Science of Advanced Materials
·
2022
·Vol. 14
·期 11
·1710-1715
·
IF 1.067
Bian Hang,Zhang Xuejian,Li Yongtao,Li Dong,Li Peng,Liu Huisheng,Wang Wangyang,Xu Ting
In order to replace casein superplasticizer in self-leveling mortars, polycarboxylate grafted cellulose nanocrystals (PC-g-CNCs) have been synthesized and characterized. AFM revealed the spherical and rod-like shape of casein and PC-g-CNCs, indicating that superplasticizers adsorb differently
on the surface of cement particles. In ternary binder-based self-leveling mortars, PC-g-CNCs resulted in smoother paste surfaces without bleeding or segregation and improved fluidity retention than casein. It might be due to CNCs’ high water retention capacity, which changed the viscosity
of mortar while also facilitating delayed cement hydration. Such a PC-g-CNCs emerge as potential substitute for casein superplasticizer applications.
研究领域:
材料科学
·
土木工程
✓ 已验证
DOI
高影响因子
Science of Advanced Materials
·
2016
·Vol. 8
·期 8
·1617-1627
·
IF 1.812
Wen Zhen,Su Jun-Qing,Chen Qing,Chen Li-Di
To improve the physicochemical and pharmacokinetic properties, solid lipid nanoparticles (SLNs) modified with (Polyethylene glycol-2000)-1,2-distearoyl-sn-glycero-3-phosphoethanolamine (PEG2000-DSPE) were prepared using glyceryl monostearate as a lipid carrier and resveratrol as a model
drug. Compared to ordinary SLNs, SLNs doped with low amount of PEG2000-DSPE [m(PEG2000-DSPE):m(lipids) = 1:5, w/w] exhibited improved physicochemical and pharmacokinetic properties, including higher entrapment efficiency (above 80%), smaller particle size (approximately 100 nm), more
distinguished drug release at low pH values (pH < 6.0), and longer drug circulation in vivo. According to the characterizations performed, the DSPE moiety was doped into lipid matrix to form a PEG2000-DSPE/lipid eutectic dopant, inhibiting lipid polymorphism transformation
from α-form to β-form, thereby preventing drug expulsion from the lipid. The dopant contained lattice defects, allowing for the incorporation of more resveratrol. Resveratrol was released in a sustained and pH-sensitive pattern due to nanoparticles destabilization
induced by partial protonation of PEG2000-DSPE. PEG chains distributed on the nanoparticle surface caused steric hindrance and “stealth” properties, thus maintaining dispersion stability and extending circulation time of nanoparticles. These results confirm that PEG2000-DSPE modification
effects are attributable to the matrix and surface structures of nanoparticles, which consist of a core containing DSPEinduced lattice defects and a shell coated with PEG chains.
研究领域:
药剂学
·
生物材料学
✓ 已验证
DOI
高影响因子
Science of Advanced Materials
·
2021
·Vol. 13
·期 7
·1364-1373
·
IF 1.474
Zhang Yumei,Pei Ruina,Luo Tao
ABSTRACT
The development of nanomaterials, especially the development of multi-modality imaging nanoprobe technology has become a reality for tumor imaging diagnosis. In this study, the gadolinium ion chelating agent (2,2′,2′′-(10-(2-(2, 5-dioxopyrrolidin-1-oxyl)-2
oxoethyl)-1, 4, 7, 10-tetraazacyclododecane-1, 4, 7-tri)triacetic acid) (DOTA-NHS) and polyethylene glycol (PEG)-modified targeting ligand PEG-folic acid (FA) were grafted onto the PEG-modified fifth-generation polyamide-amine dendrimer (P5-NH2), which were undertaken as standards
to wrap gold nanoparticles. Then, remaining amino group was acetylated to acquire Gd–Au DENPS-FA nanoparticles. Biocompatibility and cytotoxicity of nanoparticles were analyzed while characterizing them. The cases with unidentified tumors (mass diameter >4.5 cm) of abdominal or pelvic
origin were selected and used for clinical study of computed tomography (CT)/magnetic resonance imaging (MRI) dual-modality abdominal tumors. In the test, average particle size of Gd-Au DENPs-FA nanoparticles was 4.2 nm, and they had good water solubility and stability in aqueous solution.
When concentration of Au+ nanoparticles increased, the cell morphology remained normal, only a small number of round cells appeared, and the cell activity remained above 80%. GD-Au DENPs-FA nanoparticles had a good targeting specificity for KB cells with high folate receptor expression.
During 6–24 hours of injection, the signal at the tumor site of the patient was enhanced markedly, namely the targeted gold nanoparticles were bound to the tumor tissue and the metabolic rate was slow. Based on this material, CT/MRI imaging could be performed in the patient’s body
and further used for the early diagnosis of abdominal tumors.
研究领域:
医学影像学
·
纳米生物学
·
肿瘤学
✓ 已验证
DOI
高影响因子
Science of Advanced Materials
·
2016
·Vol. 8
·期 8
·1673-1677
·
IF 1.812
Shi Yuedan,Liu Chunguang,Xu Linran,Nan Wang,Guan Xiaohui
We studied the physical properties of aqueous solution of four acid functional room temperation ionic liquids based on imidazolium: 1-(3-sulfonic group) propyl-3-methylimidazole hydrosulfate ([PSIM][HSO4]), 1-(3sulfonic group) propyl-3-methylimidazole dihydrogen phosphate
([PSIM][H2PO4]), bis-(3-methyl-1-imidazole) butylidene double hydrosulfate ([DBIM] [HSO4]2, bis-(3-methyl-1-imidazole) butylidene double dihydricphosphate ([DBIM][H2PO4]2). The measurements of acidity, refractive
index, viscosity and electrical conductance were made. The molar conductivity was calculated. The physical properties of aqueous solutions changes with the concentration of aqueous solution, the cation and the anion.
研究领域:
化学
·
材料科学
✓ 已验证
DOI
高影响因子
Science of Advanced Materials
·
2019
·Vol. 11
·期 1
·50-55
·
IF 1.158
Li Junjing,Wang Huan,Cui Yuqi,Luan Cong,Wang Liang,Zhang Zhaohui,Zhao Bin,Ma Chang,Zhang Hongwei,Cheng Xiuwen
Understanding the kinetics during electrochemical hydrodechlorination was of great importance to the design of treatment process. In this study, the six isomers of dichlorophenol were subjected to electrochemical hydrodechlorination using homemade palladium/polypyrrole/foam nickel electrode.
Under the conditions of dechlorination current is 5 mA, temperature is 25 °C, initial concentration of pollutants is 0.5 mmol L–1, electrochemical dechlorination time is 120 min, the dechlorination processes of 2,3-dichlorophenol (2,3-DCP), 2,4-dichlorophenol (2,4-DCP),
2,5-dichlorophenol (2,5-DCP), 2,6-dichlorophenol (2,6-DCP), 3,4-dichlorophenol (3,4-DCP) and 3,5-dichlorophenol (3,5-DCP) were compared. The degradation of dichlorophenol reaction followed pseudo-first-order kinetics. During the electrolysis process, the products of six DCP (dichlorophenol)
isomers dechlorination are mainly phenol, a small amount of monochlorophenol produced at the same time. The classification kinetics of six kinds of DCP (dichlorophenol) was studied according to the dechlorination path. Then the reaction rate constants of different reaction stages were obtained.
Besides, we speculated that the degradation rates of six DCP isomers were affected by pK
a
and molecular structure.
研究领域:
环境科学
·
电化学工程
✓ 已验证
DOI
高影响因子
Science of Advanced Materials
·
2020
·Vol. 12
·期 11
·1673-1679
·
IF 1.117
Liu Dong-Bin,Li Ye,Zhou Yu-Zhi,Xu Li-Dong,Liu Dong-Xue,Li Bo-Lin,Zhao Shao-Lin
In this study, (3-mercaptopropyl) trimethoxysilane as a modifier, the mercapto group (-SH) was grafted onto the surface of attapulgite (ATP) by ultrasonic stirring. Before and after modification, the surface feature and structure of attapulgite and mercapto attapulgite (ATP-SH) were
characterized by using scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD), the results indicated that the physicochemical changes of the materials and the mercapto groups were jointed on the surface of attapulgite. In this work, mercapto
attapulgite was used as an adsorbent for manganese adsorption, adsorption experiments were implemented to investigate the effects of different influencing conditions, the results shown that the solution pH showed a slightly impact in the sorption process, because of the presence of manganese
in the solution is Mn2+ and MnOH+. The Fourier transform infrared characterization results illustrated that the mercapto attapulgite had a number of active functional groups on the surface, which can combine with manganese. Moreover, the sorption process was more suitable
for the pseudo-second-order model (R
2 = 0.9986), which was illustrated that the chemical sorption plays a major role, and also existed physisorption. The sorption experiments date were more suitable for fitted to Langmuir isotherm model (R
2 = 0.9961), illustrated
that the adsorption process was dominated by monolayer adsorption. These results of the removal ratio, sorption capacity and adsorption mechanism of manganese suggest that the mercapto attapulgite could be applied as an adsorbent for extracting manganese from sewage.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Science of Advanced Materials
·
2015
·Vol. 7
·期 2
·295-300
·
IF 2.598
Liang Peng,Zhang Lin,Zhao Xiaoliang,Li Jianjiang,Liu Long,Cai Rongsheng,Yang Dongjiang,Umar Ahmad
It is an efficient strategy to extend the light response range of TiO2-based photocatalysts to visible light region by constructing heterojunctions with the low bandgap semiconductors. The bandgap edge match between the low bandgap semiconductors and the TiO2 substrate
is believed to a key to sensitize the TiO2-based photocatalysts. In this study, TiO2 (anatase) nanofibers were modified by ZnFe2O4 nanoparticles from ZnO colloid. The ZnFe2O4 nanoparticles with a relatively narrow band gap of
1.90 eV and the conduction band edge at –1.54 eV (vs NHE) which is more negative than that of TiO2. So as expected, the ZnFe2O4 particles extended the photoresponse of TiO2 (anatase) nanofibers into the visible light region and enhanced the
photoresponse of UV light. The photogenerated electron–hole separation in ZnFe2O4/TiO2 (anatase) composite nanofibers is responsible for the rapidly increased photocurrent under the visible light and UV light irradiation.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Science of Advanced Materials
·
2015
·Vol. 7
·期 7
·1331-1340
·
IF 2.598
Sheng Jiaolong,Luo Man,Hu Juncheng,Lv Kangle,Tang Heqing,Li Jinlin
Novel SrNb6O16/GO nanocomposites have been successfully synthesized via a facile, template-free and one-step hydrothermal synthesis process. The prepared materials were characterized by X-ray diffraction (XRD), the Brunauer–Emmett–Teller (BET) specific
surface areas, X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), Fourier transform infrared (FT-IR) spectroscopy, UV-visible diffuse reflectance spectroscopy (DRS) and Photoluminescence spectra (PL). The prepared SrNb6O16/GO nanocomposites
showed superior photocatalytic activity than pure SrNb6O16 nanoparticles and Degussa P25 in the degradation of RhB under simulated sunlight irradiation. The enhanced photocatalytic activity of SrNb6O16/GO nanocomposites could be mainly ascribed to
the significantly increased adsorption capacity and the prolonged lifetime of electron–hole pairs. This work not only provided a simple way to synthesize graphene based composites but also a pathway to obtain efficient functional materials for environmental purification and other applications.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Science of Advanced Materials
·
2020
·Vol. 12
·期 12
·1896-1906
·
IF 1.117
Che Lishuang,Chen Jinhai,Zhang Yun,Li Yuangen,Li Yueting
In this study, cellulose is used as the raw material. Considering that polyether sulfone has good biocompatibility and can reduce protein adsorption, the ionic liquid is used to dissolve, and dry-wet phase conversion method is used to blend cellulose and polyether sulfone to produce
the composite polymer hemodialysis membrane material. Then, an anticoagulant/hydrophilic heparinoid is synthesized and applied to the dialyzer made of composite polymer dialysis membrane material. During the preparation process, the spinning solution (SS) temperature, air gap (AG) length,
and coagulation bath (CB) temperature are changed, and their effects on the structure/performance of the dialysis membrane are analyzed. The test shows that the spinning liquid temperature shouldn’t exceed 100 °C, the AG length shouldn’t exceed 10.0 cm, and the CB temperature
at 30.6 °C could maximize the performance of the dialysis membrane. In the experiment, the new heparin is divided into three structural systems (M-1, M-3, M-1 / M-2), which are applied to the dialysis membrane to obtain three kinds of dialysis membrane (CP-A, CP-B, CP-C). The hydrophilic
groups on the surface of the composite polymer dialysis membrane are modified to form a hydration layer with water to avoid direct contact between proteins and the polymer dialysis membrane, and APTT test value reaches 600 s, which proves that the dialyzer designed with dialysis membrane material
in this study has a good anticoagulation effect.
研究领域:
生物材料学
·
医学工程
·
生物医学
✓ 已验证
DOI
高影响因子
Science of Advanced Materials
·
2019
·Vol. 11
·期 2
·183-188
·
IF 1.158
Guo Ming,Sun Mingming,Chen Ning,Li Peishen,Wang Qiang,Hu Changwen
Hierarchical CdS nanosheet assembled flowers modified with CuS were synthesized by a simple ion exchange method. The prepared CuS/CdS composites exhibited high visible light photocatalytic hydrogen production activity, and the optimal photocatalytic hydrogen activity of CuS/CdS with
5 wt% loading was 2978 μmol g–
1 h–
1, which exceeded the pure CdS by more than 6 times. The hierarchical organization of nanosheet and uniform distribution as well as close contact between the components in the multi-component
photocatalyst improved the light absorption and charge carrier transfer ability, ultimately enhanced the photocatalytic hydrogen production activity. This work shows a great potential of hierarchical CuS/CdS nanosheet assembled flowers for photocatalytic hydrogen production, and also demonstrates
that the ion exchange strategy can be extended to the preparation of other CuS and sulfides with hierarchical nanostructures.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
Science of Advanced Materials
·
2013
·Vol. 5
·期 9
·1290-1296
·
IF 2.509
Qian Huofei,Xiao Junwu,Mao Zhiyong,Zhu Yingchun
Uniform lens-like vaterite mesocrystals (LVM) were formed in a hydrosoluble polymer network by combining branched polyethyleneimine (BPEI) with maleic acid (MAc) through hydrogen bonds and electrostatic interaction to stimulate the mild biomineralization occurred in nature. Various
characterization methods were employed to investigate the formation mechanism of LVM. The results of scanning electron microscope (SEM) and transmission electron microscope (TEM) depicted the evolution process of LVM: the initial nucleation of amorphous calcium carbonate (ACC) in the supersaturation
solution, the subsequent aggregation process, and the final crystallization from ACC nuclei to vaterite nanocrystals and their oriented attachment into uniformly mesocrystals. Furthermore, the decreasing organic constitutions were involved in the transformation from amorphous precursors into
final mesocrystals, confirming the expulsion of the organic additives during the transformation process and in accompany with increasing crystallinity degrees with prolonged reaction time. This biomimetic mineralization strategy of LVM in mild condition is similar to that of the nacre formation
in nature, and can illuminate biomaterials research such as calcium phosphate and bio-glass production.
研究领域:
材料科学
·
生物矿化
·
仿生学
✓ 已验证
DOI
高影响因子
Science of Advanced Materials
·
2015
·Vol. 7
·期 3
·526-531
·
IF 2.598
Chen Xiang,Gao Qian,Xiang Di,Lin Huiming,Han Xiao,Li Xin,Du Shantao,Qu Fengyu
Porous ZnO nanofibers were prepared through the electrospun method using zinc acetate as zinc source and polyvinylpyrrolidone as thickener agent. Under adjusting the amount of zinc acetate, the synthesized porous ZnO nanofibers show various structures (fiber, tube, and fiber-in-tube).
And the formation mechanism was discussed in detail. These porous ZnO samples show the uniform structure about 200 to 300 nm in diameter and several microns in length. All the fibers are composed of many ZnO nanoparticles (20–30 nm) that assemble to form the porous structure and induce
the large surface area and high pore volume of the sample. These porous ZnO nanofibers were configured as high performance sensors for acetone sensing, showing high sensitivity (S = 243.3 at 500 ppm), low detection limit (10 ppm), fast response/ recovery (7/17 s), and very good selectivity.
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）