scholarly journals Structure and blood compatibility of highly oriented poly(lactic acid)/thermoplastic polyurethane blends produced by solid hot stretching

2013 ◽  
Vol 24 (9) ◽  
pp. 853-860 ◽  
Author(s):  
Xiaowen Zhao ◽  
Lin Ye ◽  
Phil Coates ◽  
Fin Caton-Rose ◽  
Michasel Martyn
Keyword(s):  
Lactic Acid ◽  
Blood Compatibility ◽  
Thermoplastic Polyurethane ◽  
Poly Lactic Acid

Biodegradable Microfluidic Device: Hydrolysis, Decomposition and Surface Modification

2010 ◽  
Vol 447-448 ◽  
pp. 755-759 ◽  
Author(s):  
Jia En Low ◽  
Wei Xiang Koh ◽  
Joon Kit Lai ◽  
Yan Jie Lee ◽  
Xu Li ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Microfluidic Device ◽  
Ph Value ◽  
Blood Compatibility ◽  
Blood Clot ◽  
Hydrophobic Surface ◽  
Poly Lactic Acid ◽  
Water Contact ◽  
Chemical Grafting ◽  
Poly Ethylene

Poly(lactic acid) (PLA) is a biodegradable and biocompatible aliphatic polyester whose lactic acid monomers are derived from renewable resources such as corn and sugar beet. As a thermal plastic it can be processed through compounding and injection. As such, we have developed a microfludic device using PLA aimed at blood dialysis application. To quantify the degradation of PLA, its hydrolysis at different pH value was studied. To study the bioresorbable property of these fabricated devices, its decomposition was tested by morphology observation and weight change measurements after embedding in soil under simulated environmental conditions. Upon contact with a hydrophobic surface, platelets and prothrombin are always activated to attach to the surface, resulting in blood clot. This would block the blood flow through the dialysis channels in the microfluidic device. To improve the hydrophilicity, hence the blood compatibility, chemical grafting of a hydrophilic polymer, poly(ethylene oxide) methacrylate (PEGmA), onto the surface of PLA microfluidic device was carried out and the changes in hydrophilicity was monitored through measuring the water contact angle. Our results indicate that chemical grafting of PEGmA significantly improves the hydrophilicity of the device surface.

Composites of poly(lactic) acid/thermoplastic polyurethane/mica with compatibilizer: morphology, miscibility and interphase

RSC Advances ◽  
2015 ◽  
Vol 5 (120) ◽  
pp. 98915-98924 ◽  
Author(s):  
Shikui Jia ◽  
Zhong Wang ◽  
Yan Zhu ◽  
LiGui Chen ◽  
Lei Fu
Keyword(s):  
Mechanical Properties ◽  
Lactic Acid ◽  
Thermoplastic Polyurethane ◽  
Poly Lactic Acid

Relationship between mechanical properties and morphology of poly(lactic) acid (PLA)/thermoplastic polyurethane (TPU)/mica composites.

Effects of thermoplastic polyurethane on the properties of poly(lactic acid)/organo-montmorillonite nanocomposites based on novel vane extruder

2013 ◽  
Vol 54 (10) ◽  
pp. 2292-2300 ◽  
Author(s):  
Shikui Jia ◽  
Jinping Qu ◽  
Rongyuan Chen ◽  
Chengran Wu ◽  
Zan Huang ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Thermoplastic Polyurethane ◽  
Poly Lactic Acid ◽  
Montmorillonite Nanocomposites

Preparation and blood compatibility of electrospun nanofibrous CTS/PLA mats from chitosan nanopowders and poly(lactic acid)

2017 ◽  
Vol 39 ◽  
pp. E416-E425 ◽  
Author(s):  
Wenyuan Dong ◽  
Qinhuan Zeng ◽  
Xueqiong Yin ◽  
Haifang Liu ◽  
Ju Lv ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Blood Compatibility ◽  
Poly Lactic Acid

Effect of Thermoplastic Polyurethane-Modified Silica on Melt-Blended Poly(Lactic Acid) (PLA) Nanocomposites

2017 ◽  
Vol 25 (8) ◽  
pp. 583-592 ◽  
Author(s):  
Sun-Mou Lai ◽  
Pei-Wen Li
Keyword(s):  
Lactic Acid ◽  
Thermoplastic Polyurethane ◽  
Optical Transmittance ◽  
Poly Lactic Acid ◽  
Modified Silica ◽  
Moulding Process ◽  
Fast Processing ◽  
Unmodified Silica ◽  
Silica Dispersion ◽  
Surface Modified

3-aminopropyltriethoxysilane (APTES) was used as a coupling agent to graft thermoplastic polyurethane (TPU) onto a nanosilica surface. The modification of TPU on the surface of silica nanoparticles was confirmed by FTIR, NMR, ESCA and TGA assessment. The grafting degree of TPU onto the silica was about 7.3%. The incorporation of surface-modified silica (TAS50) into poly(lactic acid) (PLA) induced the nucleation of PLA, giving a higher crystallisation peak temperature, which would be advantageous for fast processing cycles in the commercial moulding process. With pristine silica incorporated into PLA, the variation in the cold crystallisation and melting temperatures was limited. However, for the surface-modified silica filled PLA, a lower cold crystallisation temperature at 112.1 °C and a shift of melting temperature from Tm1 to Tm2 at 167.7 °C were observed. The cooling rate also played an essential role in the derived crystalline forms. The tensile strength of the composite containing modified silica was slightly higher than that with the pristine silica, even though both showed similar degrees of silica dispersion from the morphology observation. For the surface-modified silica composite, the optical transmittance was higher than that of unmodified silica case. This finding implies the significance of the surface modification.

scholarly journals Influence of clay-nanofiller geometry on the structure and properties of poly(lactic acid)/thermoplastic polyurethane nanocomposites

RSC Advances ◽  
2016 ◽  
Vol 6 (36) ◽  
pp. 30755-30762 ◽  
Author(s):  
I. Kelnar ◽  
J. Kratochvíl ◽  
I. Fortelný ◽  
L. Kaprálková ◽  
A. Zhigunov ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Thermoplastic Polyurethane ◽  
Polymer System ◽  
Poly Lactic Acid ◽  
Structure And Properties ◽  
Complex Effect ◽  
Polyurethane Nanocomposites

The complex effect of platy and tubular nanofillers on the performance of a biodegradable multiphase polymer system is presented.

Compatibility improvement of poly(lactic acid)/thermoplastic polyurethane blends with 3-aminopropyl triethoxysilane

2015 ◽  
Vol 132 (30) ◽  
pp. n/a-n/a ◽  
Author(s):  
Sun-Mou Lai ◽  
Yu-Chi Lan ◽  
Wan-Ling Wu ◽  
Yu-Jhen Wang
Keyword(s):  
Lactic Acid ◽  
Thermoplastic Polyurethane ◽  
Poly Lactic Acid

Blood compatibility evaluations of poly(ethylene glycol)–poly(lactic acid) copolymers

2016 ◽  
Vol 30 (10) ◽  
pp. 1485-1493 ◽  
Author(s):  
Chenghua Li ◽  
Chengyan Ma ◽  
Yi Zhang ◽  
Zonghua Liu ◽  
Wei Xue
Keyword(s):  
Lactic Acid ◽  
Ethylene Glycol ◽  
Blood Compatibility ◽  
Poly Lactic Acid ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene
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