Terephthalate Glycol Research Articles

Enabling Scalable Polymer Electrolyte with Synergetic Ion Conductive Channels via a Two Stage Rheology Tuning UV Polymerization Strategy.

Lithium metal batteries with polyethylene oxide (PEO) electrolytes are considered as one of the ideal candidates for next generation power sources. However, the low ambient operation capability and conventional solvent-based fabrication process of PEO limit their large-scale application. In this work, a comb-like quasi-solid polymer electrolyte (QPE) reinforced with polyethylene glycol terephthalate nonwoven is fabricated. Combining the density functional theory calculation analysis and polymer structure design, optimized and synergized ion conductive channels are established by copolymerization of tetrahydrofurfuryl acrylate and introduction of plasticizer tetramethyl urea. Additionally, a unique two-stage solventless UV polymerization strategy is utilized for rheology tuning and electrolyte fabrication. Compared with the conventional one-step UV process, this strategy is ideally suited for the roll-to-roll continuous coating fabrication process with environmental friendliness. The fabricated QPE exhibits high ionic conductivity of 0.40 mS cm-1 and Li+ transference number (t= 0.77) at room temperature. LiFePO4 //Li batteries are assembled to evaluate battery performance, which deliver excellent discharge capacity (144.9 mAh g-1 at 0.5 C) and cycling stability (with the retention rate 94.5% at 0.5 C after 200 cycles) at room temperature. The results demonstrate that it has high potential for solid-state lithium metal batteries.

Bio-inspired soft actuator with contact feedback based on photothermal effect and triboelectric nanogenerator

The development of film soft actuators with contact feedback and outstanding environmental robustness is desirable. In this work, a film-based soft actuator laminated by polyethylene glycol terephthalate (PET), carbon black ink, and polydimethylsiloxane (PDMS) is proposed. Due to the enormous difference in thermal expansion coefficients between these materials, the actuator achieves a large bending deformation angle and a high response speed. Without the shape-memory materials, the actuator can return to its original shape under light-induced after being subjected to mechanical stress. Meanwhile, the actuator maintains its shape after being exposed to extreme temperatures of up to 200 °C and immersion in a variety of solvents. Furthermore, based on the triboelectric effect, the actuator can generate remarkable real-time electrical signals when it mimics the tongue of frogs, bends deformation, and simulates mechanical grippers. This work demonstrates a simple method for building various intelligent and flexible electronic devices and provides promising applications for soft robots.

3D printed anthropomorphic left ventricular myocardial phantom for nuclear medicine imaging applications

BackgroundAnthropomorphic torso phantoms, including a cardiac insert, are frequently used to investigate the imaging performance of SPECT and PET systems. These phantom solutions are generally featuring a simple anatomical representation of the heart. 3D printing technology paves the way to create cardiac phantoms with more complex volume definition. This study aimed to describe how a fillable left ventricular myocardium (LVm) phantom can be manufactured using geometry extracted from a patient image.MethodsThe LVm of a healthy subject was segmented from 18F-FDG attenuation corrected PET image set. Two types of phantoms were created and 3D printed using polyethylene terephthalate glycol (PETG) material: one representing the original healthy LVm, and the other mimicking myocardium with a perfusion defect. The accuracy of the LVm phantom production was investigated by high-resolution CT scanning of 3 identical replicas. 99mTc SPECT acquisitions using local cardiac protocol were performed, without additional scattering media (“in air” measurements) for both phantom types. Furthermore, the healthy LVm phantom was inserted in the commercially available DataSpectrum Anthropomorphic Torso Phantom (“in torso” measurement) and measured with hot background and hot liver insert.ResultsPhantoms were easy to fill without any air-bubbles or leakage, were found to be reproducible and fully compatible with the torso phantom. Seventeen segments polar map analysis of the "in air” measurements revealed that a significant deficit in the distribution appeared where it was expected. 59% of polar map segments had less than 5% deviation for the "in torso” and "in air” measurement comparison. Excluding the deficit area, neither comparison had more than a 12.4% deviation. All the three polar maps showed similar apex and apical region values for all configurations.ConclusionsFillable anthropomorphic 3D printed phantom of LVm can be produced with high precision and reproducibility. The 3D printed LVm phantoms were found to be suitable for SPECT image quality tests during different imaging scenarios. The flexibility of the 3D printing process presented in this study provides scalable and anthropomorphic image quality phantoms in nuclear cardiology imaging.

INVESTIGATION OF THE EFFECT OF TAPER ANGLE AND BOUNDARY CONDITION ON NATURAL FREQUENCY OF THE 3D PRINTED PET-G BEAMS

Today, fused deposition modeling (EMM), which is one of the additive manufacturing methods, can transform the highlighted ideas into three-dimensional products after their designs. For this reason, it is frequently preferred in many platforms, from applications in aerospace and aviation to the construction of houses in the construction industry and the production of parts as a hobby. In this study, the influence of the taper angle (ϴ=0, ϴ=0.25 ve ϴ=0.50) and boundary conditions (narrow or wide side is fixed) on the natural frequency values of the tapered Polyethylene terephthalate glycol (PET-G) beams that are manufactured with fused deposition modeling (FDM) was determined by both experimental and Ansys APDL finite element analysis program and compared between each other. In addition, in order to experimentally determine the elasticity modulus values that should be assigned as material data in the finite element analysis program, tensile test samples were produced with the same FDM parameters, in accordance with the ASTM D638 standard, and the relevant samples were subjected to the tensile test. In addition to these, hardness and surface roughness measurements were also carried out from the produced samples. As a result, it has been determined that the natural frequency values increase with the increase of the taper angle from 0.25 to 0.50 in the tapered beams produced by FDM and when the fixing is applied from the wide edge compared to the narrow edge. The finite element analysis results and the experimental results are in good agreement.

Effect of Process Parameters on Different Properties of 3D Printed PETG Parts Prepared Using FDM

This study has been undertaken to give a review of polyethylene terephthalate glycol (PETG) material used in fused deposition modelling (FDM). It offers a review of the existing literature on PETG material. The objective of the paper is to providing guidance on different process parameters that can be used to improve strength of the part by performing various testing like tensile, compressive, flexural etc. This research targets to find new paths that can be used for further development of use of fiber reinforcement in PETG material.

Studying the Effect of Short Carbon Fiber on Fused Filament Fabrication Parts Roughness via Machine Learning.

Along with the characteristic staircase effect, short carbon fibers, added to reinforce Fused Filament Fabrication parts, can significantly worsen the resulting surface finishing. Concerning this topic, the present work intends to improve the existing knowledge by analyzing 2400 measurements of arithmetic mean roughness Ra corresponding to different combinations of six process parameters: the content by weight of short carbon fibers in polyethylene terephthalate glycol (PETG) filaments f, layer height h, surface build angle θ, number of walls w, printing speed s, and extruder diameter d. The collected measurements were represented by dispersion and main effect plots. These representations indicate that the most critical parameters are θ, f, and h. Besides, up to a carbon fiber content of 12%, roughness is mainly affected by the staircase effect. Hence, it would be likely to obtain reinforced parts with similar roughness to unreinforced ones. Different machine learning methods were also tested to extract more information. The prediction model of Ra using the Random Forest algorithm showed a correlation coefficient equal to 0.94 and a mean absolute error equal to 2.026 μm. In contrast, the J48 algorithm identified a combination of parameters (h = 0.1 mm, d = 0.6 mm, and s = 30 mm/s) that, independent of the build angle, provides a Ra < 25 μm when using a 20% carbon fiber PETG filament. An example part was printed and measured to check the models. As a result, the J48 algorithm correctly classified surfaces with low roughness (Ra < 25 μm), and the Random Forest algorithm predicted the Ra value with an average relative error of less than 8%.

Modeling and optimization of flexural properties of FDM-processed PET-G specimens using RSM and GWO algorithm

As in every manufacturing process, fused deposition modeling (FDM) is strongly related to its operational parameters. 3D-printed components are anisotropic and brittle and this imposes the need to investigate the effect of FDM-related parameters to improve functionality and strength. In this paper the flexural strength of polyethylene terephthalate glycol (PET-G) is studied by testing different levels for five important process-related parameters; the height of each layer, density of infill, angle of deposited material, printing speed and printing temperature. A response surface experiment with 27 runs was conducted to obtain results for flexural strength (MPa) and proceed with the examination of the effect of each parameter on the response using statistical analysis. The experiments were performed according to ASTM D790 standard. Experimental observations dealing with fructure mechanics and failure modes were recorded and analysed. Based on the analysis of variance (ANOVA) a full quadratic regression equation was generated and verified for its efficiency. Finally the model was implemented as an objective function for a modern population-based algorithm known as grey wolf algorithm (GWO). It was shown that the algorithm can suggest good combination for parameter settings to maintain good flexural strength with a gain close to 15% compared to the highest value obtained by the series of experiments conducted.

Assessment of controllable shape transformation, potential applications, and tensile shape memory properties of 3D printed PETG

In this research, for the first time, highly controllable self-coiling and tensile shape memory behaviors of the 3D printed (Poly-Ethylene Terephthalate Glycol) PETG thermoplastic structures, as a novel shape memory polymer (SMP), are introduced. The results showed that the maximum printing-induced pre-strain of the PETG is stored in the first printed layer. Manipulating the infill printing direction of the 3D printed PETG strip provides different controllable shape transformation modes, including bending and spiraling. The wall effect experiments indicated that the shape transformation related to the infill pattern weakens by increasing the wall size. Employing a cross printing pattern resulted in the strip's more intense self-spiraling behavior, making the final shape transformation mode less influenced by the wall size. The shape transformation of the planar rectangular surfaces printed with single and cross printing patterns caused a self-tubing shape transformation in half and full tubes, respectively. Mechanical and biomedical potential applications of the PETG 3D printed parts' shape transformation are defined as a self-deployable spiral stent, self-conforming supporting splint, mechanical fastening, and self-locking planarly printed gripper to grab spherical, slippery, and soft objects that are hard to grab. The tensile shape memory test was done on a dog-bone tensile sample printed with a cross pattern to evaluate the effect of the first layer's printing direction, programming temperature, and strain rate on the tensile shape memory performance. Hot programmed samples (Tg+10 °C) exhibited a higher shape fixity and weaker strain recovery than warm programmed samples (Tg). Warm programmed samples showed full strain recovery with a considerable downward self-bending in their recovered shape, but hot programmed samples did not show any curvature. This behavior intensifies by increasing the stretching percentage. Also, changing the first printed layer's direction from the longitudinal to the transverse condition prevented the from self-bending during the recovery process. A twentyfold increase in the deformation speed for the warm programming condition resulted in a doubled gentler undesired self-bending and a 14.3% higher shape recovery.

Fused Filament Fabrication 3D Printing: Quantification of Exposure to Airborne Particles

Fused Filament Fabrication (FFF) has been established as a widely practiced Additive Manufacturing technique, using various thermoplastic filaments. Carbon fibre (CF) additives enhance mechanical properties of the materials. The main operational hazard of the FFF technique explored in the literature is the emission of Ultrafine Particles and Volatile Organic Compounds. Exposure data regarding novel materials and larger scale operations is, however, still lacking. In this work, a thorough exposure assessment measurement campaign is presented for a workplace applying FFF 3D printing in various setups (four different commercial devices, including a modified commercial printer) and applying various materials (polylactic acid, thermoplastic polyurethane, copolyamide, polyethylene terephthalate glycol) and CF-reinforced thermoplastics (thermoplastic polyurethane, polylactic acid, polyamide). Portable exposure assessment instruments are employed, based on an established methodology, to study the airborne particle exposure potential of each process setup. The results revealed a distinct exposure profile for each process, necessitating a different safety approach per setup. Crucially, high potential for exposure is detected in processes with two printers working simultaneously. An updated engineering control scheme is applied to control exposures for the modified commercial printer. The establishment of a flexible safety system is vital for workplaces that apply FFF 3D printing.

Thermo-mechanical properties of 3D printed photocurable shape memory resin for clear aligners

To overcome the limitations of the conventional vacuum thermoforming manufacturing method, direct 3D printing of clear aligners has been developed. The present study investigated the thermo-mechanical and viscoelastic properties of a photocurable resin TC-85, which is a new material for the direct 3D printed clear aligners, comparing to a conventional thermoplastic material polyethylene terephthalate glycol. Dynamic mechanical analysis was performed to analyse the mechanical behaviours of the two materials at 37 °C and 80 °C, respectively. Furthermore, the shape memory property of the two materials was evaluated using a U-shape bending test, and the shape recovery ratio for 60 min at 37 °C was calculated. The results indicate that TC-85 can constantly apply a light force to the teeth when used for the 3D printed clear aligners, owing to its flexibility and viscoelastic properties. In addition, it is expected that the force decay induced by repeated insertion of the clear aligners will be reduced and a constant orthodontic force will be maintained. Furthermore, its geometric stability at high temperatures and the shape memory properties provide advantages for the clinical application.

High reflective polyethylene glycol terephthalate package layer for passive daytime radiative cooling in photovoltaic cells

Passive daytime radiative cooling is a promising new field for solving the energy shortage all over the world. Especially for passive radiant cooling technology on photovoltaic field, the radiant cooling film must also have high transmittance, which undoubtedly puts forward higher requirements. At present, monocrystalline silicon photovoltaic cell are the dominant products in the photovoltaic market. Many passive cooling equipment such as temperature plates, fins, and phase change blocks will increase the weight and the complexity of photovoltaic cell, so radiative cooling thin films are attracting more and more attention due to lightweight and easy replacement. In this paper, it is proposed a composite structure of polyethylene glycol terephthalate (PET) film combined with a high-reflective layer in part of the wave band, which has a maximum transmittance of 0.97 in 0.3–1.1 μm and a maximum reflectance of 0.91 in 1.1–4.0 μm. In addition to the transmittance and reflectivity of the corresponding wavelength, the effects of electrical efficiency and cooling power are also studied. It was found that the photoelectric conversion efficiency increased, meanwhile the cooling power 211.34 W·m−2 can be reached, and the working temperature of the photovoltaic cell can be reduced by 11.65℃ under the maximum temperature 75.80℃ in normal operating conditions. Due to its excellent performance, this proposed structure may have potential practical applications in daytime radiation cooling of photovoltaic cells on sale.

Effects of Fiber Orientation on the Coefficient of Thermal Expansion of Fiber-Filled Polymer Systems in Large Format Polymer Extrusion-Based Additive Manufacturing.

Large format polymer extrusion-based additive manufacturing has been studied recently due to its capacity for high throughput, customizable bead size and geometry, and ability to manufacture large parts. Samples from three fiber-filled amorphous thermoplastic materials 3D printed using a Masterprint 3X machine from Ingersoll Machine Tools were studied, along with their neat counterparts. Characterization techniques included thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and thermo-mechanical analysis (TMA). TGA results showed that the fillers decreased the degradation temperature for most of the materials investigated, with a 30 C decrease for polycarbonate (PC) and a 12 C decrease for polyethylene terephthalate glycol (PETG). For all the materials used, heat capacity increases with increasing temperature. Moreover, results show that a highly conductive filler increases the heat capacity. In contrast, a material with a lower conductivity decreases the heat capacity indicated in the 15.2% and 2.54% increase for acrylonitrile butadiene styrene (ABS) and PC and a 27.68% decrease for PETG. The TMA data show that the printed bead exhibits directional properties consistent with an orthotropic material. Smaller strains and coefficient of thermal expansion (CTE) were measured along the bead direction and across the bead compared to the through bead thickness showing that fillers are predominantly oriented in the bead direction, which is consistent with the literature. CTE values through bead thickness and neat material are similar in magnitude, which corresponds to the CTE of the matrix material. The experimental results serve to characterize the effect of fiber filler on the part thermal strains in three principal directions and two-part locations during the extrusion and bead deposition of large-format polymer extrusion-based additive manufacturing technologies.

Cement-glass composite bricks (CGCB) with interior 3D printed PET-G scaffolding

The construction industry is a key sector behind the climate change. Not only does it produce enormous amounts of greenhouse gases, but also absorbs tons of natural aggregates irreversibly. Therefore, this study proposes an alternative approach to the climate change problem by producing a cement-glass composite brick (CGCB) with a printed internal scaffold from recycled Polyethylene Terephthalate Glycol (PET-G). This novel construction material, which consists of about 75% of waste glass and 10% of recycled PET-G scaffolding, has a great potential for tackling this problem. The filling mixture itself – cement-glass mortar (CGM) – and ready-made bricks with an internal PET-G scaffolding (3Dhon structure) were tested to verify the accuracy of the assumptions. The scope of this study included mechanical and thermal tests to indicate the properties of the newly manufactured material. The analysis of the results showed that the final CGCB with 3D printed PET-G scaffolding has better thermal properties than CGM as thermal diffusivity (8%) and decreased specific heat (10%). Additionally, significantly reduced flexural strength and compressive strength has been observed (about 30% of both factors) with almost 100% larger strain during compression testing.

Effects of Sterilization Methods on Different 3D Printable Materials for Templates of Physician-Modified Aortic Stent Grafts Used in Vascular Surgery-A Preliminary Study.

Three-dimensionally-printed aortic templates are increasingly being used to aid in the modification of stent grafts in the treatment of urgent, complex aortic disorders, often of an emergency nature. The direct contact between the aortic template and the stent graft implies the necessity of complete sterility. Currently, the efficacy of sterilizing aortic templates and the effect of sterilization on the geometry of tubular aortic models are unknown. A complex case of aortic arch dissection was selected to prepare a 3D-printed aortic arch template, which was then manufactured in six popular printing materials: polylactic acid (PLA), nylon, polypropylene (PP), polyethylene terephthalate glycol (PETG), and a rigid and flexible photopolymer resin using fused deposition modeling (FDM) and stereolithography (SLA). The 3D models were contaminated with Geobacillus stearothermophilus broth and Bacillus atrophaeus. The sterilization was performed using three different methods: heat (105 °C and 121 °C), hydrogen peroxide plasma, and ethylene oxide gas. Before and after sterilization, the aortic templates were scanned using computed tomography to detect any changes in their morphology by comparing the dimensions. All sterilization methods were effective in the elimination of microorganisms. Steam sterilization in an autoclave at 121 °C caused significant deformation of the aortic templates made of PLA, PETG, and PP. The other materials had stable geometries, and changes during mesh comparisons were found to be submillimeter. Similarly, plasma, gas, and heat at 105 °C did not change the shapes of aortic templates observed macroscopically and using mesh analysis. All mean geometry differences were smaller than 0.5 mm. All sterilization protocols tested in our study were equally effective in destroying microorganisms; however, differences occurred in the ability to induce 3D object deformation. Sterilization at high temperatures deformed aortic templates composed of PLA, PETG, and PP. This method was suitable for nylon, flexible, and rigid resin-based models. Importantly, plasma and gas sterilization were appropriate for all tested printing materials, including PLA, PETG, PP, nylon, flexible and rigid resins. Moreover, sterilization of all the printed models using our novel protocol for steam autoclaving at 105 °C was also 100% effective, which could represent a significant advantage for health centers, which can therefore use one of the most popular and cheap methods of medical equipment disinfection for the sterilization of 3D models as well.

The Mechanical Properties of 3D-Printed Polylactic Acid/Polyethylene Terephthalate Glycol Multi-Material Structures Manufactured by Material Extrusion.

The mechanical properties of polylactic acid (PLA), polyethylene terephthalate glycol (PETG), and PLA/PETG structures manufactured using the multi-material additive manufacturing (MMAM) method were studied in this work. Material extrusion additive manufacturing was used to print PLA/PETG samples with various PLA and PETG layer numbers. By varying the top and bottom layer numbers of two thermoplastics, the effect of layer number on the mechanical properties of 3D-printed structures was investigated. The chemical and thermal characteristics of PLA and PETG were investigated using Fourier transform infrared spectroscopy and differential scanning calorimetry. Tensile and flexural strength of 3D-printed PLA, PETG, and PLA/PETG samples were determined using tensile and three-point bending tests. The fracture surfaces of the samples were evaluated using optical microscopy. The results indicated that multi-material part containing 13 layers of PLA and 3 layers of PETG exhibited the highest ultimate tensile strength (65.4 MPa) and a good flexural strength (91.4 MPa). MMAM was discovered to be a viable way for producing PLA/PETG materials with great mechanical performance.

A robust and flexible silver nanowire/silica sol/poly(3,4-ethylene dioxythiophene)/poly(styrene sulfonate) transparent conductive film for film heater

A robust, flexible and transparent silver nanowires(AgNWs)/silica sol/poly(3,4-ethylene dioxythiophene)/poly(styrene sulfonate) (PEDOT:PSS) composite film was fabricated for film heater via spray-coating AgNWs ink, silica sol and PEDOT:PSS onto the surface of polyethylene glycol terephthalate substrate in turn. Silica sol nanoparticles are absorbed around the AgNWs to improve the connection between AgNWs by capillary effect, and the PEDOT:PSS covers on the surface of AgNWs/silica sol layer to increase the network conductive paths and protect the AgNWs/silica sol layer. The AgNWs/silica sol/PEDOT:PSS composite film shows a sheet resistance of 12 Ω/sq, a transmittance of 87.5% at 550 nm and a Joule heating temperature of 99 °C at 15 V. The composite film with high mechanical stability, low surface roughness and corrosion resistance is promisingly used in window defrost and deicer system.

Experimental investigation of Al5052‐H32/PETG hybrid clinched joints

AbstractThe mechanical clinching technique with an extensible die is selected to connect the metal‐polymer hybrid structure in this article. Al5052‐H32 is chosen as the metallic material. Polyethylene terephthalate glycol (PETG) was chosen as the polymer material. The connection between Al5052‐H32 and PETG is accomplished under diverse forming forces. To evaluate the joinability of hybrid joints, the dimension parameters of hybrid joints are measured by inspecting the transverse section of clinched joints. To evaluate the reliability of joints, the tensile shear test and the energy absorption calculation are accomplished. Moreover, the effect of various forming forces on the mechanical characteristics and failure mode of the hybrid structure is analyzed. The results showed that the Al5052‐H32 sheet and PETG sheet could be effectively connected. The optimal forming force is 38 kN in this experiment. Under this condition, the maximum tensile shear load and the maximum energy absorption value are 1520.16 N and 4.69 J, respectively.

An Ultraflexible and Transparent Graphene‐Based Wearable Sensor for Biofluid Biomarkers Detection

AbstractAn ultraflexible and transparent graphene‐based field‐effect transistors (GFET) wearable nanosensor is presented for detection of body fluid‐biomarkers. The nanosensor is functionalized with a receptor that can specifically bind with the biomarker, resulting in a detectable change in the carrier concentration of the graphene. After recovery from 100 cycles of deformations (bending at radii 175 µm, folding at 150°, and shrinking at 50%), no visible mechanical damage is observed, and electrical properties of the nanosensor are also highly consistent. L‐cysteine, associated with various diseases, is chosen as the biomarker to demonstrate the detection capability of the sensor. The nanosensor is capable of consistently and reliably detecting L‐cysteine with a limit of detection of 0.022 × 10−6 m in undiluted human sweat and 0.043 × 10−6 m in artificial tears. The sensor is fabricated from the 1 µm transparent polyethylene glycol terephthalate substrate and WO3/Au/WO3 electrode (transparency of 81%), and it can be mounted on the eyeball in tear detection without visual influence. These results demonstrate that the ultraflexible and transparent GFET wearable nanosensor can potentially be helpful in medical detection applications.

Development of Electrochemical 6-Well Plates and Its Stability as an Immunosensor

Developing low-cost and multiplexing electrochemical (EC) devices for bioassay is imperative. Herein, a polymer-based EC device, named EC 6-well plate, was proposed and fabricated using a non-photolithography method. Polyethylene terephthalate glycol (PETG) was used as a substrate and laser-cut polyester (PET) film was used as a mask for patterning the electrodes. The diameter of the working electrode (WE) was 900 μm, and each WE-modifying step only requires 1 μl of reagent. Acrylic mold with wells (60 μl) was bonded to the PETG substrate. Miniaturization of reference electrodes (RE) was discussed. The solid-state Ag/AgCl RE-based three-electrode system, the Au three-electrode system (3E), and Au two-electrode system (2E) were prepared and employed to develop an immunosensor for toxin B detection. Differential pulse voltammetry (DPV) and electrochemical impedance spectroscopy (EIS) were applied to test the stability of the EC immunosensor. The solid-state Ag/AgCl RE-based system showed a standard deviation of open circuit potential (OCP) of 4.6 mV. The 3E system and 2E system showed the standard deviations of OCP of 0.0026 mV and 0.32 mV, respectively. It revealed that the EC 6-well plate with the 3E system is excellent for developing an EC immunosensor.

Low-Cost 3D Printer Drawn Optical Microfibers for Smartphone Colorimetric Detection.

A fused deposition modeling (FDM) 3D printer extruder was utilized as a micro-furnace draw tower for the direct fabrication of low-cost optical fibers. An air-clad multimode microfiber was drawn from optically transparent polyethylene terephthalate glycol (PETG) filament. A custom-made spooling collection allows for an automatic variation of fiber diameter between ϕ ∼ 72 to 397 μm by tuning the drawing speed. Microstructure imaging as well as the 3D beam profiling of the transmitted beam in the orthogonal axes was used to show good quality, functioning microfiber fabrication with uniform diameter and identical beam profiles for orthogonal axes. The drawn microfiber was used to demonstrate budget smartphone colorimetric-based absorption measurement to detect the degree of adulteration of olive oils with soybean oil.