ADVANCED FUNCTIONAL MATERIALS
·
2023
·
IF 19
Runyu Duan,Jiale Zhou,Xue Zheng,Xiaoyan Ma,Rui Zhai,Junran Hao,Yahong Zhou,Chao Teng,Lei Jiang
Ion-selective membrane embedded in a reverse electrodialysis system can achieve the conversion of osmotic energy into electricity. However, the ingenious design and development of pure polymer membranes that simultaneously satisfy excellent mechanical strength, long-term stability, high power density, and increased testing area is a crucial challenge. Here, high-strength, thin PBO nanofiber membranes (PBONM) with 3D nanofluidic channels and a thickness of 0.81 µm are prepared via a simple vacuum-assisted filtration technology. The thin PBONM exhibits excellent mechanical properties: stress of 235.8 MPa and modulus of 16.96 GPa, outperforming the state-of-the-art nanofluidic membranes. The obtained PBONM reveals surface-charge-governed ion transport behavior and high ion selectivity of 0.88 at a 50-fold concentration gradient. The PBO membrane-based generator delivers a power density of 7.7 and 40.2 W m −2 at 50-fold and 500-fold concentration gradient. Importantly, this PBONM presents excellent stability in response to different external environments including various saline solutions, pH, and temperature. In addition, the maximum power density of PBONM reaches up to 5.9 W m −2 under an increased testing area of 0.79 mm 2 , exceeding other membrane-based generators with comparable testing areas. This work paves the way for constructing high-strength fiber nanofluidic membranes for highly efficient osmotic energy conversion.
研究领域:
材料科学
·
能源科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
IET Nanodielectrics
·
2019
·Vol. 2
·期 3
·97-102
·
IF 0
Yi Chen,Zhen Kong,Wenqi Chen,Lv Xiao,Yong Yuan,Zhongquan Li,Qixin Zhuang
Graphite nanoparticles (GNPs) were introduced into poly(p-phenylene benzobisoxazole) (PBO) matrix to produce composites via in situ polymerisation. Films of various composites were fabricated through the solution casting method in methanesulfonic acid (MSA) with the help of two sand core plates. The interlayer spacing of GNPs increased slightly confirmed by XRD as a result of an expanding effect caused by continuously formed PBO chains between the graphene nanosheets of GNPs during polymerisation. Also, due to the uniform dispersion of GNPs into PBO matrix, composite films exhibited an improved tensile strength (258 MPa, 72% higher than that of pure PBO) with 5 wt% loading of GNPs fillers. The initial decomposition temperature of the composite is ∼630°C. Besides, benefitting from the interfacial polarisation in this conductive filler/polymer system, the dielectric constant of the composites with 10 wt% loading of GNPs reached 6.96, which were over two times higher than that of pristine PBO polymer (2.91).
研究领域:
材料科学
·
高分子科学
·
纳米技术
✓ 已验证
产品关联
DOI
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Zhide Liu,Bo Song,Tingting Wang,Li Wang
In this study, the interfacial properties of PBO fiber were enhanced significantly through constructing the rigid dendritic polymers on its surface. The rigid branched structure and massive functional groups of dendritic polymers endowed the interphase with more powerful physical entanglement and mechanical interlocking, abundant chemical bonding, improved interfacial compatibility and moderate mechanical properties. Compared with untreated PBO fiber composites, the interfacial shear strength and interlaminar shear strength of modified PBO fiber (PBO-M2) composites increased by 81.49 and 42.17%, respectively. Meanwhile, the impact strength raised from 68.15 to 103.28 kJ/m 2 due to the construction of rigid dendritic polymers. Dynamic mechanical evaluation also indicated that the storage modulus (at 30 °C) of PBO-M2 composites increased from 34 ± 2 to 47 ± 3 GPa. Moreover, the hydrothermal aging resistance of PBO-M2 composites was also markedly improved.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2020
·
IF 4.469
Yizi Chen,Dongwei Xu,Hongfang Qiu,Ping Chen
Grafting modification is an effective means to improve the interfacial bonding properties of fibre composites. In this study, a series of grafted poly( p -phenylene benzobisoxazole)-polyurethane (PBO-PU) fibres were fabricated using online continuous air plasma treatment. The resulting PBO-PU fibres were characterised using attenuated total reflection Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy and scanning electron microscopy. The results of interlaminar shear strength (ILSS) tests show that all the PBO-PU fibre reinforced epoxy resin composites exhibited superior interfacial adhesion properties compared with the untreated composites, and the ILSS reached 48.0 MPa, indicating an improvement of 99.49 %. Our findings demonstrate that plasma grafting provides the possibility to realise industrial production of PBO/epoxy composites exhibiting high interlaminar shear strengths.
研究领域:
材料科学
·
复合材料工程
✓ 已验证
产品关联
DOI
高影响因子
FIBERS AND POLYMERS
·
2025
·
IF 2.3
Zhang Sheng,Wu Bingjie,Song Bo,Chen Tao,Li Qing,Wu Guangshun,Chen Lei
When a spacecraft works in low earth orbit, PBO fiber/epoxy resin composite as structural material not only has the poor interfacial properties, but also faces the attack of atomic oxygen (AO). To solve the two drawbacks, a PBO fiber hierarchical reinforcement has been fabricated without degrading the fiber by a mussel-inspired "two-step" method based on dopamine (DA) assistant co-deposition and chemical grafting technologies. The surface wettability, roughness (Ra) and reactivity of the obtained PBO@PDA-Si-GO are increased significantly in comparison with those of untreated one. The reinforcement offered simultaneously remarkable enhancement in interfacial shear strength (IFSS) and AO erosion resistance of the composites, which laid theoretical and experimental foundations for the realization of the structure/function integration design of advanced composites.
研究领域:
材料科学
·
航天工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES COMMUNICATIONS
·
2018
·
IF 0
Yusheng Tang,Wencai Dong,Lin Tang,YiKun Zhang,Jie Kong,Junwei Gu
Functionalized poly ( p -phenylene-2, 6-benzobisoxazole) ( f -PBO) fibers were firstly obtained by introducing polydopamine (PDA) and 3-GlycidoxypropyltriMethoxysilane (KH-560), then performed to fabricate the f -PBO fibers/fluoride-containing bisphenol A dicyanate ester ( m -BADCy) wave-transparent laminated composites . PDA was coated on the surface of PBO fibers and KH-560 was also grafted onto the PBO fibers. And the single fiber pull-out strength of the f -PBO fibers/ m -BADCy micro-composites was increased from 3.2 MPa (PBO fibers/BADCy) to 4.0 MPa. Interlaminar shear strength (ILSS) and flexural strength of the f -PBO fibers/ m -BADCy composites was also enhanced to 49.5 MPa and 652.2 MPa, increased by 39.8% and 12.1%, compared with that of PBO fibers/BADCy composites (ILSS of 35.4 MPa and flexural strength of 582.0 MPa), respectively. The corresponding ε and tanδ was decreased to 2.86 and 5.7 × 10 -3 , declined by 6.5% and 23.0%, compared with that of PBO fibers/BADCy composites ( ε of 3.06 and tanδ of 7.4 × 10 -3 ), respectively.
研究领域:
材料科学
·
复合材料工程
✓ 已验证
产品关联
DOI
Energetic Materials Frontiers
·
2022
·
IF 0
Guang-pu Zhang,Yu-hang Cheng,Miao-miao Li,Lei Xiao,Hu Guo,Wei Jiang,Ga-zi Hao
In this study, CuO–Cr 2 O 3 –PbO ternary nanocomposites (TNCs) with different atomic ratios of Cu:Cr:Pb (5:2:8, 5:4:6, 5:6:4, 5:8:2) were synthesized by means of efficient mechanical milling. As confirmed by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), energy dispersive X-ray spectroscopy (EDS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM), uniform and impurity-free CuO–Cr 2 O 3 –PbO TNCs with an average grain size of 30 nm were successfully obtained. The catalytic properties of CuO–Cr 2 O 3 –PbO TNCs favorable for the pyrolysis of ammonium perchlorate (AP) were studied through thermogravimetric (TG) analysis and differential scanning calorimetry (DSC). The results show that TNC-8, which has an atomic ratio of 5:8:2 (Cu:Cr:Pb), exhibited the highest catalytic activity for the pyrolysis of AP when the pyrolytic temperature of AP decreased from 441.3 °C to 360.2 °C and the Gibbs free energy ( Δ G ≠ ) decreased from 199.8 kJ·mol −1 to 175.2 kJ·mol −1 , as compared to CuO–Cr 2 O 3 –PbO nanocomposites with other atomic ratios.
研究领域:
材料科学
·
催化化学
✓ 已验证
DOI
POLYMER
·
2021
·
IF 4.43
Lei Chen,Gangyan Zhang,Guangshun Wu,Peng Wang,Yuanming Zhang,Minghua Li,Qing Li,Tonghua Zhang
The surface of poly( p -phenylene benzobisoxazole) (PBO) fibers was modified by a hybrid coating composed of polydopamine (PDA) and the hydrolysis products of 3-aminopropyltrimethoxysilane (KH551) using a facile and environment-friendly mussel-inspired co-deposition strategy. The surface morphologies and chemical composition of the obtained hierarchical reinforcement (PBO@PDA/Si) were measured for confirming the successful deposition of the coating. Compared to untreated PBO fiber, the surface roughness and wettability of PBO@PDA/Si were increased remarkably. Importantly, PBO@PDA/Si showed a 50.2% increase in the interfacial shear strength (IFSS) of resulting composite without any decrease in its tensile strength (TS). In addition, its atomic oxygen (AO) erosion and hydrothermal aging resistances were significantly improved. The “one-step” mussel-inspired surface modification strategy starts from simple chemistry and cheap raw materials, and may provide a novel and versatile design for fabricating multifunctional hierarchical reinforcements.
研究领域:
材料科学
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 19
·8701-8713
·
IF 4.682
Gao Yufu,Wu Shaohua,Li Chuncheng,Xiao Yaonan,Liu Jiajian,Zhang Bo
Poly(p-phenylene benzobisoxazole) (PBO) fibre-based specialty paper has become a promising candidate for high-performance insulating materials due to the remarkable properties of PBO fibres. However, the porous structure and poor interfacial interaction of PBO paper seriously weaken its mechanical strength and greatly limit its practical application. Herein, proposed for the first time, a homogeneous reinforcement strategy is developed to regulate the microstructure of PBO paper and efficiently enhance its overall properties. For this reason, flexible ortho-hydroxy polyamic acid (HPAA) was first synthesized and used to impregnate PBO paper. Subsequently, HPAA was thermally converted into a benzoxazole-containing resin, manifesting excellent interfacial compatibility with PBO paper. As a result, the compact structure and solid interface endow the composite paper with impressive performance. The tensile strength, modulus, and electrical breakdown strength of the composite paper are 116.86 MPa, 5.47 GPa, and 63.7 kV mm −1 , respectively, increasing by 33.1, 8.1, and 1.1 times compared with those parameters of the original paper (3.43 MPa, 0.60 GPa, and 30.5 kV mm −1 ). Moreover, the composite paper also exhibits an ultra-low dielectric constant and loss tangent (1.6 and 0.004 at 10 6 Hz, respectively), as well as superhigh thermal stability (maximum decomposition temperature, T max ≈ 600 °C) due to the elaborate design of the structure. Thus, the mechanical strength has been successfully integrated with the outstanding insulation and thermal properties, rendering the lightweight PBO composite paper promising in the field of high-temperature and high-voltage electrical insulation. Graphical abstract
研究领域:
材料科学
·
电气工程
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Chemistry
·
2021
·
IF 8.301
J. Zeng,H. Kong,X. Du,Q. Xu,F. Jiang,B. Li,M. Yu
PBO fiber is one of the most promising reinforcements in resin matrix composite because of its excellent mechanical properties . However, the inert and smooth surfaces make it the poor interface adhesion with resin matrix, which seriously limits the application in composites. In this article, we report a method to modify the surface of PBO fibers with 2,2-Bis (3-amino-4-hydroxyphenyl) hexafluoropropane（BisAPAF）in supercritical CO 2 to enhance interfacial properties . Chemical structures , surface elemental composition and functional groups, and surface morphology were characterized by FT-IR spectrometer, X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM), respectively. The mechanical properties of the samples were tested by a tensile tester. Static contact angle and microdebonding tests were used to characterize the wetting ability and interfacial shear strength (IFSS) of the fiber and epoxy resin. The results showed that the BisAPAF could be solved in scCO 2 and introduced more groups, –NH 2 , –OH, and –CF 3 on the fiber surface, resulting in the mechanical properties and the wettability of PBO fiber slightly improved. Moreover, the fiber surface roughness was also increased obviously. The IFSS between the modified PBO fiber and epoxy resin increased from 8.18 MPa to 31.4 MPa when the treating pressure was 14 MPa. In general, the method to modify PBO fibers surface using BisAPAF in scCO 2 can effectively improve their interfacial properties.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Zhaorui Meng,Weihua Zhong,Dianbo Zhang,Qun Liu,Zhaoshuo Wang,Yandong Ma,Shichao Lu,Xu Hu,Tianying Sun
In extreme environments, it is difficult to balance the strength and toughness of ultra-thin film materials. To address this problem, we propose a promising strategy to build ultra strong, tough and extreme environments resistant Poly(p-phenylene-2,6-benzobisoxazole) (PBO) papers with a nacre-like structure constructed by synergistic electrostatic interaction and interlayer entanglement through the sol–gel-film method and hot press orientation. Highly interconnected PBO nanofibres （PNFs） with positive charges are tightly wound around the anisotropic graphene oxide (GO) nanosheets with negative charges through strong electrostatic interaction, forming a nacre like microstructure. The addition of Fe (Ⅲ) can form a coordination bond with the amino group on PNFs. Chemical crosslinking and hydrogen bonding synergize with interlayer entanglement effect among different PNFs，which can effectively dissipate interlayer energy and alleviate the conflict between strength and toughness. The resultant tensile strength and toughness are as high as 338.3 MPa and 16.04 MJ/m 3 ，which are 197.7 % and 425.4 % of those of the intrinsic PBO paper, respectively. Additionally, after 5000 folding-unfolding cycles, the tensile strength retention and toughness retention of the PBO/GO/Fe (PGFe) paper were still 85.4 % and 71.9 %, respectively. Moreover, the paper exhibits excellent tolerance to extreme temperature environments and showed extremely strong chemical stability.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Guanjie Xing,Min Huang,Simeng Hao,Chuansheng He,Xiaohong Li,Louzhen Fan,Yunchao Li
To obtain high-capacity electrode materials and meanwhile actualize the reuse of scrap lead paste, a novel alkylamine-mediated thermolysis route is proposed herein for one-pot preparation of high-quality PbO nanomaterials , relying on the thermal decomposition of lead carboxylate in hot solvent in the presence of hexadecylamine (HDA). This synthetic route allows us to produce uniform PbO nanowires with a diameter of 7.1 nm and a length beyond 10 μm, and nanosheets and nanorings with a lateral size of ca. 310 nm on a gram scale, by simply tuning the alkylamine content or reaction time. In particular, we have employed various means to unveil the key role of HDA, i.e., precursor activation and surface passivation function, in the controlled preparation of such PbO nanomaterials. Impressively, when serving as the positive active materials for lead acid batteries (LABs), the anodes based on PbO nanowires displayed an excellent discharge performance: its discharge capacity and active material utilization ratios could reach 164.3 mA h/g and 68.5% respectively even at a discharge current density as high as 50 mA/g, which are superior to most of the previously-reported values. Such an excellent discharge performance was speculated to result from the synergization effect of the large ECSA, small charge transfer resistance and highly active exposed facets associated with the PbO nanowires.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）