COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Xiujuan Liu,Na Li,Tianyue Zhao,Qing Li,Zihe Lu,Ze Chen,Bo Feng,Tifeng Jiao
The Langmuir-Blodgett (LB) technique can be used to obtain highly ordered arrangement and assembly of high polymer molecular chains , and the obtained LB films exhibit the controllable structures and special physicochemical properties . Here, we successfully prepared the composite LB films based on bisphenol fluorene (BPF) and epoxy bisphenol fluorene (DGPF) by LB technique, as well as explored the microstructures of the composite LB films by atomic force microscopy (AFM) and transmission electron microscopy (TEM). The different aggregation states of various dye molecules in the composite LB films are investigated by UV–vis. Interestingly, the composite LB film electrodes exhibit promising photoelectrochemical properties. In particular, BPF/MB and DGPF/MB LB films show better photoelectric conversion efficiency. It is attributed to the ordered arrangement of BPF and DGPF and their effective aggregation with dye molecules, which improves the light absorption ability and charge transfer efficiency of the materials. Therefore, the prepared LB films based on the synthetic polymers BPF and DGPF are expected to play an important role in microelectronics.
研究领域:
材料科学
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物理化学
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微电子学
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DOI
高影响因子
HIGH PERFORMANCE POLYMERS
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2023
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IF 2.1
Huanhuan Gao,Xiaozhou Zhang,Xigao Jian,Jinyan Wang
In this study, the melt polycondensation reaction of 9,9’- bis(4-hydroxyphenyl)fluoride (BHPF) and diphenyl carbonate (DPC) was catalyzed using three ionic liquids (ILs) and a conventional alkali metal as catalysts. The optimal IL catalysts were determined to be [BMmim][BF4] ionic liquid catalysts, and the catalytic mechanism was investigated. Furthermore, the optimum process conditions were identified: the optimal amount of [BMmim][BF4] was 0.05 mol% based on DPC, the polycondensation temperature was set at 200°C for a duration of 3 h, followed by polymerization at 280°C for another 3 h. As a result, the Mn value of poly(9,9-bis(4-hydroxyphenyl) carbonate) (PFC) reached up to 41387 g/mol with a glass transition temperature band of approximately 254°C and Td-5% value of around 436°C.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
RSC Advances
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2024
·Vol. 14
·期 25
·17771-17779
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IF 3.9
Tao Lu,Wei Fang,Qian Zhou,Mengjuan Liu,Guozhang Wu
This study aims to synthesize a specific type of polycarbonate with high refractive index, low birefringence, and resistance to hygrothermal aging by copolymerizing 2,2′-bis(2-hydroxyethoxy)-1,1′-binaphthyl (BNE) with 9,9-bis[4-(2-hydroxyethoxy)phenyl]fluorene (BPEF). Comparative analysis revealed that the copolymer synthesized from BNE and BPEF demonstrated superior hydrolytic stability relative to the bisphenol A-based polycarbonate. This augmented stability can be attributed to the monomers' higher pKa values, rendering acidic substances less capable of dissociating and thereby mitigating ester hydrolysis under hygrothermal conditions. Furthermore, the investigation probed into the phenomenon of physical aging in copolymerized polycarbonate when exposed to hygrothermal environments. It was discerned that the enthalpy loss, observable under both dry and hygrothermal conditions, could be linearly correlated with the difference between the aging temperature and the glass transition temperature (Tg), signifying a close correlation between the magnitude of physical aging and Tg. A lower Tg in the copolymerized polycarbonate led to more pronounced physical aging within the same timeframe, resulting in an augmentation of tensile strength and modulus, while higher Tg effectively mitigated the physical aging phenomenon.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
Polymers
·
2022
·Vol. 14
·期 18
·3904
·
IF 4.967
Xin Liu,Xiaozhou Zhang,Jiawei Jiang,Hongge Jia,Xigao Jian,Jinyan Wang
Polyether ketone (PEK) plastics are linear thermoplastic polymers connected by at least one ether bond and at least one ketone bond on the aryl group. The reason for their excellent heat resistance, rigidity, and mechanical strength is that their main molecular chain contains plenty of aromatic rings and polar carbonyl groups, and their molecular chain presents a large rigidity and strong intermolecular force. In addition, the main chain contains a considerable number of ether bonds, resulting in a certain toughness. However, polyether ketone materials have the disadvantage of poor solubility because of their excellent rigidity. To improve the solubility of polyether ketone, the preparation method of a novel nitrogenous heterocyclic polyaromatic ether monomer, 2-(4-chlorophenyl)-2,3-dihydrophthalazine-1,4-dione (CDD), was proposed, and its activity of polymerization was studied. The average molecular weight of the poly(aryl ether ketone) containing a nitrogenous heterocyclic polyaromatic ether group obtained by self-polycondensation of CDD was 4.181 × 103kg/mol, and the yield was 90.5%. In order to further explore the activity of monomers, novel copolymerized poly(aryl ether ketone) (PBCD) containing a nitrogenous heterocyclic polyaromatic ether structure was prepared by ternary copolymerization with 4,4-difluorobenzophenone (DFBP) and bisphenol fluorene (BHPF) with high activity. The average molecular weight of PBCD was 72.793 × 103kg/mol, the molecular weight distribution was 2.344, and the yield was 88.1%. Fourier transform infrared spectroscopy (FT-IR) and1H NMR were used to confirm the structure of the obtained polymer. Through thermogravimetric analysis (TGA), the determined weight loss temperature of 5% under nitrogen was higher than 500 °C, indicating excellent thermal stability. Compared with the solubility of the binary copolymer containing fluorenyl poly(aryl ether ketone) (PBD), the polymer showed reasonable solubility in selective solvents such as chloroform andN,N-dimethylacetamide.Keywords:poly(aryl ether ketone);solubility;thermal properties
研究领域:
高分子科学
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材料科学
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化学工程
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Yuyang Wang,Yao Tian
Designing and developing a uranium adsorbent with high adsorption capacity and good selectivity is highly significant. We synthesized a novel hyper-cross-linked polymer adsorbent with bifunctional groups, (PHCP-4-AO), such as phosphate and amidoxime groups, via simple Scholl reaction and subsequent functionalization for the first time highly efficient extraction of U(VI) from aqueous solution. Due to its unique molecular structure design, it can enhance the selectivity and adsorption capacity of uranium by using two different functional groups. The maximum uranium adsorption capacity of PHCP-4-AO was 424.33 mg/g, which was higher than the single-functional group phosphorylated (PHCP-4) (315.43 mg/g) and amidoximated (HCP-4-AO) (260.38 mg/g) adsorbents. The combination of phosphate and amidoxime groups improves the adsorption effect. PHCP-4-AO has good selectivity and affinity for uranyl ions. In simulated wastewater, the K d of PHCP-4-AO for uranium was 7266.3 mL/g, which was more than 15 times that of other ions. After three adsorption–desorption cycles, the adsorption capacity of PHCP-4-AO can still be maintained above 300.00 mg/g. Through XPS analysis, it is speculated that the sorption of uranium by PHCP-4-AO is owing to the lone pair electrons found on the oxygen atom of the phosphate groups, as well as the oxime oxygen and amino nitrogen atoms of the amidoxime groups entering the uranium’s empty orbit to form the coordination bonds. These findings demonstrated that this new hyper-cross-linked polymer could be considered as a valuable material in the extraction and recovery of uranium from uranium-containing aqueous solutions.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
POLYMER
·
2025
·
IF 4.5
Junji Wei,Zeyue Zhang,Zexing Zhang,Runlin Lu,Jinbiao Pang,Shifeng Yuan,Liang Fang,Li Duan,Jian Liu
For decades, high-performance epoxy resins have been pivotal in advancing high-temperature electronic materials. Conventional epoxy resins tend to soften and deform under high-temperature conditions, which compromises their structural stability and fails to meet the stringent thermal reliability requirements of high-temperature processes and equipment. Regarding this, this study presented two new kinds of fluorene-based epoxy monomers bisphenol fluorene epoxy resin (BFEP), isopropyl bisphenol fluorene epoxy resin (IBFEP) and a novel curing agent (1,3-bis(4-aminophenyl) adamantane, AMA) derived from adamantane. The two monomers were cured with two hardeners, 4,4-diaminodiphenyl sulfone (DDS) and AMA, respectively. The DDS cured resins showed high glass transition temperature (BFEP/DDS, 236 °C; IBFEP/DDS, 209 °C), excellent storage modulus, good thermal stability ( T d5% >395 °C) and dimensional stability, low water absorption and good adhesion. However, the dielectric constant (κ) of those two resins were relatively high, e.g. 4.6 was for BFEP/DDS, 4.23 was for IBFEP/DDS at 10 MHz. Compared with DDS system, both resins exhibited a lower glass transition temperature ( T g ) after cured by AMA. However, the latters also possessed a notably high storage modulus at room temperature (RT) (BFEP/AMA, 4420 MPa; IBFEP/AMA, 4630 MPa), lower dielectric constant (BFEP/AMA, 4.05; IBFEP/AMA, 3.74 at 10 MHz), better adhesion and thermal conductivity. In summary, the two kinds of fluorene-based epoxy resins cured with different curing agents exhibited different performance characteristics. The performance of AMA cured epoxy resin exhibited more balanced behaviors due to its excellent rigid and hollow structure, which could be suitable for high- T g PCB substrate materials.
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DOI
高影响因子
ACS Applied Polymer Materials
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2024
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IF 4.4
Kuirong Feng,Lingxin Meng,Jingmei Xu,Pengyun Zhao,Na Li,Jinxuan Lei
In this paper, UiO-66-NH2 was successfully modified with a phosphate group by a Schiff base reaction. The phosphate and amine bifunctionalized UiO-66-NH2 (PUIN) was successfully prepared. A series of composite membranes were prepared by adding PUIN fillers to sulfonated poly(aryl ether ketone sulfone) (FSPUIN-X) containing fluorene groups. The introduction of PUIN containing both phosphate and amino bifunctional groups increased the number of proton transport sites within the membrane and facilitated the construction of continuous proton transport channels. The addition of PUIN resulted in a significant increase in the proton conductivity of FSPUIN-X due to the introduction of more proton transport sites. The conductivity of FSPUIN-5 (174.22 mS cm–1) was 1.46 times higher than that of pure membranes (119.32 mS cm–1) at the same condition. And the open-circuit voltage and power density of FSPUIN-5 also reached 0.957 V and 0.54 W cm–2, respectively. The structure and morphology of PUIN and membranes were characterized by Fourier infrared (FT-IR), X-ray polycrystalline diffraction (XRD), nuclear magnetic resonance hydrogen spectrum (1H NMR), and scanning electron microscopy (SEM). Meanwhile, the PUIN also strengthened the mechanical properties of FSPUIN-X series membranes. All of the results indicated that the introduction of phosphate and amine bifunctionalized UiO-66-NH2 promoted the comprehensive performance of the composite membranes.
研究领域:
材料科学
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能源科学
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产品关联
DOI
高影响因子
POLYMER TESTING
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2024
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IF 5
Lingmei Jiang,Guangsheng Zhang,Kuanyu Yuan,Chenghao Wang,Haoran Liu,Changhong Xiao,Hao Sun,Xiaoxu Wang,Lishuai Zong,Jinyan Wang,Xigao Jian
Organic polymer materials with low dielectric properties have garnered significant attention due to their convenient preparation process, low cost, and commendable mechanical properties. Such polymers, especially with heteromorphic structures, exhibited great potential for future electronic devices and antennas, particularly accompanied with rapid manufacturing technologies like three-dimensional (3D) printing. In this study, a series of new allyl ether-ended hyperbranched fluorene-based polyaryletherketone ( hb -PFAEK-Allyls) were developed. The content of allyl ether photosensitive groups and molecular weight were controlled by adjusting the molar ratio of OH:F loading. UV-curable resins were then prepared through blending between hb -PFAEK-Allyls with trimethylolpropane triacrylate (TMPTA) and ethylene glycol bis(3-mercaptopropionate) (EGBMP), resulting in thiol-allyl-acrylate ternary UV-cured system. The influence of molecular weight of the hyperbranched polymers on the thermal performance, mechanical properties, and dielectric properties of the UV-cured films was systematically investigated. The results show that due to the introduction of hyperbranched structure with high molecular weight, the T g of the UV-cured film can reach up to 248 °C. Due to the increased molecular free volume in the hyperbranched structure, the dielectric constant of the UV-cured film can be reduced to as low as 2.74 at 1 GHz. Due to the design of thiol-allyl-acrylate ternary UV-cured system, the cured film has excellent mechanical properties, with the highest tensile strength of 61.0 MPa and the elongation at break of 7.0%. This study represents innovative progress on integrating fully aromatic-based photosensitive hyperbranched polyaryletherketone into UV-curable resin architecture. Overall, the herein hb -PFAEK-Allyls-based photosensitive resins exhibit outstanding comprehensive performance and holds great potential for application in advanced 3D printing technology.
研究领域:
材料科学
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高分子化学
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电子工程
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产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
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2026
·
IF 6.1
Jinglin Chen,Xiaoying Feng,Tingting Tu,Chunying Wei,Yongsheng Cui,Juan Zheng,Gangfeng Ouyang
Background The increasing concern surrounding environmental pollution necessitates effective monitoring of emerging organic pollutants, especially for bisphenol compounds (BPs). These compounds are prevalent in various industries and have been detected in trace amounts across different ecosystems, raising significant health concerns. Current monitoring techniques often rely on extensive use of extraction solvents, large sample sizes, and expensive materials. Therefore, there is a pressing need for the development of cost-effective, stable, and eco-friendly pretreatment methods to enhance monitoring efficiency. Results A novel biochar from Gynostemma pentaphyllum , designated PBAGB, synthesized through a waste-to-wealth strategy that integrates K 2 CO 3 activation, ball-milling, and plasma treatment. This innovative approach resulted in a biochar with high specific surface area, abundant oxygen-containing functional groups, and numerous defect sites. The modifications significantly enhanced the active sites available on PBAGB, which was then employed as a solid-phase microextraction (SPME) fiber for extracting bisphenols (BPs). Compared to commercial fibers, the PBAGB-coated fiber demonstrated excellent stability, improved extraction performance, and lower production cost. Coupled with ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS), the method achieved good linear ranges (5–5000 ng L −1 ), low detection limits (0.39–2.9 ng L −1 ), and satisfactory relative recoveries (80.4–119.9%), allowing for efficient determination of BPs in 21 marine samples from the Beibu Gulf. Significance The work presents a more sustainable, practical, and effective sample pretreatment technique utilizing direct-immersion SPME (DI-SPME) coupled with UPLC-MS/MS for environmental monitoring of trace BPs in Beibu Gulf, following a waste-to-wealth strategy. It emphasizes the practical application of PBAGB-coated fibers in extracting BPs and assessing the ecological risks posed by trace BPs.
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DOI
PubMed
高影响因子
RENEWABLE ENERGY
·
2025
·
IF 9.1
Fenglong Chen,Lingxin Meng,Jingmei Xu,Hongqi Liang,Kuirong Feng,Tian Lan,Jiayin Wang,Qingyuan Shi
The sulfonated poly(arylene ether ketone sulfone)s which contains fluorenyl groups (F-SPAEKS) as proton exchange membranes (PEMs) matrix is prepared. UiO-66-NH 2 -PO 4 H 2 (PUIN) is synthesized based on UiO-66-NH 2 as a template for immobilizing phosphate groups onto MOFs by chemical bonding via Schiff base reaction. UiO-66-SO 3 H-PO 4 H 2 (SPUIN) is prepared via ring-opening of 1,3-propanesulfonolactone, where -SO 3 H is introduced at the -NH 2 site of PUIN. The hybridized PEMs (FSSPU-X) are obtained by adding SPUIN as fillers into F-SPAEKS polymers. From all prepared PEMs, FSSPU-7 which means the weight ratio of SPUIN is 7% shows the best performances in comprehensive aspects. The H + conductivity of FSSPU-7 is enhanced to 247.38 mS cm -1 and the peak power density is 1140 mW cm -2 with 0.48 mg cm -2 Pt/C loading. At the same time, the swelling ratio of FSSPU-7 remains below 17%. Besides, FSSPU-7 has a maximum tensile strength up to 32.37 MPa. And the proton conductivity of FSSPU-7 is consistently maintained at about 240 mS cm -1 after 144 hours of long-term stability test. Therefore, the preparation of PEMs with a high level of performance is expected by introducing phosphoric acid and sulfonic acid bi-functionalized UiO-66 into F-SPAEKS.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
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2025
·Vol. 32
·期 12
·471
·
IF 2.8
Luo Shajie,Wang Yuan,Zhang Shuai,Zhou Jun,Wang Jiale,Wang Xiaohan,Jiang Lishi
Two kinds of novel poly(arylene ether nitrile) copolymers (P-HFD and P-PFD) containing pendant aliphatic rings and fluorene groups were synthesized by 4, 4’-cyclohexane-1, 1’-diyldiphenol (CHDP) or 4, 4’-cyclopentane-1, 1’-diyldiphenol (CPDP), 4, 4’-(9-fluorenylidene) diphenol and 2, 6-dichlorobenzonitrile (DCBN) in this work. The inherent viscosities of these two copolymers were 0.455 and 0.576 dL/g. The copolymers P-HFD and P-PFD exhibited good thermal property, the glass transition temperatures (T g ) were 202.2–214.9 °C, and the weight-loss temperatures (T 5% ) were 421.3–433.5 °C. The polymers’ films had good tensile strengths of 27.3–38.6 MPa. The result of dissolution experiment showed that the copolymers could be dissolved in some solutions at room temperature, such as NMP, DMF and CH 2 Cl 2 , implying they had good solubility, they can be processed by the solution method. Additionally, the optical transmittances of these two copolymers were 68.3–76.3% at 450 nm, indicating that they have the potential to be applied as the heat-resistant optical films.
研究领域:
高分子化学
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材料科学
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有机合成
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高分子物理
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产品关联
DOI
高影响因子
POLYMER
·
2025
·
IF 4.5
Yang Yang,Bo Jiang,Haodong Liu,Ting Zhao,Chang Yu,Boyin Yang,Hong Gao,Xuefeng Li,Yingshuang Shang,Haibo Zhang
Additive manufacturing of poly ether ether ketone (PEEK) is increasingly used to produce complex three-dimensional (3D) products, but controlling interlayer performance remains challenging. To address this, we synthesized a series of rigid fluorene-containing amorphous polymers by systematically modulating the molar ratio of resorcinol to bisphenol fluorene with varying compatibility with PEEK. These polymers were then blended with PEEK to investigate the compatibility effects on interlayer properties. A relationship among interlayer strength and the diffusion and entanglement of polymer chains was established. Isothermal crystallization studies revealed that blending with amorphous polymers extends the crystallization time of PEEK and enhances interlayer healing, thereby improving interlayer strength. Atomic force microscopy-infrared tests confirmed the accumulation and diffusion of amorphous and partially compatible fluorene-containing polymers at the interface of the blends, which enables the best-performing blends to have three times the interlayer strength of pure PEEK. These findings provide valuable insights into the molecular chain dynamics during printing, supporting the development of materials with optimized interlayer properties.
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DOI
高影响因子
危险品化学品经营许可证（带存储）