JOURNAL OF MEMBRANE SCIENCE
·
2016
·
IF 5.557
Jiayou Liao,Zhi Wang,Ming Wang,Chengyun Gao,Song Zhao,Jixiao Wang,Shichang Wang
An ion-exchange material – Poly(diallyldimethylammonium carbonate) (PDDACA) containing mobile carbonate has been prepared and it has been blended in a fixed carrier membrane material – polyvinylamine (PVAm) containing abundant amine-group to adjust the carrier microenvironment of the fixed carrier membrane. It makes the mobile carrier cruise around the fixed carrier. On one hand, the CO 2 can be transported continuously in the swing area of fixed carrier through the mobile carriers, the passivity of fixed carrier can be overcome and the utilization efficiency of fixed carrier can be enhanced. On the other hand, a loose and low crystalline system will be obtained by blending two polymers, the number of effective mobile carrier will be increased with mobile carriers unlocking from the crystalline area, and the loose and low crystalline system will provide a good environment for the movement of mobile carriers. These are conducive to enhance the performance of blend membrane in comparision with single polymer membrane. The CO 2 permeance and CO 2 /N 2 selectivity of PVAm-PDDACA membrane, which concurrently contains fixed amine carriers and movable carbonate carriers, can reach 909 GPU and 102 at 0.11 MPa, respectively. The performance of PVAm-PDDACA membrane is enhanced obviously in comparision with PVAm membrane and PDDACA membrane.
研究领域:
膜科学与技术
·
气体分离
·
高分子材料
·
化学工程
·
环境化工
·
能源材料
·
功能材料
✓ 已验证
DOI
高影响因子
IRANIAN POLYMER JOURNAL
·
2023
·Vol. 32
·期 9
·1189-1197
·
IF 3.1
Luo Yanrong,Lu Chunlan,Zhang Xiaolin,Zhan Shiping
With the widespread use of hydrogels, injectable hydrogels for the human body require higher safety and non-toxicity. The most important is the choice of cross-linking agent to be green. In this study, acylated chitosan macromolecular crosslinkers (MCS) were prepared by maleic acid (MA) and chitosan (CS). Its structure was confirmed by FTIR and 1 H NMR and its degree of acylation was also determined. Then, a series of polymeric network hydrogels were investigated. The cross-linked copolymer poly( N -isopropyacrylamide-maleic acid copolymer)/acylated chitosan P(NIPAM- co -MA)/MCS is a series of thermosensitive hydrogels formed by free radical polymerization of NIPAM and MA with MCS as cross-linking agent. The apparent morphology, thermosensitive transition point, and hydrophilicity were investigated. The results show that the hydrogel has a homogeneous pore structure inside. The optimal low critical solution temperature (LCST) was 36.66 ℃. In addition, with the increase of maleic acid content, the water contact angle of the hydrogel is smaller, that is, the hydrophilic effect is better. The results indicate that the P(NIPAM- co -MA)/MCS hydrogels were synthesized successfully and may be a potential material for biomedical, drug delivery, or absorption application. This study can provide a certain research basis and relevant theoretical basis for clinical practice. Graphical abstract
研究领域:
高分子科学
·
材料科学
·
生物医学工程
·
药物制剂技术
✓ 已验证
DOI
高影响因子
Frontiers of Materials Science
·
2023
·Vol. 17
·期 3
·1-12
·
IF 2.7
Kang Min,Cheng Yizhu,Hu Yinchun,Ding Huixiu,Yang Hui,Wei Yan,Huang Di
Autonomous self-healing hydrogels were achieved through a dynamic combination of hydrogen bonding and ferric ion (Fe 3+ ) migration. N,N ′-methylenebis (acrylamide) (MBA), a cross-linking agent, was added in this study. Poly(acrylic acid) (PAA)/Fe 3+ and PAA–MBA/Fe 3+ hydrogels were prepared by introducing Fe 3+ into the PAA hydrogel network. The ionic bonds were formed between Fe 3+ ions and carboxyl groups. The microstructure, mechanical properties, and composition of hydrogels were characterized by field emission scanning electron microscopy and Fourier transform infrared spectroscopy. The experimental results showed that PAA/Fe 3+ and PAA–MBA/Fe 3+ hydrogels healed themselves without external stimuli. The PAA/Fe 3+ hydrogel exhibited good mechanical properties, i.e., the tensile strength of 50 kPa, the breaking elongation of 750%, and the self-healing efficiency of 82%. Meanwhile, the PAA–MBA/Fe 3+ hydrogel had a tensile strength of 120 kPa. These fabricated hydrogels are biocompatible, which may have promising applications in cartilage tissue engineering.
研究领域:
材料科学
·
生物医学工程
·
高分子科学
·
组织工程
✓ 已验证
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Xu Li,Xiaopeng Wang,Chunsheng Pu,Nasir Khan,Jingyang Pu,Shaofei Kang,Yun Bai,Kai Wang,Jing Liu
Because of the absence of amphiphilic, the disproportionate permeability reduction (DPR) performance of the traditional partially hydrolyzed polyacrylamide (PHPAM) or PHPAM-based gel in oil-wet sandstone reservoirs is barely satisfactory. Therefore, this study proposed a hydrophobically modified polyacrylamide (HMPAM) with amphiphilic in nature, and a series of experiments were performed on both water-wet and oil-wet sandstone core samples to investigate the DPR potential of it. According to the core flooding experiments, HMPAM flooding could reduce the water permeability of oil-wet cores by 93%, and only about 20% permeability reduction can be observed for the oil phase, showing the good DPR performance. In contrast, the traditional PHPAM had no obvious DPR effect on the oil-wet core. The big difference of DPR performance can be attributed to the gap between HMPAM and PHPAM in the adsorption capacity on sandstone surface. For oil-wet sandstones, the adsorption of HMPAM was 5.16 mg/g, while there was only 1.22 mg/g for PHPAM. The adsorption of HMPAM can narrow the pore throats and alter the wettability of the oil-wet rock surface, increasing the flow resistance of water, while hardly affecting the oil flow.
研究领域:
石油工程
·
高分子科学
·
油藏工程
·
提高采收率
✓ 已验证
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Lujun Wang,Taiheng Zhang,Huiwen Meng,Tao Yan,Guoqing Zhao,Caifeng Li,Feipeng Jiao,Jian Huang
With the aggravation of environmental pollution caused by oil and chemical leakages, oil-water separation has attracted much attention from both academia and industry. In this paper, a cost effective immersion method based on the modification of polyurethane sponge has been developed in the application field of oil/water separation. Octadecanethio and polydopamine were used to grafted onto PU sponge which was roughened by etching method. The morphology, composition and surface properties of prepared Ota-PDA-PU sponges were characterized by various techniques. The characterization results of the modified sponge exhibited rough surface structure, excellent flexibility, and possessed super-hydrophobic characteristic with a high water contact angle (WAC) of 155 ± 1°. The as-prepared sponge displayed high absorption selectivity for different organic solvents and oils, the absorption capacity for sesame oil attained 40 times of its own weight. Meanwhile, the absorption selectivity has no decrease after 10 cycles of absorption-desorption process. More importantly, the as-prepared sponge could be used as a filter for oil-water separation.
研究领域:
环境科学
·
材料科学
·
化学工程
·
表面工程
✓ 已验证
DOI
高影响因子
MICROCHIMICA ACTA
·
2017
·Vol. 184
·期 6
·1739-1745
·
IF 4.58
Liu Jingcheng,Xie Yazhen,Wang Kuan,Zeng Qingtao,Liu Ren,Liu Xiaoya
The amphiphilic copolymer poly(vinylbenzyl thymine-co-styrene-co-maleic anhydride) (PSVM) was synthesized by radical copolymerization of styrene, vinylbenzyl thymine, and maleic anhydride. Its chemical structure was proven by using 1 H nuclear magnetic resonance spectroscopy. PSVM was used as a host to prepare a composite consisting of carbon nanotubes and gold nanoparticles by in-situ reduction. The morphology of the nanocomposites was studied by transmission electron microscopy. A glassy carbon electrode coated with this composite is shown to be a viable sensor for the determination of dopamine (DA), paracetamol (PAT) (both at a pH value of 7), and uric acid (UA) (at pH 6). Two linear relationships exists between amperometric current and analyte concentrations. For DA, the linear analytical ranges are from 0.1 to 200 μM and from 200 to 1000 μM. For PAT, the ranges are from 0.1 to 200 μM and from 200 to 1000 μM. For UA, the ranges are from 0.05 to 1000 μM. The respective limits of detection (for S/ N = 3) are 56, 27 and 50 nM. The sensor is highly sensitive, stable, reproducible, and selective.
A hybrid nanocomposite (CNT/PSVM/Au) of carbon nanotube (CNT) – Au nanoparticle composite based on the amphiphilic copolymer poly(vinylbenzyl thymine/styrene-co-maleic anhydride) (PSVM) was prepared through in situ reduction. This nanocomposite was immobilized on a glassy carbon electrode (GCE) to fabricate an electrochemical sensor to determine dopamine (DA), paracetamol (PAT) and uric acid (UA).
研究领域:
材料科学
·
纳米技术
·
分析化学
·
电化学
·
高分子科学
✓ 已验证
DOI
高影响因子
ANALYST
·
2022
·Vol. 147
·期 15
·3504-3513
·
IF 5.227
Mingming Liu,Jian Cao,Cuiping Huang,Meijuan Zhang,Yanan Li,Chuanxiao Wang
In this study, a positively charged near-infrared fluorescent probe (TPA-P+) was constructed by connecting a pyridine cation with triphenylamine and successfully used for the detection of heparin. The probe has the following characteristics: (1) TPA-P+ exhibited both AIE and TICT characteristics. (2) TPA-P+ could detect heparin by the introduction of a pyridine cation into TPA-P+, which increased the electrostatic interaction between the probe and heparin. (3) The probe has high sensitivity and good selectivity towards heparin and responds quickly. (4) Heparin detection using TPA-P+ was verified by protamine and was found to be reversible and effective. (5) The fluorescence intensity of TPA-P+ has good linearity with heparin concentration in the range of 0–16.0 μg mL−1 in human serum albumin.
研究领域:
分析化学
·
生物化学
·
荧光探针
·
材料科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Wanyi Zhang,Jie Cao,Hui Li,Chunhui Du,Shuai Chen,Lei Cao,Jingkun Xu,Baoyang Lu,Ge Zhang
Flexible electrochromic-supercapacitors (FESs) have emerged as competitive candidates in diverse fields like sustainable energy storage and flexible electronics. The development of low-cost, efficient, active, and stable electrochromic-supercapacitor electrode materials is still challenging for high-performance FESs. Herein, we propose a nanoporous 3D conjugated polymer network design strategy to achieve a cost-effective yet high-performance electrochromic-supercapacitor from triphenylamine (TPA) and 3,4-ethylenedioxythiophene (EDOT). The nanoporous 3D conjugated polymer network of TPA and EDOT is realized by efficiently synthesizing a conjugated tripod-structure TPA-EDOT precursor and its successive low-potential electropolymerization . The resulting 3D nanoporous polymer ( PTEPA ) has stable reversibility (91.1% retention after 6000 doping-dedoping cycles), good specific capacitance (137 F g −1 , 1 A g −1 ), and reliable electrochromic properties (multicolor, optical contrast and coloring efficiency of 33 % and 136 cm 2 C −1 at 450 nm). Further, we demonstrate the successful fabrication of a flexible electrochromic-supercapacitor device based on PTEPA , which can change the color from blue-green to violet, achieving monitoring of energy with favorable energy storage characteristics, and excellent stability against multiple charging/discharging and mechanical bending cycles. This structural design strategy may provide a new concept for developing cost-effective yet high-performance electrochromic-supercapacitor materials and devices.
研究领域:
材料科学
·
电化学
·
高分子化学
·
能源存储
·
柔性电子学
✓ 已验证
DOI
高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 3
·1-8
·
IF 5.3
Yang Shuning,Tian Li,Song Guanying,Li Huiling,Li Chao,Wu Qian,Shan Xiangyu,Zhao Lun
An electrochemiluminescence (ECL) sensor for determining bisphenol A (BPA) was prepared based on titanium dioxide (TiO 2 ) and Co-MOF. TiO 2 is a co-reaction promoter that amplifies the ECL signal in the Ru(bpy) 3 2+ -trinpropylamine (TPrA) system. When the electrode is modified with Co-MOF the ECL signal is significantly enhanced. This is because Co-MOF can not only be used as a co-reaction accelerator but also as a carrier to adsorb more luminescent substances. Possible mechanisms for amplifying the original signal through the synergistic action of the two substances are investigated. The ECL strength decreases with increasing concentrations of BPA, and the amount of BPA can be determined by the change in ECL signal strength (Δ I ). Under optimal experimental conditions, the linear range of BPA was 2.0 × 10 −10 to 2.0 × 10 −5 M, with a determination limit of 6.7 × 10 −11 M (3 σ / m ). The relative standard deviation (RSD) of the signal for ten consecutive measurements was 1.5%. The sensor can be used to detect BPA in bottled samples with recoveries of 96 to 105%. Graphical
研究领域:
分析化学
·
环境科学
·
材料科学
·
电化学
·
传感器技术
✓ 已验证
DOI
高影响因子
Nano Research
·
2023
·Vol. 16
·期 11
·12753-12761
·
IF 9.9
Li Xu,Sun Xiaohui,Zhang Jiuyue,Xue Song,Zhi Linjie
Multifunctional intelligent fabric plays an integral role in health management, human–machine interaction, wireless energy storage and conversion, and many other artificial intelligence fields. Herein, we demonstrate a newly developed MXene/polyaniline (PANI) multifunctional fabric integrated with strain sensing, electrochemical energy storage, and electromagnetic shielding properties. The multifunctional fabric-based strain sensor possesses a real-time signal response at a sizeable tensile strain of 100% with a minute strain of 0.5%, maintaining a stable and consistent signal response even after 3000 stretch–release cycles. In addition, the multifunctional fabric exhibits excellent electromagnetic shielding capabilities, achieving a total shielding effectiveness value of up to 43 dB, and in the meantime shows attractive electrochemical energy storage performance as an electrode in a supercapacitor, offering a maximum specific capacity and energy density of 522.5 mF·cm −2 and 18.16 µWh·cm −2 , respectively. Such a multifunctional intelligent fabric offers versatile opportunities to develop smart clothes for various artificial intelligent applications.
研究领域:
材料科学
·
传感器技术
·
电磁兼容
·
能量存储
·
可穿戴电子
·
纳米技术
✓ 已验证
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2023
·Vol. 30
·期 2
·1-11
·
IF 2.8
Yang Qingshan,Wang Jun,Yang Shuang,Huo Siqi,Song Pingan,Fang Zhengping,Wang Hao
A phosphorus-containing aliphatic amine curing agent (DPT) was synthesized using triethylenetetramine (TETA) and diphenyl chlorophosphate (DPCP), and it served as a flame-retardant curing agent to reduce the fire risk of epoxy resin (EP) systems. The curing behaviors, thermal properties and flame retardancy of the DPT-containing EP systems were investigated in detail. The differential scanning calorimetry (DSC) analysis showed that the introduction of phosphorus-based group reduced the curing activity of -NH 2 /-NH- groups in DPT. The glass transition temperature ( T g ) values of the DPT-containing EP systems were modestly lower than that of EP/TETA system. The EP cured by 29wt% DPT (EP/DPT-29) achieved a limiting oxygen index (LOI) of 27.1% and a UL-94 V-0 rating, and its peak heat release rate (PHRR) and total smoke production (TSP) were 51.6% and 37.8% lower than those of EP/TETA. The improved flame retardancy and smoke suppression of the DPT-containing EP systems was attributed to the bi-phase flame-retardant action of DPT.
研究领域:
高分子科学
·
材料工程
·
消防安全工程
·
有机化学
✓ 已验证
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Xiaomin Tang,Ting Huang,Shixin Zhang,Jie Zheng,Huaili Zheng
The safety of drinking water arouses wide concern in countries. Dissolved organic matter (DOM) as a precursor of disinfection by-products is the potential threat to human health. An amphoteric chitosan-based flocculant, CS-g-P(AM-AMPS), was synthesized via graft copolymerization to improve DOM treatment in this study. Acrylamide as a trigger and bridge conduced to grafting sulfonate groups originating from 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS) onto molecular chains of CS. Initiator dosage, reaction temperature and reaction time influenced the generation of free radicals and further impacted the characteristics and performance of CS-g-P(AM-AMPS). CS-g-P(AM-AMPS) possessing anionic sulfonate groups and cationic amido groups strengthened bridging and adsorption in drinking water treatment, enhanced the removal rate of DOM and the settling efficiency of flocs and weakened the inhibition of natural organic matter to coagulation. DOM was partly removed via co-settling with colloid particles and being trapped by flocs as well.
研究领域:
环境科学
·
水处理技术
·
高分子化学
·
公共卫生
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）