International Journal of Polymer Analysis and Characterization最新文献

Exploring the material and mechanical characteristics of 3D printed composites utilizing nSiO2-particulate-reinforced PLA/HDPE filaments with potential applications in the medical field

IF 1.7 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2025-01-09 DOI: 10.1080/1023666X.2024.2444320

Aezhisai Vallavi M. S. , Mugilan. T. , Sridhar. N.

{"title":"Exploring the material and mechanical characteristics of 3D printed composites utilizing nSiO2-particulate-reinforced PLA/HDPE filaments with potential applications in the medical field","authors":"Aezhisai Vallavi M. S. , Mugilan. T. , Sridhar. N.","doi":"10.1080/1023666X.2024.2444320","DOIUrl":"10.1080/1023666X.2024.2444320","url":null,"abstract":"<div><div>Significant progress in 3D printing technology over recent decades has allowed for the creation of biomedical products with enhanced properties. The incorporation of composite materials in 3D printing offers innovative solutions to a wide range of real-world challenges in medical applications. The present research focuses on the additively manufactured 3D-printed polymer composites developed through the fused deposition modeling technique. Mechanical characteristics such as tensile, compressive, flexural, and Shore D hardness have been investigated in pure PLA/HDPE and with different 1, 2, 3 wt.% of functionalized nSiO<sub>2</sub> reinforced PLA/HDPE. Their results showed that excellent mechanical strength was observed in the 2 wt.% nSiO<sub>2</sub>/PLA/HDPE composite as 147.3 MPa tensile strength and 4.05 GPa Young's modulus. Subsequently, the material characteristics of the 2 wt.% nSiO<sub>2</sub>-reinforced composite were investigated with various analytical techniques. FESEM micrographs revealed that the developed composites with a rougher surface promoted cell attachment and proliferation and had no delaminated parts in the printed layer. EDAX analysis confirmed the reinforcement material nSiO<sub>2</sub> particles present in the developed composite. The prominent sharp peaks of nSiO<sub>2</sub> incorporated in the 3D-printed composite have an excellent crystallinity nature with 84.3%. The presence of nSiO<sub>2</sub> reinforcement in the composite matrix was confirmed by FTIR and Raman spectroscopy. TGA/DTG results displayed the 7.36% high thermal stability of the nSiO<sub>2</sub>-reinforced composite. Thus, the developed composite was found to be a promising material for bone implants in biomedical applications.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 2","pages":"Pages 155-176"},"PeriodicalIF":1.7,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fabrication, optical behavior and structural characteristics of the poly (4-chloroaniline)/silver nanoparticles materials for optical devices

IF 1.7 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2025-01-06 DOI: 10.1080/1023666X.2024.2447000

B. M. Alotaibi , Hadeel A. Aldossary , A. Atta , E. Abdeltwab , M. M. Abdelhamied

{"title":"Fabrication, optical behavior and structural characteristics of the poly (4-chloroaniline)/silver nanoparticles materials for optical devices","authors":"B. M. Alotaibi , Hadeel A. Aldossary , A. Atta , E. Abdeltwab , M. M. Abdelhamied","doi":"10.1080/1023666X.2024.2447000","DOIUrl":"10.1080/1023666X.2024.2447000","url":null,"abstract":"<div><div>In this study, the flexible composite P(4-CAni)/AgNPs, which consists of poly 4-chloroaniline P(4-CAni) and silver nanoparticles (AgNPs), was successfully prepared using the polymerization preparation method. The results were confirmed by the transmission electron microscope (TEM), X-ray diffraction (XRD), and Fourier-transform infrared spectroscopy (FTIR). The XRD shows the successful fabrication of the composite and confirms that the pure P(4-CAni) has a typical pattern for the amorphous conducting polymer. The results of the TEM indicated the size of AgNPs in the range from 13 to 28 nm. In addition, the FTIR demonstrates that the AgNPs nanoparticles are uniformly interacted with the P(4-CAni). The wettability and adhesion work of the surface were determined by measuring the contact angle. Moreover, the band tail increased from 1.15 eV for the P(4-CAni) to 1.85 eV, 1.91 eV, and 1.96 eV when P(4-CAni) is mixed with 1.5%, 3%, and 4.5% AgNPs, respectively. Also, adding 1.5%, 3%, and 4.5% AgNPs decreases the band gap energy from 3.48 eV for the P(4-CAni) to 3.12 eV, 3.04 eV, and 2.90 eV, respectively. The interaction between P(4-CAni) and AgNPs enhances the structural properties of the composite, making the P(4-CAni)/AgNPs composite a multifunctional material suitable for various applications. The results demonstrate the fabricated nanocomposite materials exhibiting novel optical properties, which could lead to the use of these composites in optoelectronic devices.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 2","pages":"Pages 177-189"},"PeriodicalIF":1.7,"publicationDate":"2025-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Physical and biological characteristics of electrospun poly (vinyl alcohol) and reduced graphene oxide nanofibrous structure

IF 1.7 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2025-01-02 DOI: 10.1080/1023666X.2024.2424264

Hilal Turkoglu Sasmazel , Marwa Alazzawi , Melike Gozutok , Veera Sadhu

{"title":"Physical and biological characteristics of electrospun poly (vinyl alcohol) and reduced graphene oxide nanofibrous structure","authors":"Hilal Turkoglu Sasmazel , Marwa Alazzawi , Melike Gozutok , Veera Sadhu","doi":"10.1080/1023666X.2024.2424264","DOIUrl":"10.1080/1023666X.2024.2424264","url":null,"abstract":"<div><div>The fabrication of graphene-based nanocomposites has been a topic of increasing interest due to graphene’s exceptional physical properties and the ability to enhance the properties of various polymeric materials. Evaluating the biocompatibility of these nanocomposites is crucial to ensure their safe and effective use in biomedical applications. This study characterized and assessed the biocompatibility of previously fabricated electrospun polyvinyl alcohol (PVA)/reduced graphene oxide rGO fibrous structures by conducting a comprehensive assessment of their physical and biological characteristics. Contact angle measurements revealed that adding rGO to electrospun PVA fibers enhanced the surface wettability, improving the fibrous structure’s PBS absorption capacity and degradation behavior. Including the rGO content resulted in a higher water vapor transmission rate, reaching ∼48 g/m<sup>2</sup>·day for PVA + 0.5 wt.% rGO and ∼45 g/m<sup>2</sup>·day for PVA + 1.0 wt.% rGO, compared to ∼40 g/m<sup>2</sup>·day for electrospun PVA fibers. Cell culture studies, including MTT assay, alkaline phosphatase (ALP) activity analysis, alizarin red staining, fluorescence microscopy, and SEM analyses, demonstrated that electrospun PVA + 1.0 wt.% rGO nanocomposites exhibited superior cell viability, proliferation, and growth compared to other samples, due to the improved physical properties of the PVA + 1.0 wt.% rGO fibrous structure.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 1","pages":"Pages 83-97"},"PeriodicalIF":1.7,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143165149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermal stability and combustion properties of polyurethane foam modified with manganese phytate and expandable graphite

IF 1.7 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2025-01-02 DOI: 10.1080/1023666X.2024.2421816

Xu Zhang , Meng Zhang , Handong Li , Zhi Wang , Hua Xie

{"title":"Thermal stability and combustion properties of polyurethane foam modified with manganese phytate and expandable graphite","authors":"Xu Zhang , Meng Zhang , Handong Li , Zhi Wang , Hua Xie","doi":"10.1080/1023666X.2024.2421816","DOIUrl":"10.1080/1023666X.2024.2421816","url":null,"abstract":"<div><div>Manganese phytate (MnPa) was prepared and synergistically combined with expandable graphite (EG) flame retardant modified polyurethane foam (PUF). Utilizing thermogravimetric (TG), pyrolysis kinetic analysis, CONE analysis, smoke toxicity analysis, limiting oxygen index (LOI), and UL-94 horizontal combustion test procedures, the thermal stability and combustion parameters of the modified PUFs were examined. The flame retardancy and smoke suppression of the modified PUFs were analyzed based on the heat release rate (HRR), total heat release (THR), smoke production rate (SPR), and total smoke release (TSR). The results showed that MEPUF3 had the highest thermal decomposition rate temperature, initial thermogravimetric temperature, and activation energy (E). It was shown that MEPUF3 had the lowest HRR of 17.68 kW/m<sup>2</sup>, the lowest THR of 1.15 MJ/m<sup>2</sup>, the lowest SPR of 0.0046 m<sup>2</sup>/s, the lowest TSR of 19.58 m<sup>2</sup>/m<sup>2</sup>, the lowest Ds of 32.1, the highest transmittance of 57.7%, and the highest LOI of 23.0%. The present study showed that MEPUF3 possessed good thermal stability and flame retardant properties, which provided useful references for subsequent phytate and EG-modified PUFs.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 1","pages":"Pages 47-67"},"PeriodicalIF":1.7,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143165147","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Graft copolymerization of carboxymethylcellulose with solketal acrylate

IF 1.7 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2025-01-02 DOI: 10.1080/1023666X.2024.2445671

Khaled Beyaz , Emeline Vedrenne , Carlos Vaca-Garcia , Sophie Thiebaud-Roux , Ahmed Benaboura , Nabila Haddadine

{"title":"Graft copolymerization of carboxymethylcellulose with solketal acrylate","authors":"Khaled Beyaz , Emeline Vedrenne , Carlos Vaca-Garcia , Sophie Thiebaud-Roux , Ahmed Benaboura , Nabila Haddadine","doi":"10.1080/1023666X.2024.2445671","DOIUrl":"10.1080/1023666X.2024.2445671","url":null,"abstract":"<div><div>The objective of this work is to synthesize new materials based on cellulose fiber. In this study, we presented the synthesis of a new biomaterial by conducting graft polymerization of 2,2-dimethyl-1,3-dioxolan-4-yl methyl acrylate (DMDMA solketal acrylate) onto carboxymethylcellulose (CMC), using KPS as an initiator. We conducted several experiments to determine the optimal conditions for preparing this biopolymer, varying the reaction time and the ratio between the initiator and the monomer. The results revealed that the highest grafting yield, 52%, was obtained after 72 min at 65 °C, with 6.26 mmol of KPS/eq OH and 4.43 moles of DMDMA/eq OH, using THF as a solvent. FTIR spectroscopy confirmed the grafting of monomers onto the CMC. Thermogravimetry showed that the degradation of the grafted CMC occurs in two stages, unlike the degradation of the CMC, which occurs in a single stage, confirming the modification of the starting product. SEM images clearly show the morphological difference between the CMC and the grafted CMC. The BET analysis reveals moderate adsorption at low pressure, followed by a marked increase at high pressure, indicating the presence of mesopores. The hysteresis between adsorption and desorption also suggests closed pore structures. The pore size distribution shows a predominance of pores between 30 and 100 Å, providing an optimal specific surface area for small molecule adsorption and catalytic reactions. This mesoporous profile is suitable for adsorption and catalysis applications. To our knowledge, our study represents the first use of the synthesized monomer, DMDMA solketal acrylate, for grafting onto the structure of CMC, highlighting the originality of our research.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 2","pages":"Pages 190-201"},"PeriodicalIF":1.7,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis of decorated polyborosiloxane for enhancing the flame retardancy and mechanical property of epoxy resin

IF 1.7 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2025-01-02 DOI: 10.1080/1023666X.2024.2425720

Xiaoliang Zeng , Hua Mao , Qijun Liu , Fuxiang Li , Xinsheng Lan , Fangqiang Wang , Yu Song , Mingwei Li , Tianhao Zhang

{"title":"Synthesis of decorated polyborosiloxane for enhancing the flame retardancy and mechanical property of epoxy resin","authors":"Xiaoliang Zeng , Hua Mao , Qijun Liu , Fuxiang Li , Xinsheng Lan , Fangqiang Wang , Yu Song , Mingwei Li , Tianhao Zhang","doi":"10.1080/1023666X.2024.2425720","DOIUrl":"10.1080/1023666X.2024.2425720","url":null,"abstract":"<div><div>In this work, the decorated polyborosiloxane (MAPBS) with phosphorus-nitrogen components was first synthesized via a hydrolysis-condensation reaction and thus incorporated the MAPBS filler into epoxy resin (EP) to fabricate composites by a simple blending method. It could be found that the MAPBS with epoxy groups showed a good dispersion level in the EP matrix, endowing EP composites with superior flame retardancy and mechanical properties. Thanks to the combination of phosphorus-, nitrogen-, boron-, and silica-containing units in MAPBS filler, the addition of 6 wt% MAPBS made EP achieve significantly improved limiting oxygen index (25.2 ± 0.5%) and UL-94 rating (V1). Meanwhile, cone calorimeter test results revealed that the peak heat release rate (PHRR), total heat release (THR), and total smoke production (TSP) of the EP-MAPBS6 composite were reduced by 31%, 62%, and 67%, respectively, as compared to the pure EP. In addition, the MAPBS6 composite exhibited balanced tensile strength (105.1 MPa) and elongation at break (87.6%) among the prepared samples. The present work provides an effective strategy to fabricate EP composites with improved comprehensive performances.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 1","pages":"Pages 98-108"},"PeriodicalIF":1.7,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143165148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tamarind gum based magnesium ion conducting polymer membrane for energy storage applications

IF 1.7 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2025-01-02 DOI: 10.1080/1023666X.2024.2416212

P. Saranya , K. Sundaramahalingam , D. Vanitha , M. Nandhinilakshmi , V. N. Vijayakumar

{"title":"Tamarind gum based magnesium ion conducting polymer membrane for energy storage applications","authors":"P. Saranya , K. Sundaramahalingam , D. Vanitha , M. Nandhinilakshmi , V. N. Vijayakumar","doi":"10.1080/1023666X.2024.2416212","DOIUrl":"10.1080/1023666X.2024.2416212","url":null,"abstract":"<div><div>A solid bio polymer electrolyte (SPE) based on tamarind gum (TG) and magnesium nitrate was synthesized by a solution casting technique. The amorphous behavior is observed by X-ray diffraction (XRD) analysis, and the degree of crystallinity is calculated from the XRD deconvolution spectra. The interaction between the polymer and the salt was confirmed by Fourier transform infrared (FTIR) analysis. Using FTIR deconvolution spectra, the percentage of free ions can be calculated. The glass transition temperature (T<sub>g</sub>) was determined via differential scanning calorimetry (DSC). A higher ionic conductivity (σ) of 1.97 × 10<sup>−4</sup> S/cm is observed for the sample with 1 g of tamarind gum and 0.5 g of magnesium nitrate (4 TMN). The conduction mechanism shows that sample 4 TMN obeys the quantum mechanical tunneling model (QMT) at low frequency. The prepared SPEs follow the Arrhenius behavior, and the minimum activation energy (E<sub>a</sub>) of 0.207 eV is observed for sample 4 TMN. The lowest relaxation time (τ) was 3.46 × 10<sup>−7</sup> s for 4-TMN according to the tangent spectra. The transference number of ions (t<sub>ion</sub>) is calculated by Wagner’s polarization method. The electrochemical stability window observed by linear sweep voltammetry (LSV) is 2.25 V. The primary battery is fabricated by using sample 4TMN, and an open circuit voltage (OCV) of 2.01 V is observed.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 1","pages":"Pages 1-25"},"PeriodicalIF":1.7,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143165284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Induction of physico-chemical properties in mercerized Yucca filamentosa fiber-based graft copolymer through response surface methodology and its characterization

IF 1.7 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2025-01-02 DOI: 10.1080/1023666X.2024.2419050

Surjit Kaur , Mithu Maiti Jana , Asim Kumar Jana

{"title":"Induction of physico-chemical properties in mercerized Yucca filamentosa fiber-based graft copolymer through response surface methodology and its characterization","authors":"Surjit Kaur , Mithu Maiti Jana , Asim Kumar Jana","doi":"10.1080/1023666X.2024.2419050","DOIUrl":"10.1080/1023666X.2024.2419050","url":null,"abstract":"<div><div>This research article describes the physicochemical modification of mercerized <em>Yucca filamentosa (Yf<sub>m</sub>)</em> fiber by graft copolymerization with ethylmethacrylate, using ferrous ammonium sulfate-potassium persulfate (FAS-KPS) as a redox initiator. Initially, six process parameters; reaction duration, reaction temperature, solvent amount, pH, FAS:KPS ratio, and monomer concentration were used in the study in a sequential experimental design technique, and the significant process variables affecting the yield of the graft copolymer were identified. The resolution-V design method identified the significant parameters as the reaction temperature, amount of solvent, and the concentration of monomer. In second phase of the study, the screened variables were utilized in the development of a model through the technique of response surface methodology (RSM) for the prediction of the yields, and its optimization. The developed RSM model fitted well with the experimental data, and predicted for the optimal conditions of reactions as reaction duration 120 min, pH 7.0, and the monomer 2.96 × 10<sup>−3 </sup>mol/L; at which the highest graft yield percentage obtained was 133.7%. The techniques of FTIR, SEM, and XRD were used for the characterization of untreated fiber, mercerized fiber, and graft copolymers. Studies of the various physico-chemical properties showed that the produced graft copolymers were more resistant to acid and base than the both natural and mercerized fibers.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 1","pages":"Pages 26-46"},"PeriodicalIF":1.7,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143165286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Extraction, characterization, and evaluation of galactomannan from Barbatimão Verdadeiro as a potential additive for enhanced oil recovery fluids

IF 1.7 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2025-01-02 DOI: 10.1080/1023666X.2024.2421817

Mariana S. Aquino , Juliana P. Senna , Claudia R. E. Mansur

{"title":"Extraction, characterization, and evaluation of galactomannan from Barbatimão Verdadeiro as a potential additive for enhanced oil recovery fluids","authors":"Mariana S. Aquino , Juliana P. Senna , Claudia R. E. Mansur","doi":"10.1080/1023666X.2024.2421817","DOIUrl":"10.1080/1023666X.2024.2421817","url":null,"abstract":"<div><div>Polymers play a crucial role in enhanced oil recovery (EOR) by increasing the viscosity of injection fluids and enhancing oil displacement. The widely used polymer, partially hydrolyzed polyacrylamide (HPAM), faces performance degradation in high-salinity and high-temperature environments. This study explores galactomannan from <em>Stryphnodendron polyphyllum</em> seeds as an alternative viscosifying agent for EOR fluids. An extraction process for galactomannan from Barbatimão Verdadeiro seeds was developed, yielding 23.3% m/m. The biopolymer was characterized using Fourier transform infrared spectroscopy (FTIR), nuclear magnetic resonance (NMR), thermogravimetric analysis (TGA), and size exclusion chromatography (SEC). Rheological behavior was tested in brines of different salinities, and injectivity/filterability tests were performed following API RP 63:1990 standards. The galactomannan obtained from <em>Stryphnodendron polyphyllum</em> exhibited a mannose-to-galactose ratio of 1.32. Rheological analysis showed pseudoplastic behavior, with viscosities of 38 cP in brine solutions at 7.37 s<sup>−1</sup> and 60 °C. Filterability tests demonstrated satisfactory injectivity with factors of 1.09 (8 µm) and 0.67 (1.2 µm). Compared to HPAM, galactomannan exhibited superior viscosity retention in high-salinity conditions, where HPAM dropped to 6 cP. The galactomannan extracted from <em>Stryphnodendron polyphyllum</em> seeds is a promising biopolymer for EOR applications, offering superior performance under harsh conditions compared to traditional HPAM. Its resilience to high salinity and temperature makes it a viable alternative for pre-salt and offshore fields, contributing to more sustainable and efficient oil recovery.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 1","pages":"Pages 68-82"},"PeriodicalIF":1.7,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143165285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Technique for measuring the low pull-out forces of bonded fibers: application to glue-based false eyelashes

IF 1.7 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2024-12-31 DOI: 10.1080/1023666X.2024.2441939

Nathan Macdonald , Jimmy Mays

{"title":"Technique for measuring the low pull-out forces of bonded fibers: application to glue-based false eyelashes","authors":"Nathan Macdonald , Jimmy Mays","doi":"10.1080/1023666X.2024.2441939","DOIUrl":"10.1080/1023666X.2024.2441939","url":null,"abstract":"<div><div>Until now, no method has been reported for measuring fiber pull-out forces in false eyelashes. Many false eyelashes are handmade and are comprised of poly(butylene terephthalate) (PBT) lashes with glue bases. Due to their small size, delicate nature, and complexity with regards to varying depths of embedment, angle of attachment of fibers to the base, and physical interactions between fibers of false eyelashes, conventional tensile testing machines are not able to grip individual lashes and accurately measure the small forces of detachment. In this work, a custom tensile testing instrument was used to investigate the effect of an approximately 120 °C curling step on the strength of adhesion of PBT fibers to the glue base. To account for the effects of structural complexity on the mechanical pull-out strength of individual fibers, 20 individual fibers were pulled from 11 different models of eyelashes, both before and after curling. A Kolmogorov-Smirnov normality test was employed to assure the data collected were normally distributed, and means and standard deviations were calculated. A two-tailed t-test revealed that 10 of the 11 tested eyelash models showed no statistically significant difference in mechanical strength before versus after the curling process.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 2","pages":"Pages 133-141"},"PeriodicalIF":1.7,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0