COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Mengying Luo,Mufang Li,Ying Lu,Ming Xia,Qinghua Zhao,Dong Wang
With the increasing demand of health monitoring and protection, Point-of-Care Testing has developed rapidly due to its convenience and high efficiency. Here, a visual colorimetric nanofiber-based strip with a hierarchically porous structure was prepared for highly sensitive detection of glucose. To facilitate the subsequent testing, the composites with a hybrid nanoflower structure containing glucose oxidase (GOx), horseradish peroxidase (HRP), 3,3′5,5′-tetramethylbenzidine (TMB) and Mn 3 (PO 4 ) 2 were immobilized on a hierarchically porous PVA- co -PE nanofibrous strip. The obtained strip was used to detect glucose, a strong linear correlation (R 2 = 0.996) was found between the color difference and ln(C glucose ) in the range of 0.25–10 mM glucose. The detection limit is 0.14 mM and a discernible color change could be detected with the naked eye at low glucose concentration, indicating that the strip is highly sensitive to glucose. Additionally, a series of interferences substances including NaCl , KCl and urea were also investigated, and the results showed excellent specificity to glucose. Moreover, the strip exhibits good stability in the pH range of 5–7 and maintains excellent glucose detection performance after 60 days. It demonstrates that this strip is a promising candidate for personal diabetes detection.
研究领域:
生物医学工程
·
分析化学
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产品关联
DOI
高影响因子
Cell Death & Disease
·
2023
·Vol. 14
·期 2
·1-17
·
IF 9
Chen Yulian,Jiang Huanguo,Zhan Zhikun,Lu Jindi,Gu Tanwei,Yu Ping,Liang Weimin,Zhang Xi,Liu Shuwen,Bi Huichang,Zhong Shilong,Tang Lan
Converting lipid disturbances in response to energy oversupply into healthy lipid homeostasis is a promising therapy to alleviate hepatosteatosis. Our clinical studies found that a further elevation of triglyceride (TG) in obese patients with the body mass index (BMI) greater than 28 was accompanied by a further reduction of phosphatidylethanolamine (PE). Shorter survival and poor prognosis were shown for the patients with high TG and low PE levels. Liver X receptor alpha ( LXRα ) knockout mice aggravated high-fat diet (HFD)-induced obesity and lipid disorders, making the TG enrichment and the PE decrease more pronounced according to the liver lipidomics analysis. The RNA-seq from mice liver exhibited that these metabolism disorders were attributed to the decline of Atgl (encoding the TG metabolism enzyme ATGL) and Ept1 (encoding the PE synthesis enzyme EPT1) expression. Mechanistic studies uncovered that LXRα activated the ATGL and EPT1 gene via direct binding to a LXR response element (LXRE) in the promoter. Moreover, both the supplement of PE in statin or fibrate therapy, and the LXRα inducer (oridonin) ameliorated cellular lipid deposition and lipotoxicity. Altogether, restoration of lipid homeostasis of TG and PE via the LXRα-ATGL/EPT1 axis may be a potential approach for the management of hepatosteatosis and metabolic syndrome.
研究领域:
分子生物学
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代谢学
·
肝病学
·
药理学
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产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2017
·Vol. 35
·期 7
·897-908
·
IF 1.692
Peng Zhong-chuan,Li Qian,Li Hua-yi,Hu You-liang
Layered materials (MMT, LDH) were successfully modified by chain end functionalized polyethylene via an ion exchange method. The samples were characterized by using elemental analysis, Fourier transform infrared (FTIR) spectrum, X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and thermogravimetric analysis (TGA). The XRD results demonstrated that MMT was successfully exfoliated with the disappearance of [001] peak. For the LDH, the peak [003] moved to a low angle and greatly weakened, indicating that LDH was successfully functionalized and completely intercalated or exfoliated. HDPE/layered nanocomposites were obtained between HDPE and different content of functional layered materials. The SEM and TEM results of nanocomposites showed the layered materials were well dispersed in the HDPE matrix, with a particle size of 100−200 nm.
研究领域:
材料科学
·
高分子化学
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 47
·e54711
·
IF 3
Yin Zhang,Yu Wang,Wei You
Based on derivatization of commercial poly(ethylene- co -vinyl acetate) (EVA), novel macromolecular UV-absorbers with polyethylene (PE) backbones and ferrocene side groups are presented in this study. The structures and properties of the polymers were analyzed using various techniques including Fourier transform infrared spectroscopy (FT-IR), proton nuclear magnetic resonance ( 1 H NMR), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), scanning electron microscope (SEM), and UV visible absorption spectroscopy. UV analysis experiments have shown that PE-grafted ferrocenyl ester (PE- g -FE) and PE-grafted azacyclo-ferrocene (PE- g -AF) with ferrocene side groups have the potential to act as UV absorbers. By using the polymers as additives for commercial PE, the anti-migration experiment demonstrates that PE- g -AF, with a heterocyclic structure, exhibits superior anti-migration performance than the ester-linked PE- g -FE. Furthermore, in comparison to commercial small-molecular UV absorbers (UV-329), the PE- g -AF absorber not only exhibits better UV absorption performance but also demonstrates almost zero migration behavior within the PE matrix.
研究领域:
材料科学
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高分子化学
·
光化学
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产品关联
DOI
高影响因子
Polymers
·
2023
·Vol. 15
·期 5
·1183
·
IF 5
Yanpeng Wu,Tonghui Yang,Yongchang Cheng,Tao Huang,Bin Yu,Qilin Wu,Meifang Zhu,Hao Yu
Preparing flame-retardant polyamide 66 (PA66) fibers through melt spinning remains one of the biggest challenges nowadays. In this work, dipentaerythritol (Di−PE), an eco-friendly flame retardant, was blended into PA66 to prepare PA66/Di−PE composites and fibers. It was confirmed that Di−PE could significantly improve the flame-retardant properties of PA66 by blocking the terminal carboxyl groups, which was conducive to the formation of a continuous and compact char layer and the reduced production of combustible gas. The combustion results of the composites showed that the limiting oxygen index (LOI) increased from 23.5% to 29.4%, and underwriter laboratories 94 (UL-94) passed the V-0 grade. The peak of heat release rate (PHRR), total heat release (THR), and total smoke production (TSP) decreased by 47.3%, 47.8%, and 44.8%, respectively, for the PA66/6 wt% Di−PE composite compared to those recorded for pure PA66. More importantly, the PA66/Di−PE composites possessed excellent spinnability. The prepared fibers still had good mechanical properties (tensile strength: 5.7 ± 0.2 cN/dtex), while maintaining good flame-retardant properties (LOI: 28.6%). This study provides an outstanding industrial production strategy for fabricating flame-retardant PA66 plastics and fibers.Keywords:PA66;Di−PE;flame retardance;melt spinning;flame retardant mechanism
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
PubMed
高影响因子
DENTAL MATERIALS JOURNAL
·
2022
·Vol. 41
·期 5
·731-740
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IF 2.418
Jae-Heon KIM,Soyeon KIM,Van Mai TRUONG,Joo Won LEE,Young-Seok PARK
The relative dentin abrasivity-profilometry equivalent values were compared using non-contact profilometry with three subtypes of regular toothpaste and two subtypes of whitening toothpaste containing sodium bicarbonate and 35% hydrogen peroxide. Bovine dentin specimens were assigned to six groups: regular toothpaste (R): R1 (BAMBOO SALT GUM OINTMENT); R2 (MEDIAN TARTAR ORIGINAL); R3 (PERIOE Alpha), Reference slurry: RS (calcium pyrophosphate), whitening toothpaste (W): W1 (NET. WT); W2 (Vussen 28 WHITENING). Relative dentin abrasion–profilometry equivalent (RDA-PE) was determined by brushing 10,000 times (n=8). The pH of the toothpaste was measured (n=5) and the abrasive constituents of the toothpaste was analyzed by FE-SEM and EDS. The RDA-PE values ranged from 26 to 166, and the pH level ranges were 4.928–9.153. The RDA-PE value of the whitening toothpaste containing hydrogen peroxide was not high compared with that of the regular toothpaste. The RDA-PE values of whitening toothpaste could vary depending on the mechanism and ingredients of the whitening agents.
研究领域:
口腔医学
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材料科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2018
·Vol. 25
·期 5
·1-12
·
IF 1.434
He Yi’nan,Li Qian,Zhu Caijun,Li Huayi,Zheng Shuirong,Xue Zhaohong,Hu Youliang
Polyethylene based polyurethanes (PE-PUs) with 20% ethyl branches were synthesized through hydrogenation reaction of linear and thermoplastic hydroxyl-terminated polybutadiene based polyurethanes (HTPB-PUs), which has not been explored widely. Linear and thermoplastic HTPB-PUs with M
w
ranged from 130~280 kg/mol were synthesized by microwave-assisted reaction. More importantly, we systematically researched a series of reaction conditions to ensure the degree of hydrogenation meanwhile slow down the extent of degradation reaction of urethane bond. In addition, structure and thermal performance of PE-PUs have been investigated in the present work by NMR, FT-IR, DSC and TGA. The M
w
of PE-PUs ranging from 120~207 kg/mol were carried out with a high temperature GPC. Moreover, the degree of crystalline of PE-PUs with 20% ethyl branches at the range of 10% to 33% were further explored by X-ray diffraction, which in turn certify that the PE-PUs possess certain strength but lower than polyethylene with no branches.
研究领域:
材料科学
·
高分子化学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 3
·2115-2130
·
IF 4.682
Huang Yingying,Zhao Hongmei,Chen Shaojuan,Wan Gang,Miao Dagang
The waterproof and breathable wound dressings have undergone continuous and substantial evolution over time. Polyethene films have been widely used to fabricate waterproof dressing. Electrospun biopolymers enable rapid and effective wound healing due to the surface-area-to-volume ratio of electrospun nanofibers and their porous structure. In the present study, the waterproof and breathable bandages were prepared with plasma-treated PE films as the waterproof layer and a blend of polyvinyl alcohol–alginic acid by electronic spinning technique. The composited samples were crosslinked with glutaraldehyde to increase their water stability and mechanical properties. The composited pieces were characterized for their structural properties using SEM, FTIR, DSC, TG. Their water vapour transmission rate, air permeability, tensile strength and antibacterial property were also studied. Cytotoxicity of the dressing was evaluated with human dermal fibroblast cells. The results revealed that the composited PVA/PE dressing shown excellent cooling ability, and improved the waterproof and breathable properties, which enhanced wound healing, compared with the traditional dressing material, such as cotton non-woven. Graphical abstract
研究领域:
生物材料学
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医学工程
·
创伤修复
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Man Chen,Zhe Wang,Shijia Weng,Junkan Yue,Zirui Wang,He Zhang,Zhenxu Huang,Xinda You,Runlai Li,Qiang Fu
The increasing release of oily wastewater from both household and industrial activities has led to a significant environmental challenge. Among the various methods for treating oil-water mixtures, membranes with specialized wettability characteristics have emerged as one of the most effective and cost-efficient approaches. In this field, reducing the thickness of membranes is a key strategy to lessen resistance to mass transfer. This paper describes the creation of a super-hydrophobic, submicron-thin (945 nm) and even transparent (79.99% relative transparency at 600 nm wavelength) composite membrane for oil/water separation. This was achieved by depositing polydivinylbenzene (PDVB) onto ∼170 nm ultrathin freestanding polyethylene (PE) membranes to form hierarchical rough textures. Based on the super-hydrophobicity and high roughness, PE/PDVB composite membrane is enabled to separate oil from water in both mixtures and emulsions of immiscible oil/water. Moreover, PE/PDVB demonstrated a separation efficiency exceeding 99.91% for various water-in-oil emulsions. Impressively, this efficiency could be sustained above 99.87% even after 30 cycles of separation involving surfactant-stabilized isooctane/water emulsions. This performance robustness persisted against various chemical environments such as acidic, alkaline, and saline conditions over prolonged periods. To our knowledge, PE/PDVB is currently the thinnest oil/water purification membrane available, combining both an active layer and support. This work also highlights the practicality of using an ultra-thin support layer for efficient oil/water separation. This work may be at use for membrane scientists who are developing ultra-thin membrane materials and processes for future applications.
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
CONSTRUCTION AND BUILDING MATERIALS
·
2024
·
IF 7.4
Xingyi Zhu,Jiakang Wang,Ming Yang,Jianzhuang Xiao,Yating Zhang,Francisco A. Gilabert
This paper aims to develop an environmentally friendly and low-carbon geopolymer for 3D printing , which has excellent mechanical and rheological performance. The effect of ground granulated blast furnace slag (GGBS), NaOH and sand on mechanical strengths , 3D printing performance and rheological behavior was investigated to determine the optimum mix proportion for 3D-printed geopolymer. Moreover, polyethylene (PE) fibers were introduced to reinforce the performance of 3D-printed geopolymer. Results show that when the ratio of GGBS, NaOH and sand is 1:0.13:2.67, geopolymer exhibits superior mechanical, 3D printing and rheological properties. Increasing the dosage of GGBS and sand leads to an overall increase in the yield stress but a decrease in the consistency coefficient, indicating that it benefits the stacking and fluidity performance of 3D-printed geopolymer. However, with an increase of NaOH content, the stacking performance increases while the fluidity decreases. Although increasing NaOH and sand content benefits the viscosity recovery performance, an increase in GGBS content has an opposite effect. Incorporating PE fibers significantly increases the flexural strength with an increase of up to 27.8 % and 21.3 % in 7-d and 28-d flexural strength , respectively, given a PE fiber volume of 0.6 %. Increasing the volume of PE fibers leads to a significant rise in the stacking performance but a reduction in the fluidity. Furthermore, adding PE fibers negatively affects the geopolymerization but benefits the hydration process given an increase of Si/Al and Si/Ca ratio identified in PE fiber reinforced 3D-printed geopolymer.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
RSC Advances
·
2013
·Vol. 3
·期 43
·20922-20929
·
IF 2.562
Jingjing Huang,Dong Wang,Ying Lu,Mufang Li,Weilin Xu
Antifouling nanofibers with zwitterionic materials on surfaces that can prevent the nonspecific adhesion of biomolecules and microorganism are in demand for high efficiency biosensors and affinity membranes. The functionalization of zwitterionic sulfobetaine on surfaces of PVA-co-PE nanofiber membrane via click chemistry is performed employing two synthesis routes and reported in this paper. PVA-co-PE nanofiber membranes were activated with cyanuric chloride, and then surface functionalized with sodium azide or 2-propynylamine to prepare “clickable” nanofibers with azide or alkynyl groups, respectively. The zwitterionic sulfobetaine was finally “clicked” onto PVA-co-PE nanofiber membranes. The successful surface functionalizations of PVA-co-PE nanofiber membrane were confirmed with FTIR-ATR, Raman spectroscopy, XPS and EDS. The analysis of element composition using XPS indicated that alkynylation of activated PVA-co-PE nanofiber membranes can “click” more sulfobetaines on nanofiber surfaces than surface azidation. SEM results showed that functionalized PVA-co-PE nanofiber membranes maintained well-defined nanofibrous morphology. PVA-co-PE nanofiber membranes with zwitterionic sulfobetaine demonstrated excellent antifouling performance by effectively resisting bovine serum albumin (BSA) protein adsorption.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
Advanced Materials Interfaces
·
2018
·Vol. 6
·期 1
·1801330
·
IF 4.834
Muhammad Waqas,Shamshad Ali,Weiqiang Lv,Dongjiang Chen,Bismark Boateng,Weidong He
Highly efficient and thermally stable polyethylene-hexagonal boron nitride/poly(vinylidene fluoride-hexafluoropropylene) (PE-BN/PVDF-HFP) bilayer separator with microporous structure is prepared, for the first time with a wet chemistry method. The incorporation of hexagonal boron nitride particles in PE matrix promotes the interfacial interaction between PE and PVDF-HFP layers to prevent separation of layers and supresses dendrite growth owing to the strong adsorption energy with polymers, large interactive surface area, and superior mechanical capability. The PVDF-HFP layer provides additional thermally stable backbone while its inherent hydrophilic property and highly porous structure improve the overall performance of the separator. The bilayer separator owns a high electrolyte uptake of 348% and a thermal shrinkage of 6.6% upon annealing at 140 °C for 1 h. The lithium iron phosphate/lithium cell with the as-prepared separator owns a high ionic conductivity up to 4.4 × 10 −4 S cm −1 , and a room-temperature capacity of 120 mAh g −1 at 2 C with a 95% capacity retention after 500 cycles and a capability of 108 mAh g −1 at 4 C. The PE-BN/PVDF-HFP separator is a promising alternative of traditional multilayer separators for high-performance lithium-ion batteries.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）