INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Xue Ma,Xuefei Chen,Xiaohua Wang,Xiaohua Yang,Zengwen Yao,Houyong Yu,Yunyun Zhang
Polyamide 66 (PA66) has garnered significant attention due to its exceptional properties; unfortunately, its flammability is challenging. Adding flame retardants (FRs) is a primary approach to enhance PA66 flame retardancy. This study developed a highly flame-retardant PA66 composite film by adding corn-like functional nanohybrids (CNC/Al 2 O 3 ). Interestingly, CNC/Al 2 O 3 nanohybrids not only formed hydrogen bond interactions with PA66 but also improved crystallization properties as heterogeneous nucleating agents, resulting in the excellent mechanical properties of PA66 composite film. Remarkably, the incorporation of 3 wt% CNC/Al 2 O 3 nanohybrids into PA66 matrix contributed to increasing the LOI to 28.5 %. The pHRR, THR, and TSR were reduced obviously by 55.7 %, 15.3 %, and 65.2 %, respectively. The excellent flame retardancy of PA66 composite film was attributed to the forming of a compact carbon layer catalyzed by the CNC/Al 2 O 3 nanohybrids. Besides, the homogeneous distribution of CNC/Al 2 O 3 nanohybrids endowed the composite film with excellent heat insulation, and the heat insulation rate was up to 31.9 %. Thus, such PA66 composite films with excellent flame retardancy, heat insulation, and mechanical properties could meet the broader application requirements.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2018
·Vol. 8
·期 9
·706
·
IF 3.504
Yuefang Niu,Guo Ling,Li Wang,Shanyue Guan,Zheng Xie,Eran A. Barnoy,Shuyun Zhou,Dror Fixler
Emphasis using phototheranostics has been placed on the construction of multifunctional nanoplatforms for simultaneous tumor diagnosis and therapy. Herein, we put forth a novel nanosized luminescent material using the incorporation of red emissive carbon dots on gold nanorods through polyethylene glycol as a covalent linkage for dual-modal imaging and photothermal therapy. The novel nanohybrids, not only retain the optical properties of the gold nanorod and carbon dots, but also possess superior imaging performance in both confocal laser scanning microscopy and fluorescence lifetime imaging microscopy. The nanohybrids also exhibit excellent photothermal performance as phototheranostic nanohybrid probes for in vitro assays. This study promises a new multifunctional nanoplatform for cancer diagnostics and therapeutics.Keywords:gold nanorod;carbon dots;nanohybrids;bioimaging;photothermal therapy
研究领域:
纳米技术
·
癌症研究
·
诊疗学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Composites and Hybrid Materials
·
2022
·Vol. 5
·期 2
·907-919
·
IF 11.806
Zhou Kecong,Wang Menglong,Zhou Yangqi,Sun Mengjun,Xie Yufeng,Yu Deng-Guang
Blended electrospinning is frequently utilized to prepare drug-loaded nanocomposites to take advantages of the nanofibers’ small diameters and large surface area. However, the homogeneous distribution of drug makes most of them embedded in the polymeric matrix, which correspondingly limits the functional applications. In the present study, a modified coaxial electrospinning was implemented, in which a pure drug (ciprofloxacin, CIP) solution was explored as a sheath working fluid to coat drug on the surface of polymer (cellulose acetate, CA) nanofibers to form a polymer@drug nanohybrid (NH). For comparison, an electrospun CA-CIP nanocomposite was prepared using a one-fluid blending process. Both NCs and NHs had linear morphologies without beads or spindles on them. CIP were embedded on the surface of CA nanofibers in the NH as crystalline nanoparticles, whereas CIP co-existed with CA in the NCs in an amorphous state. In vitro dissolution tests verified that NHs release the surface CIP in a pulsatile manner and NCs release the loaded CIP in a continuously. Antibacterial tests demonstrated that the NHs with a drug loading of 3.9% (w/w) showed a better zone of inhibition zone for Staphylococcus aureus and Escherichia coli than the NCs with a drug loading of 16.7% (w/w). Thus, the present study pioneered the way for the development of novel nanohybrids with improved functional properties. Graphical abstract
研究领域:
材料科学
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生物医学工程
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药剂学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Fang Wang,Xianhong Zhang,Yuhong Ma,Dong Chen,Wantai Yang
A novel flexible dielectric composite with halloysite nanotube-poly(3,4-ethylenedioxythiophene) (HNTs-PEDOT) hybrid as conductive filler and poly(vinylidene fluoride) (PVDF) as polymer matrix were prepared via a blending and hot-pressing technique. HNTs-PEDOT hybrid, with PEDOT coated onto both the negatively charged inner and out surfaces of the HNTs tubes, were fabricated by chemical oxidative polymerization of EDOT with unmodified HNTs as templates. The conductivity of HNTs-PEDOT hybrid with 50 wt% HNTs is up to 12.89 S/cm, which is 100 times greater than that of pure PEDOT (about 0.12 S/cm) synthesized under the similar condition. With PEODT as outside organic layer, HNTs-PEDOT could be easily dispersed in PVDF matrix uniformly. In addition, with the introduction of HNTs-PEDOT into PVDF matrix, it makes a phase transformation of PVDF from α to electroactive β phase. HNTs-PEDOT/PVDF shows good dielectric performance. At close to the percolation threshold value ( f HNTs-PEDOT = 0.11), the dielectric constant of HNTs-PEDOT/PVDF is up to 641 at 1000 Hz, which is attractive to prepare flexible materials.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
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2019
·Vol. 94
·期 8
·2512-2521
·
IF 2.659
Qi Jiang,Runliang Zhu,Yanping Zhu,Qingze Chen
Background Developing effective removal processes for antibiotics has attracted increasing interest recently. In this work, a novel strategy involving the combination of photocatalysis with Fenton reaction using ferrihydrite/TiO 2 (Fh/TiO 2 ) nanohybrids was developed to efficiently degrade the antibiotic cefotaxime. Fh/TiO 2 nanohybrids were synthesized by simply growing Fh on the surface of commercially available TiO 2 . We expected that Fh of Fh/TiO 2 could capture photo-generated electrons from TiO 2 , inhibiting the recombination of electron–hole pairs; also, by virtue of Fe(III)/Fe(II) cycle on Fh/TiO 2 , photo-generated electrons could be continually transferred to H 2 O 2 to produce ·OH. Accordingly, high degradation efficiency of cefotaxime could be achieved. Results With UV light and H 2 O 2 , Fh/TiO 2 with a Fe/Ti molar radio of 7% showed high catalytic activity indeed, and its degradation rate for cefotaxime was nearly three times higher than that of TiO 2 . The decomposition of H 2 O 2 and production of ·OH in the UV+7%Fh/TiO 2 +H 2 O 2 system were also increased markedly. The large amount of Fe(II) on 7%Fh/TiO 2 determined in this system supported our hypothesis that Fh of 7%Fh/TiO 2 could capture photo-generated electrons from TiO 2 . Although dissolved iron was observed, the contribution of Fenton reaction by dissolved iron was rather limited. After four consecutive cycles, 7%Fh/TiO 2 still retained good stability. Conclusions The UV+7%Fh/TiO 2 +H 2 O 2 system provides a potential alternative in degradation of cefotaxime for further practical application, and it has the following advantages: high catalytic activity, simple preparation method, good stability and low cost, as well as continued catalytic activity after total consumption of H 2 O 2 . © 2019 Society of Chemical Industry
研究领域:
环境科学
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化学工程
✓ 已验证
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Shujun Zhao,Xuebin Lian,Dehuan Kong,Shuangfei Xiang,Feiya Fu,Xiangdong Liu
There still exist challenges to regulate the crosslinking network of soybean flour (SF) precisely with both strong and tough mechanical properties to match adhesion requirements of wood adhesives applications. Herein, a novel nanohybrid crosslinker with dynamic bonding effect was synthesized and then employed to improve SF adhesives. Dimethylglyoxime as chain extender was incorporated into polyurethane cooperating with CuO to form dynamic coordination bonds, after which epoxy and siloxane dual-functionalized polyurethane was co-deposited onto cellulose nanocrystal (CNC) surface to construct reactive “rod-bead” nanohybrid named CuOGU@CNC. It is found that epoxy groups induce CuOGU@CNC to form covalent crosslinking interactions with SF matrix constructing a stable adhesive system. Meanwhile, the dynamic coordination bonds of dimethylglyoxime and CuO serve as sacrificial units to contribute for energy dissipation, during which the unique “rod-bead” structure increases contact efficiency between DMG and CuO to optimize bonding exchange rate to high-effectively redistribute stress during loading. Given on the effect, the adhesives modified by CuOGU@CNC present improved dry and wet adhesion strength , and adhesion toughness compared to pristine SF sample. This work can provide a facile strategy to prepare high-performance wood adhesives aiming to meet higher applicational standard.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
·
IF 8.2
Jiabao Qiu,Shuai Yuan,Honggang Xiao,Jinfu Liu,Tao Shen,Zhuotao Tan,Wei Zhuang,Hanjie Ying,Ming Li,Chenjie Zhu
Lignin-based hybrid fillers are of increasing importance with regards to the valorization of low-value biomass and the requirement of sustainability in rubber industry, however, a facile lignin modification approach tuning the supramolecular interactions to favor the assembly of the hybrids is in demand. This study aimed to design a lignin/SiO 2 nano-hybrid via an in-situ assembly of diethylamine grafted lignin (DL) and SiO 2 , and investigate its reinforcing effect on natural rubber (NR). DL was prepared through Mannich modification of lignin, and the grafted diethylamine can be clearly identified by FTIR, NMR and elemental analysis. The resultant hybrid (DLSi) displays as homogeneous nanospheres with well integrated DL and SiO 2 components as shown in the TEM images, and the hybrid (DLSi1) prepared with weight ratio of DL/SiO 2 = 1/2 shows a minimum particle size of 101.8 nm and significantly reduced polarity. Compared to the reference composite filled only with carbon black (CB), NR composites filled with DLSi/CB of 10/40 phr shows comparable mechanical properties and reduced rolling resistance, which is due to the low particle size, homogenous dispersion and strong rubber-filler interfacial affinity. Such remarkable performance suggests that the DLSi hybrid can be a promising versatile biobased filler for the application in gasoline-saving “green” tires.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2022
·
IF 9.879
Can Jiang,Huahao Shen,Xiaoyun Bi,Zuhao Wang,Manzhao Yao,Yanguang Wu,Liqun Zhang,Peng Yu
In rubber industry, lignin has been investigated as a potential alternative of fossil-derived carbon black (CB) for several decades. However, due to poor dispersity, big particle size and incompatibility with rubber, lignin cannot achieve the same reinforcing effect as CB by direct dry mixing. Here, a new and green dual-phase carbon-silica nanohybrid (LDPCS) was successfully prepared from black liquor lignin (BLL) and sodium silicate through a simple co-gelation/self-assembly and carbonization process. The preparation mechanism and process as well as the morphology and properties of LDPCS were investigated and discussed in detail. The results indicated that the hydroxymethylation and silane modification of BLL could improve its affinity with SiO 2 sols, thus facilitating the co-gelation of BLL and SiO 2 sols to inhibit the growth of SiO 2 particles. During subsequent acid precipitation, silane modified hydroxymethylated BLL (SiHM-BLL) was self-assembled around SiO 2 particles to form nanosized SiHM-BLL-SiO 2 hybrids. After carbonization, SiHM-BLL-SiO 2 nanohybrids were converted into LDPCS with small primary particle size of 60–90 nm, high specific surface area of 82.19 m 2 /g, relatively loose secondary aggregation structure and graphitic microcrystals in the carbon framework. With incorporating LDPCS into styrene-butadiene rubber (SBR) by direct dry mixing, LDPCS showed a superior reinforcing capability for SBR as compared with CB, which was ascribed to the nanoscale dispersion of LDPCS, robust C/SiO 2 interfaces and high affinity with SBR matrix. This work provided a new insight into the fabrication of novel hybrid nanofiller from lignin and broadened the potential applications of lignin in rubber compounds and beyond.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Materials Advances
·
2023
·Vol. 5
·期 3
·1234-1239
·
IF 5
Yi Lv,Jing Yang,Haibo Li,Wei Liu,Gangfeng Ouyang
In this paper, the structures and optical properties of copper(I) halide mononuclear hybrids have been studied. Three pairs of compounds with different organic ligands have been synthesized by a precursor approach, exhibiting significantly enhanced stability compared to typical copper halide monomers by the formation of stronger Cu–P bonds, proving that copper halide monomer-type hybrid compounds have the potential to be developed into high-performance light-emitting materials.
研究领域:
材料化学
·
光学材料
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Siyu Fang,Xinyi Zhou,Luoyan Lin,Lu Fang,Hongying Liu,Bo Liang
Diabetes mellitus is a significant global chronic endocrine and metabolic disorder that affects millions of individuals worldwide. Accurate measurement of glucose levels in patients is of paramount importance. This study presents the development of a flexible and conductive paper-based (FCPAD) electrode composed of PEDOT:PSS and platinum nanohybrids for the electrochemical determination of glucose. The conductivity of the FCPAD electrode was assessed under various bending angles and durations. The findings revealed that the conductivity of the FCPAD electrode remained largely stable after exposure to bending at 180 degrees and after 1200 bending cycles. Additionally, the electrode demonstrated long-term stability, maintaining its conductivity for over 30 days. Platinum nanoparticles (PtNPs) and glucose oxidase (GOx) were immobilized on the FCPAD electrode to fabricate a GOx/PtNPs/FCPAD glucose sensor. The electrochemical behavior and detection performance of the GOx/PtNPs/FCPAD glucose sensor were subsequently evaluated. This glucose electrode exhibited a high sensitivity of 21.17 µA mM −1 (equivalent to 1058 μA mM −1 cm −2 ), along with a broad detection range of 0.02 to 5 mM, and a limit of detection of 2.7 µM. Moreover, the sensor exhibited exceptional repeatability, robustness against interference, and consistent stability throughout subsequent evaluations. It was effectively utilized for the quantitative analysis of glucose in both artificial sweat and artificial urine. The GOx/PtNPs/FCPAD electrode is expected to be employed in wearable flexible electrochemical sensors for the real-time monitoring of glucose concentrations in sweat.
研究领域:
生物医学工程
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Yi Li,Yuhang He,Yujuan Pu,Tao Duan,Youkui Zhang
The use of electrochemical tactics to reduce nitrate to the valorized product ammonia has become the hot topic. Recently, the synergistic effect of metal/metal oxide is provided to significantly enhance the electrocatalytic performance of nitrate reduction as opposed to monometallic catalyst. In this work, a reticulated fibre structure with Cu/CoO nanoparticles (Cu x Co y O-NC) was prepared for electrocatalytic nitrate reduction (NO 3 - RR) to ammonia. The optimized catalyst (Cu 1 Co 1 O-NC) displayed brilliant performance for NO 3 - RR with high Faraday efficiency (FE) of 97.9 %, the excellent NH 3 yield rate of 0.45 mmol h −1 cm −2 , prominent NH 3 selectivity of 98.4 % and efficient NO 3 – conversion of 99.2 % at −0.79 V vs reversible hydrogen electrode (RHE). Besides, Cu 1 Co 1 O-NC also exhibits the potential for uranium recovery from simulated wastewater containing nitrate and uranyl ions with a total yield of 508 mg ammonium diuranate after i-t measurement for 6 times. This work not only provides an efficient catalyst for reduction nitrate but also proposes the sustainable method for uranium containing sewage realizing nitrogen cycle.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Songlong Jiao,Lei Liu
Photocatalytic degradation is a potential method to solve pollution caused by waste lubricating oils. In this work, vertically aligned MoS2 layers are grown on Ti3C2 via hydrothermal method and the influence of the friction time on its photocatalytic performance was studied. The results show that friction benefits the improvement of the efficiency of catalytic degradation because of the change of photocatalysts’ morphology caused by the shear force and pressure from rubbing pair, which generates more active sites. MoS2@Ti3C2 nanohybrid with friction time of 60 min has the best photocatalytic performance in terms of waste oil (liquid paraffin) and methyl orange removal of 80.5 and 98%, respectively. The Schottky junction between Ti3C2 and MoS2 and the heterojunction between MoS2 and TiO2 can prolong the recombination time of electron–hole pairs and widen the absorption range of the visible light, which play a key role in the excellent photocatalytic activity of the MoS2@Ti3C2 nanohybrid.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）