International Journal of Polymer Analysis and Characterization最新文献_第4页

Improved flow cell design for a more performant Gel Permeation Chromatography – Fourier Transform infrared (GPC-FTIR) analysis 改进的流动池设计，更高效的凝胶渗透色谱-傅里叶变换红外（GPC-FTIR）分析

IF 1.6 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2025-06-05 DOI: 10.1080/1023666X.2025.2512840

A. G. Boborodea , S. O’Donohue , A. Brookes , F. Zieschang , A. T. Boborodea

Gel Permeation Chromatography (GPC) and Fourier-Transform Infrared Spectroscopy (FTIR) are two powerful analytical techniques that have been used in polymer chemistry for decades. GPC can separate polymers based on their molecular weights, while FTIR can identify the functional groups present in the macromolecular chain. The main benefit of coupling GPC and FTIR is that they complement each other to provide a deeper insight into the molecular weight distribution and chemical composition of challenging polymers. Although over the last 60 years sporadic papers have been published on coupling the GPC with FTIR using a flow cell, the method has not gained widespread acceptance. This was largely due to the challenges associated with creating an interface to effectively combine both techniques without compromising their performance. Furthermore, the studies were done on in-house built instruments using components from various providers, as none of the major analytical laboratory equipment manufacturers had a specific program in place to support the development of GPC-FTIR technology. Here we present the development of a GPC-FTIR instrument based exclusively on Agilent Technologies components, with an improved design of the flow cell aimed at boosting signal-to-noise ratio and minimizing peak width. The system’s performance was evaluated by analyzing polymethylmethacrylate (PMMA) samples with narrow and broad molecular weight distributions.

凝胶渗透色谱（GPC）和傅里叶变换红外光谱（FTIR）是几十年来在聚合物化学中应用的两种强大的分析技术。GPC可以根据分子量分离聚合物，而FTIR可以识别大分子链上存在的官能团。结合GPC和FTIR的主要好处是它们可以相互补充，从而更深入地了解具有挑战性的聚合物的分子量分布和化学成分。虽然在过去的60年里，已经有零星的论文发表了使用流动池将GPC与FTIR耦合起来，但这种方法并没有得到广泛的接受。这主要是由于创建一个接口来有效地结合这两种技术而不影响其性能所带来的挑战。此外，由于主要的分析实验室设备制造商都没有专门的计划来支持GPC-FTIR技术的发展，因此研究是在内部制造的仪器上完成的，使用了来自不同供应商的组件。在这里，我们介绍了一种完全基于安捷伦技术组件的GPC-FTIR仪器的开发，其流池的改进设计旨在提高信噪比和最小化峰宽。通过分析分子量分布较窄和较宽的聚甲基丙烯酸甲酯（PMMA）样品来评价该系统的性能。

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引用次数: 0

Assessment of physical and mechanical and tribological characteristics of poly methyl methacrylate denture based composites doped with nano ceramic particles: a review 掺杂纳米陶瓷颗粒的聚甲基丙烯酸甲酯义齿基复合材料的物理力学和摩擦学特性评价

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2025-06-03 DOI: 10.1080/1023666X.2025.2504552

Dinesh Kumar Patel , Sachin Kumar , Gaurav Nandan , Shiv Ranjan Kumar

Poly methyl methacrylate (PMMA) is the most often used acrylic for partial and full dentures. Denture fractures are induced by fatigue as a result of repeated masticatory, flexural, and impact stresses. PMMA’s remarkable qualities, such as beauty, cost-effectiveness, ease of manipulation, low density, and tunable mechanical properties, make it an ideal option for use in dentistry. The durability of pure PMMA is improved by incorporating appropriate weight percentages of nano reinforcement of ceramic material. The doping of nano-reinforcement materials enhances the tensile strength, compressive strength, micro-hardness; flexural strength, yield strength, impact strength, transverse strength, thermal expansion coefficient and decreases water sorption of PMMA composites investigated by different researchers. This study explores how the biopolymer matrix (PMMA) is affected by aluminum oxide (Al₂O₃), zirconium oxide (ZrO₂), and titaniun dioxide (TiO₂) reinforcements in terms of mechanical, physical, and tribological characteristics of PMMA dental composites. Additionally, the applications of polymer- based composites are explored.

聚甲基丙烯酸甲酯（PMMA）是最常用的丙烯酸树脂用于部分和全口义齿。假牙骨折是由反复咀嚼、弯曲和冲击应力引起的疲劳引起的。PMMA的卓越品质，如美观，成本效益，易于操作，低密度和可调的机械性能，使其成为牙科应用的理想选择。通过加入适当重量百分比的纳米增强陶瓷材料，提高了纯PMMA的耐久性。纳米增强材料的掺杂提高了材料的抗拉强度、抗压强度、显微硬度；不同研究人员对PMMA复合材料的抗弯强度、屈服强度、冲击强度、横向强度、热膨胀系数和减水性进行了研究。本研究探讨了氧化铝（Al2O3）、氧化锆（ZrO2）和二氧化钛（TiO2）增强剂对PMMA牙科复合材料的机械、物理和摩擦学特性的影响。此外，还对聚合物基复合材料的应用进行了探讨。

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引用次数: 0

Tailoring surface properties of LDPE/EPDM blends via ion-beam bombardment 离子束轰击制备LDPE/EPDM共混物的表面特性

IF 1.6 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2025-06-03 DOI: 10.1080/1023666X.2025.2510972

M. Ali , R. A. M. Rizk , Z. I. Ali , I. E. Hassan , A. M. Abdul-Kader

Nowadays, improve the surface properties of polymeric materials for different applications become an important issue. This study involved the exposure of low-density polyethylene/ethylene diene propylene dine (LDPE/EPDM) blend to various fluencies of 130 keV He and 320 keV Ar ions ranging from 1 x 10¹³ to 2 x 10¹⁶ ions.cm⁻². LDPE/EPDM polymer blend structural changes have been examined using ultraviolet-visible (UV-VIS) and Photoluminescence (PL) spectrophotometry techniques. Energy dispersive X-ray (EDX) analysis has been done to find out what elements are present at the surface of LDPE/EPDM blends. The surface wettability, surface free energy, and spreading coefficient variations in LDPE/EPDM polymer blends subjected to ion beam bombardments have been investigated. The results of UV-Vis spectra demonstrated that increasing ion beam fluencies caused an increase in the optical absorption and red shift of the absorption edge which indicates a decrease in optical band gap. With an increase in the ion beam fluencies, a striking improvement was demonstrated in surface wettability, surface-free energy, and adhesion work for the bombarded LDPE/EPDM blends. These results demonstrated that ion-beam bombardment is an efficient technique to improvement the polymer surface properties for different technologies.

目前，提高高分子材料的表面性能成为不同应用领域的重要课题。本研究涉及低密度聚乙烯/乙烯二烯丙烯（LDPE/EPDM）共混物暴露于130 keV He和320 keV Ar离子的不同通量，范围从1 × 1013到2 × 1016离子。cm−2。采用紫外-可见（UV-VIS）和光致发光（PL）分光光度法研究了LDPE/EPDM共混聚合物的结构变化。通过能量色散x射线（EDX）分析，找出了LDPE/EPDM共混物表面存在的元素。研究了离子束轰击作用下LDPE/EPDM共混物的表面润湿性、表面自由能和扩散系数的变化。紫外可见光谱结果表明，离子束通量的增加引起了光吸收的增加和吸收边的红移，这表明光学带隙的减小。随着离子束通量的增加，轰击LDPE/EPDM共混物的表面润湿性、表面无能量和附着力都得到了显著改善。这些结果表明，离子束轰击是一种有效的改善聚合物表面性能的技术。

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引用次数: 0

Optoelectronic characteristics of PVA: Fe3O4 magnetic nanocomposite films PVA: Fe3O4磁性纳米复合薄膜的光电特性

IF 1.6 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2025-05-30 DOI: 10.1080/1023666X.2025.2506744

Siyamand S. Khasraw , Dyari M. Mamand , Salah R. Saeed , Abdollah Hassanzadeh , Shujahadeen B. Aziz , Omed Gh. Abdullah

Fe₃O₄ magnetic nanoparticles (NPs) were synthesized via the chemical co-precipitation method and incorporated into a polyvinyl alcohol (PVA) matrix at various concentrations (1, 3, 5, and 7 wt.%). The structural, morphological, magnetic, and optical properties of the nanocomposites were systematically characterized using FTIR, FE-SEM, XRD, UV–vis spectroscopy, and vibrating sample magnetometry (VSM). FTIR analysis revealed that the incorporation of Fe₃O₄ NPs led to notable shifts in the O–H bending vibrational frequencies, suggesting the formation of new hydrogen bonds between the Fe₃O₄ surface and hydroxyl groups of PVA chains. These interactions potentially alter the overall hydrogen bonding network within the polymer matrix. XRD results showed a gradual decrease in the degree of crystallinity with increasing nanoparticle content, indicating good dispersion and disruption of the semi-crystalline PVA structure. FE-SEM images confirmed the uniform distribution of NPs with minor micro-crack formation, especially at lower doping levels due to weak matrix-filler interactions. VSM measurements demonstrated that the magnetic properties of PVA were significantly enhanced due to the stabilization of Fe₃O₄ NPs through hydrogen bonding, which also minimized NP agglomeration. UV–vis analysis showed increased optical absorption, a rise in the refractive index, and enhanced optical dielectric constants with increasing Fe₃O₄ concentration. Additionally, the optical bandgap energy decreased, while the linear (χ⁽¹⁾) and third-order nonlinear (χ⁽³⁾) susceptibilities, along with the nonlinear refractive index (n₂), were significantly improved. These results indicate that Fe₃O₄/PVA nanocomposites are promising materials for magnetic, optical, and optoelectronic applications.

通过化学共沉淀法合成Fe3O4磁性纳米颗粒（NPs），并以不同的浓度（1、3、5和7 wt.%）掺入聚乙烯醇（PVA）基质中。采用FTIR、FE-SEM、XRD、UV-vis光谱和振动样品磁强计（VSM）等方法对纳米复合材料的结构、形貌、磁性和光学性能进行了系统表征。FTIR分析表明，Fe3O4 NPs的掺入导致了O-H弯曲振动频率的显著变化，表明Fe3O4表面与PVA链羟基之间形成了新的氢键。这些相互作用可能会改变聚合物基体内的整个氢键网络。XRD结果表明，随着纳米颗粒含量的增加，结晶度逐渐降低，表明半晶PVA结构具有良好的分散性和断裂性。FE-SEM图像证实NPs分布均匀，微裂纹形成较少，特别是在较低掺杂水平下，由于基质-填料相互作用弱。VSM测量结果表明，由于氢键稳定了Fe3O4 NPs， PVA的磁性能显著增强，同时也减少了NP团聚。紫外可见分析表明，随着Fe3O4浓度的增加，光学吸收增加，折射率上升，光学介电常数增强。光学带隙能量降低，线性（χ(1)）和三阶非线性（χ（³））磁化率以及非线性折射率（n2）显著提高。这些结果表明，Fe3O4/PVA纳米复合材料在磁性、光学和光电子领域具有广阔的应用前景。

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引用次数: 0

The relationship between thermal, rheological, and tack properties of copolyester-based hot melt adhesives 共聚酯基热熔胶的热、流变和粘性之间的关系

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2025-05-16 DOI: 10.1080/1023666X.2025.2501584

Michał Misiak , Paulina Latko-Durałek , Maria Mercedes Fernandez , Jorge L. Olmedo-Martínez , Dorota Kołbuk , Żaneta Górecka , Amir Malmir , Paulina Kozera , Alejandro J. Müller , Savvas G. Hatzikiriakos , Anna Boczkowska

This paper studies the interrelationships between the molecular weight, rheology, crystallinity, and tackiness of three types of commercial thermoplastic hot melt adhesives. The hot melt adhesives employed here differ in their compositions and molecular weights, even though all are copolyesters primarily based on poly(butylene terephthalate). Differences in the composition were found to influence the adhesives’ crystallization and melting behavior. These structural variations can translate into different thermal responses and processing characteristics relevant for tailoring adhesive selection to application requirements. Furthermore, adhesives with higher molecular weight were observed to possess larger elasticity, leading to significantly enhanced tackiness properties, as evidenced by the higher values of tensile modulus, peak stress, and work of debonding. This elevated tackiness was linked to the increased fibrillation process observed in polymers with higher molecular weights. Additionally, all tested adhesives exhibited storage moduli below the Dahlquist threshold (G′ < 3.3 × 10⁵ Pa), which supports their ability to achieve measurable tackiness during the initial bonding process. The results presented in this study underscore the diversity among hot melt adhesives and the critical properties that should be considered when selecting adhesives for specific applications.

本文研究了三种商用热塑性热熔胶的分子量、流变性、结晶度和粘性之间的相互关系。这里使用的热熔胶在成分和分子量上有所不同，尽管它们都是主要基于聚对苯二甲酸丁二酯的共聚聚酯。研究发现，不同成分对胶粘剂的结晶和熔化行为有影响。这些结构变化可以转化为不同的热响应和加工特性，从而根据应用要求定制粘合剂选择。此外，高分子量的胶粘剂具有更大的弹性，从而显著增强粘接性能，其拉伸模量、峰值应力和脱粘功均较高。这种升高的粘性与在分子量较高的聚合物中观察到的纤颤过程增加有关。此外，所有测试的粘合剂都显示出低于Dahlquist阈值(G ' <；3.3 × 105 Pa)，这支持了它们在初始粘合过程中实现可测量粘性的能力。本研究的结果强调了热熔胶的多样性以及在为特定应用选择粘合剂时应考虑的关键性能。

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引用次数: 0

Dielectric and thermal behavior analysis of polyester composites filled with pineapple wood dust using finite element method 菠萝木屑填充聚酯复合材料介电和热行为的有限元分析

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2025-05-15 DOI: 10.1080/1023666X.2025.2496319

Bishnupriya Sahoo , Priyabrat Pradhan , Abhilash Purohit , Hemalata Jena , Bibhuti Bhusan Sahoo

This study examines the dielectric and thermal characterization of pineapple wood dust (PWD)-filled polymer composites using the finite element method and experimental analysis. PWD was reinforced with polyester resin with different weight (0–25 wt. %) and volume (0–17.95 vol. %) percentages. Thermal conductivity tests were conducted as per the ASTM E-1530 in a Unitherm^™ 2022 model, whereas the dielectric properties were tested with the help of an HP LCR impedance analyzer and an HP 16451B dielectric tester. The experimental result showed a decrease in thermal conductivity values of polyester resin from 0.342 to 0.245 W/m-K with the inclusion of 17.95 vol. % PWD, which ensured enhanced thermal insulation. Further, the thermal conductivity values obtained from finite element analysis simulated using Digimat software were in good agreement with experimental values, and the error lies in between 1% and 10%. The experimental result showed a decrease in thermal conductivity values with increased PWD loading, which ensured enhanced thermal insulation. Further, the thermal conductivity values obtained from finite element analysis simulated using Digimat software were in good agreement with experimental values. The finite element analysis also revealed a decrease in heat flux density with the addition of PWD particles. The dielectric constant of the composites was found to be higher at lower frequencies and decreased with increasing frequency, which can be attributed to various polarization mechanisms. The dielectric constant of polyester resin also increased gradually with the addition of 25 wt. % PWD filler content from 1.4 to 2.7 at 1 MHz frequency.

本文采用有限元法和实验分析方法研究了菠萝木粉（PWD）填充聚合物复合材料的介电和热特性。用不同重量（0-25 wt）的聚酯树脂增强PWD。%)和音量(0-17.95卷。%)百分比。导热性测试根据ASTM E-1530在Unitherm™2022模型中进行，而介电性能则借助HP LCR阻抗分析仪和HP 16451B介电测试仪进行测试。实验结果表明，加入17.95 vol后，聚酯树脂的导热系数由0.342降至0.245 W/m-K。% PWD，确保了增强的隔热性能。此外，利用Digimat软件模拟的有限元分析所得的导热系数值与实验值吻合较好，误差在1% ~ 10%之间。实验结果表明，随着PWD载荷的增加，导热系数值降低，从而保证了保温性能的增强。此外，利用Digimat软件模拟的有限元分析所得的导热系数值与实验值吻合较好。有限元分析还表明，加入PWD颗粒后，热流密度有所降低。复合材料的介电常数在频率较低时较高，随着频率的增加而降低，这可以归因于不同的极化机制。随着25 wt的加入，聚酯树脂的介电常数也逐渐增大。% PWD填料含量从1.4到2.7在1mhz频率。

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引用次数: 0

Tuning the properties of novel and biodegradable ethyl-cellulose (EC)/rGO nanocomposite 调整新型可生物降解乙基纤维素/氧化石墨烯纳米复合材料的性能

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2025-05-13 DOI: 10.1080/1023666X.2025.2502811

K. K. Khichar , Ravina , S. B. Dangi , S. Z. Hashmi , B. L. Choudhary , N. S. Leel , Saurabh Dalela , A. M. Quraishi , Shalendra Kumar , Balsam F. I. Sofi , Aakansha , P. A. Alvi

This study investigates the tunable properties of novel and biodegradable ethyl cellulose (EC)/reduced graphene oxide (rGO) nanocomposites by varying concentrations of rGO nanofillers. The EC/rGO nanocomposites were prepared by an uncomplicated chemical mixing route. The influence of rGO content on the structural, optical, and electrical properties of the nanocomposite was systematically studied. The obtained results reveal that the incorporation of rGO enhances the crystallite size with reduced dislocation density and micro-strain in the nanocomposites. The incorporation of rGO was found capable of reducing bandgaps significantly by a magnitude of ∼0.62 eV with an increase in Urbach energy of ∼0.76 eV and a less enhanced refractive index of the nanocomposite. Further, D, G, 2D, and (D + G) modes were found to be present to define the Raman spectra of the nanocomposites. From FTIR spectra, the presence of C–H, C = O, and C–O stretching vibrations in the composite was confirmed. Moreover, electrical constraints, such as dielectric constant, dissipation factor, and ac and dc conductivity, along with frequency exponent, were found to be enhanced by increasing the strength of the incorporated rGO nanofiller. Thus, the findings provide critical insights into the design of biodegradable and multifunctional nanocomposites, paving the way for their application in sustainable packaging, electronics, and biomedical devices.

本研究通过不同浓度的还原氧化石墨烯纳米填料研究了新型可生物降解乙基纤维素(EC)/还原氧化石墨烯（rGO）纳米复合材料的可调性能。采用简单的化学混合方法制备了EC/rGO纳米复合材料。系统研究了还原氧化石墨烯含量对纳米复合材料结构、光学和电学性能的影响。结果表明，氧化石墨烯的加入使纳米复合材料的晶粒尺寸增大，位错密度减小，微应变减小。研究发现，rGO的掺入能够显著降低带隙约0.62 eV，乌尔巴赫能量增加约0.76 eV，纳米复合材料的折射率增强较小。此外，还发现了D、G、2D和（D + G）模式来定义纳米复合材料的拉曼光谱。从FTIR光谱中，证实了复合材料中存在C - h， C = O和C - O拉伸振动。此外，电学约束，如介电常数、耗散因子、交流和直流电导率，以及频率指数，被发现通过增加掺入的氧化石墨烯纳米填料的强度而增强。因此，这些发现为设计可生物降解的多功能纳米复合材料提供了重要的见解，为其在可持续包装、电子和生物医学设备中的应用铺平了道路。

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引用次数: 0

Synthesis and characterization of a set of novel copolymers by using RAFT polymerization method and “grafting through” strategy RAFT聚合和接枝共聚物的合成及表征

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2025-05-13 DOI: 10.1080/1023666X.2025.2502819

Bedrettin Savaş , Abdullah Karanfil , Efkan Çatıker , Temel Öztürk

This study synthesized a series of novel copolymers by introducing the polyethylene glycol segments to the polymethyl methacrylate skeleton. For this purpose, S,S’-(ethane-1,2-diyl) O,O’-diethyl bis(carbonodithioate), named RAFT agent, was synthesized by reacting 1,2-dibromoethane with potassium ethyl xanthogenate. Poly(methyl methacrylate-co-polyethylene glycol monomethyl ether monomethacrylate) [poly(MMA-co-PEGMMA)] copolymer was synthesized by reversible addition-fragmentation chain transfer polymerization (RAFT) method and the “grafting through” strategy using the RAFT agent, methyl methacrylate, and different lengths (Mw of PEG unit = 200, 400, and 1000 g.mol⁻¹) of polyethylene glycol monomethyl ether monomethacrylate (PEGMMA) as macromonomers. The three copolymers of poly(MMA-co-PEGMMA) with three different grafting degrees (5, 10, and 20% by mass) were obtained successfully. Structural and thermal features of poly(MMA-co-PEGMMA) copolymers were examined using FT-IR, ¹H-NMR, GPC, TGA, and DSC methods.

本研究通过在聚甲基丙烯酸甲酯骨架上引入聚乙二醇段，合成了一系列新型共聚物。为此，以1,2-二溴乙烷和乙基黄原酸钾为原料，合成了S，S ' -（乙烷-1,2-二基）O,O ' -二乙基双（碳酸二硫酸盐）RAFT试剂。以RAFT助剂、甲基丙烯酸甲酯和不同长度（PEG单元的分子量分别为200、400和1000 g.mol - 1）的聚乙二醇单甲醚单甲基丙烯酸甲酯（PEGMMA）为大单体，采用可逆加成-破碎链转移聚合（RAFT）法和接枝策略合成了聚(甲基丙烯酸甲酯-共聚（MMA-co-PEGMMA）共聚物。成功地得到了三种不同接枝度（5、10和20%质量比）的聚（MMA-co-PEGMMA）共聚物。采用FT-IR、1H-NMR、GPC、TGA和DSC等方法研究了聚（MMA-co-PEGMMA）共聚物的结构和热特性。

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引用次数: 0

Structural, mechanical, thermal characterizations of Agave sisalana fiber- reinforced composite and finite element analysis of composite helical compression spring 龙舌兰纤维增强复合材料的结构、力学、热特性及复合螺旋压缩弹簧的有限元分析

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2025-05-06 DOI: 10.1080/1023666X.2025.2496306

C. Balaji Ayyanar , N. Sridhar , T. Mugilan , S. K. Pradeepmohan

Despite having been studied in a range of applications, the use of sisal fiber-reinforced composites in helical compression springs is rare. Thus, this particular study shows the feasibility of replacing conventional metal springs with lightweight composite springs in the interest of furthering sustainable engineering. This study focused on the successful fabrication of a helical compression spring using the filament winding process – a method not very commonly applied to such components. The tensile strength of 66.74 MPa and flexural strength of 70.47 MPa composite specimens were found. The surface morphology and elemental compositions of the composite were found through FESEM and EDX. The DSC analysis found the onset temperature of the thermal event begins at 351.7 °C and ends at 392.8 °C. The area under the peak, representing the energy absorbed, is 100.4 J/g, indicating the amount of heat involved during crosslinking of the composite matrix. The TG analysis revealed the stability of the composite from ∼30 °C to ∼300 °C. Around 300 °C, there is a significant drop in residual weight, indicating decomposition of the composite. The helical compression spring was designed and fabricated through the filament winding process. A 3D model of the spring was developed using SolidWorks and finite element analysis (FEA) of the spring was done using ANSYS. The results revealed a maximum stiffness of 1.87 N/mm at 35 N, validating the material for low-strength applications. Future work should optimize fiber–matrix interaction and study the proposed composite for lightweight suspension systems, vibration-damping components, and other eco-friendly options in the automotive industries.

尽管已经研究了一系列的应用，剑麻纤维增强复合材料在螺旋压缩弹簧的使用是罕见的。因此，这项特别的研究表明，为了进一步促进可持续工程的发展，用轻质复合弹簧取代传统金属弹簧是可行的。这项研究的重点是成功地制造了螺旋压缩弹簧，使用长丝缠绕工艺-一种不太常用的方法应用于此类组件。复合材料的抗拉强度为66.74 MPa，抗折强度为70.47 MPa。通过FESEM和EDX分析了复合材料的表面形貌和元素组成。DSC分析发现热事件的起始温度为351.7℃，结束温度为392.8℃。峰下面积代表吸收的能量，为100.4 J/g，表示复合基体交联过程中所涉及的热量。热重分析显示复合材料在~ 30°C到~ 300°C之间具有稳定性。在300℃左右，残余重量显著下降，表明复合材料分解。采用长丝缠绕工艺设计并制作了螺旋压缩弹簧。利用SolidWorks软件建立了弹簧的三维模型，利用ANSYS软件对弹簧进行了有限元分析。结果显示，在35牛的情况下，该材料的最大刚度为1.87牛/毫米，验证了该材料的低强度应用。未来的工作应该是优化纤维-基质的相互作用，并研究轻型悬架系统、减振部件和其他环保汽车行业的复合材料。

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引用次数: 0

Enhanced bioactivity of regenerated eggshell membrane hydrogels with strontium-doped hydroxyapatite for potential bone tissue regeneration 含锶羟基磷灰石的再生蛋壳膜水凝胶对骨组织再生的生物活性增强

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2025-05-03 DOI: 10.1080/1023666X.2025.2497389

Aakriti Aggarwal , Lajpreet Kaur , Debasish Nath , Himanshu Ojha , Asish Pal , Mahesh Kumar Sah

Tissue engineering has emerged as a promising alternative for bone repair. Avian eggshell membrane stands out among potential biomaterials due to its low immunogenicity, similarity to the extracellular matrix, and widespread availability. This study focuses on developing a bone ingrowth support system from a regenerated avian eggshell membrane. The collagenous and non-collagenous protein fractions were developed into hydrogels with poly-(vinyl alcohol) (PVA) via freeze-thawing, followed by their incorporation with hydroxyapatite and strontium-doped hydroxyapatite synthesized from the eggshell cuticle. Their physicochemical analysis revealed the biphasic nature of hydroxyapatite and Ca/P and (Ca + Sr)/P ratios of 1.25 and 1.27, respectively. The characterization with ATR-FTIR revealed the identification of amide I, amide III, and –OH functional groups at 1639 cm⁻¹, 1264 cm⁻¹, and 3308 cm⁻¹, respectively, for all the hydrogels, along with a broad peak observed between 16° and 24° (2θ) in the XRD data. Evaluation of hydrogels’ morphology, degradation (40%−50%), swelling (162%−750%), mechanical properties (1.4 MPa–3.5 MPa), and biocompatibility with osteoblasts (>87%) demonstrated their suitability for bone regeneration. Further, histopathological examination of rat tibial bone demonstrated enhanced bone repair, with the findings strongly suggesting the potential application of the regenerated avian eggshell membrane in promoting bone regeneration.

组织工程已经成为一种很有前途的骨修复方法。禽蛋壳膜因其低免疫原性、与细胞外基质相似以及广泛可用性而在潜在的生物材料中脱颖而出。本研究的重点是利用再生的禽蛋壳膜制备骨长入支撑系统。将胶原蛋白和非胶原蛋白用聚乙烯醇（PVA）冻融成水凝胶，然后与从蛋壳角质层合成的羟基磷灰石和掺锶羟基磷灰石掺入。理化分析表明，羟基磷灰石具有双相性质，Ca/P和(Ca + Sr)/P比值分别为1.25和1.27。ATR-FTIR表征表明，所有水凝胶在1639 cm−1、1264 cm−1和3308 cm−1处分别鉴定出酰胺I、酰胺III和-OH官能团，并在16°和24°（2θ）处观察到一个宽峰。水凝胶的形态、降解（40% - 50%）、肿胀（162% - 750%）、力学性能（1.4 MPa - 3.5 MPa）和与成骨细胞的生物相容性（87%）的评估表明它们适合骨再生。此外，大鼠胫骨的组织病理学检查显示骨修复增强，这一发现强烈提示再生禽蛋壳膜在促进骨再生方面的潜在应用。

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