PACKAGING TECHNOLOGY AND SCIENCE
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2018
·Vol. 31
·期 11
·747-753
·
IF 1.808
Hong-Biao Chen,Chang-Ying Hu
Polypropylene nanocomposites have great potential applications in food packaging and the evaluation of the migration of nanoparticles is important for the food safety. Three types of polypropylene (homopolymer of polypropylene, PPH; blockcopolymer of polypropylene, PPB; random copolymer of polypropylene, PPR) nanocomposite films with or without coupling agent were tested in 3% acetic acid as food simulant. The migration amount of zinc was quantified by inductively coupled plasma atomic emission spectroscopy. The surface morphology and crystallinity were explored by field emission scanning electron microscopy, atomic force microscopy, and differential scanning calorimetry, respectively. The results showed that the incorporation of titanate coupling agent could inhibit ZnO-NPs migration from the films since titanate coupling agent could improve the interface between ZnO-NPs and PP molecular chain segment. Furthermore, the migration rate of zinc was dependent on the degree of crystallinity ( X c ) of PP and their order of the maximum migration rate was PPH, PPB and PPR. The notable phase separation could be observed from the morphology of nano-ZnO/PPH, while ZnO-NPs could be well dispersed in the PPR matrix. Thus, ZnO-NPs restricted the molecular chain segment of PPH and reduced its X c from 88.6% to 73.2%. The results demonstrated that titanate coupling agent and PPR could inhibit the migration of ZnO-NPs significantly.
研究领域:
食品安全
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聚合物纳米复合材料
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材料科学
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迁移研究
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2026
·
IF 3.1
Yu Wang,Wenxiong Chen,Meng Pan,Weijie Liang,Jiahao Lu,Rui Feng,Yang Zhang
Polypropylene (PP) is extensively implemented in electronic equipment and power systems owing to its superior performance, such as high breakdown strength ( E b ), low dielectric loss (tan δ ), and outstanding self-healing capability. However, its low dielectric constant ( ε r ) and restricted energy density ( U e ) obstruct the miniaturization and integration of dielectric capacitors. To address these limitations, PP/PMMA/PP-g-MAH dielectric blend films were prepared via the melt blending and hot-pressing process. The transesterification reaction between the pendant anhydride groups of PP-g-MAH and the ester groups of PMMA forms ester bonds, which reduces the interfacial free energy and, in turn, significantly improves the compatibility between PP and PMMA. The blend film containing 4 wt% PP-g-MAH exhibits a high U e of 7.53 J/cm 3 at 502 MV/m, with an excellent charge–discharge efficiency ( η ) of 97.8%. This work presents a feasible strategy for developing all-organic polypropylene-based dielectric film with superior energy storage performance.
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DOI
高影响因子
Materials
·
2018
·Vol. 11
·期 1
·111
·
IF 2.467
Hongda Chen,Jihui Wang,Aiqing Ni,Anxin Ding,Xia Han,Ziheng Sun
In order to improve the efficiency of intumescent flame retardants (IFRs), a novel macromolecular charring agent named poly(ethanediamine-1,3,5-triazine-p-4-amino-2,2,6,6-tetramethylpiperidine) (PETAT) with gas phase and condense phase synergistic flame-retardant capability was synthesized and subsequently dispersed into polypropylene (PP) in combination with ammonium polyphosphate (APP) via a melt blending method. The chemical structure of PETAT was investigated by Fourier transform infrared spectroscopy (FTIR), and1H nuclear magnetic resonance (NMR) spectroscopy. Thermal properties of the PETAT and IFR systems were tested by thermogravimetric-derivative thermogravimetric analysis (TGA-DTG) and thermogravimetry–Fourier transform infrared spectroscopy (TG-FTIR). The mechanical properties, thermal stability, flame-retardant properties, water resistance, and structures of char residue in flame-retardant composites were characterized using tensile and flexural strength property tests, TGA, limiting oxygen index (LOI) values before and after soaking, underwritten laboratory-94 (UL-94) vertical burning test, cone calorimetric test (CCT), scanning electron microscopy with energy dispersive X-ray spectrometry (SEM-EDXS), and FTIR. The results indicated that PETAT was successfully synthesized, and when the ratio of APP to PETAT was 2:1 with 25 wt % loading, the novel IFR system could reduce the deterioration of tensile strength and enhance the flexural strength of composites. Meanwhile, the flame-retardant composite was able to pass the UL-94 V-0 rating with an LOI value of 30.3%, and the peak of heat release rate (PHRR), total heat release (THR), and material fire hazard values were considerably decreased compared with others. In addition, composites also exhibited excellent water resistance properties compared with traditional IFR composites. SEM-EDXS and FTIR analyses of the char residues, as well as TG-FTIR analyses of IFR were used to investigate the flame-retardant mechanism of the APP/PETAT IFR system. The results indicated that the efficient flame retardancy of PP/IFR composites could be attributed to the synergism of the free radical-quenching and char layer-protecting mechanisms in the gas phase and condense phase, respectively.
研究领域:
材料科学
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高分子化学
·
消防安全工程
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分析化学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2026
·Vol. 61
·期 23
·16510-16522
·
IF 4.4
Hu Zhenwei,Du Pengcheng,Zhang Yong,Wang Yadong
The uncontrollable growth of lithium (Li) dendrites severely hampers the commercialization of lithium metal batteries (LMBs). Herein, a highly integrated PP/SnO 2 /PP sandwich-structured separator was designed and fabricated. Utilizing an innovative solvent-induced bonding and hot-pressing process, lithiophilic SnO 2 nanoparticles were precisely anchored within a dual-layer polypropylene framework. Morphological and chemical characterizations (SEM, XPS, and EDS) confirmed the uniform distribution and intimate interfacial contact of the modification layer. Electrochemical measurements demonstrated that the sandwich separator enables exceptionally high Coulombic efficiency at a current density of 1 mA cm −2 and imparts superior cycling stability to LFP||Li cells. Mechanistic investigations reveal that the SnO 2 interlayer functions not merely as a physical barrier but, more importantly, as a ‘‘electrochemical trap.’’ Upon contact with the interlayer, Li dendrites trigger an in situ ‘‘micro-cell reaction,’’ which proactively eliminates dendrite tips via electrochemical ablation. This strategic shift from ‘‘passive blocking’’ to ‘‘proactive elimination’’ offers a novel perspective for designing high-safety lithium metal batteries. Graphical abstract Schematic diagram of the mechanism for an electrochemical trapping device used to actively eliminate lithium dendrites. The alternative text for this image may have been generated using AI.
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DOI
高影响因子
MARINE POLLUTION BULLETIN
·
2023
·
IF 5.8
Minggu Zhang,Na Liu,Lei Hou,Chao Li,Chengliang Li
Both non-degradable and biodegradable plastics can act as vectors of diverse organic pollutants. In this study, two types of biodegradable microplastics [poly (butylene adipate- co -terephthalate) (PBAT) and polylactic acid (PLA)] and one type of non-degradable microplastics [polypropylene (PP)] were selected to investigate the impacts of ultraviolet (UV) irradiation for one month on microplastics surface modification and their adsorption behaviors for chlorpyrifos (CPF). The study revealed that PBAT held the largest adsorption capacity, and PLA held the fastest adsorption rate. The UV irradiation diminished the adsorption capacities on PLA and PP but enhanced the adsorption capacities on PBAT. The adsorption capacity normalized by specific surface area revealed that specific surface area was the dominant factor for affecting the adsorption capacities on PP and PLA after UV irradiation. These findings further clarify the interaction between CPF and microplastics, and provide a theoretical basis for assessing the ecological risk of microplastics in water.
研究领域:
环境科学
·
生态学
·
污染研究
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DOI
PubMed
高影响因子
ENVIRONMENTAL TECHNOLOGY
·
2023
·
IF 2.8
Zhou Yanwen,Cai Feng,Li Wei,Qiu Jian,Xu Liang,Liu Qianyu,Zhang Yinlong
The post-treatment of recycling the fine photocatalyst nanoparticles restricts their application. In this study, a new photocatalytic material was synthesized by immobilizing the N-doped TiO2 and graphene oxide (GO) composite on polypropylene (PP) (N–TiO2/GO/PP) fibre sheet, and characterized based on X-ray diffraction spectroscopy (XRD), Raman spectroscopy and Scanning Electron Microscope (SEM). The photocatalytic activity was evaluated using roxithromycin (ROX) as a typical antibiotic pollutant. XRD, Raman spectra and SEM images proved that N–TiO2/GO/PP fibre sheet was successfully synthesized. The photocatalytic degradation of 10 mg L−1 ROX can reach up to 90% and the degradation rate constant was 0.2299 h−1 in surface water with the application amount of TiO2/GO/PP fibre sheet of 24.6 cm × 2.7 cm and reaction time of 9 h under the irradiation of simulated sunlight. The application amount of TiO2/GO/PP fibre sheet, initial concentration of ROX and water matrix significantly affect the degradation of ROX. A low concentration of natural organic matter (NOM) slightly promoted the degradation of ROX, while a high concentration of NOM significantly inhibited the degradation of ROX. Alkaline condition (pH 8–9) is favourable for the photocatalytic degradation of ROX by TiO2/GO/PP fibre sheet. The photocatalytic reactivity of the TiO2/GO/PP fibre sheet showed no significant decrease after three runs. Two primary degradation products of ROX were identified and they showed lower ecotoxicity than ROX. The results demonstrate that the new synthesized TiO2/GO/PP fibre sheet shows promising application prospects in the treatment of antibiotics in wastewater and surface waters.
研究领域:
环境科学
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材料科学
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生物学
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DOI
PubMed
高影响因子
FIBERS AND POLYMERS
·
2025
·
IF 2.3
Zhang Dewei,Sun Hui,Yu Bin,Xie Youxiu,Li Fengchun
The removal of organic dyes from wastewater using manganese dioxide (MnO 2 ) and its composites has garnered significant attention, but recycling them remains challenging. In this study, MnO 2 was combined with polypropylene melt-blown nonwoven material (PP MB) in a simple way to prepare a composite material, which makes MnO 2 easy to be recycled and reused. MnO 2 with sea urchin-like structure were synthesized using a hydrothermal method and subsequently anchored onto the surface of PP MB modified by polydopamine (PDA) in various loading concentration, resulting in the preparation of MnO 2 @PP MB for removing organic dyes from wastewater. The size of the synthesized MnO 2 is about 6 μm and its specific surface area is 21.73 m 2 /g. When the loading concentration of MnO 2 is 1 mg/mL, the pH of adsorption solution is 3, and the adsorption solution temperature is 25 °C, the removal efficiencies of MnO 2 -1@PP MB for rhodamine B (RhB), methyl blue (MB), methyl orange (MO), and Carmine (CRM) in water all are achieved 99.00% in an impressive rate. Remarkably, even after undergoing twenty adsorption-desorption cycles, the removal efficiency for of MnO 2 -1@PP MB for RhB remained consistently around 99.00%. Furthermore, it was found that the removal behavior of MnO 2 @PP MB for RhB follows the pseudo-second-order kinetic model, meaning that is the adsorption process is primarily driven by chemical interactions. Compared to pristine PP MB, the mechanical properties of MnO 2 -1@PP MB just slightly decrease.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
MATERIALS SCIENCE FORUM
·
2019
·
IF 0
Shan Shan Liu,He Yi Ge,Yu Zou,Juan Chen
Maleic anhydride grafted polypropylene compatibilizer (MAPP) and chitosan (CS) were mixed and used as a compound coupling agent to modify the PP matrix. 5 wt% NaOH and 10 wt% NaOH aqueous solution were used to treat corn stalk fiber (CSF), respectively. The effect of the complex coupling agent and the alkali treatment on the mechanical properties of CSF/PP composite was investigated. Morphological observation of the fracture surfaces was accepted to confirm CSF dispersion and wetting with the help of SEM. The results of the water absorption further demonstrated the binding of the interface between the CSF and the PP matrix. The wetting of the CSF in the PP was improved with the addition of the complex compatibilizer (5% MAPP + 5% CS). The formation of chemical bonding between the fiber and the matrix resulted in enhancing the interfacial compatibility between them. Compared with the pure PP, the flexural strength of 15-UT-5MAPPCS (63.14 MPa) and 15-UT-5MAPPCS (69.35 MPa) increased by 22.5% and 34.5%, respectively. The complex compatibilizer can replace alkaline treatment process to improve the mechanical properties of the composite.
研究领域:
材料科学
·
生物学
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DOI
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jianbo Li,Guijie Yin,Yannan Wang,Yang Xiang,Ning Yu,Xu Li,Yinzhu Jiang,Maowen Xu,Xuan Zhang
To meet high-standard requirements for next generation lithium-ion batteries (LIBs), reinforce the functions of separator are becoming imperative and urgent. In this work, we successfully fabricated a multifunctional separator, namely, UIO-66-F@PP, which enabled the test battery to achieve a significant improvement in electrochemical performance and safety. The modified separator UIO-66-F@PP can finely regulate the ion transfer by facilitating the Li + transport due to the orderly porous structure and the negatively charged functional group (−F), resulting in a higher ion conductivity ( σ ) of 0.91 mS cm −1 and a larger Li + transference number ( t Li + ) of 0.78. By analyzing the Sand’s time ( t sand ), it was found that the lithium dendrite was suppressed by the modified separator UIO-66-F@PP. Besides, the symmetric battery Li//Li assembled with UIO-66-F@PP exhibited a stable lithium plating/stripping cycle over 2000 h. The battery of LFP//Li with UIO-66-F@PP demonstrated an excellent rate performance with a discharging specific capacity of 114 mAh g −1 at 10C. Moreover, the burning and heat shrinkage tests showed that the modified separator UIO-66-F@PP has a self-extinguishing character and a high thermal stability even at 190 °C, indicating that the modified separator has the capability to endow the LIBs with high safety.
研究领域:
材料科学
·
能源技术
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DOI
高影响因子
Materials
·
2021
·Vol. 14
·期 8
·1811
·
IF 3.623
Peng Zhang,Xuan Wang,Jiaming Yang,Yongqi Zhang
Blending polypropylene (PP) with thermoplastic elastomer SEBS can effectively improve the mechanical toughness of PP, thus leading to the promise of SEBS/PP as the primary insulation material for high voltage alternating current (HVAC) cables. However, the growth of electrical trees during cable operation limits the application of SEBS/PP. In this paper, acetylation reaction is used to construct acetophenone group at the end of the benzene ring on SEBS so that it has the effect of both a toughening agent and a voltage stabilizer. Then PP was melt blended with acetylated SEBS (Ac-SEBS), and the effects of Ac-SEBS on the mechanical properties, electrical tree resistance, alternating current (AC) breakdown strength, and dielectric spectrum of PP were mainly investigated with reference to PP and SEBS/PP. The results showed that Ac-SEBS with 30% content could enhance the mechanical toughness of PP and improve the electrical tree resistance and AC breakdown strength of SEBS/PP. The AC breakdown field strength of Ac-SEBS/PP reached the highest when the acetylation level was 4.6%, which was 9.2% higher than that of SEBS/PP. At this time, Ac-SEBS was also able to absorb high-energy electrons through the keto-enol interchange isomerization reaction, which inhibited the initiation and growth of electric trees and caused the development of electric dendrites in a jungle-like manner. Moreover, the dielectric loss factor of AC-SEBS/PP in power frequency is within the allowable range of industry. Therefore, Ac-SEBS/PP is expected to be applied to HVAC cables, thus further improving the efficiency of HVAC power transmission.
研究领域:
材料科学
·
电气工程
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DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Xinyi Zhang,Jiaxin Lu,Yan Wang,Chunning Chen,Hongkun Zhao,Jingtong Zhai,Rui Li,Nan Lu
A three-dimensional superhydrophobic porous pyramidal silicon decorated with silver nanoparticles was developed for high-performance SERS detection. • The hierarchical porous structure enhances light absorption and plasmonic “hot spots”. • The superhydrophobic surface enables efficient analyte enrichment by reducing the droplet contact area and mitigating the coffee-ring effect. • The substrate exhibits excellent sensitivity, high enhancement factor, and outstanding reproducibility. • It was successfully applied for the sensitive detection of trace pollutants in real samples. Surface-enhanced Raman scattering (SERS) enables label-free detection with molecular fingerprinting, but its application is often limited by complex fabrication processes and nonuniform signal distributions. To address these issues, we developed a three-dimensional superhydrophobic substrate consisting of porous pyramidal Si decorated with silver nanoparticles (PP-Si@AgNPs). Compared with the conventional Si@AgNPs and Py-Si@AgNPs, the hierarchical structure enhances light absorption to 78% at 532 nm and increases the specific surface area exposed under the laser spot. The superhydrophobic surface (152.6°) reduces the droplet contact area by 88.6%, increasing the surface density of analyte molecules by 8.8-fold and enhancing the SERS intensity by 7.85-fold. Using rhodamine 6G as a probe molecule, the substrate presents a detection limit of 10 −13 M and an enhancement factor of 5.85 × 10 9 . The relative standard deviations of 3.34% and 6.39% indicate excellent spot-to-spot and batch-to-batch reproducibility. Moreover, the substrate enables low-concentration detection of malachite green in fish skin extract (7.8 × 10 −11 M), thiram in apple extract (1.6 × 10 −8 M), and melamine in milk (1.0 × 10 −8 M), highlighting strong potential for practical analytical applications. Download: Download high-res image (50KB) Download: Download full-size image
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高影响因子
FIBERS AND POLYMERS
·
2024
·
IF 2.2
Sun Yining,Sun Hui,Yu Bin,Yang Xiaodong,Xu Tao
Polypropylene melt-blown nonwoven material (PP MB) was first modified by polydopamine to improve the surface hydrophilicity. Then cobalt hydroxycarbonate Co(CO 3 ) 0.5 (OH)∙0.11H 2 O(CCO) was synthesized on the surface of the modified PP MB(M-PP MB) via a simple in suit hydrothermal method, and CCO@M-PP MB was obtained. The results showed that when the ratio of Co(NO 3 ) 2 ·6H 2 O to CO(NH 2 ) 2 was 1:5 and the Co(NO 3 ) 2 ·6H 2 O concentration was 0.03 mol/L, CCO with a sea urchin-like morphology appeared on the surface of M-PP MB. Compared with PP MB, the water contact angle (WCA) of CCO@M-PP MB reduced to 0°. When n-hexane was used as the oil phase, the underwater oil contact angle (UWOCA) of CCO@M-PP MB could be over 140.63°. CCO@M-PP MB could efficiently separate various oil–water mixtures, the oil included n-hexane, petroleum ether, carbon tetrachloride, dichloromethane, peanut oil, and olive oil. When n-hexane was used as the oil phase, the oil–water separation efficiency of CCO@M-PP MB was over 98.76%. Throughout 50 cycles, the oil–water separation efficiency of CCO@M-PP MB was never lower than 97.02%.
研究领域:
材料科学
·
环境工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）