POLYMERS FOR ADVANCED TECHNOLOGIES
·
2021
·Vol. 32
·期 12
·4700-4709
·
IF 3.665
Rongzhen Wang,Yan Chen,Yanyan Liu,Mingliang Ma,Zhouyu Tong,Xilei Chen,Yuxin Bi,Weibo Huang,Zijian Liao,Shuailiang Chen,Xinyi Zhang,Qianqian Li
Transition metal as flame retardant has attracted intense interests in recent years. In this work, ZnO@MOF@PZS was prepared via hydrothermal and polycondensation methods. ZnO nanoflowers played the role as a template for growth of MOF@PZS and zinc source for formation of MOF. Subsequently, the obtained ZnO@MOF@PZS was mixed into polyurea (PUA) to investigate its flame retardancy and toxicity suppression properties. The cone calorimeter test (CCT) showed that ZnO@MOF@PZS significantly improved the flame retardancy of PUA composites. The addition of 3 wt% ZnO@MOF@PZS into PUA could result in peak heat release rate (PHRR), total heat release (THR) and total CO production (TCO) of 28.30%, 19.59% and 36.65%, respectively. The result of universal testing machine showed that ZnO@MOF@PZS-add PUA had better mechanical properties. It is notable that the improved flame retardant properties for PUA composites are mainly attributed to ZnO@MOF@PZS promoting the formation of dense char residue.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2020
·Vol. 32
·期 4
·1579-1596
·
IF 2.578
Yongliang Guo,Xiaodong Chen,Jinfeng Cui,Junhong Guo,Haojun Zhang,Baoping Yang
Flame retardants (FRs) improve the intrinsic flammability of epoxy resins (EPs). However, the fundamental properties of EPs are inevitably compromised with the improvement of flame retardancy due to addition of FRs. Here, an ionic liquid (IL) octyltriphenylphosphonium-chelated orthoborate ([OTP][BScB]) has been synthesized and used as a flame-retarding additive for EP (hereafter (EP/[OTP][BScB])). Themogravimetry analysis (TGA) result indicated that the addition of [OTP][BScB] improved the residue yield during thermal degradation. Flammability and combustion tests showed the superior flame-retarding efficiency of the IL. More specifically, the addition of 3 wt% IL made EP/[OTP][BScB] pass the V-0 grade in the vertical burning test (UL-94) and achieve 32.5% value in the limited oxygen index (LOI) test. Cone calorimeter (CC) test showed that, compared with neat EP, EP/10[OTP][BScB] showed a reduction in the peak heat release rate (PHRR) and total heat release (THR) of by 39.7% and 21.8%, respectively, during combustion. Accordingly, the flame-retarding mechanisms in the gas and condensed phases were investigated in detail. In addition, tensile tests showed that the incorporation of the IL enhanced the mechanical property of EP/[OTP][BScB] to some extent. Moreover, UV–vis spectroscopy showed that the transparency of EP was basically maintained on the addition of [OTP][BScB]. Therefore, the IL [OTP][BScB] is a promising flame retardant to improve the properties of EP comprehensively.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2018
·Vol. 30
·期 2
·351-359
·
IF 2.137
Jinying Du,Yu Tian,Ning Li,Jun Zhang,Wei Zuo
In order to improve the antifouling performance of PVDF membrane, a novel zinc sulfide/graphene oxide/polyvinylidene fluoride (ZnS/GO/PVDF) composite membrane was prepared by immersed phase inversion method. The surface morphology, crystal structure, photocatalytic activity, and antifouling property of the as-prepared membranes were systematically studied. Results showed that the ZnS/GO/PVDF hybrid membranes were successfully fabricated with uniform surface. The hybrid membrane surface possessed higher hydrophilicity with water contact angle decreasing from 77.1° to 62.2°. The permeability of the hybrid membrane was therefore enhanced from 222.9 to 326.1 L/(m 2 hour). Moreover, bovine serum albumin (BSA) retention experiment showed that the hybrid membrane separation was also promoted by 7.2%. The blending of ZnS and GO enhanced the hydrophilic and photocatalytic performances of PVDF membrane, which mitigated the membrane fouling effectively. This novel hybrid membrane could accelerate the practical application of photocatalytic technology in membrane separation process.
研究领域:
材料科学
·
环境工程
·
膜技术
✓ 已验证
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2022
·Vol. 33
·期 10
·3501-3511
·
IF 3.348
Chengying Yang,Honghong Li,Zeyu Wu,Xusheng Huang,An Zhou,Ailing Hui,Rui Liu,Wencheng Zhang
In this article, novel molecularly imprinted polymers based on 3D reduced graphene oxide aerogel (3D RGO-GBMIPs) were successfully fabricated and applied as adsorbents for dispersed solid-phase extraction (DSPE) of ginkgolide B (GB). After being prepared by surface molecular imprinted technology, 3D RGO-GBMIPs were successively characterized by fourier transform infrared spectroscopy, thermogravimetric analysis, Raman spectroscopy, and scanning electron microscope. The results of adsorption experiments revealed that 3D RGO-GBMIPs presented highly selective recognition properties and well reusability. The main variables influencing DSPE efficiency, including extraction solvent, 3D RGO-GBMIPs dosage, category, and volume of eluent, as well as elution time were investigated. The DSPE results showed that 3D RGO-GBMIPs had an obvious effect on the improvement of GB purity in ginkgo biloba extract, with a satisfactory recovery rate and yield. Therefore, 3D RGO-GBMIPs are expected to be applied for the enrichment of GB from complex matrices.
研究领域:
分析化学
·
材料科学
·
植物化学
✓ 已验证
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2019
·Vol. 31
·期 4
·853-863
·
IF 2.162
Guo Jiang,Li Yu,Mengdi Zhang,Feng Wang,Shuidong Zhang
Poly(propylene carbonate) (PPC) is an aliphatic polycarbonate synthesized from carbon dioxide and propylene oxide. Poly(3-hydroxybutyrate) (PHB) is a type of thermoplastic polyester produced by biological fermentation. The blending of PHB with PPC can effectively enhance the mechanical properties and barrier properties of PPC. Bionanocomposites of PPC/PHB enhanced by cellulose nanocrystal (CNC) are prepared via a two-step process using polyethylene glycol as a carrier. Results show that the oxygen barrier properties of the composites increased with the increase of the CNC content. When the CNC content is 1 wt%, the oxygen barrier performance increases nearly 18 times. The assumed model can predict the barrier performance of composites with the combined influence of morphology and CNC distribution. This will make PPC/PHB/CNC nanocomposites a very promising degradable material for food packaging application.
研究领域:
材料科学
·
生物工程
✓ 已验证
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2019
·Vol. 31
·期 5
·1027-1037
·
IF 2.162
Haoran Dong,Bihe Yuan,Congrui Qi,Kaiyuan Li,Sheng Shang,Yaru Sun,Gongqing Chen,Hongming Zhang,Xianfeng Chen
Piperazine cyanurate (PCA) is designed and synthesized via hydrogen-bonding self-assembly reactions between piperazine and cyanuric acid. Chemical structure and morphology of PCA are investigated by Fourier transform infrared spectroscopy and scanning electron microscopy, respectively. The prepared PCA is combined with ammonium polyphosphate (APP) to prepare flame-retardant polypropylene (PP) composites. Thermostability, flammability, and combustion characteristics of PP composites are analyzed. The maximum thermal decomposition rate of flame-retarded PP composites has an apparent reduction compared with that of pure PP, and obvious char is left for this intumescent flame retardant (IFR) system of APP and PCA. A high limiting oxygen index value and UL-94 V-0 rating are achieved with addition of APP and PCA. In cone calorimetry test, heat and smoke releases of PP are significantly decreased by this IFR system. Gaseous decomposition products during the thermal decomposition of flame-retardant composites are studied. Chemical structure and morphology of char residues are analyzed. The results illustrate that APP and PCA have a superb synergistic action in the aspect of improvement in fire safety of PP. A possible flame-retardant mechanism is concluded to reveal the synergism between APP and PCA.
研究领域:
材料科学
·
高分子化学
·
燃烧学
✓ 已验证
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2020
·Vol. 31
·期 5
·1164-1171
·
IF 2.578
Mengmeng Song,Meng Zhou,Hengfeng Hu,Heqing Fu
First, attapulgite-Fe 3 O 4 magnetic filler (ATP-Fe 3 O 4 ) was prepared by using a chemical precipitation method. Subsequently, graphite oxide (GO) was prepared through Hummer method, and then reduced GO (RGO) was prepared through GO reduced by chitosan (CS). Finally, a series of WPU-RGO/ATP-Fe 3 O 4 /CS composites were prepared by introduced RGO/ATP-Fe 3 O 4 /CS to waterborne polyurethane. The structure and properties were characterized by scanning electron microscopy (SEM), Fourier transform infrared (FTIR), X-ray diffraction (XRD), vibrating sample magnetometry (VSM), thermogravimetric analysis TGA, conductivity test, and tensile test. The experimental results indicated that thermal stability and tensile strength of nanocomposites were improved with the increase of the content of RGO/ATP-Fe 3 O 4 /CS. Meanwhile, with the increase of the RGO/ATP-Fe 3 O 4 /CS content, the electrical and magnetic properties of WPU-RGO/ATP-Fe 3 O 4 /CS composites were improved. When the content of RGO/ATP-Fe 3 O 4 /CS was 8 wt%, the electrical conductivity and the saturation magnetic strength of WPU-RGO/ATP-Fe 3 O 4 /CS composites were 3.1 × 10 −7 S·cm −1 and 1.38 emu/g, respectively. WPU-RGO/ATP-Fe 3 O 4 /CS composites have excellent electrical and magnetic properties.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2018
·Vol. 29
·期 11
·2774-2783
·
IF 2.137
Siqi Huo,Jun Wang,Shuang Yang,Haopeng Cai,Bin Zhang,Xi Chen,Qilei Wu,Lingfeng Yang
In this paper, a triazine-based flame retardant (TAT) was synthesized from cyanuric chloride and aniline. Its chemical structure was characterized by Fourier transform infrared (FTIR) spectroscopy, 1 H nuclear magnetic resonance, and elemental analysis. Two kinds of novel intumescent flame-retardant epoxy systems were obtained with the incorporation of TAT and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) or hexa-phenoxy-cyclotriphosphazene (HPCP). The flame retardancy of the obtained epoxy samples was evaluated using limited oxygen index, vertical burning (UL94), and cone calorimeter tests. The results indicated that there was a synergistic effect between TAT and DOPO or HPCP. The flame-retardant mechanism was investigated by thermogravimetric analysis (TGA), thermogravimetric analysis/infrared spectrometry (TGA-FTIR) coupled with the morphology and chemical analysis of the char residues. During combustion, DOPO or HPCP decomposed to release phosphorus-containing free radicals with quenching effect. The morphology study showed that the introduction of DOPO or HPCP promoted the carbonization of epoxy matrix and the formation of a phosphorus-containing viscous char layer, while the pyrolysis gases derived from the decomposition of TAT caused the char layer to expand. The main reason of the promotion of flame retardancy of epoxy samples was that the simultaneous addition of TAT and DOPO or HPCP led to the formation of a compact and intumescent char layer that restricted the transfer of heat and combustible volatiles and simultaneously protected the underlying matrix.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2019
·Vol. 30
·期 4
·1096-1105
·
IF 2.162
Baojiao Gao,Dandan Zhang,Yanbin Li
3-Hydroxy- N , N -diethylaniline (HDEA) as a tertiary aromatic amine was introduced onto the surface of chloromethylated polysulfone (CMPSF) microfiltration membrane through modification reaction, resulting in the modified membrane PSF-DEA. A redox surface-initiating system (DEA/APS) was constituted by the bonded tertiary aromatic amine group DEA and ammonium persulfate (APS) in aqueous solution, and so, the free radicals formed on the membrane initiated sodium p-styrenesulfonate (SSS) as an anionic monomer to produce graft polymerization, getting the grafting-type composite microfiltration membrane, PSF- g -PSSS membrane. Subsequently, the adsorption property of PSF -g -PSSS membrane for three heavy metal ions, Pb 2+ , Zn 2+ , and Hg 2+ ions, was fully examined, and the rejection performance of PSF -g -PSSS membrane towards the three heavy metal ions was emphatically evaluated via permeation experiments. The experimental results show that by the initiating of the surface-initiating system of DEA/APS, the graft polymerization can smoothly be carried out under mild conditions. PSF -g -PSSS membrane as a functional microfiltration membrane has strong adsorption ability for heavy metal ions by right of strong electrostatic interaction (or ion exchange action) between the anionic sulfonate ions on the membrane and heavy metal ions. The order of adsorption capacity is Pb 2+ > Zn 2+ > Hg 2+ , and the adsorption capacity of Pb 2+ ion gets up to 2.18 μmol/cm 2 . As the volume of permeation solutions, in which the concentrations of the three metal ions are 0.2 mmol/L, are in a range of 50 to 70 mL, the rejection rate of PSF -g -PSSS membrane for the three heavy metal ions can reach a level of 95%, displaying a fine rejection and removing performance towards heavy metal ions.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2020
·Vol. 31
·期 11
·2816-2826
·
IF 2.578
Xiao Wang,Birong Zeng,Ting Chen,Xinyu Liu,Tong Wu,Hong Shen,Weiang Luo,Conghui Yuan,Yiting Xu,Guorong Chen,Lizong Dai
To endow polyethersulfone (PES) membranes with enhanced hydrophilicity and anti-protein adsorption performance, amphiphilic dithiolane-containing copolymers poly[poly(ethyleneglycol)methylethermethacrylate-co-2-(methacryloyloxy)ethyl 5-(1,2-dithiolan-3-yl)pentanoate-co-(4-formylphenyl)-2-methylprop-2-enoate]{abbr. Poly(MAPEG-co-MALA-co-MAHA)} with different polymerization degree were successfully synthesized, and then blended with PES to prepare microfiltration membranes by immersion precipitation phase inversion process. The chemical structure and molecular weight of poly(MAPEG-co-MALA-co-MAHA) were characterized by NMR, FTIR and GPC. The morphology and surface property of the as-prepared blending membranes were also characterized by SEM, AFM and contact angle testing etc. Compared with pure PES membrane, the contact angle of PES/poly(MAPEG-co-MALA-co-MAHA) membranes decreased from 74.2° to 53.7°, and the bovine serum albumin (BSA) adsorption declined from 121.4 to 58.8 μg cm −2 . Meantime, the water flux of PES/poly(MAPEG-co-MALA-co-MAHA) membranes increased from 38.6 to 89.1 L m −2 h −1 , the flux recovery ratio increased from 68.3% to 93.3% and the irreversible flux decline ratio decreased from 31.7% to 6.7%. Furthermore, the mechanical property of PES/poly(MAPEG-co-MALA-co-MAHA) membrane was better than that of pure PES membrane. In addition, the rejection of BSA and Au nanoparticle reached 77.3% and 66.2% respectively. The results showed that the addition of poly(MAPEG 18 -co-MALA 18 -co-MAHA 18 ) with tiny amount could not only improve the hydrophilicity and antifouling of the membrane, but also endow the microfiltration membrane with the rejection of nanoparticles.
研究领域:
材料科学
·
环境工程
·
生物医学工程
✓ 已验证
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2022
·Vol. 33
·期 10
·3350-3358
·
IF 3.348
Chengbi Chang,Yanbin Wang,Yuya Horiuchi,Hyung Do Kim,Yawen Fang,Hideo Ohkita,Biaobing Wang
Herein, a simple and effective approach has been proposed to enhance the interfacial strength between multiwall carbon nanotubes (MWCNTs) and polymer matrix for improving the dispersion of MWCNTs. In more detail, a soluble polyaniline derivate containing polar group (POMA) was selectively incorporated into the binary blend of poly(amide-imide) (PAI) and MWCNTs. The surface energy and atomic force microscope measurements suggested that POMA was located at the interface of PAI and MWCNTs. Fourier transform infrared measurement indicated that POMA simultaneously interacted with MWCNTs and PAI by hydrogen bonding and π–π interaction, providing stronger interfacial strength between conductive filler and polymer matrix. As a result, the dispersion of MWCNTs and the surface roughness of PAI composites were obviously improved, which is helpful for charge and load transfer in the PAI/MWCNTs/POMA ternary films. As a result, the conductivity increased by 250% from 13 S m −1 for PAI/MWCNTs binary composites to 48 S m −1 for PAI/MWCNTs/POMA ternary composites, and the tensile strength increased from 52 MPa for PAI/MWCNTs binary composites to 66 MPa for PAI/MWCNTs/POMA ternary composites. These findings imply that polar aromatic polymers with suitable surface energy will be a desirable compatibilizer for optimizing the dispersion of carbon nanotubes in the polymer matrix.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2016
·Vol. 27
·期 9
·1211-1219
·
IF 1.823
Ting Ye,Juan Li
In this work, 12-tungestocobaltic acid based organic–inorganic hybrid material, [Bmim] 6 CoW 12 O 40 (CoW) was synthesized and applied as a synergist in polypropylene (PP)/intumescent flame retardant (IFR) composites. The flame retardant properties were investigated by the limiting oxygen index (LOI), UL-94 vertical burning test, thermal gravimetric analyzer (TGA), cone calorimeter and scanning electron microscopy (SEM) etc. The results showed that the PP composites with 16 wt% IFR and 1 wt% CoW achieves the UL-94 V-0 rating and gets a LOI value 28.0. However, only add no less than 25 wt% single IFR, can the PP composites obtain the UL-94 V-0 rating, which suggests that CoW has good synergistic effects on flame retardancy of PP/IFR composites. In addition, the SEM and cone calorimeter tests indicated the CoW improves the quality of char layer. The rate of char formation has been enhanced also because of the existence of CoW. It is the combination of a better char quality and a high rate of char formation promoted by CoW that results in the excellent flame retardancy of PP/IFR composites. Copyright © 2016 John Wiley & Sons, Ltd.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）