COLLOIDS AND SURFACES B-BIOINTERFACES
·
2015
·
IF 4.152
Jianwei Zhang,Xueyong Li,Jing Tian,Yuan Lu,Xiaowen Shi,Yingfei Zhan,Yumin Du,Huan Liu,Hongbing Deng
Rectorite (REC)-encapsulated lysozyme (LY)-alginate (ALG) nanogels (NGs) were prepared by adding ALG-REC composites suspensions into LY solutions at the mass ratio of 1:2. The morphology of the NGs and the NGs-assembled nanofibrous mats were studied by transmission electron microscope and field emission scanning electron microscopy, respectively. The composition of NGs-immobilized nanofibrous mats was detected by X-ray photoelectron spectroscopy. The NGs-assembled nanofibrous mats with the addition of REC could enhance the inhibition against Escherichia coli and Staphylococcus aureus. Additionally, NGs-coated mats reduced the toxicity of cellulose mats on mouse lung fibroblasts using MTT assay. Besides, the addition of REC in the NGs improved the cell compatibility of NGs-assembled nanofibrous mats.
研究领域:
材料科学
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生物医学工程
·
微生物学
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DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2014
·Vol. 131
·期 20
·
IF 1.64
Guoxiang Li,Daichan Lu,Xindan Shi,Mingyue Cai
By blending chitin with rectorite and organic rectorite in an 8 wt % NaOH/4 wt % urea aqueous solution, we successfully fabricated millimeter-scale chitin/rectorite composite beads (BCRs) and chitin/organic rectorite beads (BCO), respectively, via an optimal dropping technology. The adsorption of the organic dyes on the BCRs and BCOs were investigated to evaluate the selective removal of methylene blue (MB) and methyl orange (MO) of different charges. Adsorption kinetics experiments were carried out, and the data fit a pseudo-second-order equation well. The results reveal that the BCR and BCO sorbents efficiently and selectively adsorbed MO and MB, respectively, from wastewater. The adsorption capacity ( Q e ) and removed percentage of MB by BCR were 0.1978 mg/g and 98.90%. The Q e and R values of MO by BCO were 0.3988 mg/g and 99.70%. Therefore, in this study, we dealt with the development of a clean and safe process for water pollution remediation. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 40905.
研究领域:
环境科学
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材料科学
·
化学工程
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DOI
高影响因子
Journal of Coatings Technology and Research
·
2016
·Vol. 14
·期 1
·107-115
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IF 1.342
Wang Ying,Cao Zhichao,Liu Fengguo,Xue Xiangxin
Epoxy acrylate (EA) coatings modified with organically modified rectorite (OREC) were synthesized employing the ultraviolet-curing technique. Two kinds of alkyl ammonium ions, octadecyltrimethylammonium chloride (OTAC) and [2-(methacryloyloxy)ethyl]trimethylammonium chloride (MAOTMA), were used to modify rectorite (REC). The methacrylate functionalities of MAOTMA were capable of reacting with the acrylate groups of EA. The structure of OREC was characterized by FTIR and XRD and the results indicated that the surfactants were successfully intercalated into the REC interlayers via cation exchange process. The morphology of nanocomposites was investigated by SEM and TEM. OREC showed better dispersion in EA matrix compared with unmodified REC. The T
g of neat EA obtained by DMA was 75.6°C, while for 5 wt% EA/MAOTMA-REC and EA/OTAC-REC nanocomposites it increased to 76.5 and 80.8°C, respectively. The nanocomposite with 3 wt% loading of OTAC-REC had the highest T
g (89.7°C). TGA revealed that the thermal stability of nanocomposites was enhanced by OTAC-REC and MAOTMA-REC and the thermal stability of EA/MAOTMA-REC nanocomposites was better than that of EA/OTAC-REC nanocomposites. The mechanical properties of nanocomposites containing OTAC-REC and MAOTMA-REC were better than those of nanocomposites containing unmodified REC. With increasing OREC content, the adhesive force of nanocomposites decreased slightly and the flexibility increased significantly.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
ACS Biomaterials Science & Engineering
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2021
·
IF 4.749
Hu Tu,Fangfang Dai,Gu Cheng,Mengqin Yuan,Xue Zhou,Yanqing Wang,Ruquan Zhang,Yajing Zheng,Yanxiang Cheng,Hongbing Deng
Searching for drug carries with controlled release and good biocompatibility has always been one of the research hotspots and difficulties. Herein, core–sheath nanofibrous mats (NFs) consisting of biocompatible poly(ethylene oxide) (PEO, core) and poly(l-lactic acid) (PLLA, sheath) for drug delivery were fabricated via coaxial electrospinning strategy. The nontoxic layered silicate rectorite (REC) with 0.5–1 wt % amount was introduced in the sheath for sustained drug delivery. Layered REC could be intercalated with PLLA macromolecule chains, leading to the densified structure for loading and keeping doxorubicin hydrochloride (DOX) while reversibly capturing and releasing DOX to delay the drug migration due to its high cation activity. The addition of REC in NFs could delay the initial burst release of DOX and prolong the residence time from 12 to 96 h. Moreover, DOX-loaded core–sheath NFs had in vitro culture with strong antitumor activity, which was confirmed by cytotoxicity results and live and dead assay. HepG2 tumor-bearing xenograft further demonstrated the tumor-suppression effect and the excellent safety of the DOX-loaded core–sheath NFs in vivo. The constructed NFs as drug carriers showed great potential in the local treatment of solid tumors.
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PubMed
高影响因子
Journal of Cleaner Production
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2021
·
IF 9.297
Lian Yi,Yubiao Li,Liangliang Zhu,Caiyan Gao,Xiaoyong Wu
Developing a low-cost and excellent catalyst for advanced oxidation process (AOPs) to degrade refractory organic contaminants is still an urgent problem. In this work, a copper oxide decorated natural rectorite (Cu-R) catalyst was successfully synthesized by a facile impregnation method. Intriguingly, Cu-R possessed excellent performance in removing tetracycline (TC) through photoinduced peroxymonosulfate (PMS) activation, and its reaction rate constants were ca. 4.3 times and 7.0 times that of Fe 2 O 3 and Co 3 O 4 , respectively. Moreover, the effects of reaction parameters on the photoinduced Cu-R activation of PMS to degrade TC were investigated in detail. The results showed that the system exhibited excellent impact resistance to Cl − , HCO 3 − and NO 3 − in aqueous solution. Cu-R could not only exhibit excellent removal of TC in a wide pH range of 5–9, but also maintain the stability of the catalyst. The electron paramagnetic resonance test and quenching experiments proved that the excellent TC removal ability could be mainly attributed to the synergistic effect between CuO and rectorite under the assistant of light, which was beneficial for the activation of PMS and then produced a large number of active radicals such as •OH and O 2 • - . Importantly, a possible path for TC degradation was given by the LC-MS analysis. The prepared Cu-R can provide a low-cost, high-efficiency and promising catalyst for the treatment of antibiotic wastewater by PMS activation with photoassistent.
研究领域:
环境科学
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催化材料
·
废水处理
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Yiwei Wang,Guanhua Yu,Zihe Wang,Jiangheng Jia,Song Ding,Haifeng Bu,Yihang Zhang,Shengchun Shen,Yuan Fang,Songchao Chu,Shuhong Yu,Yuewei Yin,Xiaoguang Li
Biaxially oriented polypropylene (BOPP), a state-of-the-art commercially benchmark dielectric material for thin-film capacitors dominating modern electrostatic capacitor technologies, suffers from performance degradation above 85 °C. To address the limitation, a scalable strategy combining bulk γ-ray irradiation and surface nano-coating is developed to enhance the high-temperature capacitive energy storage performance. At 125 °C, the irradiated BOPP film coated with rectorite nanosheets (RNs) achieves a high energy density of 2.8 J cm −3 at 500 MV m −1 with 95% efficiency, representing a 250% enhancement relative to pristine BOPP and outperforming reported PP-based dielectrics. Notably, the composite film sustains 1.8 J cm −3 energy density at 98% efficiency through 30,000 charge-and-discharge cycles under 400 MV m −1 at 125 °C. Experimental and theoretical analyses reveal the underlying mechanism that the negatively charged and wide-bandgap RNs suppress charge injection, while the polar groups in BOPP introduced by γ-irradiation provide deep-energy traps to block the movement of charge carriers within the dielectric. This optimization approach establishes a design paradigm for high-temperature polymer dielectrics and brings new insights into bulk and interfacial engineering.
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高影响因子
KOREAN JOURNAL OF CHEMICAL ENGINEERING
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2020
·Vol. 37
·期 5
·776-783
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IF 2.69
Liu Xinghao,Hu Shuheng,Xu Di,Shao Dadong
Uranium (VI), as a toxic contaminant, is a potential detriment to human health and environmental safety. In this experiment, carboxymethyl cellulose/Ca-rectorite composite material (Ca-REC/CMC) was prepared by crosslinking reaction to remove U(VI) from the liquid. The crystal structure was detected by X-ray diffraction (XRD) and surface structure and morphology of the materials were investigated by scanning electron microscopy (SEM). The surface functional groups of prepared materials were detected by Fourier transform infrared spectroscopy (FT-IR). The adsorption capacity of Ca-REC/CMC improved obviously after being modified by CMC. The adsorption capacity of Ca-REC/CMC was closely related to ionic strength and pH. According to thermodynamic parameter calculation, the adsorption process was endothermic and spontaneous. Adsorption isotherms could be depicted perfectly by the Langmuir model. Ca-REC/CMC maintained stability and regeneration after recycling six times. The adsorption mechanism, including electrostatic interactions and ionic interaction, was investigated by the X-ray photoelectron spectroscopy (XPS). Ca-REC/CMC is considered as remarkable potential material for removing U(VI) from the water environment.
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高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2018
·
IF 4.513
Zhiming Sun,Ankang Song,Bin Wang,Gaofeng Wang,Shuilin Zheng
Organo-rectorites (ORts) modified with different quaternary ammonium salts were prepared to remove polar mycotoxin aflatoxin B 1 (AFB 1 ) and weak polar, hydrophobic mycotoxin zearalenone (ZER). The structural and surface properties of the prepared ORts were studied. The intercalation of organic cationic surfactants expanded the interlayer of rectorite and increased the hydrophobicity . In vitro adsorption experiments were carried out to simulate the in vivo conditions of gastrointestinal tract of animals by a batch mode. The prepared ORts showed super enhanced adsorption capacities towards AFB 1 and ZER compared with raw rectorite, indicating the effectiveness of the prepared ORts as mycotoxins adsorbents. The ORts modified with longer chain surfactant molecules possessed a higher adsorption capacity towards mycotoxins. In addition, with increasing the modifier dosage, the adsorption capacity increased first and then decreased. The best adsorption capacity was achieved when the dosage of the modifier increased to 2.0CEC. The adsorption of both AFB 1 and ZER onto ORts could be well described by Langmuir model. In the binary-contaminant system, the existence of AFB 1 would bring negative effect to the adsorption of ZER. On the other hand, the adsorption of ZER was in favor of the adsorption of AFB 1 molecules. The solution pH had negligible influence on the adsorption process of ORts both in single system and binary system, indicating no desorption occurred when the adsorbents pass through from stomach to intestine as animal feed. This study demonstrates that the received ORts could be a promising adsorbent for detoxication of different mycotoxins in real application.
研究领域:
环境科学
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毒理学
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材料科学
·
农业化学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Qihang Zhao,Weiwei Yin,Muhammad Tariq Sarwar,Chao Gao,Kehui Yuan,Huaming Yang
Metal-free g-C 3 N 4 -based materials with peroxymonosulfate (PMS) activation through radical and non-radical reaction has extensively attracted attention for degrading pollutants in wastewater. However, the systematic study of the microstructure and activation mechanism of g-C 3 N 4 -based materials with PMS is challenging owing to the confusion of the charge transfer process and the coexistence of multiple reactive oxygen species . Herein, we develop a simple thermal annealing strategy to regulate the surface structure and interface behavior of g-C 3 N 4 /rectorite (CN/Rec) catalysts. The obtained thermal annealing CN/Rec catalyst exhibits outstanding reactivity for efficient removal of dyes via activating PMS within 5 min under visible light irrational. Benefiting from the interfacial charge transfer, large surface area and tuned active sites, thermal annealing CN/Rec catalyst indicates remarkable durability over complex conditions, recyclability after five consecutive runs and versatility for the different pollutants. This work strongly provides the mechanistic understanding of the interfacial charge-dependent PMS activation in thermal annealing CN/Rec catalysts and develops an efficient approach for actual water purification .
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高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2019
·
IF 4.561
Yao Shen,Xuwei Yu,Yingru Wang
In this study, the natural pure rectorite (REC) with regular interlayer structure and cation-exchange character was successfully modified by cationic surfactant cetyl trimethyl ammonium bromide (CTAB), the obtained the organic-modified rectorite (M-RCE) was used to remove anionic dye acid orange (AO) from water. The results showed that CTAB was intercalated into the interlayer of pure REC, and the interlayer distance of M-REC was enlarged from 2.57 nm to 2.93 nm. Zeta potential analysis showed that the surface charge of M-RCE was changed from negative to positive after modification. The uptake of AO increased along with increased the dosage of M-REC, while solution pH was not affected the removal efficiency of AO. The adsorption isotherm was well-described by Langmuir model, the calculated AO adsorption capacity was 98.59 mg/g, and the adsorption kinetic data fitted a pseudo-second order model. The adsorption mechanism analysis confirmed that electrostatic attraction between the positively charged M-REC surface and the negatively charged AO played a key role in the high uptake of AO from water.
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高影响因子
INTERNATIONAL JOURNAL OF PHARMACEUTICS
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2015
·
IF 3.65
Hu Tu,Yuan Lu,Yang Wu,Jing Tian,Yingfei Zhan,Zhaoyang Zeng,Hongbing Deng,Linbin Jiang
The composite nanoparticles (NPs) consisted of quaternized chitosan (QC)/bovine serum albumin (BSA)/rectorite (REC) were prepared successfully just by adding BSA solution into QC-REC nanocomposites solution via electrostatic interactions. The average diameter of NPs increased with the accretion of REC, which was demonstrated with dynamic laser scattering (DLS) and transmission electron microscopy (TEM). The results of small angle X-ray diffraction (SAXRD) and selected area electron diffraction (SAED) demonstrated that the intercalated structure of REC was enlarged with the addition of REC. Besides, it can was proved that the interaction had occurred between QC and REC in NPs with fourier transform infrared (FT-IR) and X-ray photoelectron spectroscopy (XPS). In addition, doxorubicin (DOX) was used to investigate the entrapment efficiency and release pattern in NPs. It turned out to be that the addition of REC could increase the encapsulation efficiency (EE) and loading capacity (LC). The results also exhibited that the drug release in simulated gastric fluid reduced apparently with the addition of REC, which could ensure more DOX released in intestines.
研究领域:
药剂学
·
材料科学
·
生物医学工程
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DOI
PubMed
高影响因子
APPLIED CLAY SCIENCE
·
2019
·
IF 3.89
Zhiming Sun,Jie Xu,Gaofeng Wang,Ankang Song,Chunquan Li,Shuilin Zheng
Mycotoxins contamination has been a worldwide long-standing issue, which poses tremendous threats to human health and food security. However, the detoxification of various mycotoxins, especially apolar species, is still a big challenge at present. In this study, carbon nanoparticles derived from biopolymer chitosan (Cts) and rectorite supported Cts carbon nanocomposite ( [email protected] ) were fabricated via hydrothermal treatment as efficient mycotoxin adsorbents for apolar zearalenone (ZER). Microstructural analysis revealed that Cts nanoparticles with smaller sizes uniformly distributed on the surface of rectorite, forming the [email protected] biocomposite . The obtained two adsorbents contained high organic carbon contents and large specific surface areas, which exhibited superior adsorption efficiency towards ZER. Kinetic study indicated that the adsorption of ZER on Cts and [email protected] reached equilibrium within 120 min, and the adsorption process fitted pseudo-second-order kinetic model better. The adsorption isotherms of ZER on both adsorbents matched obviously with linear model, which implied the existence of adsorption/partition model mechanism. The adsorption capacities were found to be positively correlated to the organic carbon contents and specific surface areas, suggesting that organic matter functioned as partition medium for ZER and the enhanced specific surface areas provided sorption sites for ZER. Furthermore, no desorption happened when changed the simulated pH based on the values from gastric fluid to intestinal fluid, confirming the feasibility of resultant Cts and [email protected] biocomposite as mycotoxins adsorbents in vivo.
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高影响因子
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