Polymers
·
2023
·Vol. 15
·期 2
·459
·
IF 5
Yunlong Le,Yunshan Guan,Xiaoying Ma,Weidong Zhang
Boron removal from aqueous solutions has attracted increasing attention, offering benefits for animal and plant health as well as profound significance for exploiting Salt Lake boron resources. In this work, we synthesized novel glycidol-functionalized and hydrophilic polyaniline (PANI) nanorod adsorbents, which were prepared to separate boron compounds from boric acid aqueous solutions. The as-prepared adsorbents were significantly different from the traditional polymers’ grafting reaction because they had a higher functional yield and more active position for adsorption. The maximum adsorption capacity (0.2210 mmoL∙g−1) and optimal adsorption conditions (boric acid concentration of 1307 mg/L, pH = 9.82, time of 10 h) were obtained with single-factor experimentation and the response surface method (RSM). In addition, adsorption kinetics studies showed that the adsorption reaction belonged to the pseudo-first-order kinetic model, and diffusion was the key limiting factor; therefore, the adsorption equilibrium time is more than 10 h. Finally, the related possible adsorption mechanism was investigated based on the species and the diffusion of boron in the aqueous phase.Keywords:boron adsorption;adsorbents;polyaniline nanorods;glycidol
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
WOOD SCIENCE AND TECHNOLOGY
·
2023
·Vol. 57
·期 6
·1467-1483
·
IF 3.4
Ba Zhichen,Liang Daxin,Xiao Zefang,Wang Yonggui,Wang Haigang,Xie Yanjun
In living spaces where wood is commonly used for both construction and decoration, it is crucial to minimize electromagnetic pollution and the risk of fire. In this study, we applied aniline treatment to wood in situ and examined its impact on electromagnetic shielding and fire resistance. By enabling in situ polymerization and the deposition of polyaniline particles within the wood, we enhanced the wood’s conductivity while maintaining its porous structure, thereby improving its ability to absorb microwaves. The results indicated that wood species with low density exhibited higher electromagnetic shielding efficiency after treatment due to their greater polyaniline loading. Specifically, an specific electromagnetic shielding efficiency up to 65.8 dB cm −3 g −1 was achieved on the cross sections of treated wood. Furthermore, the total heat release and smoke production decreased by 43.9% and 66.7%, respectively, while the wood char mass increased by 66.3%. The results demonstrated that polyaniline-treated wood with bifunctional features could serve as a promising candidate in this field.
研究领域:
材料科学
·
林学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2024
·
IF 4
Yazhou Guo,Yonggang Du,Guibo Liu,Yuyan Bi,Weiqiang Xu,Yahui Cui,Yulei Jia
Herein, a novel and high-performance adsorbent, polyaniline-sodium alginate (PANI–SA) hydrogel microspheres were prepared via ion cross-linking technique for adsorption and removing methylene blue (MB) dye from wastewater. The processes involved synthesizing polyaniline (PANI) with macromolecular skeleton and doping it into sodium alginate (SA) to prepare hydrogel microspheres with high specific surface area, abundant functional groups, and excellent adsorption properties. The surface morphology, crystallinity, functional groups, thermal stability, pore size distribution, and specific surface area of PANI–SA hydrogel microspheres and their components were determined by SEM, XRD, FTIR, TGA, and BET. Various parameters, including polyaniline doped concentration, solution pH, initial dye concentration, adsorption time, and temperature were systematically investigated to understand their impact on the adsorption properties of PANI–SA. The results revealed a synergistic effect between PANI and SA, with PANI–SA exhibiting exceptional efficacy (1060.78 mg/g) in removing MB from aqueous solutions. The kinetics and isotherm adsorption behaviors were aptly described by the pseudo-first-order kinetic and the Langmuir isotherm models, respectively. Thermodynamic analyses confirmed the spontaneous and exothermic nature of adsorption. Furthermore, the PANI–SA hydrogel microspheres demonstrated excellent reusability, maintaining high adsorption capacity after 5 recycling rounds. Electrostatic interactions and hydrogen bond were found to be the primary mechanisms driving the adsorption process. This study not only contributes to the development of efficient and eco-friendly adsorption materials for dye wastewater treatment but also provides insights into the design and optimization of hydrogel adsorbents.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
·
2021
·
IF 5.062
Chang Bai,Yong Liu,Cong Wang,Xiao-Cong Zhang,Jia-Xuan Wu,Hai-Tao Ren,Xu Han
Although the oxidation processes mediated by persulfate (PS) and peroxymonosulfate (PMS) attract more attention in the degradation of various recalcitrant contaminants, the high concentrations of oxidants required for the low concentrations of contaminants always limit their large-scale applications. In this work, aniline can be effectively oxidized by CuO and PS under pH-neutral and alkaline conditions. The increased observed rate constant ( k obs ) values with increasing pHs indicate that the oxidation of aniline is facilitated by solution OH − . Meanwhile, the low ratios between the removed PS and aniline (1.19 at pH 7.0 and 1.68 at pH 12.0) indicate the high catalytic oxidation efficacy of the CuO-PS system. The insignificant contributions of SO 4 − , OH, 1 O 2 and O 2 − to aniline oxidation in quenching experiments and EPR analysis suggest that PS is likely activated on the surface of CuO via the non-radical pathway. The presence of carbon-centered radicals (CCRs), as well as UV and GC MS analysis, indicates the important intermediates of PhNH 2 + and PhNH radicals during the oxidation process, revealing that separate transfer of an electron from aniline to the activated PS, followed by subsequent abstraction of a H + by OH − to form PhNH are two important steps in the oxidation process. Further coupling of PhNH radicals results in the formation of insoluble polyaniline polymers at pHs 7.0 and 12.0. The high thermal stability and ideal pseudo-capacitive properties of the insoluble products indicate that the polyaniline produced from aniline wastewater can be used for high-temperature-resistant materials or capacitors. This study provides an efficient alternative to turn aniline waste to polyaniline polymers.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Frontiers of Chemical Science and Engineering
·
2020
·Vol. 15
·期 1
·118-126
·
IF 3.552
Liu Jie,Shen Jiahao,Wang Jingjing,Liang Yuan,Wu Routeng,Zhang Wenwen,Shi Delin,Shi Saixiang,Wang Yanping,Wang Yimin,Xia Yumin
To enhance the solubility of polyanilines (PANI), polymeric ionic liquid (PIL) was introduced into the polymerization synthesis of PANI with various proportions. The structure and properties of the modified PANIs were characterized by 1 H NMR, Fourier transform infrared spectroscopy, thermogravimetric analysis, ultraviolet-visible spectrum, etc. It was found that the obtained PANIs doped with PILs were soluble in various organic solvents such as N , N -dimethyl formamide and acetonitrile. Compared with the pure PANI, the PANIs doped by PILs showed remarkable solubility and their chemical structure and conductivity kept integrated.
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
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 138
·期 15
·50190
·
IF 2.52
Haonan Cheng,Yunjie Yin,Bo Wang,Junrong Zhu,Chaoxia Wang
Fabrication of highly conductive poly(styrene)/poly(aniline) (PS/PANI) microspheres has been considerably explored. Improving the adsorption efficiency of aniline on the PS microspheres is still a challenge by facile methods. To overcome this problem, poly(styrene-co-methacylic acid) (poly(St-co-MAA)) is firstly synthesized for capturing anilinium ions, and then the in-situ polymerization of aniline is implemented to obtain highly conductive poly(St-co-MAA)/PANI microspheres. The prepared poly(St-co-MAA) microspheres bearing an average particle size of 238 nm possess a low polymer dispersity index (PDI, 0.082) and high zeta-potential, which guarantee no agglomeration and deposition of microspheres latex after 30 days at room temperature. After the in-situ polymerization of aniline, the conductive disc based on poly(St-co-MAA)/PANI microspheres presents a superior electrical conductivity of 14.6 S m −1 at an inferior PANI loading of 5.74 vol% and a relatively low electrical percolation threshold (EPT < 0.16 vol%). The results indicate that the carboxylic microspheres for preparing high polymer/PANI microspheres is effective. Meanwhile, poly(St-co-MAA)/PANI microspheres show a great potential in manufacture of conductive composites due to their excellent electrical conductivity.
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
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Yongning Ma,Panpan Li,Peihan Wu,Mingyuan Guo,Yuhao Yang,Xiaolong Li
In photocatalytic anticorrosion perspective, the migration rate of excited electrons from surface layers to substrate steels restricted the performance of g-C 3 N 4 due to the high resistance between interface of g-C 3 N 4 layers and adhesive layers. Herein, an S-scheme g-C 3 N 4 /polyaniline (PANI) heterojunction with face-to-face structure was established by a secondary calcining method. The as-prepared heterojunctions were applied to protect Q235 carbon steel, and the results showed that the anticorrosion performance of S-scheme g-C 3 N 4 /PANI heterojunction is much higher than that of g-C 3 N 4 and PANI coating layers according to salt spray test. Photocurrent intensity indicated that the optimum amounts of g-C 3 N 4 and PANI were 0.06 and 0.09 mL/cm 2 , which are benefit for the transport of excited electrons due to the optimum thickness of coating layers. Furthermore, the S-scheme g-C 3 N 4 /PANI heterojunction can promote the separation rate of charge carriers and suppress the recombination rate at the same time, which are inferred from photocurrent intensity, electrochemical impedance spectra, super-depth-of-field microscope, and photoluminescence investigation. In the last, the enhanced anticorrosion performance of S-scheme g-C 3 N 4 /PANI heterojunction with face-to-face structure was deduced according to mentioned characterization.
研究领域:
材料科学
·
腐蚀与防护
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2011
·
IF 3.829
Muhammad Naveed Anjum,Lihua Zhu,Zhihong Luo,Jingchun Yan,Heqing Tang
Optically active polyorthoanisidine, polyorthotoluidine, polyorthoethylaniline and polyorthochloroaniline were synthesized with chemical polymerization of corresponding monomers in aqueous medium by using d - or l -camphorsulfonic acid ( d - or l -CSA) as chiral dopant , ammonium persulfate as oxidant, and diaminodiphenylamine as initiator. By circular dichroism spectroscopic measurements, it was found that PANI exhibited generally a reversed chirality in comparison with the used chiral dopant, but the substituted PANIs had the same one as the chiral dopant. This revealed that the substituent at ortho position caused helical inversion of conformation in comparison with the parent PANI. Such effect was further confirmed by the influence of the copolymerization of aniline and its derivatives on the chirality of the copolymers . The effect of the substituent on the chirality of the copolymers was increased with the increase of the steric hindrance of the ortho substituent. A mechanism was proposed to explain the effects of steric hindrance on the chirality of PANIs. The clarified relationship between the steric hindrance and the chirality of the polymer can enable us to tailor the chiroptical properties of functional polymer materials for future application.
研究领域:
高分子化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SYNTHETIC METALS
·
2016
·
IF 2.299
Gang Fu,Li Ma,Mengyu Gan,Xiuling Zhang,Meng Jin,Yao Lei,Peishu Yang,Maofa Yan
This research paper describes a facile strategy to synthesize the novel 3D Spongia-shaped polyaniline/MoS 2 nanospheres composite under the addition of polyvinylpyrrolidone (PVP) (named sPANI/A-MoS 2 ), and this composite displays excellent electrochemical properties as an electrode material for supercapacitors. The structure and morphology of the as-prepared 3D sPANI/A-MoS 2 are characterized by scanning electron microscopy (SEM), Fouriertransform infrared (FT-IR), X-ray diffraction (XRD), X-ray photoelectron spectrum (XPS), Raman spectroscopy measurements and Thermogravimetric Analysis (TGA). Cyclic voltammograms (CV) and galvanostatic charging/discharging (GCD) tests are adopted to evaluate the electrochemical performances of the composite. All the results powerfully demonstrate the successful fabrication of 3D sPANI/A-MoS 2 . The maximum specific capacitance of this composite reaches up to 605 F g −1 at a current density of 1 A g −1 , and the energy density of 53.78 Wh kg −1 is obtained at a power density of 0.4 kW kg −1 . Notably, the capacity retention of the as-fabricated sPANI/A-MoS 2 composite electrode can maintain 88.6% (well above 59.8% for sPANI) after constant charge-discharge 1000 cycles, showing an excellent electrochemical stability.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2019
·
IF 6.309
Qixin Yang,Yiyuan Shi,Yu Fang,Yubing Dong,Qingqing Ni,Yaofeng Zhu,Yaqin Fu
A novel ternary nanocomposite of Fe 3 O 4 functionalized porous biomass carbon decorated by aligned polyaniline (A-PANI/Fe 3 O 4 /PBC) was successfully fabricated by hydrothermal and in situ oxidative polymerization. The morphology and structure of the composite was characterized by X-ray diffraction, fourier transform infrared spectra, scanning electron microcopy, transmission electron microscopy , X-ray photoelectron spectra and vibrating sample magnetometer . The microwave absorbing properties of A-PANI/Fe 3 O 4 /PBC composite were investigated in the frequency of 2–18 GHz. The results indicated that the A-PANI/Fe 3 O 4 /PBC composite possess excellent microwave absorbing performance, and the minimum reflection loss can be up to −44.8 dB at 10.67 GHz, effective absorbing bandwidth ( RL < −10 dB) reaches 4.69 GHz with a thickness of 2.7 mm. The excellent microwave absorbing performance of composite was mainly related to the multi-loss mechanisms, good impedance matching, synergistic and geometrical effect of porous biomass carbon, magnetic particles and aligned PANI.
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
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2019
·Vol. 20
·期 8
·2013
·
IF 4.183
Zheng Zheng,Libin Huang,Lu Yan,Feng Yuan,Lefeng Wang,Ke Wang,Tom Lawson,Mimi Lin,Yong Liu
The regeneration of neurons is an important goal of neuroscience and clinical medicine. The electrical stimulation of cells is a promising technique to meet this goal. However, its efficiency highly depends on the electrochemical properties of the stimulation electrodes used. This work reports on the preparation and use of a highly electroactive and biocompatible nanoelectrode made from a novel polyaniline functionalized graphene composite. This nanocomposite was prepared using a facile and efficient polymerization-enhanced ball-milling method. It was used to stimulate the growth of PC12 cells under various electrical fields. The enhanced growth of axons and improved wound regeneration of PC12 cells were observed after this treatment, suggesting a promising strategy for neuro traumatology.Keywords:polyaniline;graphene;neuroregeneration;PC12 cells;electrical stimulation
研究领域:
神经科学
·
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Yufeng Bai,Huizhi Yang,Lili He,Chunhua Ge,Renchang Zhai,Xiangdong Zhang
As electronic device integration and power density increase, materials must have brilliant microwave absorption properties and thermal conductivity to solve electromagnetic wave pollution and thermal management problems. In this work, we attempt to construct core-shell hydroxylated boron nitride nanosheets (BN-OH) @Fe 3 O 4 @PAn (BFeA) nanocomposites by chemical synthesis and in-situ growth design. The excellent magnetic properties of Fe 3 O 4 and the good electrical conductivity of PAn can form magnetic loss and electrical loss centers to play a synergistic effect in improving microwave absorption capacity. Meanwhile, with the wave-transmitting material BN-OH as the core, the electromagnetic waves can be reflected multiple times within the absorber, which further enhances the microwave absorption capability of BFeA. As a result, the minimum reflection loss (RL min ) of the composites can reach − 49.85 dB at 11.36 GHz, and the effective microwave absorption bandwidth (RL<−10 dB, EAB) is close to 8 GHz (8.5–16.5 GHz) at a thickness of 3 mm. Simultaneously, to improve the thermal conductivity (TC) of the BFeA and reduce the interfacial thermal resistance, we use hydroxyl and dopamine as the interface linking agent at the interfaces of BN-OH and Fe 3 O 4 , and Fe 3 O 4 and PAn, respectively. In this case, the TC of BFeA-2 reaches 0.98 W (m K) −1 at a total BN–OH content of only 13 wt. %, nearly 4 times that of the raw material (Fe 3 O 4 ). This work can provide a reference for developing materials with dual functions of thermal management and microwave absorption.
研究领域:
材料科学
·
电磁学
·
热传导
✓ 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）