EUROPEAN POLYMER JOURNAL
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2023
·
IF 6
Yu Gao,Yuxin Wu,Yuejie Chen,Tianjun Zhou,Liangjiu Bai,Wenxiang Wang,Hou Chen,Huawei Yang
For novel wearable flexible electronics, the design of hydrogels materials with anti-freezing capability is of great significance to meet the mechanical flexibility and smart sensing at cryogenic temperatures. Herein, glycosyl cross-linking boron acid and ammonium salt of phytic acid (PA) (GBAP) was synthesized based on eco-friendly organic materials, which was successfully wrapped on the surface of graphene oxide (GO) to obtain GO@GBAP. L-proline (L-Pro) as an antifreeze zwitterion and GO@GBAP were implanted in polyvinyl alcohol (PVA) and xanthan gum (XG) three-dimensional network structure. PA with antifreeze property was further introduced as a crosslinking agent, the PVA-XG/GO@GBAP/PA/L-Pro (PGPL) composite hydrogels were successfully prepared. While at −20°C, the PGPL hydrogels had remarkable mechanical strength (0.80 MPa), and they revealed the splendid self-healing efficiency (89.2%) after 4 h of healing. The high-sensitivity flexible sensors based on these PGPL hydrogels exhibited a rapid response time (220.0 ms) and electrical conductivity (detection mean 2.1 S/m at −20°C). Even at −20°C for 24 h, it could still respond to various physical and physiological movements such as swallowing and wrist activities. This nanocomposite hydrogels constructed in this work had expanded their application scope in the field of cryogenic sensing.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Chongtao Ding,Yao Yu,Yu Wang,Yang Mu,Xueying Dong,Changgong Meng,Chi Huang,Yifu Zhang
Oxygen Evolution Reaction (OER) has gained significant attention due to its crucial role in renewable energy systems. The quest for efficient and low-cost OER catalysts remains a challenge of significant interest and importance. In this work, phosphate-incorporated cobalt silicate hydroxide (denoted as CoSi-P) is reported as a potential electrocatalyst for OER. The researchers first synthesized hollow spheres of cobalt silicate hydroxide Co 3 (Si 2 O 5 ) 2 (OH) 2 (denoted as CoSi) using SiO 2 spheres as a template through a facile hydrothermal method . Phosphate (PO 4 3− ) was then introduced to layered CoSi, leading to the reconstruction of the hollow spheres into sheet-like architectures. As expected, the resulting CoSi-P electrocatalyst demonstrated low overpotential (309 mV at 10 mA·cm −2 ), large electrochemical active surface area (ECSA), and low Tafel slope. These parameters outperform CoSi hollow spheres and cobaltous phosphate (denoted as CoPO). Moreover, the catalytic performance achieved at 10 mA cm −2 is comparable or even better than that of most transition metal silicates/oxides/hydroxides. The findings indicate that the incorporation of phosphate into the structure of CoSi can enhance its OER performance. This study not only provides a non-noble metal catalyst CoSi-P but also demonstrates that the incorporation of phosphates into transition metal silicates (TMSs) offers a promising strategy for the design of robust, high-efficiency, and low-cost OER catalysts.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 31
·e54215
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IF 3
Chenlin Wang,Zhihao Zhang,Zhongying Ma,Zhenzhu Zhou,Junchao Huang,Yuhua Wang
Fireproofing the polyvinyl alcohol (PVA) membrane is an essential and urgent reinforcement to ease the restriction in flame-resistant requirements. The traditional method by the physical and heterogenous introduction of a large number of metal hydroxides, halogenated and organic compounds efficiently enhance the flame-retardancy but severely weakens the biocompatibility, mechanical strength, and transparency of PVA membranes. In this work, two bio-extracted compounds, phytic acid (PA) and creatine (CR) are employed to construct a fireproof, tough and transparent PVA membrane. The LOI of the PVA/PACR membrane increases from 18% to 30% and reaches a V–0 grade in UL-94 testing. Meanwhile, the mechanical strength receives 20% reinforcement due to a chemical crosslinking between PVA, PA, and CR. Intriguingly, unsaturated chemical bonds from PA and CR endow a favorable UV-absorbing capacity to the PVA membrane, which will benefit the anti-aging and food freshness retaining demands in advanced packaging applications.
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JOURNAL OF POLYMER RESEARCH
·
2023
·Vol. 30
·期 6
·1-12
·
IF 2.8
Wang Chenlin,Zhang Zhihao,Ma Zhongying,Zhou Zhenzhu,Wang Yuhua
In present, during preparing flame retardant polyvinyl alcohol (PVA) composites, most flame retardants present inferior fire retardant efficiency and trend to decrease the mechanical performance of PVA owing to bad dispersibility. Besides, they possess possible threat to human and environmental safety. In order to solve these issues, a bio-based flame retardant (PAE) is synthesized by using phytic acid and ethylenediamine to improve PVA flame retardancy, UV shielding properties and mechanical properties. According to thermographic examination, PVA composites retained its well-performed capacity of char production and thermal stability with the addition of PAE. The limiting oxygen index grows from 18.4% of pure PVA to 29.7% of PVA/PAE-15 composite and vertical burning rating reaches UL-94 V-0. The peak heat release rate and total heat release of PVA/PAE-15 sharply decreased by 68.1% and 31.0% comparing with pristine PVA. More importantly, PVA/PAE composites have outstanding mechanical properties and UV shielding, the addition of 5 wt.% PAE increases the tensile strength from 67.6 MPa to 85.1 MPa compared with pure PVA. Therefore, the results imply that the inclusion of PAE can elevate the flame retardant capability, mechanical properties and UV shielding of PVA.
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COMPOSITES PART B-ENGINEERING
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2023
·
IF 13.1
Miao Liu,Kexin Chen,Yongqian Shi,Shijie Wu,Yuezhan Feng,Libi Fu,Jiefeng Gao,Longcheng Tang,Fuqiang Yang
Interest in advanced multifunctional composite materials has generated extensive discussions on materials endowed with high fire-resistance, mechanical strength , and excellent electromagnetic interference (EMI) shielding. We designed a feasible and low-cost method for preparing mechanically robust thermoplastic polyurethane/triazine-rich polyphosphazene functionalized titanium carbide@copper phytate/carbon fiber fabric (TPU/PZM@CP/CF) nanocomposites with enhanced fire retardancy and EMI shielding performances. The as-prepared TPU/PZM@CP-2.0/CF demonstrated excellent mechanical toughness, with a tensile strength of 57.8 MPa. Additionally, this nanocomposite exhibited superior EMI shielding performances, with an EMI shielding effectiveness of 29.7 dB and a normal shielding effectiveness of 24.8 dB/mm, surpassing that of most other TPU-based nanocomposites. Furthermore, the thermal stability and fire resistance of the TPU/PZM@CP nanocomposites were significantly improved. For instance, the peak of heat release rate and the peak of smoke production rate of the TPU/PZM@CP-2.0 respectively decreased by 41.5% and 21.5%, compared to those of neat TPU. In this work, the simple preparation method and outstanding comprehensive performances of the mechanically strong multifunctional TPU/PZM@CP/CF have tremendous potential for applications in defense, smart electronic device and aerospace.
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Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 22
·7419-7426
·
IF 6.4
Jia Yang,Mingxin Guo,Lanlan Feng,Jiajia Hao,Yaxin Guo,Zhipeng Li,Shuzheng Liu,Gang Qin,Gengzhi Sun,Qiang Chen
In the past few years, in situ polymerization of polyaniline (PANI) on a hydrogel polymer electrolyte (HPE) has been usually employed to fabricate flexible all-in-one supercapacitors, but many HPEs suffer from severe swelling during in situ deposition, resulting in poor mechanical properties or low electrochemical performances of supercapacitors. Here, a swelling resistant poly(2-acrylamide-2-methylpropanesulfonic acid)/polyacrylamide microgel reinforced (PAMPS/PAM MR) double network HPE with high ionic conductivity, good mechanical properties and excellent anti-freezing properties was prepared by two-step radical polymerization and followed by soaking the hydrogel in H3PO4 solution. After the deposition of PANI on the HPE, an all-in-one flexible supercapacitor could be successfully prepared. The PAMPS/PAM MR HPE showed swelling resistance during long-time deposition of PANI. The prepared supercapacitor exhibited excellent tensile strength (234 kPa), high specific capacitance (441 mF cm−2 at 1.0 mA cm−2), high-power density (762.30 μW cm−2) and high flexibility. The supercapacitor also demonstrated outstanding anti-freezing properties. We believe the swelling resistance of the HPE as well as the all-in-one supercapacitor can provide new insights into the next generation of supercapacitors with high electrochemical performances.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
·
IF 5.2
Yaoxia Yang,Xuqin An,Dangxia Wang,Fengyao Guo,Lan Zhang,Xingwei Guo,Dongfei Sun,Xiaozhong Zhou,Zhiwang Yang,Ziqiang Lei
Transition metal phosphide has recently become a research hotspot of electrocatalysis because of its low price and excellent performance. Furthermore, nonmetal heteroatom incorporation into materials is a good way to regulate the surface electronic structure of electrocatalysts to boost their electrocatalytic performance. Based on this, the molybdenum phosphide (MoP) nanoparticles were firstly anchored on nitrogen-doped the porous carbon (NC) substrate by a simple annealing process, and then doped with nonmetal heteroatom selenium (Se) by hydrothermal method . By adjusting the content of selenium, x Se-doped MoP/NC nanoparticle electrocatalysts were successfully synthesized. Among them, the 0.25 Se-MoP/NC electrocatalyst exhibited the best HER catalytic performance, which presented a low overpotential of 141 and 166 mV at 10 mA cm −2 in a 1.0 M KOH and 0.5 M H 2 SO 4 and Tafel slope of 69.91 and 62.93 mV dec −1 for HER, respectively. Benefiting from the doping of selenium, the electronic structure and surface composition of MoP can be effectively regulated, which is conducive to expose abundant active sites and enhance the inherent activity of MoP. Additionally, the N-doped porous carbon substrate also facilitates the diffusion of electrolyte/bubbles and good charge/mass-transfer ability. Furthermore, the electrocatalyst had good stability both in an acidic and alkaline media. This work provides an idea for the synthesis of nonmetal doped-transition metal phosphide as HER electrocatalyst with high efficiency and stability.
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Journal of Water Process Engineering
·
2023
·
IF 7
Renjuan Liu,Qiyue Wan,Yinghao Yu,Xu Zhang,Longcheng Liu,Hai Wang,Chengtao Yue
The development and application of new high-efficiency adsorbent materials for efficient removal of uranium (VI) from nuclear wastewater is of great concern for environment protection. In this study, a novel phosphate-rich macroporous carbon foam was designed and synthesized for efficient uranium (VI) adsorption. Bath adsorption was used to evaluate the uranium (VI) adsorption performance of this carbon foam, and the influences of adsorbent dosage, solution pH and ionic strength on adsorption efficiency were studied. The results demonstrated that the carbon foam was effective adsorbent for uranium (VI) and the adsorption efficiency reached 99 % at 30 °C, pH 7.0 and contact time 2.0 h with an adsorbent dosage of 0.25 g L −1 in 100 mg L −1 uranium (VI) solution. The adsorption process follows better with pseudo-second-order model with a coefficient of correlation of 0.9999 and was more consistent with the Langmuir model with the maximum adsorption capacity as high as 1250 mg g −1 . The distribution coefficient of carbon foam for uranium (VI) reached 15 L g −1 which is higher than that for other ions (0.1–4.4 L g −1 ), demonstrating a good adsorption selectivity. Moreover, this material can be recycled for at least 5 times and can be used in fixed-bed adsorption column for dynamic adsorption of uranium from uranium-containing solutions (5 or 50 mg L −1 ) with adsorption efficiencies up to 99 %. This study's results showed the high efficiency of phosphate-rich macroporous carbon foam in uranium (VI) adsorption and highlighted its great potential in efficient removal of uranium (VI) from nuclear wastewater.
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Polymers
·
2022
·Vol. 14
·期 23
·5269
·
IF 4.967
Wei Ling,Xiongwei Wu,Funian Mo
With the advantages of benign mechanical property, electrochemical stability, and low cost, graphite fibers (GFs) have been widely used as electrodes for vanadium redox flow batteries (VRFBs). However, GFs usually possess inferior electrochemical activity and ion diffusion kinetics for electrode reaction, vastly limiting their application in VRFBs. Here, a 3D carbon nanonetwork coated GFs with multi-heteroatom doping was constructed for application in VRFBs via low temperature polymerization between linear polymer monomer and phytic acid, and subsequent carbonization (900 °C) on the GFs (GF@PCNs-900). Benefiting from the 3D structural features and multi-heteroatom doping (O, N and P), the composite electrode displayed sufficient diffusion of vanadium ions, rapid electron conduction, and highly enhanced electrochemical activity of reactive site on the electrodes. As a result, the GF@PCNs-900 delivered a high discharge capacity of 21 Ah L−1and energy efficiency of above 70% with extraordinary stability during 200 cycles at 200 mA cm−2. Even at a huge current density of 400 mA cm−2, the GF@PCNs-900 still maintained a discharge capacity of 5.0 Ah L−1, indicating an excellent rate of performance for VRFBs. Such design strategy opens up a clear view for further development of energy storage field.Keywords:graphite fibers electrodes;3D nanonetwork;multi-heteroatom doping;high-rate property;vanadium redox flow batteries
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Qingshan Zhao,Xiaojie Tan,Tengfei Liu,Shuai Hou,Wanxin Ni,Hao Huang,Jinqiang Zhang,Zhongxue Yang,Dawei Li,Han Hu,Mingbo Wu
Heteroatom-doped carbon materials have been regarded as sustainable alternatives to the noble-metal catalysts for oxygen reduction reaction (ORR), while the catalytic performances still remain unsatisfactory. Herein, we develop a metal-free adjacent N, P and S-codoped hierarchical porous carbon nanoshells (NPS-HPCNs) through a novel layer-by-layer template coating method. The NPS-HPCNs is rationally fabricated by crosslinking of polyethyenemine (PEI) and phytic acid (PA) on nano-SiO 2 template surface and subsequently coating of viscous sulfur-bearing petroleum pitch, followed by pyrolysis and alkaline etching. Soft X-ray absorption near-edge spectroscopy (XANES) analysis and density functional theory (DFT) calculations prove the engineering of adjacent N, P and S atoms to generate synergistic and reinforced active sites for oxygen electrocatalysis. The NPS-HPCNs manifests excellent ORR activity with a half-wave potential (E 1/2 ) of 0.86 V, as well as promoted durability and methanol tolerance in alkaline medium. Remarkably, the NPS-HPCNs-based Zn-air battery delivers an open-circuit voltage of 1.479 V, a considerable peak power density of 206 mW cm −2 and robust cycling stability (over 200 h), even exceeding the commercial Pt/C catalyst. This study offers fundamental insights into the construction and synergistic mechanism of adjacent heteroatoms on carbon substrate, providing advanced metal-free electrocatalysts for Zn-air batteries and other energy conversion and storage devices.
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JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 3
·1200-1213
·
IF 4.5
He Chunming,Yan Ru,Xue Qingwang,Li Shuxian,Wang Huaisheng
In this work, polyaniline (PANI) and overoxidized polyaniline (oPANI) nanorods doped by phytic acid (PA) with uniform size of 60–100 nm were prepared and modified on glassy carbon electrode (GCE) as non-enzymatic malathion sensors. Doping of PA has deep influence on structural and morphological properties, conductivity and detection performance of electrode materials. The obtained PANI nanorods doped with PA (PA-PANI) possess high affinity toward malathion, and thus the redox reaction of PANI molecules could be hindered and redox currents were inhibited. The electrode reaction process on PA-PANI/GCE is a typical adsorption-controlled process. By contrast, the oPANI nanorods doped with PA (PA-oPANI) presents good catalytic performance to malathion and the electron transfer process was enhanced and redox currents increased. Correspondingly, the electrochemical reduction process on PA-oPANI/GCE is a typical diffusion-controlled process. Both enzyme-free electrochemical sensors exhibit good stability, anti-interference ability, recovery in real samples and excellent detection performance, with a wide linear range of 0.01–200 ppb and low detection limit (1.58 ppt for PA-PANI and 2.23 ppt for PA-oPANI, respectively), indicating that PA-PANI and PA-oPANI could be used as an excellent malathion sensor. Moreover, the PA-oPANI sensor has some degree of reproducibility through further anodic polarity processing, and the detailed application needs to be further explored.
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Materials
·
2022
·Vol. 16
·期 1
·286
·
IF 3.748
Bingying Cheng,Qingqing Zhou,Jiayi Chen,Xu Zhang,Chenglei Zhu,Minghao Wu
The vinyl phytic acid (GPA) was prepared using biophytic acid (PA) and glycidyl methacrylate (GMA), in which double bonds were introduced into the phytic acid molecule to increase the active groups in the phytic acid molecule. Furthermore, itaconic acid (IA) containing two unsaturated double bonds and GPA was polymerized in situ and crosslinked on the surface of cotton fabrics, and flame retardant and crease-proofed fabrics were obtained. The effects of GPA, IA, and the initiator on the flame-retardant and crease-proofing properties of the fabrics were analyzed by a single-factor and double-dip double-nip experiment. A flame-retardant and wrinkle-resistant fabric was obtained when the limiting oxygen index (LOI) and wrinkle recovery angle (WRA) were 28% and 270°, respectively. During combustion, the thermal properties of the fabrics changed; typically, the extrapolated initial temperature (Te) decreased, and moisture release increased. After burning, the fabrics had good shape retention, and the carbon residue content increased to 48%, which effectively inhibited or slowed down the combustion and heat release of the textiles. However, the whiteness, mechanical properties, and washability of the products need to be further improved.Keywords:flame-retardant and crease-proofing finishing;phytic acid;cotton textiles
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高影响因子
危险品化学品经营许可证（带存储）