Smart Nanofibrous Membranes with Controllable Porous Structure and Surface Wettability for High Efficient Separation Materials

The protection of stone cultural assets is related to the transformation of the surface characteristic from hydrophilic to hydrophobic/superhydrophobic through the application of a coating. The suitability of a coating depends not only on its capability to dramatically change the surface wettability, but also on other parameters such as the modification of kinetics of water absorption, the permanence of vapor diffusivity, the resistance of the coating to aging and the low volatile organic compound emissions during its application. In this work, an oligo(ethylensuccinamide) containing low molecular pendant perfluoropolyether segments (SC2-PFPE) and soluble in environmentally friendly solvents was tested as a protective agent for historic stone artifacts. Magnetic resonance imaging and relaxometry were employed to evaluate the effects of the surface wettability change, to follow the water diffusion inside the rock and to study the porous structure evolution after the application of SC2-PFPE. A sun-like irradiation test was used to investigate the photo-stability of the product. The results demonstrate that the highly photo-stable SC2-PFPE minimizes the surface wettability of the stone by modifying the water sorptivity without significantly affecting its porous structure and vapor diffusivity. The improved performance of SC2-PFPE in comparison to other traditional coatings makes it a potential candidate as an advanced coating for stone cultural heritage protection.

Download Full-text

Automatic Dissolution Testing with High-Temporal Resolution for Both Immediate-Release and Fixed-Combination Drug Tablets

Scientific Reports ◽

10.1038/s41598-019-53750-w ◽

2019 ◽

Vol 9 (1) ◽

Cited By ~ 2

Author(s):

Zhongmei Chi ◽

Irfan Azhar ◽

Habib Khan ◽

Li Yang ◽

Yunxiang Feng

Keyword(s):

High Speed ◽

Sequential Analysis ◽

Immediate Release ◽

Drug Dissolution ◽

High Temporal Resolution ◽

Dissolution Profile ◽

Dissolution Testing ◽

Combination Drug ◽

Efficient Separation ◽

High Efficient

AbstractDissolution testing plays many important roles throughout the pharmaceutical industry, from the research and development of drug products to the control and evaluation of drug quality. However, it is a challenging task to perform both high-efficient separation and high-temporal detection to achieve accurate dissolution profile of each active ingredient dissolved from a drug tablet. In our study, we report a novel non-manual-operation method for performing the automatic dissolution testing of drug tablets, by combining a program-controlled sequential analysis and high-speed capillary electrophoresis for efficient separation of active ingredients. The feasibility of the method for dissolution testing of real drug tablets as well as the performance of the proposed system has been demonstrated. The accuracy of drug dissolution testing is ensured by the excellent repeatability of the sequential analysis, as well as the similarity of the evaluation of dissolution testing. Our study show that the proposed method is capable to achieve simultaneous dissolution testing of multiple ingredients, and the matrix interferences can be avoided. Therefore it is of potential valuable applications in various fields of pharmaceutical research and drug regulation.

Download Full-text

High efficient separation of U(VI) and Th(IV) from rare earth elements in strong acidic solution by selective sorption on phenanthroline diamide functionalized graphene oxide

Chemical Engineering Journal ◽

10.1016/j.cej.2017.09.038 ◽

2018 ◽

Vol 332 ◽

pp. 340-350 ◽

Cited By ~ 36

Author(s):

Fuhai Li ◽

Zheng Yang ◽

Hanqin Weng ◽

Geng Chen ◽

Mingzhang Lin ◽

...

Keyword(s):

Graphene Oxide ◽

Rare Earth ◽

Rare Earth Elements ◽

Acidic Solution ◽

Functionalized Graphene ◽

Functionalized Graphene Oxide ◽

Selective Sorption ◽

Efficient Separation ◽

High Efficient

Download Full-text

Poly(lactic-co-glycolic acid)/Polycaprolactone Nanofibrous Membranes for High-Efficient Capture of Nano- and Microsized Particulate Matter

Journal of Biomedical Nanotechnology ◽

10.1166/jbn.2018.2465 ◽

2018 ◽

Vol 14 (1) ◽

pp. 179-189 ◽

Cited By ~ 8

Author(s):

Wenshi Xu ◽

Mengyu Guo ◽

Jing Liu ◽

Yating Xiao ◽

Guoqiang Zhou ◽

...

Keyword(s):

Particulate Matter ◽

Glycolic Acid ◽

High Efficient ◽

Nanofibrous Membranes

Download Full-text

Tailoring waterproof and breathable properties of environmentally friendly electrospun fibrous membranes by optimizing porous structure and surface wettability

Composites Communications ◽

10.1016/j.coco.2019.06.002 ◽

2019 ◽

Vol 15 ◽

pp. 40-45 ◽

Cited By ~ 7

Author(s):

Jing Zhao ◽

Weixia Zhu ◽

Weian Yan ◽

Xianfeng Wang ◽

Lifang Liu ◽

...

Keyword(s):

Porous Structure ◽

Environmentally Friendly ◽

Surface Wettability ◽

Fibrous Membranes

Download Full-text

New challenge of metal–organic frameworks for high-efficient separation of hydrogen chloride toward clean hydrogen energy

Journal of Materials Chemistry A ◽

10.1039/c4ta06832g ◽

2015 ◽

Vol 3 (10) ◽

pp. 5275-5279 ◽

Cited By ~ 11

Author(s):

Jia Liu ◽

Wei Xia ◽

Weijun Mu ◽

Peizhou Li ◽

Yanli Zhao ◽

...

Keyword(s):

Molecular Dynamic ◽

Hydrogen Chloride ◽

Metal Organic Frameworks ◽

Energy Resource ◽

Molecular Dynamic Simulations ◽

Hydrogen Energy ◽

Dynamic Simulations ◽

Efficient Separation ◽

High Efficient ◽

Metal Organic

Eleven metal–organic frameworks are used for H2/HCl separation by real breakthrough experiment and molecular dynamic simulations, affording clean hydrogen energy resource with purity >99.997% from chlor-alkali industry exhaust.

Download Full-text

Monocyclic Aromatic Compounds Detection with High Field Asymmetry Waveform Ion Mobility Spectrometry

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.538-541.2159 ◽

2012 ◽

Vol 538-541 ◽

pp. 2159-2163

Author(s):

Cong Zhao ◽

Chi Lai Chen ◽

Dian Ling Wang ◽

Ran Chen ◽

You Jiang Liu ◽

...

Keyword(s):

High Resolution ◽

Ion Mobility Spectrometry ◽

Ion Mobility ◽

Aromatic Compounds ◽

High Field ◽

Environmental Contaminants ◽

Detection Threshold ◽

Efficient Separation ◽

High Efficient ◽

The Relationship

Monocyclic aromatic compounds (MAC) are one kind of the major organic environmental contaminants. In this paper, with self-made high Field Asymmetry waveform Ion Mobility Spectrometry (FAIMS) system, the high resolution and sensitivity detection of typical MAC has been carried out. By analyzing the relationship between the Dispersion Voltages (DV) and Compensation Voltages (CV), the second and fourth order nonlinear ion mobility coefficients of Chlorobenzene, O-dichlorobenzene, P-dichlorobenzene, M-cresol, P-nitrophenol, Benzyl alcohol and O-Toluidine are obtained. The spectra of nonlinear ion mobility and the FAIMS spectra of seven kinds of MAC are acquired, and the high efficient separation of these substance ions are realized. As high as 0.95 of linearity and about 20 ppb detection threshold for chlorobenzene are also demonstrated by linear regression. These results show that FAIMS is an effective method to detect the MAC and has great potential for field detection of organic environmental contaminants.

Download Full-text