CHINESE JOURNAL OF POLYMER SCIENCE
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2020
·Vol. 39
·期 2
·181-188
·
IF 3.154
Cao Jiang-Yong-Quan,Chen Si-Chong,Zhang Jie,Xie Yang-Yang,Wang Yu-Zhong
Due to the important role of oil source in our life, the separation of water-in-oil emulsion is urgent and necessary. Membrane seperation technology has been an efficient and widely used method in separating oil-water separation. Herein, we report a versatile approach to fabricate surface carbonized membranes with self-standing property from biomass-derived precursor by synergistic charring of phytic acid, arginine and filter paper. The obtained membrane exhibited superhydrophobicity in oil, excellent fouling resistance, and self-supporting ability. The membrane can be cycle-used at least 12 times with high permeation flux (up to 1380 L·m −2 ·h −1 ) and separation efficiency (up to 99.4%).
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COMPOSITES COMMUNICATIONS
·
2020
·
IF 4.915
Dong Wang,Yang Wang,Wei Wang,Ting Li,Jie Jiang,Bihua Xia,Pingming Ma,Minqing Chen,Weifu Dong
For many years, it has remained a hot topic to create a ductile polylactic acid (PLA) composite, especially by the modified lignin. Herein, we demonstrated a facile method for modified alkaline lignin (LMP) which was a toughener for PLA in the presence of polyethylene glycol 400 (PEG400). The mechanical tests showed that in addition to a high extensibility of 328.8%, as-designed PLA/PEG400/LMP ternary blend exhibited excellent toughness of 65.4 MJ·m −3 and high notched impact strength of 10.9 kJ·m −2 , which were respectively 12 and 2 folds of those of neat PLA. Moreover, the toughening mechanism of LMP particles in PLA composites from the morphology study was demonstrated. More importantly, it was meaningful to turn industrial waste lignin into wealth.
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COMPOSITES PART B-ENGINEERING
·
2020
·
IF 7.635
Shan Peng,Yingchun Wang,Yanrong Lan,Xiaomeng Shi,Han Zhang,Hongqiang Qu,Jianzhong Xu
In this study, a layer-by-layer (LBL) method was adopted to firstly fabricate superoleophobic, superhydrophilic, photocatalytic, and flame-retardant polyethylene terephthalate (PET) fabric. The fabric obtained self-extinguished fire retardance through alternative adsorption of charged branched poly(ethylenimine) (BPEI), phytic acid (PA), and ammonium polyphosphate (APP), and this was achieved by repeated assembly of only two bilayers (BL). The coating solution consisting of fluorosurfactant (capstone FS-50) with negative charge and TiO 2 particle was further assembled onto the fire-retardant fabric surface, thus endowing it with superoleophobicity (both in air and water environments) and instant superhydrophilicity. Owing to the wettability differences to water and oil, the coated surface could be used to effectively and directly separate various oil-water mixtures without prewetting. It even acquired robust stability that could separate mixtures of oil with strong corrosive liquids, hot water or ice water. Because of its high superhydrophilicity, the developed surface could also separate various oil-in-water emulsions with high efficiency. Such a surface successfully solved the easy oil-fouling problem of separation membranes by blocking the oil and only allowing water to infiltrate, which led to high recyclability of the surface. Moreover, the introduction of TiO 2 particles endowed the surface with superior photocatalytic ability both in air and under water environments.
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ACS Applied Nano Materials
·
2020
·
IF 0
Zhihao Zhang,Zhongying Ma,Yuhua Wang
At present, most flame retardants, especially halogenated compounds, are banned because of concern for environmental and health issues. In prospect of developing more ecofriendly and effective flame retardants, an alternative solution to develop novel biobased and inorganic flame retardants is addressed. Herein, a nano flame retardant consisting of a lamellar α-zirconium phosphate (α-ZrP) nanosheet modified with chitosan (CH), phytic acid (PA), and a metal ion (Cu2+) with a core–multishell structure is fabricated in water solution via a green and facile self-assembly method and applied to enhance the fire retardant effect of poly(vinyl alcohol) (PVA). Thermogravimetric analysis (TGA) demonstrated that after the addition of α-ZrP@CH@PA@Cu, PVA composites maintained their well-performed ability of char formation. The limit oxygen index (LOI) of pure PVA increased from 18.4 to 29.8% for PVA/α-ZrP@CH@PA@Cu and it reached UL-94 V-1 grade. In the microscale combustion calorimeter test (MCC), the peak heat release rate (pHRR) and the total heat release (THR) of PVA/α-ZrP@CH@PA@Cu sharply decreased by 82.3 and 62.2% compared with pristine PVA. The results implied that α-ZrP@CH@PA@Cu could endow PVA with superior fire retardant properties. Moreover, the research manifested the synergy between α-ZrP and CH@PA@Cu and a double barrier flame retardant mechanism in a condensed phase. In the α-ZrP@CH@PA@Cu flame retardant system, the inorganic α-ZrP nanosheet acted as an insulating core, and the CH@PA@Cu constituted an intumescent shell, where the outer CH@PA@Cu intumescent shell formed an expanded char layer serving as the first barrier to hinder heat and oxygen transfer, and then the inner α-ZrP core layer, as the second barrier, would prevent the further exchange of flammable gases and energy between the polymer and fire during combustion. As a result, this ecofriendly nano flame retardant with the core–multishell structure has a potential application value.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2020
·
IF 3.232
Fengmao Li,Yunming Tang
Peroxidase , a key enzyme causing enzymatic browning, and affected the potential values of fruit and vegetables. Phytic acid and NADH inhibited peroxidase in a competitive manner due to their reducing properties, and it's IC 50 (1.18 ± 0.32) × 10 −8 , (8.02 ± 0.45) × 10 −6 mol L −1 , respectively. The interaction between phytic acid, NADH and peroxidase contributed to intrinsic fluorescence quenching and conformation alternation with a accuracy determination by multispectroscopic techniques (fluorescence spectra, FT-IR and CD spectra), respectively. Molecular docking simulation revealed that phytic acid, NADH interacted with His170, Ala34, Arg38, Ser73, Arg31, Lys174, Gln176, Asn175, Arg75; Gln176, Asn175, Phe221, Lys174, Gly173, Ser167, Phe172, Gly169, His170 in peroxidase, respectively and blocked substrates into catalytic reactions.
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NEW JOURNAL OF CHEMISTRY
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2020
·Vol. 44
·期 33
·14198-14210
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IF 3.288
Yanrong Lan,Yingchun Wang,Han Zhang,Peng Shan,Xiaomeng Shi,Mengying Long
Reports about polyethylene terephthalate (PET) fabrics with durable superhydrophobicity and flame retardance are very limited. In this paper, durable superhydrophobic, photocatalytic, flame-retardant (FR) PET fabrics were fabricated for the first time by a green approach and further employed for various applications. Through layer-by-layer (LBL) alternate deposition of mixed polyelectrolytes, including branched poly(ethylenimine) (BPEI), phytic acid (PA), and ammonium polyphosphate (APP), the fabric obtained superior self-quenched flame retardance through deposition of only two bilayers (BL). The fire burned very slowly, and was self-extinguished after ignition for 8 s. The fabric was also anti-dripping. When the FR fabric was further coated with a layer of PDMS-grafted-TiO2@PDMS coating, it presented excellent superhydrophobicity and self-cleaning properties both under air and water conditions. Moreover, the final fabric showed durable superhydrophobicity, which presented resistance to repeated rinsing treatments, repeated peeling by adhesive tape, and cyclic abrasion treatments. This fabric also showed superior photocatalysis capability and photocatalytically stable superhydrophobicity. The finally coated fabrics could selectively and highly efficiently remove polluted oils from water and separate oil–water mixtures. This multifunctional fabric is believed to show very promising application potential in the flame retardance, superhydrophobicity, self-cleaning, water purification, liquid separation, and photocatalysis fields.
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EUROPEAN POLYMER JOURNAL
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2020
·
IF 3.862
Yanlin Liu,Binbo Wang,Songqi Ma,Xiwei Xu,Jianfan Qiu,Qiong Li,Sheng Wang,Na Lu,Jiale Ye,Jin Zhu
Epoxy thermosets play a significant role in our life, while they have three common issues of depending on fossil resources, flammability and recycle difficulty. Nowadays, it’s still a challenge to address them simultaneously. Here, we report phosphate-based epoxy covalent adaptable networks (CANs) with reprocessability, degradability and flame retardancy from bioresources. Epoxy monomer synthesized from itaconic acid was cross-linked with phytic acid to achieve the phosphate-based epoxy CANs. The CANs were reprocessed at 160 °C within 1.5 h with the activation energy of the bond exchange of 49–90 kJ mol −1 and were readily degraded under mild basic conditions. Meanwhile, the epoxy CANs presented flame retardancy with UL-94 V0 rating and high LOI of 31.2–33.5% on account of the high phosphorus content of phytic acid. This work opens the door of developing phosphate-based CANs and provides a simple method to produce bio-based and fire-safe thermosets.
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MICROCHIMICA ACTA
·
2020
·Vol. 187
·期 10
·1-9
·
IF 6.232
Pu Chenlu,Zhao Hongli,Gu Qinying,Zheng Yu,Lan Minbo
A selectively modified porous metal/carbon nanocomposite was fabricated to enhance the enrichment of low-abundance phosphopeptides from biological samples. The carbon matrix derived from the metal-organic framework provides a suitable pore size to allow the diffusion of peptides, while the deliberately modified metal nanoparticles within the pores enhance their interaction with the phosphopeptides. This nanocomposite shows extremely high enrichment selectivity for phosphopeptides in the MALDI-TOF MS detection, even when the molar ratio of α-casein digests versus bovine serum albumin digests was up to about 1:20,000. By combining such nanocomposite with nano-LC-MS/MS, 4556 unique phosphopeptides were identified with high selectivity (95.2%) from HeLa cell extracts. Furthermore, phosphopeptides from prostate tissue digests were also determined. A total of 277 and 1242 phosphopeptides were identified from normal and tumor tissues of a patient with prostate cancer, respectively. This indicates that phosphorylation and prostate cancer can be related to each other.
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高影响因子
CHEMISTRY OF MATERIALS
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2020
·
IF 9.567
Yuan Ma,Yang Gao,Li Liu,Xiuyan Ren,Guanghui Gao
Currently, most hydrogel sensors require an isolation layer to prevent the current from damaging the skin. However, the mismatch of the mechanical property between the isolation layer and the hydrogel sensor may affect the accuracy of the sensing. Herein, a bilayer hydrogel sensor consisted of a nonconductive layer and a conductive layer, which were prepared through twice freeze–thawing methods. The nonconductive layer which could directly come in contact with the skin was composed of polyvinyl alcohol (PVA) and glycerin (GL), and the conductive layer for conducting current and perceiving strain was composed of PVA, GL, and polyaniline (PAni). Unlike ions, PAni was difficult to diffuse in the hydrogels, which had two layers and exhibited significant difference in conductivity. When the voltage was applied, the bilayer hydrogel could protect the skin from irritation and injury. More importantly, the mechanical property of the two layers was close, enabling the bilayer hydrogel to detect strain effectively. Compared with a single-layer hydrogel sensor, the response and recovery time of the bilayer hydrogel were reduced by 14.8 and 8%, and the accuracy was improved by 32.1%. This unique strategy provides novel inspiration for the development of fast responsive and skin-protective hydrogel strain sensors.
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Asia-Pacific Journal of Chemical Engineering
·
2020
·Vol. 16
·期 1
·e2584
·
IF 1.06
Hao Xu,Guangming Lu,Shuan Liu,Jibin Pu,Shu Tian,Chunlong Mao,Shanjun Chen
A phytic acid-based surface tolerant epoxy coating was prepared, and the effect of phytic acid on the corrosion resistance of the composite coating on rusty carbon steel substrate was investigated. The results showed that the low-frequency impedance modulus of the composite coating on rusty carbon steel could reached 10 8 Ω·cm 2 order of magnitude after immersing for 480 h in 3.5 wt% NaCl solution. Compared with pure epoxy coating, the phytic acid-based surface tolerant epoxy coating on the rusty substrate exhibited better corrosion resistance even if with some artificial defects in the composite coating. The protective performance of the composite coating mainly came from the formation of a stable iron phytate chelate in the reaction of phytic acid and rust. For the rusty carbon steel, the original Fe 3+ on its surface was also transformed by phytic acid penetrating to the interface between the coating and the substrate. Therefore, a dense film was formed with the reaction of phytic acid and rust on the substrates, and the dense film became a part of the whole paint film, which could improve the corrosion resistance of the surface tolerant coating.
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SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2020
·
IF 6.984
Fang Liu,Weidong Liang,Chengjun Wang,Jingxian He,Chaohu Xiao,Zhaoqi Zhu,Hanxue Sun,An Li
Solar-driven water evaporation is emerging as a promising strategy to utilize solar energy for the desalination and water purification . In this work, two kinds of monoliths based on hypercrosslinked polymers (HCPs) nanotubes , which were synthesized using inexpensive and conventional chemicals, i.e. benzene and methylbenzene as building blocks via Friedel-Crafts reaction, have been created as photothermal materials through a superhydrophilic modification followed by the coating of polypyrrole as light absorption layer . The as-synthesized HCPs possess large specific surface area (up to 773 m 2 g -1 ) and low apparent density (0.011 g cm -3 ), which endow them very low thermal conductivity (0.029 W m -1 k -1 ). After modification with sodium alginate and polypyrrole, the resulting HCPs (named as PPy-M-HCPs) show surface superhydrophilicity (water contact angle ~0°), stronger light absorption (ca. 95%) and better mechanical properties . Taking advantages of these unique physicochemical properties mentioned above, the PPy-M-HCPs exhibit outstanding light-to-heat conversion performance with a high solar conversion efficiency of ca. 87% achieved under 1 kW m -2 irradiation. In addition, the PPy-M-HCPs also show excellent salt-resistant performance, e.g. a high energy conversion efficiency of more than 85% obtained in 20 wt% NaCl solution, due to their loosely porous structure coupling with their superhydrophilic wettability . Based on the merits of simple fabrication process, excellent stability and high solar conversion efficiency, the PPy-M-HCPs may have great potentials as efficient photothermal materials for real applications.
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RSC Advances
·
2021
·Vol. 11
·期 2
·1109-1114
·
IF 3.361
Peng Lv,Yeyun Meng,Lingxia Song,Hao Pang,Weiqu Liu
A robust self-supported electrode based on nanocellulose fibers (CNF), multi-walled carbon nanotubes (CNT), and polypyrrole (PPy) was prepared by a facile combination of ultrasonic dispersion and consequent in situ polymerization. In addition, the feasibility of utilizing this ternary composite as an electrode for supercapacitors was studied. The results revealed that the obtained CNF/CNT/PPy composite exhibited a large specific capacitance of 200.8 F g−1 at 0.5 A g−1. Equally important, the electrode capacitance retained about 90% of its initial value after 5000 charge/discharge cycles at a current density of 1 A g−1, which thus demonstrated its excellent cycling stability. The simple integration route and outstanding electrochemical properties distinguish this new composite as a prospective candidate for use as a high-performance electrode in supercapacitors.
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