Preparation of poly(lactic acid)/sintered hydroxyapatite composite biomaterial by supercritical CO2

2017 ◽  
Vol 29 (1) ◽  
pp. 67-79
Author(s):  
Yumin Zhang ◽  
Jianru Wang ◽  
Yanmiao Ma ◽  
Bo Han ◽  
Xiaojun Niu ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Supercritical Co2 ◽  
Poly Lactic Acid ◽  
Hydroxyapatite Composite

Lead ion removal characteristics of poly(lactic acid)/hydroxyapatite composite foams prepared by supercritical CO2 process

2011 ◽  
Vol 32 (9) ◽  
pp. 1408-1415 ◽  
Author(s):  
Byung Jin Jeon ◽  
Young Gyu Jeong ◽  
Byung Gil Min ◽  
Won Seok Lyoo ◽  
Sang Cheol Lee
Keyword(s):  
Lactic Acid ◽  
Supercritical Co2 ◽  
Lead Ion ◽  
Poly Lactic Acid ◽  
Ion Removal ◽  
Composite Foams ◽  
Hydroxyapatite Composite ◽  
Lead Ion Removal

Thermal and Rheological Properties of Poly(lactic acid)/Low-Density Polyethylene Blends and Their Supercritical CO2 Foaming Behavior

2018 ◽  
Vol 26 (9) ◽  
pp. 3564-3573 ◽  
Author(s):  
Hongfu Zhou ◽  
Mingming Zhao ◽  
Zhongjie Qu ◽  
Jianguo Mi ◽  
Xiangdong Wang ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Rheological Properties ◽  
Supercritical Co2 ◽  
Low Density Polyethylene ◽  
Poly Lactic Acid ◽  
Low Density ◽  
Polyethylene Blends ◽  
Foaming Behavior

scholarly journals Effect of nano-hydroxyapatite on protein adsorption and cell adhesion of poly(lactic acid)/nano-hydroxyapatite composite microspheres

2020 ◽  
Vol 2 (4) ◽  
Author(s):  
H. M. C. Suboda Wijerathne ◽  
Dong Yan ◽  
Bin Zeng ◽  
Yanping Xie ◽  
Hongchao Hu ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Cell Adhesion ◽  
Protein Adsorption ◽  
Poly Lactic Acid ◽  
Composite Microspheres ◽  
Hydroxyapatite Composite

Electrospinning of chitosan/poly(lactic acid-co-glycolic acid)/hydroxyapatite composite nanofibrous mats for tissue engineering applications

2014 ◽  
Vol 71 (11) ◽  
pp. 2999-3016 ◽  
Author(s):  
Tugba Endogan Tanir ◽  
Vasif Hasirci ◽  
Nesrin Hasirci
Keyword(s):  
Tissue Engineering ◽  
Lactic Acid ◽  
Glycolic Acid ◽  
Poly Lactic Acid ◽  
Engineering Applications ◽  
Hydroxyapatite Composite

scholarly journals The Study of Chemical, Mechanical, Thermal, and Morphological Properties of Poly Lactic Acid-nano Hydroxyapatite Composite Scaffold

2018 ◽  
Vol 23 (1) ◽  
pp. 1-11
Author(s):  
Md Foisal ◽  
Ajoy Kumer ◽  
Umma Nasrin ◽  
Mohammad Ismail ◽  
Mohammad Alam
Keyword(s):  
Lactic Acid ◽  
Composite Scaffold ◽  
Morphological Properties ◽  
Poly Lactic Acid ◽  
Hydroxyapatite Composite

scholarly journals Preparation and In Vitro Behavior of a Poly(lactic acid)-Fiber/Hydroxyapatite Composite Sheet

2009 ◽  
Vol 2009 ◽  
pp. 1-4 ◽  
Author(s):  
Yasuhiro Tanimoto ◽  
Norihiro Nishiyama
Keyword(s):  
Lactic Acid ◽  
Type I Collagen ◽  
Poly Lactic Acid ◽  
Apatite Formation ◽  
Type I ◽  
Composite Sheet ◽  
Precipitate Formation ◽  
Hydroxyapatite Composite ◽  
Fiber Sheet

This paper describes the processing and in vitro behavior of a poly(lactic acid) (PLA)-fiber/hydroxyapatite (HA) composite sheet consisting of a knitted PLA-fiber sheet and HA powder for bone tissue engineering. Type I collagen was used as a binding agent to combine the PLA fibers and the HA powder. Precipitate formation in Hanks' balanced salt (HBS) solution was monitored to evaluate the in vitro apatite formation ability of the PLA-fiber/HA composite sheet. Precipitate formation was observed on the surface of the PLA-fiber/HA composite sheet after immersion in HBS solution for only 1 day, while no precipitate formation was observed on the PLA-fiber sheet without HA as a control. In conclusion, a PLA-fiber/HA composite sheet for use as a scaffold was successfully prepared. Within the limitations of this investigation, we confirmed that the PLA-fiber/HA composite sheet has a high apatite formation activity compared with the PLA-fiber sheet and represents a promising material for use as a scaffold.

Influence of polydispersity of poly(lactic acid) on particle formation by rapid expansion of supercritical CO2 solutions

2010 ◽  
Vol 51 (3) ◽  
pp. 376-383 ◽  
Author(s):  
Muhammad Imran ul-haq ◽  
Alberto Acosta-Ramírez ◽  
Parisa Mehrkhodavandi ◽  
Ruth Signorell
Keyword(s):  
Lactic Acid ◽  
Supercritical Co2 ◽  
Particle Formation ◽  
Rapid Expansion ◽  
Poly Lactic Acid

Compounding and Melt Strengthening of Poly(Lactic Acid): Shear and Elongation Rheological Investigations for Forming Process

2013 ◽  
Vol 554-557 ◽  
pp. 1751-1756 ◽  
Author(s):  
Benoit Mallet ◽  
Khalid Lamnawar ◽  
Abderrahim Maazouz
Keyword(s):  
Mechanical Properties ◽  
Lactic Acid ◽  
Supercritical Co2 ◽  
Food Packaging ◽  
Blow Up ◽  
Good Alternative ◽  
Chain Extension ◽  
Poly Lactic Acid ◽  
Forming Process ◽  
Batch Foaming

The poly (lactic acid) (PLA), through its organic origin and its biodegradation properties, can be a good alternative to petroleum-based polymers. To this end, the forming process as well blown extrusion and foaming of PLA was investigated in this study as an alternative for the production of food packaging. Through this work, we present some promising routes to enhance its processing ability which presents several challenges mainly due to the poor shear and elongation properties of this biopolymer. To our knowledge, there is no paper dedicated to the investigation of foaming and/or blown extrusion of PLA that involves structural, rheological and thermo-mechanical properties. To achieve this objective, various formulations of PLA with multifunctionalized epoxy, nucleants and plasticizer were prepared and characterized on the basis of their linear viscoelasticity and extensional properties. The balance of chain extension and branching has been also investigated using solution viscosimetry, Steric exclusion chromatography (SEC) and rheology (relaxation spectrum, Van Gurp Palmen curves….). We pushed further by characterizing both the structure and thermo-mechanical properties of PLA formulations. On one hand, a batch foaming assisted with supercritical CO2 was achieved following a full characterization in physicochemical, rheological and thermal domain, The influence of the foaming parameters, the extent of chain modification as well as the contribution of crystallization on cell morphology was evaluated. Based on these parameters, structures ranging from micro to macro-cellular-cell were obtained. On the other hand, the stability maps of blown processing for neat and modified PLA were established at different die temperatures. We have achieved a great enhancement of the blown processing windows of PLA with high BUR (Blow Up Ratio) and TUR (Take Up Ratio) attained. We were able to demonstrate that a higher kinetic of crystallization can also be reached for chain-extended and branched PLA formulated with adequate amounts of nucleants and plasticizers. Induced crystallization during process was also demonstrated. Through this work, blown films with interesting thermo-mechanical and mechanical properties have been produced using an optimal formulation for PLA. References [1] A. Maazouz, K. Lamnawar, B. Mallet, Patent: C08L67/00; C08J5/10. FR2941702 (A1). (2010) [2] Y.-M. Corre, A. Maazouz, J. Duchet, J. Reignier, Batch foaming of chain extended PLA with supercritical CO2: Influence of the rheological properties and the process parameters on the cellular structure. J. of Supercritical Fluids,58 (2011) 177-188 [3] B. Mallet, K. Lamnawar, A. Maazouz, Compounding and processing of biodegradable materials based on PLA for packaging applications: In greening the 21st century material’s world, Frontiers in Science and Engineering, 1-2(2011) 1-44 [4] B. Mallet, K. Lamnawar, A. Maazouz, Improvement of blown extrusion processing of PLA: structure-processing-properties relashionships. Polymer engineering and Science (To appear in 2013).

Properties of poly(lactic acid)/hydroxyapatite composite through the use of epoxy functional compatibilizers for biomedical application

2017 ◽  
Vol 32 (2) ◽  
pp. 175-190 ◽  
Author(s):  
Naruporn Monmaturapoj ◽  
Autcharaporn Srion ◽  
Prasert Chalermkarnon ◽  
Suthawan Buchatip ◽  
Atitsa Petchsuk ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Biomedical Application ◽  
Poly Lactic Acid ◽  
Hydroxyapatite Composite
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