friendly approach. The ACAPP with multiple hydroxyl groups shows good compatibility and strong interfacial adhesion force with PU matrix due to the abundant covalent cross-linking points and hydrogen bonds networks. The incorporation of 15 wt% ACAPP enables the resultant PU composite to achieve a V-0 rating, a limiting oxygen index of 26.1%, 31.1% and 44.8% reduction in total heat release and total smoke production, respectively, far outdistancing conventional APP. The suppressed fire hazards mainly benefits from the synergy catalytic carbonization effect of ACAPP in condensed phase. Moreover, ACAPP reinforces
Keyword :
Fire safety Fire safety Interfacial adhesion Interfacial adhesion Mechanical properties Mechanical properties Polyurethane composites Polyurethane composites
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GB/T 7714 | Xu, Pingfan , Luo, Yaofa , Zhang, Peikun . Interfacial architecting of organic-inorganic hybrid toward mechanically reinforced, fire-resistant and smoke-suppressed polyurethane composites [J]. | JOURNAL OF COLLOID AND INTERFACE SCIENCE , 2022 , 621 : 385-397 . |
MLA | Xu, Pingfan et al. "Interfacial architecting of organic-inorganic hybrid toward mechanically reinforced, fire-resistant and smoke-suppressed polyurethane composites" . | JOURNAL OF COLLOID AND INTERFACE SCIENCE 621 (2022) : 385-397 . |
APA | Xu, Pingfan , Luo, Yaofa , Zhang, Peikun . Interfacial architecting of organic-inorganic hybrid toward mechanically reinforced, fire-resistant and smoke-suppressed polyurethane composites . | JOURNAL OF COLLOID AND INTERFACE SCIENCE , 2022 , 621 , 385-397 . |
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It is critical to design and synthesize superior metal-free PMS catalysts, particularly to optimize the interaction between non-metallic heteroatoms and biochar, facilitating electron conduction and the generation of reactive oxygen species. Hence, this work presented a feasible synthetic strategy for anchoring phosphorus on in-situ nitrogen-doped biochar via ball milling at room temperature. Mechanical forces triggered the dehydration reaction between phosphoric acid and C-OH bonds, forming C-O-P bonds. In particular, the obtained N and P codoped biochar (NPB) showed excellent catalytic activity. The reaction and removal rate of diclofenac sodium (DS) in the NPB/PMS system were 0.3974 min(-1) and 90.08 % (only 10 min), respectively, significantly higher than those in the in-situ nitrogen-doped biochar/PMS system. The impressive catalytic efficiency was attributed to the coupling effect of high-efficiency adsorption and exceptional electron transfer capabilities. Anchoring P into the carbon structure effectively expedited the electron transfer from adsorbed DS molecules to metastable PMS complexes via the carbon-bridge effect, ultimately leading to DS degradation. The C=O groups, pyridinic N, graphitic N, and defect sites were possible active sites for PMS activation. GC/MS identified the potential degradation paths of DS, but the toxicity of DS and its intermediates was noteworthy. Furthermore, the DS degradation efficiency of the NPB/PMS system was little hampered by pH (2.95-9.07), anions, humic acid, and actual water, suggesting its application potential in real-world wastewater. Overall, this study paves a new way for constructing effective N and P co-doped non-metallic PMS catalysts, which may be expanded to other carbon materials to fulfil the unique demands of various applications.
Keyword :
Ball milling Ball milling Electron transfer Electron transfer Fish scale Fish scale N and P co-doped biochar N and P co-doped biochar Peroxymonosulfate Peroxymonosulfate
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GB/T 7714 | Xie, Jia , Xu, Pingfan , Liu, Minghua et al. Anchoring phosphorus on in-situ nitrogen-doped biochar by mechanical milling for promoted electron transfer from diclofenac sodium to peroxymonosulfate [J]. | SEPARATION AND PURIFICATION TECHNOLOGY , 2022 , 301 . |
MLA | Xie, Jia et al. "Anchoring phosphorus on in-situ nitrogen-doped biochar by mechanical milling for promoted electron transfer from diclofenac sodium to peroxymonosulfate" . | SEPARATION AND PURIFICATION TECHNOLOGY 301 (2022) . |
APA | Xie, Jia , Xu, Pingfan , Liu, Minghua , Liu, Yanling , Zhu, Lang , Yu, Fangxia et al. Anchoring phosphorus on in-situ nitrogen-doped biochar by mechanical milling for promoted electron transfer from diclofenac sodium to peroxymonosulfate . | SEPARATION AND PURIFICATION TECHNOLOGY , 2022 , 301 . |
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Seeking a facile strategy to synthesize efficient, inexpensive and robust flame retardants which endow the polyurethane (PU) composites with desirable flame retardancy and mechanical property remains compelling but challenging. Here, we report the surface modification of commercial ammonium polyphosphate (APP) by 3amino-1,2-propanediol in water solution to construct a novel organic-inorganic hybrid. The functionalized APP (FAPP) with multi-hydroxyl, which acts as both intumescent flame retardants and crosslinking agent, was covalently introduced into solvent-free PU composite via a thermo-curing process. Interestingly, FAPP exhibits good compatibility and strong interfacial interactions within PU matrix, which in turn significantly enhances the tensile strength (similar to 40%) of the resultant PU composite, but without compromising the flexibility. With the incorporation of 15 wt% FAPP, the PU composite reaches a limiting oxygen index of 27.2%, and passes UL-94 V0 rating. Meanwhile, the peak heat release rate and total heat release are respectively decreased by 64.5% and 37.8% over that of pristine PU, which is far superior to original APP. The high flame-retardant efficiency primarily results from the formation of compact and intumescent char layers in condensed phase. Accordingly, our practice may be extendable to the implementation in other high-performance flame-retardant polymer-matrix composites.
Keyword :
Flame retardant Flame retardant Interfacial interaction Interfacial interaction Organic-inorganic hybrid Organic-inorganic hybrid Polymer-matrix composites (PMCs) Polymer-matrix composites (PMCs) Surface modification Surface modification
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GB/T 7714 | Yan, Jun , Xu, Pingfan , Zhang, Peikun et al. Surface-modified ammonium polyphosphate for flame-retardant and reinforced polyurethane composites [J]. | COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS , 2021 , 626 . |
MLA | Yan, Jun et al. "Surface-modified ammonium polyphosphate for flame-retardant and reinforced polyurethane composites" . | COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 626 (2021) . |
APA | Yan, Jun , Xu, Pingfan , Zhang, Peikun , Fan, Haojun . Surface-modified ammonium polyphosphate for flame-retardant and reinforced polyurethane composites . | COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS , 2021 , 626 . |
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