HIGH PERFORMANCE POLYMERS
·
2020
·
IF 1.568
Xing-Hua Guan,He-Ran Nie,Hong-Hua Wang,Ji-Yong Zhao,Zhi-Peng Wang,Rui Wang,Bao-Feng Liu,Guang-Yuan Zhou,Qiang Gu
A series of aromatic polyesters bearing fluorene and phthalein groups were synthesized from commercially available 9,9-bis(4-hydroxyphenyl)fluorene (BPF), phenolphthalein, and terephthaloyl chloride through an interfacial polymerization method. The microstructure, molecular weight, morphology, thermal properties, and thermal decomposition mechanism of these aromatic polyesters were investigated. Their mechanical properties were also evaluated. The results suggested that the copolymer compositions were approximately equal to the feed compositions. Moreover, the increase in the BPF unit content increased the glass transition and weight loss temperatures of the aromatic polyesters, owing to the strong rigidity of the bulky fluorene group. All the polymers were amorphous and exhibited good solubility in common organic solvents. Hence, the synthesized polymers could be easily cast into flexible films. The copolymer film samples exhibited better mechanical properties than those of the homopolymers. The tensile strength, Young’s modulus, and elongation at break of the polymers first increased gradually, and then decreased with increasing BPF content. Notably, the copolymers exhibited the best mechanical properties at the BPF content range 30–50%. Owing to their characteristics, these synthesized polymers show great potential for application as high performance membrane materials.
研究领域:
材料科学
·
高分子化学
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DOI
高影响因子
HIGH PERFORMANCE POLYMERS
·
2025
·
IF 1.6
Zihao Wu,Jian Wang,Jiaxin Liu,Jinhua Lei,Heran Nie,Qiliang Yuan,Zhipeng Wang,Liang Li
Aromatic polyesters are an attractive class of engineering thermoplastics with excellent chemical properties, thermal stability and environmental stability, as well as good optical properties, but they have rarely been reported. Refractive index (RI) is one of the properties commonly used to compare the optical properties of materials. The higher the refractive index, the thinner the lens made of the corresponding material; however, the preparation of high-refractive-index polymers is currently a thorny issue, in which the structure of the polymer molecules has a great impact on their refractive index, to design high-refractive-index materials requires starting from the structure of the molecules. Phenolphthalein has a unique structure with a molecular skeleton consisting of three benzene rings and a cyclic lactone that exhibits a twisted non-coplanar structure. This cyclic side group can hinder the accumulation between the polymer molecular chains, not only improving the solubility of the polymer molecules, but also increasing the transparency of the polymer films. In this work, we used phenolphthalein (PHT) and its derivatives to polymerize with terephthaloyl chloride (TPC), respectively, through the structural differences between them, the influence of polymer structure on the refractive index and thermal properties was discussed. Among them, polyester PAR-NPHT had the highest refractive index (nd>1.67), and is expected to be a new generation of optical materials.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Chaoqun Tan,Xinchi Jian,Haotian Wu,Tianyu Sheng,Kechun Sun,Haiying Gao
Kinetic degradation of phenacetin (PNT) by solar activated persulfate (PS) system was evaluated in study. The decomposition of PNT well fitted with a pseudo-first order kinetic pattern, and the exceptional removal performance towards PNT (100%) was obtained in the presence of solar irradiation (1.14 × 10 -4 E· m −2 · s −1 ) and 0.3 mM PS at pH 7.0 in 10 min. The consume ratios of persulfate were calculated to be 2.3~16.7%. The steady-state concentrations of hydroxyl radicals ([HO*] ss ) and sulfate radicals ([SO 4 - ·] ss ) were calculated to be (2.41~2.59) × 10 -13 M and (3.75~4.06) × 10 -12 M by probes of nitrobenzene (NB) and benzoic acid (BA), respectively. The contribution of HO* and SO 4 - · accounts for 27.4% and 11.0% in degradation of PNT. The formation of typical trihalomethanes (THMs) after pre-oxidation of solar/PS was evaluated. The concentration of total THMs decreased from 16 μg·L -1 to 15.4 μg·L -1 through pre-oxidation, with cytotoxicity decreased from 1.38 × 10 -5 to 1.27 × 10 -5 . The calculated electrical energy per order (EE/O) in solar/PS were in range of 0.069~0.106 kWh/m/order.
研究领域:
环境科学
·
化学工程
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产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2016
·
IF 6.333
Ao Nan Lai,Dong Guo,Chen Xiao Lin,Qiu Gen Zhang,Ai Mei Zhu,Mei Ling Ye,Qing Lin Liu
Development of anion exchange membranes (AEMs) with high hydroxide conductivity, good dimensional and alkaline stabilities is still a challenge for the practical application of AEM fuel cells. In this study, we report a new strategy to prepare high-performance AEMs with crosslinked ionic regions. A series of phenolphthalein-containing poly(arylene ether sulfone)s crosslinked AEMs was synthesized by grafting ion groups selectively and densely on the phenolphthalein units to form ion clusters that are further crosslinked to generate the hydrophilic ionic regions. The crosslinking reaction not only improved the dimensional stability of the AEMs, but also increased the aggregation of the ion clusters leading to the formation of hydrophilic/hydrophobic phase-separated morphology and ion-conducting channels. As a result, enhancements in both ion conductivity and dimensional stability can be achieved. The crosslinked AEMs showed high hydroxide conductivities in the range of 52.2–143.4 mS cm −1 from 30 to 80 °C and a superb ratio of relative conductivity to relative swelling at 80 °C. Furthermore, the crosslinked AEMs also exhibited good mechanical properties , thermal and alkaline stabilities and desirable single cell performance. This work presents a promising strategy for the synthesis of high-performance AEMs for fuel cells.
研究领域:
材料科学
·
能源工程
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Yu-qiong Gao,Jin-qiang Zhou,Jia Zhang,Cong Li,Nai-yun Gao,Da-qiang Yin
The pollution of aquatic bodies in the natural environment by pharmaceuticals has become a matter of increasing concern. In this study, we investigated the effects of the various influencing factors on the degradation of phenacetin (PNT) and its disinfection byproduct formation potentials (DBPFPs) by UV/persulfate (UV/PS) treatment. We first examined the effects of factors such as the PS concentration, pH, HCO 3 – , NO 3 – , NO 2 – , and natural organic matter (NOM) on the PNT degradation kinetics. The PNT degradation rate exhibited a positive correlation with the PS concentration. The PNT degradation rate was also pH-dependent, and it was highest under mild-alkalinity conditions. The presence of NO 3 – , NO 2 – , and NOM all inhibited PNT degradation, whereas HCO 3 – slightly accelerated PNT degradation. We next adopted LC/MS/MS to identify the degradation products of PNT, and the possible degradation pathways were proposed accordingly. The effects of UV/PS pretreatment on the DBPs from chlorination exhibit a close relationship with the abovementioned factors influencing the PNT degradation performance. Upon prolonging the pretreatment time and increasing the PS concentration, it was observed that trichloromethane (TCM) formation continuously decreased, while dichloroacetonitrile (DCAN) and trichloronitromethane (TCNM) exhibited patterns of increase and subsequent decrease in concentration. Mild alkalinity enhanced TCM formation and largely restrained DCAN and TCNM formation. Additionally, the presence of NOM enhanced TCM formation, while HCO 3 – hardly affected DBP formation. Meanwhile, NO 2 – profoundly affected the formation of TCNM. Therefore, these factors influencing PNT degradation by UV/PS should be carefully considered when integrating such technology as an alternative pretreatment for PNT-polluted water before disinfection.
研究领域:
环境科学
·
水处理工程
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Hongye Yan,Lei Jiao,Hengjia Wang,Weiqing Xu,Yu Wu,Wenling Gu,Dan Du,Yuehe Lin,Chengzhou Zhu
Enzyme-linked immunosorbent assay (ELISA) has been widely used in the area of biological analysis, while there are still some challenges getting in the way to ensure both excellent sensitivity and reliable accuracy. To overcome these obstacles, we simulated the “smart” sense-and-treat carriers in a drug delivery system to fabricate an improved ELISA, employing zeolitic imidazolate framework-8 (ZIF-8) as the carrier to deliver the tracer agent carbon dots (CDs) and the “drug” thymolphthalein (TP), which was referred to as a “sense-and-treat” ELISA. In the “sense” part, the strong fluorescence intensity of CDs could be observed directly to achieve the sensitive detection of the target. In the “treat” part, after stimulation of alkaline solution, TP was released from ZIF-8 carriers and generated a color change with an obvious absorption, which was beneficial for increasing the sensitivity of this ELISA due to the high loading of the TP. Finally, we took carcinoembryonic antigen (CEA) as a model and performed dual-modal detection using this improved “sense-and-treat” ELISA to accomplish quantitative determinations sensitively and accurately. In addition, the results indicated by the two parts kept good concordance, which could demonstrate the reliable accuracy of this ELISA.
研究领域:
生物分析
·
医学诊断
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2017
·Vol. 28
·期 9
·6544-6551
·
IF 2.019
Wu Guanglei,Li Junli,Wang Kuikui,Wang Yiqun,Pan Chen,Feng Ailing
In this paper, titanium dioxide (TiO 2 )/phenolphthalein-type polyimide (PPPI) composite was synthesized in situ polymerization, the diamino phenolphthalein type compound and dimethylacetamide as the matrix, and TiO 2 as the filler. The mechanical property and thermal conductivity properties were used to characterize the properties of the obtained composite. A diamine monomer containing more benzene rings of phenolphthalein and an ether bond in its main chain were prepared, synthesized by a nucleophilic substitution reaction and a hydrazine hydrate reduction reaction. Polyimide composite had the same structure as that of a diamine monomer. And it was synthesized by solution imidization and heat imidization. The results showed that TiO 2 improved the dispersibility, alignment and interfacial strength of the TiO 2 /PPPI composite. The mechanical property of polyimide composite was increased with the increasing TiO 2 loading. And a suitable addition of TiO 2 could enhance the mechanical properties of polyimide system. Compared to polyimide resin, the TiO 2 /PPPI composite had a higher thermal conductivity with the increasing of TiO 2 content. All of these changes in properties were closely correlated with the TiO 2 /PPPI composite, which could form an interaction interface structure in the system.
研究领域:
材料科学
·
高分子化学
·
复合材料
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产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2022
·
IF 4.831
Xiang-yu Kong,Shao-Min Shuang,Yu Wang,Chuan Dong
Herein, we report a new phenolphthalein appended Schiff base (PASB) as reversible fluorescent sensor for the detection of pyrophosphate (PPi) ions through the metal displacement mechanism. PASB showed sensing exclusively toward Al 3+ ions in DMF/H 2 O (v/v = 1/4, pH 5.5) solution, which resulted in a significant fluorescence enhancement at 540 nm. The 1: 2 binding stoichiometry for the complex formation between PASB and Al 3+ was confirmed by Job’s plot and mass spectroscopic studies. Moreover, a solution of the in situ formed PASB–Al 3+ complex displayed a high selectivity to PPi. The addition of PPi to PASB-Al 3+ ensemble significantly quenched its fluorescence. Thus, a dual response was established based on “Off–On–Off” strategy for detection of both Al 3+ and PPi. The detection limit is 5.86 nM and 26 nM for Al 3+ and PPi, respectively. On this basis, we use PASB to detect Al 3+ in food samples. Furthermore, PASB was successfully applicable to detect Al 3+ and PPi for intracellular imaging in Human liver cancer cells.
研究领域:
分析化学
·
生物医学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
POLYMER INTERNATIONAL
·
2019
·Vol. 68
·期 10
·1729-1738
·
IF 2.433
Xinghua Guan,Heran Nie,Honghua Wang,Jiyong Zhao,Zhipeng Wang,Guangyuan Zhou,Qiang Gu
A series of copolyarylates (PP0–PP100) containing phthalide groups was synthesized via interfacial polymerization from a mixture of phenolphthalein (PP) and bisphenol A with molar equivalent of terephthalyl chloride. Incorporating PP into the polymer chain improved the solubility of the polyarylates in common organic solvents. The glass transition temperature (191–314 °C), residual weight percentage, Young's modulus (1.7–2.8 GPa), solubility and complex melt viscosity of the copolyarylates increased with increasing PP units in the copolymerization. By contrast, crystallinity and elongation at break (14.1 to 11.2%) of the copolyarylates decreased with increasing PP units in the polymer backbone. When the PP content increased over 30 mol% (PP30), the copolyarylates became amorphous polymers. When the PP content was below 30 mol%, the copolyarylates exhibited good melt processability. With regards to its solubility, thermal stability, mechanical properties and melt processability, PP30 may be considered as a promising candidate in the field of processable high-performance engineering plastics. © 2019 Society of Chemical Industry
研究领域:
材料科学
·
高分子化学
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产品关联
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 52
·33149-33159
·
IF 3.361
Yu-qiong Gao,Yan-yan Rao,Han Ning,Da-qiang Yin,Nai-yun Gao
In this study, molybdenum disulfide (MoS2) was chosen as a co-catalyst to enhance the removal efficiency of phenacetin (PNT) in water by a ferrous ion-activated peroxymonosulfate (Fe2+/PMS) process. Operating parameters, such as the initial solution pH and chemical dose on PNT degradation efficiency were investigated and optimized. Under an initial pH of 3, an Fe2+ dose of 25 μM, a PMS dose of 125 μM and a MoS2 dose of 0.1 g L−1, the degradation efficiency of PNT reached 94.3%, within 15 min. The presence of common water constituents including Cl−, HCO3−, SO42− and natural organic matter (NOM) will inhibit degradation of PNT in the MoS2/Fe2+/PMS system. Radical quenching tests combined with electron paramagnetic resonance (EPR) results indicated that in addition to free radical species (˙OH, SO4˙− and O2˙−), nonradical reactive species (1O2) were also crucial for PNT degradation. The variations in the composition and crystalline structure of the MoS2 before and after the reaction were characterized by XPS and XRD. Further, the degradation pathways of PNT were proposed according to the combined results of LC/TOF/MS and DFT calculations, and primarily included hydroxylation of the aromatic ring, cleavage of the C–N bond of the acetyl-amino group, and cleavage of the C–O bond of the ethoxy group. Finally, toxicity assessment of PNT and its products was predicted using the ECOSAR program.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2014
·Vol. 30
·期 6
·905-909
·
IF 1.119
Zhang Jinlei,Lan Cuiling,Shi Bingfang,Liu Fang,Zhao Dandan,Tan Xuecai
A novel type of carboxylated multiwalled carbon nanotube modified electrode(c-MWCNTs/GCE) was constructed and the electrochemical properties of phenacetin(PHE) at it were studied. In a buffer solution of 0.1 mol/L HAc-NaAc(pH=5.3), PHE exhibited a couple of quasi-reversible redox peaks and an anodic peak in the potential range of 0.2–1.2 V at c-MWCNTs/GCE. The peak current was proportional to the concentration of PHE in the range of 4.0×10 −6 –1.0×10 −4 mol/L with a detection limit of 1.0×10 −6 mol/L(S/N=3). The c-MWCNTs/GCE showed excellent repeatability and stability and the electrochemical reaction mechanism of PHE was proposed. This method was used to determine the content of PHE in medical tablets and the recovery was determined to be 96.5%–104.2% by means of a standard addition method.
研究领域:
分析化学
·
药学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 11
·e53628
·
IF 3
Linlin Wang,Minjie Qu,Zhipeng Wang,Honghua Wang,Jiyong Zhao,Guangyuan Zhou
Poly(arylene ether)s with different molecular weights were synthesized via a two-step nucleophilic substitution polymerization by adjusting reaction parameters based on phenolphthalein (PHT) and decafluorobiphenyl (DFBP). The chemical structures and properties were identified by Fourier transform infrared, NMR, gel permeation chromatography, differential scanning calorimetry, thermogravimetric analysis, dynamic thermomechanical analysis (DMA), and so forth. The number-average molecular weight (M n ) of the resulting polymers was in the range of 23.0–49.3KDa. FPAEs (polyarylether including perfluorobiphenyl structure) were demonstrated to have outstanding thermo-resistance with 5% weight loss temperature of about 482–520°C (N 2 ) and high-glass transition temperature (about 240–250°C). FPAEs can be dissolved in conventional organic solvents, possessing excellent film-forming properties. The good mechanical properties of FPAEs were confirmed by the DMA data, with Young's modulus greater than 1.0 Gpa and modulus retention rate at 230°C >67%. FPAEs also showed good hydrophobicity and low-water absorption, in particular, FPAE-1 (FPAE-1-5 were the polycondensation products of PHT and DFBP, just the polymerization conditions were slightly modified) exhibited favorable dielectric properties: at 1 MHz, the dielectric constant and dielectric loss was 2.58 and 0.0053, respectively. Thus, FPAE-1 has broad prospective applications in microelectronic devices and communication technology.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）