JOURNAL OF MATERIALS SCIENCE
·
2016
·Vol. 52
·期 3
·1369-1380
·
IF 2.302
Liu Bin,Xia Yang,Zhou Yifeng,Nie Wangyan,Chen Pengpeng
To improve the dispersion stability of rod-like attapulgite (ATT) in polymers, a small amount of graphene oxide (GO) nanosheets were employed as a supporter to fix ATT before introducing into polymer. The ATT nanorods were found attached tightly and dispersed uniformly on the GO nanosheets from TEM images of GO-ATT hybrids. The dispersion stability of ATT in water was also improved after being attached on GO nanosheets due to the abundant hydrophilic groups of GO, which was paramount for introducing them into polymers through water blending method. Poly(vinyl alcohol) (PVA) was then chosen to be reinforced by these GO-supported ATT via water blending method. Compared to the heavy aggregation of neat ATT in PVA, a homogeneous distribution of ATT nanorods in the matrix was achieved by introducing them in the form of GO-ATT, indicating a favorable assisted dispersion effect of GO nanosheets for ATT. Furthermore, PVA/GO-ATT nanocomposites containing only 2 wt% GO-ATT exhibited a significantly increase of 41.4 and 83.6 % in tensile strength and storage modulus, respectively.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2014
·
IF 2.736
Xiaomo Li,Hui Zhong,Xiaorong Li,Feifei Jia,Zhipeng Cheng,Lili Zhang,Jingzhou Yin,Litao An,Liping Guo
Environmentally sensitive hydrogels as one of the most potential drug delivery systems have gained considerable interest in recent years. In the present study, we synthesized a newly temperature-responsive composite hydrogel based on attapulgite (ATP) and poly (N-isopropylacrylamide) (PNIPAM) as the localized drug carriers for drug delivery. The as-prepared ATP/PNIPAM hydrogel has large aperture which significantly improved the quantity of adsorption of drugs, exhibiting the excellent properties of drug release. The scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and X-ray diffraction (XRD) were used to characterize the ATP/PNIPAM. The swelling/deswelling behaviors and the release of ciprofloxacin lactate were studied. When the temperature was below the low critical solution temperature (LCST), the swelling property of hydrogels was excellent and the swelling rate was large. And, the drug release rate increased with the increase of the content of attapulgite in the composite hydrogel when it was put in the buffer solution (pH 7.38) at 37.0 °C. Therefore, the composite hydrogels might be very useful for its application in biomedical fields.
研究领域:
材料科学
·
药物递送
·
高分子化学
·
生物医学工程
·
智能水凝胶
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Jie Li,Yue Yin,Lingjing Meng,Hui Qiao,Huan Zhang,Yunfei Cai,Yonglong Zhang,Feiyan Yang,Jinfang Wu,Mei Wu,Jian Liu,Wenbo Wang
Porous attapulgite (ATP) was employed as green container for storing corrosion inhibitors that can enhance both the corrosion inhibition and self-healing properties of organic coatings. The key to realizing ATP containers in smart corrosion resistance is clarifying the influence of ATP's surface charge on inhibitor loading capacity and the degradation behavior of ATP in active corrosion protection, but this aspect is often overlooked. Herein, an effective enhance the physical barrier and active corrosion resistance of the polyvinyl butyne vinyl acetate (PVB) coating by developing ATP containers was proposed. The results indicated that with the incorporation of 0.5 wt% Acid-etched ATP or BTA@ATP, the |Z| 0.01Hz of composite coatings on zinc substrate enhance six times (4.8 × 10 4 Ω cm 2 ) and sixteen times (1.2 × 10 5 Ω cm 2 ) than the pure PVB coating (7.8 × 10 3 Ω cm 2 ), respectively. The corrosion protection mechanism contributes to the filling of cracks with ATP nanocontainers to provide barrier protection, the release of corrosion inhibitors to passivate the damaged areas, as well as the degradation of the ATP itself to form a silicate layer to inhibit the progression of corrosion. Hence, the strategy of ATP nanocontainer preparation will facilitate the high-value utilization of attapulgite and potentially provide guidance for researchers in designing micro/nano-containers.
研究领域:
材料科学
·
防腐蚀工程
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产品关联
DOI
高影响因子
Materials
·
2018
·Vol. 11
·期 1
·86
·
IF 2.467
Guangyan Tian,Wenbo Wang,Yongfeng Zhu,Li Zong,Yuru Kang,Aiqin Wang
Activated clay minerals have been widely used in the edible oil refining industry for decolorization of crude oil by adsorption, and so far many methods have been used to improve their decolorization efficiency. Herein, we successfully prepared a series of carbon/attapulgite (C/APT) composite adsorbents by a one-step in-situ carbonization process with natural starch (St) as the carbon source. It has been revealed that the adsorbent had better decolorization efficiency for crude palm oil than acid-activated APT. However, more than a million tons of decolorized waste is produced every year in the oil-refining industry, which was often treated as solid waste and has not yet been reutilized effectively. In order to explore a viable method to recycle and reuse the decolorant, the waste decolorant was further prepared into new C/APT adsorbents for the removal of dyes from wastewater, and then the dyes adsorbed on the adsorbent were used as the carbon sources to produce new C/APT adsorbents by a cyclic carbonization process. The results showed that the adsorbents prepared from the decolorized waste could remove more than 99.5% of the methylene blue (MB), methyl violet (MV), and malachite green (MG) dyes from the simulated wastewater with the dye concentration of 200 mg/L, and the C/APT–Re adsorbent consecutively regenerated five times using the adsorbed dyes as a carbon source still exhibit good adsorption efficiency for dyes. As a whole, this process opens a new avenue to develop efficient decolorants of palm oil and achieves recyclable utilization of decolored waste.
研究领域:
材料科学
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环境工程
·
化学工程
✓ 已验证
DOI
高影响因子
IET Nanobiotechnology
·
2016
·Vol. 11
·期 2
·200-204
·
IF 1.541
Dan Zhu,Wenfeng Zhu,Weiwei Wang,Xiaoheng Liu
Aiming to monitor hydrogen peroxide and oxidizing ions in aqueous circumstance, functionalized attapulgite [i.e. gold-modified attapulgite nanocomposites (Au/ATP NCs)] as peroxidase mimics were prepared by loading β-cysteamine-capped gold nanoparticles onto attapulgite with the use of electrostatic interactions. As-prepared Au/ATP NCs were used for the detection of H 2 O 2 . The linear range and detection limit for H 2 O 2 were determined by quantitative experiments emerging excellent stability and recyclability. The peroxidase-like activity of Au/ATP NCs could be expanded for the detection of some oxidative ions (Fe 3+ and Ag + ) was also been discovered. Based on the absorption spectrum and steady-state kinetics, the mechanism for peroxidase mimic reaction is investigated. This work represents the first example of multitarget detection for molecule and cations (H 2 O 2 , Fe 3+ and Ag + ) using Au/ATP NCs as peroxidase enzyme mimics and holds a promise for future biomedical and analytical applications.
研究领域:
生物化学
·
分析化学
✓ 已验证
DOI
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2017
·Vol. 77
·期 1
·167-176
·
IF 1.197
Zheng Weisheng,Wang Hailing,Zhu Zhaolian,Wei Peng
Polydopamine-modified granule organo-attapulgite adsorbent (PDA-GOAT) was facilely prepared via a dip-coating approach. The samples were characterized by scanning electron microscopy, X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy. Surface area and pore size were calculated from the Brunauer–Emmett–Teller method by N 2 adsorption–desorption isotherm. The adsorption behaviour of methylene blue (MB) onto PDA-GOAT was systematically investigated. The experimental data revealed that the adsorption process fitted well with the pseudo-second-order kinetics equation and the adsorption isotherm fitted better with the Langmuir model. Thermodynamic analyses illustrated that MB adsorption onto PDA-GOAT was a physisorption endothermic process. Importantly, PDA-GOAT can be regenerated by NaBH 4 aqueous solution. The obtained results prove that PDA-GOAT can be a superior reusable adsorbent for the removal of MB from effluent.
✓ 已验证
DOI
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2019
·
IF 3.074
Wei Qin,Guanyin Qian,Haibin Tao,Junwei Wang,Jiayin Sun,Xiaofeng Cui,Yuanguang Zhang,Xianlong Zhang
This research focused on developing a series of (G1.0, G2.0, G3.0 and G4.0) PAMAM dendrimers modified attapulgite (ATP) sorbents (G1.0-G4.0 PAMAM-ATP) to remove Hg(II) from aqueous solution. The effects of several parameters including solution pH, contacting time, temperature and initial Hg(II) ion concentration were studied. Batch sorption results showed that the adsorption process was rapid and over 90% of Hg(II) was removed within 80 min at optimal pH 5.0. The adsorption capacity of PAMAM-ATP adsorbents followed the order of G2.0 > G1.0 > G3.0 > G4.0 and the maximum adsorption capacities significantly increased from 5 mg/g (raw ATP), 90 mg/g (amine modified ATP, M-ATP), 192.5 mg/g (polyacrylamine modified ATP, PAM-ATP) by previous similar studies to 200.8 mg/g (G2.0-PAMAM-ATP). Kinetics of adsorption was suitable for pseudo-second-order and controlled by chemical adsorption over a whole sorption range. The adsorption capacities increased as temperature rise from 283 to 303 K and the thermodynamics properties implied that the adsorption processes was spontaneous and endothermic. Thus, the adsorption capacities decreased when the temperature was above 303 K. The isotherm adsorption was described by Langmuir model well with monolayer behavior. A specific coordination between Hg(II) and the N, O atoms on the functional groups of PAMAM-ATP surface was determined by XPS analysis . Furthermore, the maximum adsorption capacity of the regenerated G2.0-PAMAM-ATP sorbents could still be higher than 90% after five cycles by acid treatment. The favorable adsorption capacity compared with other adsorbents exhibited that G2.0-PAMAM-ATP was an excellent renewable sorbent for Hg(II) removal.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2012
·
IF 3.832
Yunjiao Wang,Peng Liu,Chao Yang,Bin Mu,Aiqin Wang
The rhodamine B-attapulgite/polypyrrole (RhB-ATP/PPy) composites have been prepared by the in situ chemical oxidative polymerization method based on the self-assembly of pyrrole on the surface of the rhodamine B modified ATP (RhB-ATP). The morphologies of the RhB-ATP/PPy composites prepared with different feeding ratio of pyrrole and the RhB-ATP were compared with transmission electron microscope (TEM) technique. The electrochemical behaviors of the RhB-ATP/PPy composites were investigated by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and galvanostatic charge–discharge. The results indicated that RhB did effectively improve the electrochemical performance and cycling stability of the RhB-ATP/PPy composite electrode, although RhB showed no obvious effect on the morphology of the nanocomposites . It was attributed to the fact that RhB and ATP provided a more convenient pathway to the charge carrier and RhB made the combination of the ATP and PPy much stronger. The maximum discharge capacity of the composites electrode achieved 587 F g −1 and kept 76% of its original specific capacitance after 500 cycles.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS COMMUNICATIONS
·
2017
·
IF 3.33
Bing Li,Luwei Li,Qing Zhang,Weizheng Weng,Huilin Wan
Fructose is generated from glucose isomerization in water over attapulgite without any addition of metal compounds. The formation of fructose was related closely to the calcination processing of attapulgite. The highest fructose yield of 20.6% was obtained with the selectivity of 77.9% over attapulgite calcined at 500 °C. Moreover, attapulgite was characterized by BET, XRD, IR and CO 2 -TPD techniques. The results indicated that proper distribution and amount of basic sites were crucial for the selectivity of fructose as well as the structural properties of attapulgite.
研究领域:
化学工程
·
催化材料科学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2018
·Vol. 10
·期 11
·1236
·
IF 2.935
Chengshuang Wang,Lili Dai,Zhengrui Yang,Chengcheng Ge,Shuiping Li,Meng He,Liang Ding,Hongfeng Xie
Polyurethane/attapulgite (PU/ATT) nanocomposites derived from castor oil were prepared by incorporation of 8 wt % ATT, acid-treated ATT, and KH560-treated ATT. The effects of three ATTs (ATT, acid-ATT, and KH560-ATT) on the comprehensive properties of PU/ATT nanocomposites were systematically investigated. The results showed that the incorporation of 8 wt % of three ATTs could produce an obvious reinforcement on the castor oil-based PU and that the silane modification treatment, rather than the acid treatment, has the more effective reinforcement effect. SEM images revealed the uniform dispersion of ATT in the PU matrix. DMA confirmed that the storage modulus and glass transition temperature (Tg) of PU/ATT nanocomposites were significantly increased after blending with different ATTs. For PU/KH560-ATT8 nanocomposites, the thermal stability of the PU was obviously enhanced by the addition of KH560-ATT. In particular, 8 wt % KH560-ATT loaded castor oil-based PU nanocomposites exhibit an obvious improvement in tensile strength (255%), Young’s modulus (200%),Tg(5.1 °C), the storage modulus at 25 °C (104%), and the initial decomposition temperature (7.7 °C). The prepared bio-based PU materials could be a potential candidate to replace petroleum-based PU products in practical applications.Keywords:polyurethane;castor oil;attapulgite;nanocomposites;reinforcement
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
JOURNAL OF COMPOSITE MATERIALS
·
2015
·
IF 1.173
Guofu Ma,Feitian Ran,Enke Feng,Zhe Zhang,Ziqiang Lei
A novel, low-cost, and eco-friendly organic–inorganic composite superabsorbent is successfully prepared in aqueous solution by graft copolymerization of partially neutralized acrylic acid (AA), polyvinyl alcohol (PVA), and attapulgite (APT) using ammonium persulfate (APS) as an initiator and N,N-methylenebisacrylamide (MBA) as a crosslinker. The structure and morphology of the composite superabsorbent are characterized by means of Fourier transform infrared, X-ray diffraction, field-emission scanning electron microscopy, and transmission electron microscopy. The effects of APT content which can affect the water absorbency and the pH, ionic surfactants and different saline solution which can affect swelling capabilities of the composite superabsorbent are also investigated. The results show the composite superabsorbent give the best absorption up to 680 g/g and 53 g/g in distilled water and 0.9 wt% NaCl solution, high water absorbency over a wide pH range of 4–10, high swelling capacity in anionic surfactant than that of cationic solution, which makes it promising for potential applications in modern agriculture and horticulture. On the other hand, the composite superabsorbent can be used for removing multivalent metal ions.
研究领域:
材料科学
·
环境科学
·
农业科学
✓ 已验证
DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2018
·Vol. 44
·期 11
·6963-6977
·
IF 1.674
Ma Xijun,Zhang Yingying,Zhou Jiuyang,Xue Yuanyuan,Shang Linjie,Xie Xingyong,Wu Zhengyan,Zhang Jing
A trisynergetic system (AFB) of nanoscale zero-valent iron (NI)–biofilm supported on attapulgite (ATP) was used to degrade nitrobenzene (NTB) in aqueous solution. We first synthesized a nanocomposite of ATP, polyvinyl alcohol, and NI as the growth carrier (AP-NI) for the biofilm. The activity of the biofilm was determined after its successful application, and the microorganisms were domesticated using NTB wastewater. The specific surface area of the AP-NI carrier was 158 m 2 /g, much higher than that of the traditional carrier polyvinyl alcohol (30.1 m 2 /g). AP-NI could be evenly distributed in water rather than settling, due to its average density of 0.647 g/m 3 . Additionally, the reductive efficiency of AP-NI towards NTB was about 91%, providing good support for the subsequent construction of the biofilm. Scanning electron microscopy (SEM) results indicated that the microorganisms were dominated by globular bacteria after acclimation, and could completely degrade 8 mg/L NTB in 24 h with high activity. The microbial activity depended more strongly on the choice of carbon source. Finally, polymerase chain reaction denaturing gradient gel electrophoresis (PCR-DGGE) technology was used to analyze the microbial community structure and 16S ribosomal DNA (rDNA) sequence. The NTB degradation mechanism of the trisynergetic system revealed a mainly aerobic pathway with an iron cycle.
研究领域:
环境科学
·
微生物学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）