Effect of different concentrations of spraying chitosan solution on structure and properties of PVDF porous membrane

2021 ◽  
Author(s):  
Chenyang Wang ◽  
Shijie Cheng ◽  
Hongjun Li ◽  
Danying Zuo
Keyword(s):  
Chitosan Solution ◽  
Porous Membrane ◽  
Structure And Properties

Effect of different preparation methods on structure and properties of chitosan/poly-lactic acid blend porous membrane

2012 ◽  
Vol 19 (6) ◽  
pp. 1015-1022 ◽  
Author(s):  
Dan-Ying Zuo ◽  
Hong-Jun Li ◽  
Hong-Tao Liu ◽  
San-Ping Zhao
Keyword(s):  
Lactic Acid ◽  
Porous Membrane ◽  
Poly Lactic Acid ◽  
Structure And Properties ◽  
Preparation Methods

Optimization of structure and properties of polyphenylene sulfide porous membrane by controlling the process of thermally induced phase separation

2020 ◽  
Vol 69 (9) ◽  
pp. 813-821
Author(s):  
Zhongchen He ◽  
Hongqing Ren ◽  
Junfeng Li ◽  
Tingjian Huang ◽  
Shengchang Zhang ◽  
...  
Keyword(s):  
Phase Separation ◽  
Porous Membrane ◽  
Polyphenylene Sulfide ◽  
Structure And Properties ◽  
Thermally Induced Phase Separation ◽  
Thermally Induced

scholarly journals Fabrication and Permeability Characteristics of Microdialysis Probe Using Chitosan Nanoporous Membrane

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
Yun-Ju Chuang ◽  
Mei-Jung Chen ◽  
Pei-Ru Chen
Keyword(s):  
Molecular Diffusion ◽  
Chitosan Solution ◽  
Porous Membrane ◽  
Mixing Ratio ◽  
Gelatin Nanoparticles ◽  
Microdialysis Probe ◽  
Permeability Characteristics ◽  
Nanoporous Membrane

In this article, a nanoporous chitosan polymer membrane was successfully produced and applied as microdialysis membrane forin vitrosampling of biomolecules. With the use of nanoparticle leaching technique, porogenic gelatin nanoparticles formed nanopores in the chitosan-based membrane to create a secure implantable nanoporous membrane for biomolecule sampling. The gelatin nanoparticles size was in the range of 45 to 70 nm, and the pore size of the chitosan membrane was around 40 to 100 nm. The porosity of membrane was found to be dependent on the mixing ratio of chitosan solution and gelatin nanoparticles solution. The results of diffusion study showed that we can alter the mixing ratio of porogen to achieve size-selective molecular diffusion, which means that the porosity and cut-off size of porous membrane can be controlled. The recoveries of the probe fabricated from the chitosan-based membrane were examined for four different model compounds of different molecular weights: 2-NBDG, substance P, TNF-α, and FITC-BSA. The microdialysis probes showed linear responses and substantial recovery to various concentrations of biomolecules. These results indicated that the microdialysis probe constructed by chitosan nanoporous membrane could sample and monitor the biomoleculesin vitroand has the potential for the applicationin vivo.

Structure of second phases in TiAl alloys containing Cr and B

1991 ◽  
Vol 49 ◽  
pp. 576-577
Author(s):  
Ernest L. Hall ◽  
Shyh-Chin Huang
Keyword(s):  
Grain Size ◽  
Second Phase ◽  
Structure And Properties ◽  
Tial Alloys ◽  
Second Phases ◽  
Interstitial Elements

Addition of interstitial elements to γ-TiAl alloys is currently being explored as a method for improving the properties of these alloys. Previous work in which a number of interstitial elements were studied showed that boron was particularly effective in refining the grain size in castings, and led to enhanced strength while maintaining reasonable ductility. Other investigators have shown that B in γ-TiAl alloys tends to promote the formation of TiB2 as a second phase. In this study, the microstructure of Bcontaining TiAl alloys was examined in detail in order to describe the mechanism by which B alters the structure and properties of these alloys.

Relationships between hierarchical structure and properties in macromolecular systems

1987 ◽  
Vol 45 ◽  
pp. 440-443
Author(s):  
E. Baer
Keyword(s):  
Uniaxial Tension ◽  
Hierarchical Structure ◽  
Inorganic Material ◽  
Hierarchical Structures ◽  
Bone Collagen ◽  
Structure And Properties ◽  
Connective Tissues ◽  
Scale Level ◽  
Fibrous Protein ◽  
Macromolecular Systems

The most advanced macromolecular materials are found in plants and animals, and certainly the connective tissues in mammals are amongst the most advanced macromolecular composites known to mankind. The efficient use of collagen, a fibrous protein, in the design of both soft and hard connective tissues is worthy of comment. Very crudely, in bone collagen serves as a highly efficient binder for the inorganic hydroxyappatite which stiffens the structure. The interactions between the organic fiber of collagen and the inorganic material seem to occur at the nano (scale) level of organization. Epitatic crystallization of the inorganic phase on the fibers has been reported to give a highly anisotropic, stress responsive, structure. Soft connective tissues also have sophisticated oriented hierarchical structures. The collagen fibers are “glued” together by a highly hydrated gel-like proteoglycan matrix. One of the simplest structures of this type is tendon which functions primarily in uniaxial tension as a reinforced elastomeric cable between muscle and bone.

The Structure and Properties of MoSi2 Thin Film in Mos Process

1980 ◽  
Vol 38 ◽  
pp. 326-327
Author(s):  
C.K. Wu ◽  
P. Chang ◽  
N. Godinho
Keyword(s):  
Thin Film ◽  
Integrated Circuits ◽  
High Performance ◽  
Large Scale ◽  
Process Development ◽  
Structure And Properties ◽  
Metal Silicides ◽  
High Oxidation ◽  
Important Approach ◽  
High Oxidation Resistance

Recently, the use of refractory metal silicides as low resistivity, high temperature and high oxidation resistance gate materials in large scale integrated circuits (LSI) has become an important approach in advanced MOS process development (1). This research is a systematic study on the structure and properties of molybdenum silicide thin film and its applicability to high performance LSI fabrication.

Structure and properties of H5O2+

1991 ◽  
Vol 88 ◽  
pp. 411-420 ◽  
Author(s):  
D Peeters ◽  
G Leroy
Keyword(s):  
Structure And Properties

CRYSTAL STRUCTURE AND PROPERTIES OF NEW CADMIUMAND THALLIUM-CONTAINING PEROVSKITES

1972 ◽  
Vol 33 (C2) ◽  
pp. C2-241-C2-242
Author(s):  
Yu. N. VENEVTSEV ◽  
A. G. KAPYSHEV ◽  
V. M. LEBEDEV ◽  
V. D. SAL'NIKOV ◽  
G. S. ZHDANOV
Keyword(s):  
Crystal Structure ◽  
Structure And Properties
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