JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY
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2018
·
IF 3.165
Fanlei Kong,Zhihong Nie,Zhongpo Liu,Shibin Hou,Jiangfeng Ji
The technique of anterior cervical corpectomy and fusion (ACCF) for strut grafting has become a widespread and actively applied for many cervical complaints including cervical degeneration of the intervertebral disks , cervical trauma , cancer, rheumatoid arthritis and multilevel cervical spondylotic diseases. To avoid the complications of the old techniques, the construct stability and long anterior screw-plate designs of the bone strut have been improved by using effective biomaterials. The nanostructured hydroxyapatite (HAp) incorporated with biocompatible polymer matrixes is an effective biomedical material and creating a functional properties applied for different tissue replacements such as dental, hips, knees , tendon and ligaments and tissue repair for maxillofacial reconstruction , stabilization of the jaw bone and spinal fusion . In the present investigation, we have successfully designed cylindrical nano titanium dioxide (n-TiO 2 ) interbody fusion with anterior plate fixation . The n-TiO 2 incorporated HAp/ Polyetheretherketone (PEEK) nanocomposite strut has a superior mechanical properties and larger contact area with high fusion rates as compared with the HAp/PEEK strut in the absence of n-TiO 2 nanoparticles . It is highly able to provide appropriate strength and biological activity similar to the conventional titanium cage and also mainly it has been minimizes subsidence value. The synthesized novel material of n-TiO2 incorporated HAp/PEEK nanocomposite strut is scientifically given effective outcomes for fusion and reconstruction of the ACCF.
研究领域:
生物医学工程
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骨科手术
·
材料科学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2023
·
IF 10.9
Yiwu Pan,Xiangyu Jin,Hebing Wang,He Huang,Can Wu,Xiaojie Yan,Changqing Hong,Xinghong Zhang
High-performance thermal protection materials (TPMs) for spacecraft are becoming current research hotspots. Lightweight polymer-based ablators are considered to be the most promising candidates for TPMs due to their excellent designability and versatility. In this study, a unique nano-TiO 2 coated needled carbon fiber felt/phenolic resin aerogel composite (TiCF/PR) is reported. Wherein the anatase nano-TiO 2 was in-situ coated on the surface of carbon fibers uniformly through the sol-gel and calcination method, then, the phenolic resin aerogel was in-situ synthesized in the nano-TiO 2 coated needled carbon fiber felt (TiCF) preform through vacuum impregnation and solvothermal method. The as-prepared aerogel composite possesses a low density (0.30–0.32 g/cm 3 ), low thermal conductivity (0.034 and 0.312 W/(m K) in the z and xy directions), and excellent thermal stability with 13.86% residual weight at 1300 °C in air. It is worthwhile to note that the TiCF/PR composite exhibits excellent antioxidant ablation and infrared (IR) radiation shielding properties in a high-temperature heating environment. With an oxygen-acetylene blaze heating of 1.5 MW/m 2 for 150 s, the linear ablation rates decreased by 13.4%, and the backside temperature reduced from 322.3 to 179.1 °C compared to that of the sample without nano-TiO 2 coating. The experimental and theoretical analysis showed that the present TiCF/PR nanocomposite has competitive and potential application prospects in the field of future TPMs.
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DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Hui Liu,Long Yan,Feiyue Wang
A unique hybridized antioxidant named TiO 2 -KH550-PA, of which silane modified nano-TiO 2 particles were grafted with 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid by acylation reaction, was applied to intumescent fire-retardant coatings for cable. Through fire protection test, contact angle test , thermogravimetric test and UV-ageing test, the effects of TiO 2 -KH550-PA on hydrophobicity , flame retardancy, smoke suppression, anti-ageing and charring performance for coatings were evaluated. The obtained results indicate that the TiO 2 -KH550-PA can enhance the hydrophobicity of the coating, thereby reducing the adhesion of dust on the coating surface . Additionally, TiO 2 -KH550-PA has a greatly promoting role in strengthening the fire protection abilities of the coating, but an appropriate amount is the key. Compared to coatings without composite, the intumescent fire-resistant coating for cable containing 1 wt% TiO 2 -KH550-PA (IFRCC 2 ) exhibits excellent fire protection performance, including a prolongation by 2.6 times in failure time, an increase by 1.7 times in char layer height, and an increase by 0.4 times in light transmittance for smoke density test. Furthermore, the presence of TiO 2 -KH550-PA can also strengthen the oxidation resistance , charring ability and char layer stability of the coating, when the remaining mass of IFRCC 2 increases to 49.0 % at 800 °C. The anti-ageing performance test demonstrates that the TiO 2 -KH550-PA can absorb ultraviolet light , eliminate free radicals, and raise the structural stability of the coating, thus reinforcing the durability of the fire resistance for the coating.
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高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2023
·
IF 6.8
Renfei Zhu,Chunlan Liu,Jingyu Wang,Li Zou,Fan Yang,Xia Chi,Jiansheng Zhu
Titanium dioxide nanoparticles (n-TiO 2 ) could enhance the bioavailability and toxicity of coexisting organic contaminants in the aquatic environment. This study attempted to investigate the combined effects of n-TiO 2 and difenoconazole (DIF) on the neurodevelopment of zebrafish and the underlying mechanisms. In this study, zebrafish embryos were exposed to n-TiO 2 (100 μg/L), DIF (0, 0.1 and 0.5 mg/L) and their mixtures from 4 to 96 h post fertilization (hpf) and neurotoxicity was evaluated. Our results indicated that n-TiO 2 adsorbed DIF into the brain of zebrafish and significantly enhanced the bioaccumulation of DIF and n-TiO 2 in the 0.5 mg/L co-exposure group. 100 μg/L n-TiO 2 was not developmentally toxic to the zebrafish larvae, but it exacerbated DIF-induced neurobehavioral alterations in the zebrafish larvae. n-TiO 2 also aggravated DIF-induced suppression of central nervous system (CNS) neurogenesis in Tg ( HuC:egfp ) zebrafish, motor neuron axon length in Tg ( hb9:egfp ) zebrafish, and downregulation of neurodevelopmental genes ( elavl3 , ngn1 , gap43 , gfap and mbp ). In addition, DIF elevated oxidative stress by accumulation of reactive oxygen species (ROS) and inhibition of antioxidant enzymes, and triggered apoptosis by upregulation of p53 , bax , bcl-2 and caspase-3 , which were markedly intensified in the presence of n-TiO 2 . Moreover, vitamin C (VC) ameliorated n-TiO 2 /DIF-induced abnormal locomotor behaviors and neurotoxicity by inhibiting oxidative stress and apoptosis, indicating that oxidative stress and apoptosis are involved in n-TiO 2 /DIF-induced neurotoxicity. Taken together, our data indicated that n-TiO 2 enhanced the accumulation of DIF and heightened oxidative stress and apoptosis, thereby inducing neurotoxicity. This study exemplifies the importance of the toxicity assessment of chemical mixtures and novel insights to mitigate their combined toxicity.
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DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 32
·e52750
·
IF 3.057
Jingjing Li,Yihua Cui,Kangle Wu,Chuangchuang Sun
UV curing three-dimensional printing (3DP) technology has been developing rapidly due to its high molding accuracy and low cost. However, the curing shrinkage rate of the existing UV curing 3DP materials is still high. The use of inorganic particles to reduce the curing shrinkage of 3D printing materials has received more and more attention in recent years, but the poor dispersibility of inorganic particles in the photosensitive resins has not been effectively solved. In this paper, nano-TiO 2 particles were treated by KH570 in advance and the surface of which were grafted by thiol-terminated hyperbranched polymer (THBP), hereby THBP@TiO 2 was obtained. The results showed that by incorporating of 5 wt% THBP@TiO 2 , the volume shrinkage rate of epoxy acrylate (EA)-based photosensitive resins decreased from 8.95% to 4.18%. The THBP@TiO 2 combined the anti-shrinkage mechanism of thiol-based hyperbranched polyester with that of and inorganic nanoparticles. Otherwise, surface grafting of THBP may effectively improve the dispersibility of nano-TiO 2 particles in EA-based photosensitive resin by reducing the nano-TiO 2 particles surface energy, and increase the load transfer capacity. The impact strength of 5 wt% THBP@TiO 2 modified photosensitive resin increased from 11.2 to 18.1 kJ/m 2 .
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2021
·
IF 7.312
Yu Liu,Yu Xiang,Hui Xu,Huili Li
Photocatalysis is highly efficient for the treatment of dyeing wastewater. However, the wastewater still contains a large amount of nano-TiO 2 after photocatalysis. In order to reduce the cost of nano-TiO 2 , different coagulants were used to improve the solid/liquid separation efficiency. At the same time, the reuse of flocs has raised increasing attention after coagulation. In this study, we report on the recycling of flocs for the production of AlCl 3 and TiO 2 formed flocs (AT 1 ) and Al 13 and TiO 2 formed flocs (AT 2 ) through a simple calcination process. Results indicated the flocs formation processes under different concentration of CO 3 2– were Al species distribution and coagulant dosage dependent. Without HA molecules, the reaction between Al-based coagulants and CO 3 2– are the controlling steps in the coagulation process, and Al a and Al b species had different reaction processes. The influence of HA molecules was also studied, and the HA-Al aggregates which could bridge the TiO 2 nanoparticles , and thus induce sweep flocculation . Consequently, highly enhanced aggregation rate, due to the heteroaggregation between these aggregates and TiO 2 was observed. After calcination, the AT 2 -10 and AT 2 -20 (CO 3 2– : 10, 20 mmol/L) with petal-like structures (mesoporous), relatively high specific surface areas, i.e. 83.98 m 2 /g and 78.38 m 2 /g and high photocatalytic degradation, i.e. 72.79%, 67.78% (compared to nano-TiO 2 , AT 1 -10 and AT 1 -20), were obtained. Additionally, oxygen vacancy (OV) was generated on the surface of the recycled AT 2 -10 and AT 2 -20, which display strong photocatalytic performance for the degradation of MO greater than 65%, under ultraviolet (UV) irradiation and without any sacrificial reagents. This study proposes a new perspective on recycling coagulated flocs for practical application in wastewater treatment .
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Yang Yang,Lei Huang,Yongshi Huang,Mahmud Sakil,Kaige Dong,Jingxin Yang,Wei Zhang,Gaosheng Zhang,Mengmeng Jia,Zhu Xiong
Accumulation of pollutants poses significant challenges to advanced membrane process, impacting efficiency and increasing operational costs. Fulvic acid and its analogues, widely distributed natural organic compounds, degrade water quality and produce by-products in traditional water treatment processes. The presence of even trace heavy metals in water, at the same time, can have a long-term impact on human health. Addressing these issues, we developed a novel TiO 2 -polydopamine (PDA) modified polyvinylidene fluoride (PVDF) membrane (TiO 2 -PDA@PVDF) through an environmental-friendly and low-cost sol-gel method. The membrane features dense nano-TiO 2 coverage, facilitated by a crosslinked dopamine layer, enabling in-situ growth of a functional TiO 2 layer via hydrothermal treatment. This hybrid membrane demonstrates superior adsorption, permeation, and photocatalytic self-cleaning capabilities. Performance analysis demonstrates over 90 % removal efficiency for humic acid and 85–95 % for heavy metals (Tl + , Sb 3+ , and Cr 6+ ). During humic acid separation, the initial flux of nano-TiO 2 membrane was 432 L/m 2 ·h, however, the flux attenuation (63 %) was smaller than unmodified membrane (91 %). Notably, the membrane maintained a flux loss ratio of less than 10 % after multiple operations and self-cleaning cycles, showcasing its robustness and sustainability. The TiO 2 -PDA@PVDF membrane not only effectively intercepts and adsorbs contaminants but also recovers its performance through photo-regeneration facilitated by trace hydrogen peroxide and UV light. These results highlight the membrane's potential for sustainable water purification, presenting a promising solution for both fouling mitigation and enhanced efficiency.
研究领域:
环境科学
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材料科学
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水处理技术
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DOI
高影响因子
JOURNAL OF POLYMERS AND THE ENVIRONMENT
·
2022
·Vol. 30
·期 11
·4550-4561
·
IF 4.705
Jiang Longwei,Wang Fenghui,Xie Cancan,Xie Xinyan,Meng Xiangyi,Zhang Huajiang
In this study, active packaging films were developed by incorporating nano TiO 2 and pomegranate peel extract (PPE) into high-amylose corn starch (HCS)/konjac glucomannan (KG) matrix for the first time. The aim of present work was to investigate the influence of nano TiO 2 and PPE on physicochemical and functional properties of HCS/KG-based films. The films were characterized by XRD, FT-IR and SEM, and the tensile, antibacterial and antioxidant properties were evaluated. The results showed that the crystallinity of the composite films was increased and the microstructure was more uniform and dense after adding TiO 2 and PPE, and the intermolecular hydrogen bonds were formed between TiO 2 , PPE, and film matrix. Incorporation of TiO 2 and PPE significantly improved tensile properties and decreased water solubility and water vapor permeability of the composite films (p < 0.05). HCS/KG films incorporated with TiO 2 and PPE presented remarkable antibacterial activity against Escherichia coli and Staphylococcus aureus , and exhibited strong antioxidant activity due to the polyphenol compounds in PPE. All films properties not only changed with the content of TiO 2 and PPE, but also improved synergistically when they were added together. The developed composite films were used as coating for the preservation of Agaricus bisporus , and the weight, firmness and total soluble solids of A. bisporus were significantly maintained and browning was effectively inhibited during storage. Therefore, HCS/KG composite film/coating containing TiO 2 and PPE has great potential as an attractive commercialization technology to ensure the quality and extend the shelf life of foods.
研究领域:
食品科学
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材料科学
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生物技术
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DOI
高影响因子
CHEMICAL PAPERS
·
2018
·Vol. 72
·期 11
·2871-2877
·
IF 0.963
Wang Yazhen,Li Rifang,Jia Hongge,Yang Guoxing,Di Yutao,Xu Chenxi,Ma Liqun,Zhang Hui,Zhou Yongli,Zang Yu,Xu Shuangping,Sun Zhaoyang,Zu Liwu,Yue Chenge,Lan Tianyu
A novel peroxy group-containing silane coupling agent was synthesized and anchored on the surface of titanium dioxide nanoparticles (nano-TiO 2 ) to form an immobilized-initiator-modified nano-TiO 2 species. In this study, the kinetic parameters of the peroxy group-containing silane were tested and assessed using DSC. The pre-exponential factor ( A d ) was 8.973 × 10 8 and the activation energy ( E a ) was 80.736 kJ mol −1 . Moreover, the empirical Arrhenius equation was determined to be ln K d = − 80.736/ RT + ln(8.973 × 10 8 ). To obtain continuous polymers, acrylonitrile (AN) and methyl methacrylate (MMA) were polymerized using the novel peroxy group-containing silane and FeSO 4 as an initiator system. The number average molecular weights ( M n of PAN = 3×10 4 and M n of PMMA = 1.4 × 10 5 ) and polydispersity indexes (PDI of PAN = 2.76 and PDI of PMMA = 1.65) were determined by GPC. It was suggested that the redox initiation system can generate highly reactive species on the surfaces of inorganic nanoparticles. The nano-TiO 2 -grafted polymers were successfully obtained.
研究领域:
高分子化学
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材料科学
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纳米技术
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表面改性
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引发剂设计
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DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2022
·
IF 9.879
Muhammad Awais,Xiangrong Chen,Zelin Hong,Qilong Wang,Yiwen Shi,Fan-Bo Meng,Chao Dai,Ashish Paramane
Epoxy (EP) resin insulations are widely used in electronic devices and power systems . They are gradually finding their way as winding insulation material for medium frequency transformers (MFT) due to their attractive insulating and adhesive properties along with low cost and easy processing. However, their dielectric insulation properties are compromised at high frequencies and high temperatures due to poor thermal properties. In this context, the surface-treated hexagonal boron nitride (h-BN) micro fillers and core-shell TiO 2 @SiO 2 nanofillers are doped in epoxy (EP) to enhance their thermal and electrical insulation properties under high frequencies and high temperatures. Results reveal that the thermal conductivity of the EP increases continually, whereas the electrical breakdown strength is reduced above the threshold content of micro/nano fillers. Particularly, the micro h-BN addition is beneficial for thermal conductivity enhancement, whereas the core-shell structure of TiO 2 @SiO 2 improves the electrical insulation properties of the EP. The multi-layer core model is used to explain the dynamics of the fillers. The homogeneous dispersion and optimal content of suitable micro-nano fillers can produce efficient EP composites as the electrical insulation for medium frequency transformers.
研究领域:
材料科学
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电气工程
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聚合物纳米复合材料
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电介质与电气绝缘
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DOI
高影响因子
FOOD CHEMISTRY
·
2026
·
IF 10.4
Elam Elnur,Wei Wang,Kiran Thakur,Wen-Ping Ma,Zhi-Jing Ni,Zhao-Jun Wei
A composite film was prepared using sodium alginate as the substrate, supplemented with nano-TiO₂ and antimicrobial agents consisting of pomegranate peel polyphenols and ginger essential oil at different ratios. The film was fabricated via cast-film method as a pomegranate peel polyphenol/ ginger essential oil/sodium alginate/nano-TiO₂ composite. Its properties were characterized, and the film's effects on grape storage quality indicators were evaluated. The results showed the P6 composite film exhibited optimal mechanical properties, with a tensile strength of 6.13 MPa and an elongation at break of 200.88%. Its soil degradation rate reached 10.74% after 15 d. It effectively suppressed quality loss in grapes and significantly reduced rot rates, while better maintaining hardness, ascorbic acid content, soluble solids content, and titratable acidity, thereby extending the grape storage life. This study demonstrates that the composite film extends fruit shelf life, reduces packaging costs for greater economic benefit, and minimizes packaging waste and plastic pollution, offering significant environmental advantages.
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DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 34
·e52603
·
IF 3.057
Kun Chai,Zesheng Xu,Dong Chen,Yingtao Liu,Yiqun Fang,Yongming Song
Microcellular foamed wood-plastic composites (WPCs) have shown good development prospects in environmentally-friendly composites. Herein, the foamed wood flour (WF)/polypropylene (PP) composites were fabricated by mold-opening injection molding using supercritical N 2 as a physical foaming agent. The effects of nano TiO 2 on the microcellular structure and mechanical properties of WF/PP composites were investigated, and the results show that nano TiO 2 accelerates the crystallization rate and reduces the crystallinity of PP, which is beneficial to the formation of foamed homogeneous systems and cell growth in the WF/PP composites. This is mainly due to heteronucleation effect of nano TiO 2 , resulting in the refinement of crystal. Molecular chain movement of PP is limited with the introduction of nano TiO 2 , resulting in increased the melt elasticity of WF/PP composites, thereby reducing cell coalescence and collapse. With the addition of 5 wt% nano TiO 2 , the cell density was increased by 393.8%, the cell size was reduced by 54.4%, and the cell size homogeneity was clearly improved. In addition, impact strength increased by 33.3%. The improved foamability of WF/PP composites using nano TiO 2 shows a great promise for the production and application of WPC foams, especially in automotive, packaging and building areas.
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高影响因子
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