JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2020
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IF 6.155
Baoquan Wan,Haiyu Li,Yunhui Xiao,Zhongbin Pan,Qiwei Zhang
Conventionally, interface effects between polymers and fillers are essential for determining the breakdown strength and energy storage density of polymer-based dielectric composites. In this study, we found that interface effects between different fillers have similar behavior. BN and BaTiO 3 fiber composite fillers with three different interface bonding strengths were successfully achieved by controlling composite processes (BT-fiber/BN < BT-fiber@BN < BT-fiber&BN), and introduced into a polyimide (PI) matrix to form composite films . Considerably enhanced breakdown strength and energy storage density were obtained in BT-fiber&BN/PI composites owing to strong interface bonding, compared to other two composite fillers, which are well supported by the data from the finite element simulation. Specifically, PI composites with only 3 wt% BT-fiber&BN possess an optimized energy storage density of approximately 4.25 J/cm 3 at 4343 kV/cm. These results provide an effective way for adjusting and improving the energy storage properties of polymer-based composites.
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高影响因子
CARBON
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2019
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IF 7.466
Jianwei Li,Yuanqing Ding,Ni Yu,Qiang Gao,Xun Fan,Xuan Wei,Guangcheng Zhang,Zhonglei Ma,Xinhai He
Carbon foams are obtained by pyrolysis of conventional polymeric porous materials usually show poor mechanical properties . The preparation of lightweight carbon foams with high mechanical strength and adjustable three-dimensional architecture still remains a huge challenge. This work reports an efficient approach for fabricating rigid carbon foams via carbonization of thermosetting polyimide foam. Benefiting from the cross-linked networks, the prepared carbon foams present excellent thermal and dimensional stability with low shrinkage of ∼47% after carbonized at 1500 °C. Moreover, the compressive strength of the carbon foams after carbonized at 1200 °C (CF-1200) reaches 0.25 MPa at 10% strains with the density of 0.091 g cm −3 . Notably, the CF-1200 shows superior electromagnetic interference (EMI) shielding effectiveness and specific EMI shielding effectiveness of ∼54 dB and 593.4 dB cm 3 /g respectively at 10 GHz with the thickness of 2.0 mm. In particular, the bulk density, mechanical properties, electrical conductivity of carbon foams can be adjusted by varying the characteristics of polyimide foam accordingly. As the result, these lightweight and stiff carbon foams with such superior EMI SE have great potential applications as structural-functional integrated materials in the aerospace and wireless telecommunication fields.
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高影响因子
Nanoscale Advances
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2021
·Vol. 3
·期 19
·5683-5693
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IF 4.553
Yue Zhu,Xingbin Zhao,Qingyu Peng,Haowen Zheng,Fuhua Xue,Pengyang Li,Zhonghai Xu,Xiaodong He
With the development of multifunction and miniaturization in modern electronics, polymeric films with strong mechanical performance and high thermal conductivity are urgently needed. Two-dimensional transition metal carbides and nitrides (MXenes) have attracted extensive attention due to their tunable surface chemistry, layered structure and charming properties. However, there are few studies on using MXenes as fillers to enhance polymer properties. In this paper, we fabricate a three-dimensional foam by the freeze-drying method to enhance the interfacial interaction between adjacent MXene sheets and polyimide (PI) macromolecules, and then a composite film with a dense and well-ordered layer-by-layer structure is produced by the hot-pressing process. Based on the secondary orientation strategy, the resultant MXene/PI film exhibits an enhanced thermal conductivity of 5.12 ± 0.37 W m−1 K−1 and tensile strength of 102 ± 3 MPa. Moreover, the composite film has good flexibility and flame retardancy owing to the synergistic effect of MXene sheets and PI chains. Hence, the MXene/PI composite film with the properties of flexibility, flame-retardancy, high mechanical strength and efficient heat transmission is expected to be used as the next thermal management material in a variety of applications.
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高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
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2020
·Vol. 167
·期 11
·110525
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IF 3.721
Yuhua Sun,Bing Li,Shiyou Guan
In lithium-ion batteries, carbonyl redox of polyimides based on bridged dianhydride as electrodes exhibit a low electrochemical activity. In order to explain this phenomenon, we selected three previously reported bridged dianhydride including BTDA, BPDA and ODPA combined with p-PDA to form polyimides noted as PI-1, PI-2 and PI-3, respectively as electrode materials, and polyimide PI-4 composed of NTCDA and p-PDA as contrast. Galvanostatic charge/discharge test was measured in 1 M LiPF6 mixed carbonate electrolyte at 1.2 to 3 V vs Li+/Li, the results showed that PI-1, PI-2 and PI-3 have severe polarization and poor reversibility. Electrochemical impedance spectroscopy (EIS) of the electrodes indicated that the polarization was mainly caused by the much smaller lithium ion diffusion coefficients of PI-1, PI-2 and PI-3 than PI-4. Further research on the cyclic voltammetry of the model compounds dissolved in 1 M LiPF6 or 0.1 M TBAPF6 mixed carbonate electrolyte proved that strong interaction existed between the reduction products and lithium ions was the main reason for poor reversibility and small lithium ion diffusion coefficient of PI-1, PI-2 and PI-3. The data in this work can provide a reference for the future research of polyimide electrode materials.
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高影响因子
APPLIED PHYSICS LETTERS
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2012
·Vol. 101
·期 1
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IF 3.844
Zhou Yongcun,Wang Lu,Zhang Hu,Bai Yuanyuan,Niu Yujuan,Wang Hong
A kind of polymer based composites was prepared by embedding the fillers of core-shell Ag@SiO 2 nanoparticles into the polyimide (PI) matrix. The obtained Ag@SiO 2 /PI (50% vf of fillers) composites show remarkably improved high thermal conductivity and low relative permittivity. The maximum value of the thermal conductivity of composites is 7.88 W/(mK) and the relative permittivity and dielectric loss are about 11.7 and 0.015 at 1 MHz, respectively. Compared with self-passivated nanometer Al* particles composites, core-shell Ag@SiO 2 nano-composite is beneficial to increase the thermal conductivity and reduce the permittivity of the composites. The relative mechanism was studied and discussed.
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高影响因子
FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
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2026
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IF 1.8
Yulin Zhu,Zhipeng Liu,Dehua Li,Feiyang Xu,Yongsheng Li,Zhuoni Jiang,Wenbin Yang,Fangfang He
Phase change materials (PCMs) possess exceptional energy storage capacity, rendering them highly attractive for latent heat storage and thermal management applications. However, their deployment is constrained by inherent limitations, including susceptibility to leakage and poor shape stability. To overcome these issues, polyimide aerogel (PIA) was selected as the support substrate due to its low density and excellent mechanical properties. By optimizing the freezing methods of the precursor and imidization time, PI aerogel reached the maximum compressive strength of 400 kPa, while having excellent thermal insulation performance. Subsequently, polyethylene glycol (PEG) was encapsulated within PIA to form PIA@PEG shape-stabilized PCMs (SSPCMs). The PIA@PEG exhibited excellent shape stability, thermal cycling stability, latent thermal storage capacity of 161.4 J/g, and superior solar–thermal conversion performance of 83.7%. Semi-filled PIA@PEG composites with bilayer structure were developed. The metal fighter jet model, coated with bilayer PIA@PEG composites, exhibited outstanding infrared stealth and thermal camouflage performance. These results confirm that PIA@PEG composites have great potential as infrared stealth materials.
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Baoquan Wan,Haiyu Li,Yunhui Xiao,Shuangshuang Yue,Yunying Liu,Qiwei Zhang
BaTiO 3 (BT) nanofibers with different surface defects were prepared by electrospinning process through controlling the sintering atmospheres (Air, N 2 and H 2 ), and introduced into polyimide (PI) matrix to form composite films. The effects of different surface defects on dielectric and energy storage properties of PI composites were systematically investigated. The results showed that the fabricated composite films under a reducing (H 2 ) atmosphere exhibited excellent dielectric properties, compared with that under Air and O 2 . The dielectric constant (ε r ) of PI composite films with 20 wt% BT-fibers reached up to 17.6, while maintaining lower loss (tgδ = 0.006@100 kHz), which was about four times greater than that of pure PI (ε r = 4.1). When the content of BT-fiber was up to 15 wt%, the composite film exhibited a maximum energy storage density of U e = 6.12 J/cm 3 . These results provide an effective method to tune the dielectric and energy storage properties of ferroelectric/polymer composites.
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高影响因子
APPLIED SURFACE SCIENCE
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2022
·
IF 7.392
Ruihan Wang,Nanxi Dong,Guofeng Tian,Gang Liu,Bo Zhou,Shengli Qi,Dezhen Wu
In order to allow polyimide (PI) to resist the erosion of atomic oxygen (AO) in Low Earth Orbit to extend the life of the aircraft, an in-situ precursor network approach was proposed to manufacture the inorganic gradient microstructure across the organic/inorganic transition interface and simplify the process, which create a three-tier microstructure film and lead the dense SiO 2 protective layer firmly grasps the PI film. Benefiting from the integrated structure, SiO 2 -coated PI film shows remarkable surface and interface state after 3000 times mechanical bending, which able to delay the initial AO corrosion caused by the defect of the protective layer, resistance to AO reported as AO erosion yield of 2.39 × 10 −26 cm 3 O atom −1 under 7 × 10 21 O atoms cm −2 AO fluence. This work proposes a novel approach for the fabrication of high-performance and AO resistant PI to enable the aircraft to complete more efficient and highly integrated flight missions and shows great potential in the general preparation of organic-inorganic interface.
研究领域:
高分子材料科学
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航天材料工程
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表面与界面化学
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空间环境效应
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功能涂层技术
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DOI
高影响因子
POLYMER
·
2026
·
IF 5.1
Xiaochao Sun,Linzhu Wang,Yicheng Wang,Yu Liu,Rong Liu,Yujia Xie,Shengtao Dai,Jiaming Guo
Synthesis of a A-PAAS sizing agent featuring a “rigid-flexible” synergistic structure. • The flexural strength and ILSS of 0.5-CF/PEEK were largely increased by 59.8% and 35.0%. • The possible interfacial modification and thermal properties is comprehensive analyzed. • The as-prepared A-PAAS sizing agent is environmentally friendly. Polyimide (PI) has attracted increasing attention in recent decades for interfacial optimization of carbon fiber/polyether ether ketone (CF/PEEK) composites owing to its outstanding thermal resistance. This study effectively incorporated a novel polyimide sizing agent (A-PAAS) by introducing non-coplanar alicyclic rings, amide functional groups, and ammonium ions into the polymer backbone through molecular design. This structural design effectively reduces the packing density of molecular chains, facilitating easier spreading during the sizing process and thereby enhancing penetration into fiber pores. Furthermore, the prepared A-PAAS exhibited outstanding thermal stability, with a 5% weight-loss temperature (T 5% ) of 435.0 °C, which exceeds the processing temperatures of most commercially available thermoplastic resins. The work shows that the CF/PEEK composite, after sizing, exhibits effectively enhanced mechanical properties; the interlaminar shear strength and flexural strength increased by 35.0% and 59.8%, respectively, compared to the unsized composite. This work introduces non-coplanar aliphatic rings, ether bonds, and amide bonds into the sizing agent, thereby establishing a synergistic reinforcement bridge at the CF-PEEK interface. Improving the surface interfacial adhesion and wettability of CF, whilst establishing a hydrogen-bond cross-linking network within the sizing agent and PEEK, makes a key contribution to enhancing the composite's macroscopic mechanical properties. In brief, this efficient and environmentally friendly A-PAAS sizing agent provides an innovative strategy for the interfacial modification of CF/PEEK composites. Download: Download high-res image (459KB) Download: Download full-size image
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19.9
Jingzhou Wu,Mengmeng Li,Yuan Li,Di Wu,Xikai Ma,Jie Dong,Xin Zhao,Jianping Yang,Qinghua Zhang
Thermal protection in confined electronic spaces, particularly within lithium-ion battery packs, faces a persistent conflict: materials must be thin enough to maximize energy density yet robust enough to block heat propagation. To resolve this, we developed a “pearl-chain-embedded” polyimide-silica aerogel membrane via a tailored two-step gelation strategy. By strictly controlling the interfacial chemistry, we employed hydroxyl-containing polyimide chains to establish a dense hydrogen-bonding network with the in situ-grown silica. This molecular-level engineering yields a hybrid membrane that decouples flexibility from thermal stability—retaining mechanical integrity after 1000 folding cycles (bending radius: 3 mm) while suppressing the severe high-temperature shrinkage typical of pure organic aerogels. Critically, in practical safety tests, a layer merely 1 mm thick established a sufficient thermal barrier to block the chain reaction of battery thermal runaway. These findings present a robust pathway for designing ultrathin safety layers in next-generation lithium-ion batteries.
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高影响因子
POLYMER BULLETIN
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2026
·Vol. 83
·期 7
·368
·
IF 4.2
Yang Zhenghui,Guo Haiquan
The rapid development of cover sheets and backplanes in flexible active matrix organic light emitting diode (AMOLED) displays has intensified the demand for colorless polyimide (CPI) films with superior optical transparency, remarkable dimensional stability and great thermal resistance. In this study, three semi-alicyclic dianhydride monomers (HAMDA, HIMDA, TCDA) were successfully fabricated, followed by the separate polymerization with 2,2’-bis(trifluoromethyl)benzidine (TFDB) and trans-1,4-diaminocyclohexane (t-CHDA) to afford a series of colorless polyimide films. In terms of overall performance, TCDA/t-CHDA outperformed all other as-synthesized CPI films, featuring an excellent optical transmittance of 88% at 550 nm, a low haze value of 0.98 and a modest yellowness index at 2.95, alongside a reduced CTE of 17.7 ppm K − 1 and an elevated T g value of 334 ℃. Besides, TCDA/t-CHDA exhibited a robust tensile strength of 109 MPa and a remarkable elongation at break of 24%. The best overall performance of TCDA/t-CHDA was primarily attributed to the incorporation of the linear and rigid alicyclic structure as well as the formation of hydrogen bond originating from amide groups. The findings in this study provide valuable guidance for the design and fabrication of advanced colorless polyimide films targeting high-end applications.
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19.9
Xun Wang,Yin Qiao,Zesheng Song,Lirong Yang,Yang Yu,Ziye Yu,Chu Zeng,Sitong Peng,Feng Liu
Polyimide (PI) is recognized as a high-performance biomaterial membrane due to its high mechanical strength, excellent biocompatibility, biological stability, and highly tunable chemical structure. However, the intrinsic hydrophobicity of PI blood fluid contact ultrafiltration (UF) membrane materials poses risks related to separation efficiency and stability, as well as complications arising from biofouling and immune cascades. In this study, benzimidazolium-based phosphorylated zwitterionic PI (BI-ZFPI-Me/Et/ i -Pr) polymers were synthesized via polycondensation and phosphorylation using three different reagents (MeOEP, EtOEP, and i-PrOEP). These polymers were then used to prepare intrinsic flat-sheet blood-contacting UF membranes via NIPS. All phosphorylated zwitterionic PI membranes not only exhibited reduced water contact angle (19.8°/17.0°/16.8°vs. 57.2°) but also demonstrated superior UF performance, with FRR values exceeding 93% and cycle stability far surpassing that of the pristine BI-FPI membrane (76.9%). Among the three zwitterionic membranes, BI-ZFPI-Me, due to its optimal hydrophilic-hydrophobic balance, showed excellent hemocompatibility—including a hemolysis rate < 0.5%, high plasma recalcification time (28 min), and anti-complement activation—while BI-ZFPI- i -Pr exhibited the best cell viability (93.3%), enhanced endothelial cell compatibility, and promoted M2 macrophage polarization. This study indicates that intrinsic zwitterionic phosphate polyimides show promising potential in biomaterial separation membranes due to excellent multifunctional biological anti-fouling, anticoagulation, and biocompatibility.
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高影响因子
危险品化学品经营许可证（带存储）