Preparation of poly(lactic acid) fiber by dry–jet–wet spinning. II. Effect of process parameters on fiber properties

2006 ◽  
Vol 101 (6) ◽  
pp. 3774-3780 ◽  
Author(s):  
Bhuvanesh Gupta ◽  
Nilesh Revagade ◽  
Nishat Anjum ◽  
Björn Atthoff ◽  
Jöns Hilborn
Keyword(s):  
Lactic Acid ◽  
Process Parameters ◽  
Wet Spinning ◽  
Poly Lactic Acid ◽  
Fiber Properties

Preparation of poly(lactic acid) fiber by dry-jet-wet-spinning. I. Influence of draw ratio on fiber properties

2006 ◽  
Vol 100 (2) ◽  
pp. 1239-1246 ◽  
Author(s):  
Bhuvanesh Gupta ◽  
Nilesh Revagade ◽  
Nishat Anjum ◽  
Björn Atthoff ◽  
Jöns Hilborn
Keyword(s):  
Lactic Acid ◽  
Draw Ratio ◽  
Wet Spinning ◽  
Poly Lactic Acid ◽  
Fiber Properties

The effect of surface modifications on sisal fiber properties and sisal/poly (lactic acid) interface adhesion

2015 ◽  
Vol 73 ◽  
pp. 132-138 ◽  
Author(s):  
A. Orue ◽  
A. Jauregi ◽  
C. Peña-Rodriguez ◽  
J. Labidi ◽  
A. Eceiza ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Surface Modifications ◽  
Sisal Fiber ◽  
Poly Lactic Acid ◽  
Interface Adhesion ◽  
Fiber Properties ◽  
Effect Of Surface

scholarly journals Spinnability and characteristics of polyoxymethylene-based core–sheath bicomponent fibers

2019 ◽  
Vol 14 ◽  
pp. 155892501985944
Author(s):  
Jitlada Boonlertsamut ◽  
Supaphorn Thumsorn ◽  
Toshikazu Umemura ◽  
Hiroyuki Hamada ◽  
Atsushi Sakuma
Keyword(s):  
Lactic Acid ◽  
Structural Characteristics ◽  
Core Material ◽  
Poly Lactic Acid ◽  
Bicomponent Fibers ◽  
Fiber Properties ◽  
The Core ◽  
The Impact ◽  
Fiber Processing ◽  
Selection Of

In this work, the spinning abilities of polyoxymethylene-based core–sheath bicomponent fibers were investigated. Bicomponent fibers were prepared using polyoxymethylene as the core material and poly(lactic acid) blended with polyoxymethylene or pure polyoxymethylene as sheath materials, and their characteristics were investigated and compared. Fiber properties such as elongation are important because they directly relate to the spinning performance during fiber processing. This work reports the impact of the composition designation of the core–sheath bicomponent fibers on the controllable stability of poly(lactic acid) in polyoxymethylene–poly(lactic acid) blends in the fibers, as well as the influence of the core–sheath material on the structure, fiber diameter and distribution, thermal stability, and mechanical properties of the core–sheath bicomponent fibers. It was found that the selection of core and sheath materials affected the structural characteristics of the fibers. The polyoxymethylene core–polyoxymethylene sheath (FV) fiber showed dimensional stability. However, the polyoxymethylene core–poly(lactic acid)/polyoxymethylene sheath (FT30) fiber provided the optimum limit of poly(lactic acid) content for controlling the stable properties of the core–sheath bicomponent fibers.

Modeling and predicting the tensile strength of poly (lactic acid)/graphene nanocomposites by using support vector regression

2016 ◽  
Vol 30 (10) ◽  
pp. 1650052
Author(s):  
W. D. Cheng ◽  
C. Z. Cai ◽  
Y. Luo ◽  
Y. H. Li ◽  
C. J. Zhao
Keyword(s):  
Tensile Strength ◽  
Lactic Acid ◽  
Support Vector Regression ◽  
Process Parameters ◽  
Poly Lactic Acid ◽  
Percentage Error ◽  
Support Vector ◽  
Graphene Nanocomposites ◽  
Absolute Percentage Error ◽  
Rsm Model

According to an experimental dataset under different process parameters, support vector regression (SVR) combined with particle swarm optimization (PSO) for its parameter optimization was employed to establish a mathematical model for prediction of the tensile strength of poly (lactic acid) (PLA)/graphene nanocomposites. Four variables, while graphene loading, temperature, time and speed, were employed as input variables, while tensile strength acted as output variable. Using leave-one-out cross validation test of 30 samples, the maximum absolute percentage error does not exceed 1.5%, the mean absolute percentage error (MAPE) is only 0.295% and the correlation coefficient [Formula: see text] is as high as 0.99. Compared with the results of response surface methodology (RSM) model, it is shown that the estimated errors by SVR are smaller than those achieved by RSM. It revealed that the generalization ability of SVR is superior to that of RSM model. Meanwhile, multifactor analysis is adopted for investigation on significances of each experimental factor and their influences on the tensile strength of PLA/graphene nanocomposites. This study suggests that the SVR model can provide important theoretical and practical guide to design the experiment, and control the intensity of the tensile strength of PLA/graphene nanocomposites via rational process parameters.

Evaluating the deposition quality of parts produced by an open-source 3D printer

2017 ◽  
Vol 23 (4) ◽  
pp. 796-803 ◽  
Author(s):  
Leonardo Santana ◽  
Carlos Henrique Ahrens ◽  
Aurélio da Costa Sabino Netto ◽  
Cassiano Bonin
Keyword(s):  
Lactic Acid ◽  
Process Parameters ◽  
Poly Lactic Acid ◽  
Processing Conditions ◽  
Mass Measurements ◽  
Content Type ◽  
Factors Affecting ◽  
Flexural Tests ◽  
Feedstock Material

Purpose The purpose of this study is to analyze the factors affecting the deposition of parts manufactured in poly(lactic acid) with variations in print speed and extrusion temperature. Specimens were analyzed through optical microscopy, mass measurements and flexural tests. The extruder-head evaluation consisted of monitoring the feedstock material displacement on entering the system during deposition under different processing conditions. Design/methodology/approach To analyze the factors affecting the deposition, parts were manufactured in poly(lactic acid) with variations in print speed and extrusion temperature. Specimens were analyzed through optical microscopy, mass measurements and flexural tests. The extruder-head evaluation consisted of monitoring the feedstock material displacement on entering the system during deposition under different processing conditions. Findings The results showed low repeatability in the manufacturing of parts, as significant variations in the evaluated responses were found for specimens built under the same process parameters. The main cause for this effect was deposition failure, owing to filament slippage in the extruder head hobbed pulley. Practical implications The results found should alert users to the fact that performance tests need to be carried out on every subcomponent of the equipment before conducting experiments on printing parameters. The components of the equipment can influence the final quality of the parts obtained as much as the building parameters and this influence can be significant enough to overlap with that of the process parameters. Originality/value The effect of slippage on the deposition quality was quantified and the command loss in the machine control board was identified.

scholarly journals Innovative Bio-based Poly(Lactic Acid)/Poly(Alkylene Furanoate)s Fiber Blends for Sustainable Textile Applications

2021 ◽  
Author(s):  
Davide Perin ◽  
Daniele Rigotti ◽  
Giulia Fredi ◽  
George Z. Papageorgiou ◽  
Dimitrios N. Bikiaris ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Lactic Acid ◽  
Cross Section ◽  
Wet Spinning ◽  
Poly Lactic Acid ◽  
Future Research ◽  
Drawing Process ◽  
Microstructural Investigation ◽  
First Time ◽  
Thermal Stability Of

AbstractThis work aims at producing and investigating, for the first time, the microstructural and thermo-mechanical properties of fibers constituted by poly(lactic acid) (PLA)/poly(alkylene furanoate)s (PAFs) blends for textile applications. Two different PAFs have been investigated, i.e., poly(octylene furanoate) (P8F) and poly(dodecylene furanoate) (P12F), which have been blended with PLA in different concentrations and spun through a lab-made wet spinning device. The microstructural investigation of the fiber cross-section evidenced domains of PAFs homogeneously dispersed within the PLA matrix. The immiscibility of the produced blends was also suggested by the fact that the glass transition temperature of PLA was unaffected by the presence of PAF. The thermal stability of PLA was not substantially influenced by the PAF content, whereas the water absorption tendency decreased with an increase in P12F fraction. The mechanical properties of PLA/P8F blends decreased with the P8F amount, while for PLA/P12F fiber blends the stiffness and the strength were approximatively constant by increasing the P12F content. The drawing process, performed at 70 °C and with two different draw ratios, brought an interesting increase in the mechanical properties of PLA fibers upon P12F introduction. These promising results constitute the basis for future research on these innovative bio-based fibers.

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