CHINESE JOURNAL OF POLYMER SCIENCE
·
2017
·Vol. 35
·期 7
·846-856
·
IF 1.692
Liang Hong-qing,Li Hao-nan,Yu Hao-hao,Zhou Yong-ting,Xu Zhi-kang
Polysulfone (PSF) membranes have gained great attention in the fields of ultrafiltration, microfiltration, and thin film composite membranes for nanofiltration or reverse osmosis. For the first time, it is proposed to fabricate PSF membranes via thermally induced phase separation (TIPS) process using diphenyl sulfone (DPSO2) and polyethylene glycol (PEG) as mixed diluent. DPSO2 is chosen as a crystallizable diluent, while PEG is considered in terms of molecular weight ( M
w ) and dosage. We systematically investigate the interactions between PSF, DPSO2 and PEG based on the simulation calculations and solubility parameter theory. It is inferred that DPSO2 has an excellent compatibility with PSF, and the addition of PEG results in the ternary system thermodynamically less stable and then facilitates its liquid-liquid (L-L) phase separation. SEM images indicate that cellular-like pores are obvious throughout the membrane when the PEG content in the mixed diluent is 25 wt%−35 wt%. We can facilely manipulate the pore size, water flux and mechanical properties of PSF membranes with the dosage of PEG-200, the M
w
of PEG or the cooling rate. The successful application of TIPS can provide a new approach for structure manipulation and performance enhancement of PSF membranes.
研究领域:
材料科学
·
膜技术
✓ 已验证
DOI
高影响因子
GREEN CHEMISTRY
·
2020
·Vol. 22
·期 20
·7003-7009
·
IF 9.48
Tingting Zhu,Baoyou Pei,Tuo Di,Yunxia Xia,Tiesheng Li,Lei Li
Toxic solvents and catalysts, tedious monomer synthesis, and long reaction time significantly limit the sustainable and large-scale preparation and practical application of microporous polyimides (MPIs). In this work, three kinds of MPIs were successfully prepared through thermal polycondensation in the diphenyl sulfone (DPS) solvent using 1,4,5,8-naphthalenetetracarboxylic dianhydride and triamines as building blocks. The polymerization can be completed in 30 min, and the resultant MPIs exhibit large surface areas up to 1825 m2 g−1. Owing to their abundant microporous structures and plenty of imide rings, MPIs demonstrate excellent ammonia adsorption performance (21.10 wt%, at 303 K and 1.0 bar) and favorable regeneration ability. DPS as a non-volatile solvent can be recovered and recycled three times. In comparison with previous reports, this strategy is more time efficient, environmentally friendly and potentially scalable.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
HIGH PERFORMANCE POLYMERS
·
2018
·
IF 1.047
Renxin Xu,Detian Meng,Huajun Sun,Jing Zhou,Shixin Cheng,Zheng Li
A novel variety of cycloaliphatic epoxy resins containing imide and diphenyl sulfone (named as 4,4′-bis[4-(4,5-epoxy-1,2,3,6-tetrahydro-phthalimido) phenoxy] diphenyl sulfone, BIES) is designed and synthesized through the three-step procedure. The mixtures of BIES and diglycidyl 4,5-epoxycyclohexane-1,2-dicarboxylate (TDE-85) are cured with methyl tetrahydrophthalic anhydride. Fourier transform infrared spectrum and proton nuclear magnetic resonance spectrum confirm that the BIES contains the chemical structure of imide and diphenyl sulfone. The measurements of glass transition temperature (Tg), heat distortion temperature (HDT), and the 5% weight loss temperature (T5%) show that the co-cured BIES/TDE-85 exhibits excellent heat resistance. For the BIES/TDE-85 with mass ratio of 0.2, Tg, HDT, and T5% of the co-cured epoxy are 175°C, 162°C, and 290°C, respectively. The impact strength increases from 117 J m−1 to 139 J m−1 with the increasing of the mass ratios of the BIES/TDE-85 from 0 to 0.2.
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
Water
·
2023
·Vol. 15
·期 8
·1456
·
IF 3.4
Longwei Huang,Ke Zheng,Yuting Jin,Shaoqi Zhou
Fabrication of high-dye/salt-separation-performances and chlorine-resistant nanofiltration (NF) membranes are crucial for dye desalination. In this study, a thin-film composite NF membrane (PES–DPS) was prepared through the interfacial polymerization of 3,3′-diaminodiphenyl sulfone (DPS) and trimesoyl chloride. Because of the low reactivity and the presence of the sulfone group (O=S=O) of DPS, the prepared PES–DPS membrane provided a relatively loose polyamide layer and exhibited excellent chlorine resistance, enhancing the membrane water flux and dye/salt separation performances. Furthermore, the influence of DPS concentration was systematically investigated. The optimal membrane PES–DPS–1 exhibited high direct Blue 71 rejection (99.1%) and low NaCl rejection (8.7%). Meanwhile, the PES–DPS–1 membrane displayed highly pure water flux (49.4 L·m−2·h−1·bar−1) even at a low-operating pressure (2 bar). Moreover, no significant difference in dye rejection was observed when the membrane was immersed in NaClO solution (pH = 4.0, 2000 ppm) for 12 h, thereby demonstrating its outstanding chlorine stability. In summary, this work provided a new monomer for the preparation of novel polyamide membranes to achieve excellent separation performances and chlorine resistances.Keywords:loose nanofiltration membrane;dye/salt separation;interfacial polymerization;chlorine resistance;3,3′-diaminodiphenyl sulfone
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES COMMUNICATIONS
·
2022
·
IF 7.685
Qian Wu,Jing Jiang,Fei Xie,Chao Cui,Zibo Hua,Li Liu,Yudong Huang
With the development of aerospace technology, the temperature resistance of traditional silicone resins fails to satisfy the ever-increasing demand from the stringent application conditions. In this paper, we used diphenyl sulfide (TBSP), diphenyl sulfoxide (SIBSP), and diphenyl sulfone (SODP) to modify the main chain of SiR by hydrolysis-condensation and prepared the quartz fiber reinforced SiR composites. The mechanical properties of QF@SiR composites were measured, and the effects of temperature on the mechanical properties were investigated. Compared with QF/SiR, the ILSS and bending strength of QF/SiR@SODP composites enhanced from 15.58 MPa to 183.59 MPa–25.36 MPa and 338.37 MPa at room temperature. Moreover, at 500 °C, the ILSS and bending strength of QF/SiR@SODP were 11.87 MPa and 114.37 MPa, representing an enhancement of 514% and 315% compared with SiR composite. The structural, heat resistance and composition changes of the composites were determined by SEM, TG and IR, and the failure mechanism of the composites at high temperature was elucidated.
研究领域:
材料科学
·
航空航天工程
✓ 已验证
产品关联
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Tingting Fan,Zhenhuan Li,Bowen Cheng
Polyphenylene sulfide (PPS) membranes were fabricated via a thermally induced phase separation method using mixed diluent of epsilon-caprolactam (CPL) and diphenyl sulfone (DPS). The effect of changing the CPL/DPS weight ratio on the structure and properties of prepared PPS membranes were investigated. The morphologies and performances of obtained PPS membranes were characterized by scanning electron microscopy, static water contact angles, mechanical strength, porosity, permeability and salt rejection rate. The characterized results showed that the morphologies of PPS membrane changed from cellular, bi-continuous to spherulitic structure with the increase of CPL/DPS mass ratio. PPS membranes exhibited the excellent stability and high salt rejection ratio in VMD experiments. The largest permeate flux stabilized at 10.63 L/(m 2 ·h 1 ) and the highest salt rejection remained above 98.9% after operating for 10 h.
研究领域:
材料科学
·
化学工程
·
膜技术
✓ 已验证
DOI
高影响因子
Materials Today Communications
·
2025
·
IF 4.5
Tianci Ma,Jinglei Xing,Lei Yang,Long Wang,Xingzhong Fang,Guofei Chen
As is known to all, it is an effective strategy to achieve transparent aromatic polyimides by introduction of fluorine-containing monomer. However, due to the prohibition of perfluoroalkyl and polyfluoroalkyl substances (PFAS), fluorine-free polyimides have attracted more and more attention. In order to investigate the structure-properties relationship of fluorine-free transparent polyimides, a new diamine monomer, 2′,3,3'',5′-tetramethyl-[1,1′:4′,1''-terphenyl]-4,4''-diamine (3TMTD) containing methyl group and terphenyl structure, was successfully synthesized, and a series of highly heat-resistant polyimides were synthesized by 3,3′,4,4′-diphenylsulfone tetracarboxylic acid anhydride (DSDA) with 2,2′-bis(methyl)-4,4′-benzidine (2,2′-DMBZ), 3,3′-bis(methyl)-4,4′-benzidine (3,3′-DMBZ), 3TMTD, 9,9-bis(4-aminophenyl)fluorene (FDA) and 9,9-bis(3-methyl-4-aminophenyl)fluorene (MFDA). And the polyimide containing fluorine element derived from DSDA and 2,2′-bis(trifluoromethyl)-4,4′-benzidine (TFDB) was also prepared for comparison. The effects of different methyl substitution positions and numbers, as well as fluorine-containing diamine and fluorine-free diamines, on the properties were well studied. The resulting polyimides exhibited high T g s of 373–426 °C, transmittances at 450 nm of 66–87 %, and tensile moduli of 2.8–4.0 GPa. Among them, PI-3 derived from DSDA and 3,3′-DMBZ showed the highest T g of 426 °C, while PI-4 derived from DSDA and 3TMTD dispalyed the best comprehensive performance with T g of 405 °C, transmittance of 80 % at 450 nm, tensile strength of 167.6 MPa and tensile modulus of 4.0 GPa.
研究领域:
高分子科学
·
材料工程
·
有机合成
·
光学材料
·
高性能聚合物
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Jingjing Meng,Hao Guan,Chunyu Li,Zhiyong Li,Zheng Fang,Kai Guo
The 5-hydroxymethylfurfural, honokiol, and magnolol are converted into sustainable epoxy monomers, i.e. , 5,5′-(((3′,5-diallyl-[1,1′-biphenyl]-2,4′-diyl)bis(oxy))bis- (methyl-ene))bis(2-((oxiran-2-ylmethoxy)methyl)furan) (MGHF) and 5,5′-(((5,5′-diallyl-[1,1′-biphenyl]-2,2′-diyl)bis(oxy))bis(methylene))bis(2-((oxiran-2-ylmethoxy)- methyl)furan) (MGMF), and they are finally cured by 3,3′-diamino diphenylsulfone (33DDS) and 4,4′-diamino diphenylsulfone (44DDS), thus affording novel interpenetrating polymer networks (IPN). Interestingly, 33DDS induces a twist-stacked structure, whereas 44DDS provides a planar weave matrix. As to the twist-stacked layout MGMF/33DDS, it behaves a superhigh storage modulus (∼5.04 GPa), a high phase transition temperature ( T g , 222.7 °C), and an elevated onset temperature ( T d5 , 362.8 °C). For planar weave arrays, MGHF/44DDS shows the highest values in T g (224.9 °C), lap shear strength (∼20.4 MPa), hardness (∼508 MPa), and reduced Young’s modulus (∼6.06 GPa). Furthermore, MGMF/44DDS shows an excellent dielectric property (11.15, 0.02) (∼1 kHz, 25 °C) and a moderate thermal conductivity (0.355 W (m·K) −1 ) alonging with increased flame retardancy. Besides, those biobased epoxy resin wastes are reclaimable through aerobic or anaerobic pyrolysis. Anaerobic pyrolysis of planar weave networks selectively yields more doped graphene, whereas similar event readily happens to the aerobic pyrolysis of the twist-stacked polymers. In view of these reported advantages, this novel strategy opens new avenues for multifunctional epoxy resins.
研究领域:
材料科学
·
化学工程
·
可持续化学
·
高分子科学
✓ 已验证
产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2021
·
IF 5.455
Tianjiao Wang,Yanchao Yang,Ningning Song,Shiyang Zhu,Hongyan Yao,Yunhe Zhang,Shaowei Guan
In recent years, building microporous polyimides (MPIs) via choosing simple commercial aromatic monomers or concise experimental methods is still an issue worthy to explore. Herein, two cross-linkable aromatic alkynyl monomers (TAPM-PEPA and TAPA-PEPA) were prepared from a commercial alkynyl anhydride PEPA and two aromatic multi-amine TAPM (3D-tetrahedron) and TAPA (near 2D-planar) monomers with different topological structures. The crosslinked polyimides were prepared and endowed microporous features via one-pot thermal crosslinking polymerization in the diphenyl sulfone. The TAPM-PEPA-CL has higher BET surface area and total pore volume (736 m2 g-1 and 0.497 cm3 g-1) than those of the TAPA-PEPA-CL (351 m2 g-1 and 0.358 cm3 g-1). As the topological structure becomes more stereoscopic, CO2 adsorption capacity has been significantly improved from 9.6 wt% to 13.5 wt%. Furthermore, the TAPM-PEPA-CL and TAPA-PEPA-CL have excellent selectivity for CO 2 /CH 4 (12.0–23.6) and CO 2 /N 2 selectivity (54.4–57.6) at 273 K and 1 bar. These results reveal that the introduction of crosslinked structures and control of topological structures have potential application significance for preparing microporous polyimides based on cross-linkable aromatic alkynyl monomers, which is beneficial for the development of the field of gas adsorption and selectivity.
研究领域:
高分子化学
·
材料科学
·
气体分离与吸附
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Yu Qi,Zhihuan Weng,Yan Kou,Lequn Song,Jiahui Li,Jinyan Wang,Shouhai Zhang,Cheng Liu,Xigao Jian
Developing bio-based epoxy resins with high thermal stability and mechanical properties as well as satisfactory intrinsic flame retardancy is of increasing demand, though this has always been limited by the lack of bio-based polyaromatic building blocks. Herein, a simple and universal method was proposed to synthesize an aromatic s-triazine derivative from biomass feedstock, vanillin, and the obtained compound can be employed to construct a bio-based epoxy precursor (THMT-EP). With 4,4′-diaminodiphenyl sulfone (DDS) as curing agent, thanks to the unique structures of aromatic s-triazine, the resulting cured THMT-EP/DDS presented remarkable integrated properties outperforming than commercial petroleum-based bisphenol A epoxy resin (DGEBA), including a record glass transition temperature of 300 °C, as well as a high flexural modulus of 4137 MPa and a flexural strength of 134.2 MPa, which were 120 °C, 53.9% and 14.3% higher than those of DGEBA/DDS, respectively. Furthermore, the cured THMT-EP/DDS also showed excellent intrinsic flame retardancy, passing the V-0 rating in UL-94 test. This study opens an avenue for the synthesis of bio-based feedstocks with rigid aromatic and functional structure, and contributes to the development of bio-based high-performance polymers.
研究领域:
材料科学
·
聚合物化学
·
可持续材料
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2023
·
IF 5.9
Yuan Zhang,Xinyu Zhang,Peng Wang,Yudie Liu,Mengting Wan,Kan Zhang
The fabrication of bio-based epoxy resins having better intrinsic flame retardancy and mechanical performances than petroleum-based epoxy thermosets is important for alleviation of energy and health concerns. In this study, bio-based monomer of diglycidyl ether of curcumin (DGEC) was successfully synthesized from a natural and renewable curcumin through a facile one-step process. The biocompatible epoxy resin obtained was then cured with 4,4′-diaminodiphenyl sulfone (DDS) and compared with petroleum-based diglycidyl ether of bisphenol A (DGEBA). The DGEC/DDS exhibited a higher glass-transition temperature (300 °C) than DGEBA/DDS (215 °C), indicating the outstanding heat resistance. The tensile strength of DGEC/DDS was 65.9 MPa, higher than that of DGEBA/DDS (56.1 MPa). Furthermore, DGEC/DDS showed excellent charring ability with char yield of 50.15% at 800 °C in N 2 , which was approximatively 3.5 times as much as that of the cured DGEBA/DDS (14.68%). Microscale combustion calorimeter (MCC) test demonstrated that the DGEC/DDS possessed lower heat release capacity (HRC, 130 J/gk), peak heat release rate (PHRR, 115.0 W/g) and total heat release (THR, 9.9 kJ/g), which were reduced by 80.2%, 74.8% and 59.4%, respectively, compared to those of DGEBA/DDS (658 J/gk, 457.3 W/g, 24.4 kJ/g). The DGEC/DDS passed the UL-94 test and attained the V-0 rating, revealing the good flame retardancy. This work provided an opportunity to prepare bio-based epoxy resins with better properties than DGEBA, which exhibited promising applications in high heat and flame retardancy fields.
研究领域:
材料科学
·
化学工程
·
可持续化学
✓ 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）