نتایج جستجو برای: polyvinylidene fluoride

تعداد نتایج: 20344  

2016
Zhengnan Zhou Weiping Li Tianrui He Lei Qian Guoxin Tan Chengyun Ning

To enhance the surface bioactivity of titanium (Ti) prostheses, an electroactive polyvinylidene fluoride (PVDF) film was prepared on a Ti substrate to provide a mimetic of the electrical microenvironment, which facilitated the performance of cell functions. The results of cell proliferation and differentiation assays indicated that polarization of the PVDF-Ti (PTi) altered its surface charge, t...

2015
Zen-Wei Ouyang Erh-Chiang Chen Tzong-Ming Wu

This work describes the thermal stability and magnetic properties of polyvinylidene fluoride (PVDF)/magnetite nanocomposites fabricated using the solution mixing technique. The image of transmission electron microscopy for PVDF/magnetite nanocomposites reveals that the 13 nm magnetite nanoparticles are well distributed in PVDF matrix. The electroactive β-phase and piezoelectric responses of PVD...

Journal: :The journal of obstetrics and gynaecology research 2016
Jordi Sabadell Francisco Larrain Ana Gracia-Perez-Bonfils Anabel Montero-Armengol Sabina Salicrú Antonio Gil-Moreno Jose L Poza

Aims Evaluate the effectiveness and safety of polyvinylidene fluoride (PVDF) transobturator suburethral slings/tapes (TOTs) in the treatment of stress urinary incontinence, and compare them to polypropylene (PP) slings. Material and Methods A retrospective cohort study was performed on women treated with a TOT procedure at Vall d'Hebron Hospital between February 2010 and May 2013. A PVDF sling ...

Journal: :Environmental science & technology 2016
Chanhee Boo Jongho Lee Menachem Elimelech

Microporous membranes fabricated from hydrophobic polymers such as polyvinylidene fluoride (PVDF) have been widely used for membrane distillation (MD). However, hydrophobic MD membranes are prone to wetting by low surface tension substances, thereby limiting their use in treating challenging industrial wastewaters, such as shale gas produced water. In this study, we present a facile and scalabl...

2017
Minwei Yao Yun Chul Woo Leonard D. Tijing Kyong Shon Enrico Drioli

Electrospun membranes are gaining interest for use in membrane distillation (MD) due to their high porosity and interconnected pore structure; however, they are still susceptible to wetting during MD operation because of their relatively low liquid entry pressure (LEP). In this study, post-treatment had been applied to improve the LEP, as well as its permeation and salt rejection efficiency. Th...

2013
M. Essalhi P. Arribas

The experimental design and response surface methodology (RSM) have been used to develop predictive models for simulation and optimization of electrospun polyvinylidene fluoride non-woven membranes. The objective is to prepare electrospun fibers with small diameters and narrow diameter distribution. The factors considered for experimental design were the polymer dope solution flow rate, the app...

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