Super-Tough Poly(lactic Acid)-Based Thermoplastic Vulcanizate Based on Selective Dispersion and In Situ Compatibilization of Commercial Reinforcing Fillers and Its Application in Three-Dimensional Printing

2021 ◽  
Author(s):  
Zhou Gong ◽  
Jiarong Huang ◽  
Jianfeng Fan ◽  
Xiaoqing Chen ◽  
Hui Wang ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Three Dimensional ◽  
Poly Lactic Acid ◽  
Three Dimensional Printing ◽  
Thermoplastic Vulcanizate ◽  
Reinforcing Fillers ◽  
In Situ Compatibilization ◽  
Dimensional Printing

scholarly journals Improving adhesion of three-dimensional printed objects on textile fabrics by polymer coating

2019 ◽  
Vol 14 ◽  
pp. 155892501989525 ◽  
Author(s):  
Pia Meyer ◽  
Christoph Döpke ◽  
Andrea Ehrmann
Keyword(s):  
Mechanical Properties ◽  
Lactic Acid ◽  
Polymer Coating ◽  
Three Dimensional ◽  
Poly Lactic Acid ◽  
Three Dimensional Printing ◽  
Textile Fabrics ◽  
Production Technologies ◽  
Dimensional Printing ◽  
Textile Fabric

Three-dimensional printing belongs to the emerging technologies of our time. Still being relatively time-consuming and suffering from low mechanical properties, three-dimensional printing can be combined with other production technologies to overcome these problems. Three-dimensional printing on textile fabrics, for example, allows for creating large areas with sufficient lateral mechanical properties in a reasonable time on which three-dimensional printed parts give additional functionalities or laterally selective mechanical rigidity and so on. To create three-dimensional printed personalized knee joint support bandages, however, the adhesion between textile fabric and polymeric parts needs to be further increased. Here, we report on the influence of a polymer coating on different textile fabrics on the adhesion of three-dimensional printed elements from hard and soft poly(lactic acid). Surprisingly, the coating increases the adhesion significantly for the hard poly(lactic acid), while the soft poly(lactic acid) sticks better on some materials without additional coating. Maximum separation forces are measured for linen which can be attributed to the relatively long linen fibers with uneven surface, increasing the fiber–fiber friction inside the fabric and the adhesion to the polymer.

Development of three-dimensional printing filaments based on poly(lactic acid)/hydroxyapatite composites with potential for tissue engineering

2021 ◽  
pp. 002199832098856
Author(s):  
Marcela Piassi Bernardo ◽  
Bruna Cristina Rodrigues da Silva ◽  
Luiz Henrique Capparelli Mattoso
Keyword(s):  
Tissue Engineering ◽  
Lactic Acid ◽  
Fused Deposition Modeling ◽  
Three Dimensional ◽  
Poly Lactic Acid ◽  
Scanning Calorimetry ◽  
Three Dimensional Printing ◽  
Fused Deposition ◽  
Deposition Modeling ◽  
3D Printed

Injured bone tissues can be healed with scaffolds, which could be manufactured using the fused deposition modeling (FDM) strategy. Poly(lactic acid) (PLA) is one of the most biocompatible polymers suitable for FDM, while hydroxyapatite (HA) could improve the bioactivity of scaffold due to its chemical composition. Therefore, the combination of PLA/HA can create composite filaments adequate for FDM and with high osteoconductive and osteointegration potentials. In this work, we proposed a different approache to improve the potential bioactivity of 3D printed scaffolds for bone tissue engineering by increasing the HA loading (20-30%) in the PLA composite filaments. Two routes were investigated regarding the use of solvents in the filament production. To assess the suitability of the FDM-3D printing process, and the influence of the HA content on the polymer matrix, thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and scanning electron microscopy (SEM) were performed. The HA phase content of the composite filaments agreed with the initial composite proportions. The wettability of the 3D printed scaffolds was also increased. It was shown a greener route for obtaining composite filaments that generate scaffolds with properties similar to those obtained by the solvent casting, with high HA content and great potential to be used as a bone graft.

scholarly journals Development of an arthroscopically compatible polymer additive layer manufacture technique

2017 ◽  
Vol 231 (6) ◽  
pp. 586-594
Author(s):  
Simon W Partridge ◽  
Matthew J Benning ◽  
Matthew J German ◽  
Kenneth W Dalgarno
Keyword(s):  
Three Dimensional ◽  
Proof Of Concept ◽  
Polymer Additive ◽  
Three Dimensional Printing ◽  
Functionally Gradient ◽  
Wide Range ◽  
Layer Manufacture ◽  
Dimensional Printing

This article describes a proof of concept study designed to evaluate the potential of an in vivo three-dimensional printing route to support minimally invasive repair of the musculoskeletal system. The study uses a photocurable material to additively manufacture in situ a model implant and demonstrates that this can be achieved effectively within a clinically relevant timescale. The approach has the potential to be applied with a wide range of light-curable materials and with development could be applied to create functionally gradient structures in vivo.

3D-printed photo-spectroelectrochemical devices forin situandin operandoX-ray absorption spectroscopy investigation

2016 ◽  
Vol 23 (2) ◽  
pp. 622-628 ◽  
Author(s):  
Elisabetta Achilli ◽  
Alessandro Minguzzi ◽  
Alberto Visibile ◽  
Cristina Locatelli ◽  
Alberto Vertova ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Three Dimensional ◽  
Three Dimensional Printing ◽  
3D Printed ◽  
Electrochemical Devices ◽  
Complementary Techniques ◽  
X Ray Absorption ◽  
Dimensional Printing

Three-dimensional printed multi-purpose electrochemical devices for X-ray absorption spectroscopy are presented in this paper. The aim of this work is to show how three-dimensional printing can be a strategy for the creation of electrochemical cells forin situandin operandoexperiments by means of synchrotron radiation. As a case study, the description of two cells which have been employed in experiments on photoanodes for photoelectrochemical water splitting are presented. The main advantages of these electrochemical devices are associated with their compactness and with the precision of the three-dimensional printing systems which allows details to be obtained that would otherwise be difficult. Thanks to these systems it was possible to combine synchrotron-based methods with complementary techniques in order to study the mechanism of the photoelectrocatalytic process.

In situ three-dimensional printing for reparative and regenerative therapy

2019 ◽  
Vol 21 (2) ◽  
Author(s):  
Nureddin Ashammakhi ◽  
Samad Ahadian ◽  
Ippokratis Pountos ◽  
Shu-Kai Hu ◽  
Nazzar Tellisi ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Regenerative Therapy ◽  
Three Dimensional Printing ◽  
Dimensional Printing
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