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1. Electrospinning of poly (ε-caprolactone-co-lactide)/Pluronic blended scaffolds for skin tissue engineering

Author:
Ning-hua Liu; Jian-feng Pan; Yue-E Miao; Tian-xi Liu; Feng Xu; Hui Sun
Source:
Journal of materials science 2014 v.49 no.20 pp. 7253-7262
ISSN:
0022-2461
Subject:
cell adhesion; contact angle; extracellular matrix; hydrophilicity; mixing; stem cells; tensile strength; tissue engineering
Abstract:
... For skin tissue engineering, an ideal scaffold should mimic the natural extracellular matrix of the native skin. In this study, we reported a novel elastic sub-micron fiber scaffold blending poly (ε-caprolactone-co-lactide) (PLCL) and Pluronic at different ratios by electrospinning. PLCL and Pluronic were co-electrospun with the ratio of 100/0, 99/1, 95/5, 90/10, 85/15, and 75/25. These scaffolds ...
DOI:
10.1007/s10853-014-8432-8

2. Hemocompatibility and ultrafiltration performance of surface-functionalized polyethersulfone membrane by blending comb-like amphiphilic block copolymer

Author:
Haiming Song; Fen Ran; Huili Fan; Xiaoqin Niu; Long Kang; Changsheng Zhao
Source:
Journal of membrane science 2014 v.471 pp. 319-327
ISSN:
0376-7388
Subject:
X-ray photoelectron spectroscopy; adhesion; anticoagulants; artificial membranes; biocompatibility; blood platelets; cell adhesion; composite polymers; contact angle; hemodialysis; hemolysis; hydrophilicity; mixing; polymerization; polymethylmethacrylate; polyvinylpyrrolidone; separation; thromboplastin; ultrafiltration
Abstract:
... While polyethersulfone (PES) represents outstanding oxidative, thermal and hydrolytic stability as well as good mechanical and film-forming properties, the hemocompatibility of PES membrane must be dramatically enhanced to reduce injections of anticoagulants during hemodialysis. In this study, a comblike amphiphilic block copolymer poly (vinyl pyrrolidone)-block-poly (acrylate-graft-poly (methyl m ...
DOI:
10.1016/j.memsci.2014.08.013

3. High-flux, antibacterial ultrafiltration membranes by facile blending with N-halamine grafted halloysite nanotubes

Author:
Linlin Duan; Wei Huang; Yatao Zhang
Source:
RSC advances 2014 v.5 no.9 pp. 6666-6674
ISSN:
2046-2069
Subject:
Escherichia coli; Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; antibacterial properties; antibiotics; atomic force microscopy; chemical composition; contact angle; halloysite; hydrophilicity; mixing; nanotubes; porosity; scanning electron microscopy; storage modulus; transmission electron microscopy; ultrafiltration
Abstract:
... N-Halamine grafted halloysite nanotubes (N-halamine@HNTs) were used as an antibacterial agents to fabricate polyethersulfone (PES) ultrafiltration (UF) hybrid membranes. N-Halamine@HNTs were characterized by Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectra (XPS). The chemical compositions, storage modulus, tan δ, morphology and performance of the membranes were charac ...
DOI:
10.1039/c4ra14530e

4. Improved Antifouling Property of Poly(ether sulfone) Ultrafiltration Membrane through Blending with Poly(vinyl alcohol)

Author:
Yuan Haikuan; Wang Yanmei; Cheng Liang; Liu Wangcai; Ren Jie; Meng Linghao
Source:
Industrial & Engineering Chemistry Research 2014 v.53 no.48 pp. 18549-18557
ISSN:
1520-5045
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; bovine serum albumin; contact angle; dimethyl sulfoxide; engineering; ethanol; hydrophilicity; mixing; polyethylene glycol; polyvinyl alcohol; scanning electron microscopy; ultrafiltration; washing
Abstract:
... Poly(ether sulfone)–poly(vinyl alcohol) (PES–PVA) ultrafiltration (UF) membranes were prepared through phase inversion induced by an immersion precipitation method. The physicochemical properties, permeation performance, and antifouling property of the membranes were investigated. Fourier transform infrared spectra and X-ray diffraction patterns confirmed that PVA was incorporated in the PES membr ...
DOI:
10.1021/ie502797k

5. Improved hydrodynamic permeability and antifouling properties of poly(vinylidene fluoride) membranes using polydopamine nanoparticles as additives

Author:
Jin-Hong Jiang; Li-Ping Zhu; Hong-Tao Zhang; Bao-Ku Zhu; You-Yi Xu
Source:
Journal of membrane science 2014 v.457 pp. 73-81
ISSN:
0376-7388
Subject:
additives; artificial membranes; catechol; contact angle; dopamine; filtration; fluorides; hydrodynamics; hydrophilicity; mixing; nanoparticles; permeability; polymerization; polymers
Abstract:
... This study aims to improve the hydrodynamic permeability and antifouling properties of poly(vinylidene fluoride) (PVDF) membranes using bioinspired polydopamine nanoparticles (PDA NPs) as additives during membranes formation. Based on the oxidant-induced polymerization behavior of dopamine, a series of PDA NPs were first prepared in different reaction mediums. Subsequently, the synthesized PDA NPs ...
DOI:
10.1016/j.memsci.2014.01.043

6. Poly(isophthalamide) based graft copolymer for the modification of cellulose acetate ultrafiltration membranes and a fouling study by AFM imaging

Author:
A. Jayalakshmi; S. Rajesh; I.C. Kim; S. Senthilkumar; D. Mohan; Y.N. Kwon
Source:
Journal of membrane science 2014 v.465 pp. 117-128
ISSN:
0376-7388
Subject:
adsorption; artificial membranes; cellulose acetate; composite polymers; contact angle; fouling; glass transition temperature; hydrophilicity; image analysis; mixing; models; proteins; solubility; solvents; ultrafiltration
Abstract:
... Poly(isophthalamide) based copolymer, poly(isophthalamide)-graft-methacrylamide (PIPA-g-MAA) has been prepared and used to modify the surface and fouling liable properties of the cellulose acetate (CA) membranes. Grafting facilitated the solubility of PIPA in common aprotic solvents and made it available as a potential membrane material for the modification of CA membrane. Compatibility between CA ...
DOI:
10.1016/j.memsci.2014.04.020

7. Preparation and characterization of negatively charged PES nanofiltration membrane by blending with halloysite nanotubes grafted with poly (sodium 4-styrenesulfonate) via surface-initiated ATRP

Author:
Junyong Zhu; Ningning Guo; Yatao Zhang; Liang Yu; Jindun Liu
Source:
Journal of membrane science 2014 v.465 pp. 91-99
ISSN:
0376-7388
Subject:
Fourier transform infrared spectroscopy; artificial membranes; contact angle; desalination; fouling; halloysite; hydrophilicity; ion exchange capacity; magnesium chloride; mixing; molecular weight; nanofiltration; nanotubes; polymerization; scanning electron microscopy; sodium; sodium chloride; textile industry; thermogravimetry; transmission electron microscopy; wastewater treatment
Abstract:
... Sodium 4-styrenesulfonate was grafted onto the surfaces of halloysite nanotubes (HNTs) via surface-initiated atom transfer radical polymerization (SI-ATRP), and then negatively charged nanofiltration (NF) membranes were fabricated by blending various contents of HNTs-poly(sodium 4-styrenesulfonate) (HNTs-poly(NASS)) composites via phase inversion method. The grafting degree was effectively control ...
DOI:
10.1016/j.memsci.2014.04.016

8. Toward a highly hemocompatible membrane for blood purification via a physical blend of miscible comb-like amphiphilic copolymers

Author:
Fen Ran; Xiaoqin Niu; Haiming Song; Chong (Sage) Cheng; Weifeng Zhao; Shengqiang Nie; Lingren Wang; Aimei Yang; Shudong Sun; Changsheng Zhao
Source:
Biomaterials science 2014 v.2 no.4 pp. 538-547
ISSN:
2047-4849
Subject:
Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; adhesion; biocompatibility; blood coagulation; blood platelets; cell adhesion; composite polymers; contact angle; dialysis; hydrophilicity; hydrophobicity; mixing; polymerization; polyvinylpyrrolidone; thromboplastin
Abstract:
... Comb-like amphiphilic copolymers (CLACs) consisting of functional chains of poly(vinyl pyrrolidone) and polyethersulfone-based hydrophobic chains were firstly synthesized by reversible addition–fragmentation chain transfer polymerization. The CLAC can be used as an additive to blend with polyethersulfone (PES) at any ratio due to the excellent miscibility, and then a surface segregation layer with ...
DOI:
10.1039/c3bm60250h