Cellulose nitrate membrane formation via phase separation induced by penetration of nonsolvent from vapor phase

Sun, Haixiang; Liu, Shengnan; Ge, Baosheng; Li, Xing; Chen, Huan-Lin

doi:10.1016/j.memsci.2007.02.019

Cited by 56 publications

(17 citation statements)

References 22 publications

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“…In addition, there had been several morphological studies relating the relative humidity of the humid surroundings in several recent papers. Sun et al had pointed out that the pore size was strongly affected by the relative humidity (RH) in the environment [10]. And a symmetric morphology and the similar influence of the RH were also reported by Park et al [11] for the polysulfone/NMP system and Caquineau et al [12] for polyetherimde/NMP system.…”

Section: Introductionmentioning

confidence: 53%

An experimental investigation of evaporation time and the relative humidity on a novel positively charged ultrafiltration membrane via dry–wet phase inversion

Gao

Tang

2009

Journal of Membrane Science

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Section: Introductionmentioning

confidence: 53%

An experimental investigation of evaporation time and the relative humidity on a novel positively charged ultrafiltration membrane via dry–wet phase inversion

Gao

Tang

2009

Journal of Membrane Science

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“…The volume of the sample (V m ) equals D × A and the volume occupied by the polymer (V p ) can be expressed as W m /ρ p , where ρ p is the density of the PVDF and has a value of 1.77 g/cm 3 . [27][28][29][30] Wide-Angle X-Ray Diffraction. X-ray diffraction patterns were collected by positioning the PVDF films on a sample holder mounted on a wide-angle X-ray diffractometer (XRD, X' Pert PRO, PANalytical, Netherlands), using Cu Kα radiation.…”

Section: Membrane Characterizationmentioning

confidence: 99%

Preparation of Symmetric Network PVDF Membranes for Protein Adsorption via Vapor-Induced Phase Separation

Cheng

Zhang

et al. 2011

Journal of Macromolecular Science, Part B

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Symmetric network poly(vinylidene fluoride) (PVDF) membranes without a dense skin layer were prepared by vapor-induced phase separation from a PVDF/N,Ndimethylacetamide (DMAc)/water system. The effects of evaporation atmosphere, temperature, and humidity during the preparation of the membranes on their morphologies were investigated by scanning electron microscope (SEM). With low temperature and high humidity, the polymer crystallization mechanism dominated the membrane formation process, and the casting solution formed membranes with symmetric morphologies in the vapor phase containing 0.79% DMAc. The effect of additives on the membrane structure and performance was also investigated. The results of adsorption experiments showed that the binding capacity of bovine serum albumin (BSA) increased with the appearance of a circular network morphology and the decrease of mean pore size of the membrane. With the addition of LiCl to the casting solution, the obtained membrane can adsorb BSA up to 150 µg/cm 2 . Proteins on sodium dodecyl sulfate (SDS) polyacrylamide gel electrophoresis gels were successfully electro-blotted onto these PVDF membranes. Compared with commercial membranes, the PVDF membranes prepared in this work were more suitable for protein blotting.

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“…The reversible change in hydrogen bonding between the two components NIPAAm and AA and water, and the ionization of carboxylate groups under different environmental condition resulted in the dualstimuli response. Chitosan based PNIPAAm films having both thermal and pH sensitivity were prepared by combination of chitosan with PNIPAAm and PEG [174].…”

Section: Polymers With Dual Stimuli-responsivenessmentioning

confidence: 99%

Drug Delivery Systems: Smart Polymeric Materials

Cassano

Trombino

2014

Advanced Polymers in Medicine

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Over the last two decades the smart polymeric materials have involved the interest of the scientific community because they can be used in the design and formulation of dosage forms that respond, with a considerable variation of their properties, to changes in their environment. As result, these materials control the drug release into specific physiological compartments. Concerning on the environmental stimuli these include pH, temperature, light, chemicals, etc. The smart polymeric materials stimuli-responsive can be synthetics or naturals and have been used in the biotechnological, medicinal and engineering fields. The present chapter is aimed to focus the importance of this category of drug delivery systems and, in particular, it provides a summarizing overview of the range of smart polymeric materials and the drug delivery systems that exploit them.

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Cellulose nitrate membrane formation via phase separation induced by penetration of nonsolvent from vapor phase

Cited by 56 publications

References 22 publications

An experimental investigation of evaporation time and the relative humidity on a novel positively charged ultrafiltration membrane via dry–wet phase inversion

An experimental investigation of evaporation time and the relative humidity on a novel positively charged ultrafiltration membrane via dry–wet phase inversion

Preparation of Symmetric Network PVDF Membranes for Protein Adsorption via Vapor-Induced Phase Separation

Drug Delivery Systems: Smart Polymeric Materials

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