Composites Part A: Applied Science and Manufacturing最新文献_第7页

Application of vitrimer-based sizing agent onto carbon fibres through thiol-ene photo-polymerisation 巯基光聚合树脂基施胶剂在碳纤维上的应用

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2026-03-01 Epub Date: 2025-12-08 DOI: 10.1016/j.compositesa.2025.109495

Yi Wang , Qixing Jiang , Dominik Vorlaufer , Alexander Bismarck , Jonny Blaker , Matthieu Gresil

This work introduces photocuring as a method to apply a vitrimer-based sizing agent onto carbon fibres (CFs) via a thiol–ene reaction. The vitrimer molecule, bisphenol A glycerolate di(norbornenyl ester) (BPAGDN), was synthesised as the sizing agent. Surface treatments including oxidation and silanisation were performed on unsized AS4 CFs to graft thiol groups onto the surface. Upon UV irradiation, norbornene groups on BPAGDN reacted with surface thiol groups through a photo-initiated thiol–ene reaction, coating the CFs with BPAGDN. IR spectroscopy confirmed the epoxy–acid reaction mechanism, with full conversion achieved after 14 h. The molecular structure of BPAGDN was verified by NMR. Surface treatments led to an oxygen content increase of 5.09 %, the appearance of sulphur (1.83 %), and an increase in O’-C=O bonding by 21.42 %, as determined by XPS. The vitrimer coating increased fibre diameter from 7.04 ± 0.06 µm to 7.72 ± 0.15 µm. Mechanical properties of sized CFs remained similar to unsized CFs, though with a 26.35 % decrease in Weibull modulus. The interfacial shear strength (IFSS) of 5-min vitrimer-sized CFs increased by 24.37 % (from 66.75 MPa to 83.01 MPa), due to enhanced fibre–matrix bonding. This work demonstrates a non-destructive vitrimer sizing method using BPAGDN and UV irradiation, yielding stronger fibre–matrix interfaces.

这项工作介绍了光固化作为一种方法，将基于玻璃体的施胶剂通过巯基反应应用到碳纤维（CFs）上。合成了双酚A甘油二降冰片烯酯（BPAGDN）作为施胶剂。表面处理包括氧化和硅烷化，在未尺寸的AS4 cf上进行接枝硫醇基团到表面。在紫外线照射下，BPAGDN上的降冰片烯基团通过光引发的硫醇烯反应与表面的硫醇基团反应，将BPAGDN包覆在cf上。红外光谱证实了环氧酸反应机理，14 h后反应完全转化。核磁共振证实了BPAGDN的分子结构。表面处理使氧含量增加5.09%，硫的出现增加1.83%,O ' -C=O键的形成增加21.42%。玻璃体涂层使纤维直径从7.04±0.06µm增加到7.72±0.15µm。加浆碳纤维的力学性能与未加浆碳纤维相似，但威布尔模量降低了26.35%。由于增强了纤维与基体的结合，5 min后玻璃体尺寸碳纤维的界面剪切强度（IFSS）增加了24.37%（从66.75 MPa增加到83.01 MPa）。这项工作展示了一种使用BPAGDN和紫外线照射的非破坏性玻璃体上浆方法，产生更强的纤维基质界面。

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引用次数: 0

Screw extrusion-assisted additive manufacturing of high-strength 12K continuous carbon fiber-reinforced nylon composites 螺杆挤出辅助增材制造高强12K连续碳纤维增强尼龙复合材料

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2026-03-01 Epub Date: 2025-11-27 DOI: 10.1016/j.compositesa.2025.109472

Zhenyu Yang , Chenghuan Wu , Xingyu Wang , Zhonglue Hu , Wei Chen , Weiping Dong , Sisi Wang , Xiping Li

The light-weight, high-strength continuous carbon fiber-reinforced thermoplastic composites (CCFRPs) are the ideal candidates for the high-performance structural materials. However, this superior material’s full potential is yet untapped, as the current filament-based additive manufacturing scheme has a limited impregnation capability, confining usable materials to narrow 1K/3K CCF tows. To bridge such gap, this study developed a screw extrusion-assisted in-situ impregnation and 3D printing system, enabling efficient fabrication of highly strong thermoplastic composites reinforced with 12K CCF tows. Microstructural characterization and mechanical testing reveal that the as-impregnated CCF tows exhibit exceptional mechanical properties, with a maximum tensile strength of 1063.7 MPa, an elastic modulus of 62.4 GPa, and a low internal porosity of 3.2 %. Through systematic optimization of the PA6 matrix composition and printing parameters, an optimal short carbon fiber (SCF) loading of 10 wt% was identified, enabling the 3D-printed composites to achieve a remarkable tensile strength of up to 804.2 MPa. This exceptional performance is attributed to the unique screw extrusion process, which facilitates efficient in-situ fiber impregnation and deposition, offering a promising, low-cost, and flexible pathway for manufacturing large, high-strength composite structures.

轻质、高强连续碳纤维增强热塑性复合材料（CCFRPs）是高性能结构材料的理想选择。然而，这种优越材料的全部潜力尚未开发，因为目前基于长丝的增材制造方案具有有限的浸渍能力，将可用材料限制在狭窄的1K/3K CCF束。为了弥补这一差距，本研究开发了一种螺杆挤出辅助原位浸渍和3D打印系统，能够高效地制造出用12K CCF束增强的高强度热塑性复合材料。微观组织表征和力学测试表明，浸渍CCF具有优异的力学性能，最大抗拉强度为1063.7 MPa，弹性模量为62.4 GPa，内部孔隙率为3.2%。通过对PA6基体成分和打印参数的系统优化，确定了10 wt%的最佳短碳纤维（SCF）载荷，使3d打印复合材料的抗拉强度达到804.2 MPa。这种卓越的性能归功于独特的螺杆挤出工艺，它促进了高效的原位纤维浸渍和沉积，为制造大型高强度复合材料结构提供了一种有前途的、低成本的、灵活的途径。

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引用次数: 0

Reinforcement learning for real-time control of Resin Transfer Molding: Bridging simulation and experiments 树脂传递成型实时控制的强化学习：桥接仿真与实验

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2026-03-01 Epub Date: 2025-12-19 DOI: 10.1016/j.compositesa.2025.109511

D. Mocerino , S. Fernández-León , J. Fernández-León , L. Baumela , C. González

Resin Transfer Moulding (RTM) is an out-of-autoclave process widely employed for the production of high-performance composite components. Achieving uniform and defect-free impregnation, however, remains challenging due to uncertainties in resin viscosity, reinforcement permeability, and other process disturbances that influence flow dynamics. In this work, we present a physics-informed Reinforcement Learning (RL) framework for real-time control of the injection pressure in RTM. The approach integrates a custom Level Set–Darcy simulation environment with a Deep Q-Network (DQN) agent, trained to regulate the inlet pressure and maintain a target resin front velocity under varying material and process conditions. Unlike prior studies requiring full visual access to the flow front, the agent relies exclusively on feedback from four pressure sensors distributed along the mould, enhancing its applicability to industrial settings. The RL agent was initially trained in silico using stochastic permeability fields and viscosity variations derived from synthetic data, fostering robust and resilient control strategies. The learned policy was subsequently deployed on a laboratory-scale RTM setup for experimental validation. Results demonstrate that the RL controller successfully preserves the desired filling velocity, compensates for unanticipated variations in resin viscosity and fabric permeability, and accurately reproduces the intended impregnation dynamics. This study highlights the potential of closed-loop adaptive pressure control in RTM using Reinforcement Learning, illustrating its capability to handle process variability. The proposed framework can be further extended to more complex geometries, multi-gate injection systems, and other composite manufacturing processes.

树脂传递模塑（RTM）是一种非高压灭菌工艺，广泛应用于高性能复合材料部件的生产。然而，由于树脂粘度、增强剂渗透性和其他影响流动动力学的工艺干扰的不确定性，实现均匀和无缺陷的浸渍仍然具有挑战性。在这项工作中，我们提出了一个物理信息强化学习（RL）框架，用于实时控制RTM中的注入压力。该方法将定制的Level Set-Darcy模拟环境与Deep Q-Network （DQN）代理集成在一起，经过训练，可以在不同的材料和工艺条件下调节进口压力并保持目标树脂前速度。与之前的研究不同，该试剂完全依赖于分布在模具上的四个压力传感器的反馈，增强了其在工业环境中的适用性。RL药剂最初是在计算机上进行训练的，使用的是来自合成数据的随机渗透率场和粘度变化，从而形成了鲁棒性和弹性的控制策略。随后将学习到的策略部署在实验室规模的RTM设置上进行实验验证。结果表明，RL控制器成功地保持了所需的填充速度，补偿了树脂粘度和织物渗透率的意外变化，并准确地再现了预期的浸渍动态。本研究强调了使用强化学习在RTM中进行闭环自适应压力控制的潜力，说明了其处理过程可变性的能力。所提出的框架可以进一步扩展到更复杂的几何形状，多浇口注射系统和其他复合制造工艺。

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引用次数: 0

Energy-based modeling and experimental study on the characteristics of CFRP hole-making by the hybrid of laser and gas-waterjet with different scanning modes 基于能量的激光-气-水混合扫描模式下CFRP制孔特性建模与实验研究

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2026-03-01 Epub Date: 2025-12-11 DOI: 10.1016/j.compositesa.2025.109498

Boshen Yu , Xu Zhang , Jingrun Cai , Di Wu , Yanzhao Ma , Deng Li

The hybrid of laser and gas-waterjet (HLGW) is an efficient method for processing microchannels and holes in CFRP laminates, but most existing studies have primarily focused on process parameter optimization. To improve the hole quality, this study investigated the effects of different scanning strategies, scanning speeds, and waterjet impact angles. Hole quality was evaluated by heat affected zone (HAZ) area, taper, micromorphology, and surface roughness. Furthermore, a predictive model for CFRP removal based on laser energy and waterjet kinetic energy was developed to provide a theoretical basis for understanding the HLGW mechanism. The results show that increasing the waterjet impact angle reduces the HAZ area at the hole entrance for both Concentric Scanning Mode (CSM) and Spiral Scanning Mode (SSM). The SSM-1 strategy results in the smallest HAZ area at both the hole entrance and exit. The surface roughness achieved with SSM is superior to that obtained with CSM, with R_q and R_z reduced by 10.69 % and 19.95 %, respectively. The SSM has a larger taper than the CSM, with a maximum increase of 22.16%. An inside-to-outside movement sequence effectively mitigates waterjet erosion on the hole sidewall. The surface produced by CSM contains significantly more micro-defects than that generated by the SSM. The SSM-1 scanning strategy provides the optimal hole sidewall quality.

激光与气体水射流混合（HLGW）是一种加工CFRP复合材料微通道和微孔的有效方法，但现有的研究大多集中在工艺参数的优化上。为了提高井眼质量，研究了不同扫描策略、扫描速度和水射流冲击角度对井眼质量的影响。通过热影响区（HAZ）面积、锥度、微观形貌和表面粗糙度来评价孔质量。此外，建立了基于激光能量和水射流动能的CFRP去除预测模型，为理解HLGW机理提供了理论基础。结果表明：增大水射流冲击角，无论对同心扫描模式还是螺旋扫描模式，都能减小孔入口处的热影响区面积；SSM-1策略在洞口和洞口的HAZ面积最小。SSM的表面粗糙度优于CSM， Rq和Rz分别降低了10.69%和19.95%。SSM比CSM有更大的锥度，最大增加22.16%。从内到外的运动序列有效地减轻了水射流对井侧壁的侵蚀。CSM产生的表面微缺陷明显多于SSM产生的表面微缺陷。SSM-1扫描策略提供了最佳的井侧壁质量。

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引用次数: 0

Ablation behavior of the high-silica/phenolic pyramidal lattice-reinforced silicone rubber composites 高硅/酚醛锥体晶格增强硅橡胶复合材料的烧蚀行为

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2026-03-01 Epub Date: 2025-12-11 DOI: 10.1016/j.compositesa.2025.109507

Peixin Yang , Te Ma , Wu Yuan , Hongwei Song

Lattice structures are promising for enhancing the thermo-mechanical performance of composites under extreme conditions. This study systematically investigated the ablation behavior of high-silica/phenolic pyramidal lattice-reinforced silicone rubber composites under an oxyacetylene flame. A novel vertical weaving method reduced lattice fabrication time by 67 %. Microstructural and compositional analyses revealed a gradient pyrolysis-carbonization mechanism, incorporated into a theoretical model. The developed voxel-based numerical model characterizes the effects of lattice topology and material parameters on ablation performance. The lattice provides three key reinforcement mechanisms including bidirectional thermal regulation through radial and thickness-direction heat transfer, structural integrity enhancement via char layer reinforcement, and multi-directional load resistance against aerodynamic stresses. Experimental results show that reducing the lattice relative density lowers backside temperature but increases mass loss. Parametric sensitivity analysis demonstrates that optimal lattice design with smaller rod diameters, lower inclination angles, and longer rods further enhances thermal protection. These findings provide crucial guidance for the multi-scale design and optimization of advanced thermal protection materials.

晶格结构在提高复合材料在极端条件下的热力学性能方面具有广阔的前景。本文系统地研究了高硅/酚醛锥体晶格增强硅橡胶复合材料在氧乙炔火焰下的烧蚀行为。一种新型的垂直编织方法使晶格制作时间缩短了67%。微观结构和成分分析揭示了梯度热解-碳化机理，并纳入了理论模型。所建立的基于体素的数值模型表征了晶格拓扑结构和材料参数对烧蚀性能的影响。晶格提供了三种关键的加固机制，包括通过径向和厚度方向传热进行双向热调节，通过炭层加固增强结构完整性，以及针对气动应力的多向负载抵抗。实验结果表明，降低晶格相对密度会降低背面温度，但会增加质量损失。参数敏感性分析表明，采用更小的杆径、更低的倾角和更长的杆，优化栅格设计可以进一步增强热防护能力。这些发现为先进热防护材料的多尺度设计和优化提供了重要的指导。

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引用次数: 0

Investigation of the flexural performance and damage process of 3D printed beams 3D打印梁的抗弯性能及损伤过程研究

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2026-03-01 Epub Date: 2025-12-15 DOI: 10.1016/j.compositesa.2025.109517

Siyuan Wu , Zhongde Shan , Ken Chen , Shaozong Wang , Congze Fan , Xiaojun Liu , Zhifeng Zhang , Jianxin Xiao

Short fiber reinforced resin beams (SFRRBs), continuous fiber reinforced resin beams (CFRRBs) and hybrid printing beam structures were produced using 3D printing, innovatively. The influence of printing speed and temperature on the flexural strength and modulus was examined and compared. Furthermore, the flexural damage process was examined by acoustic emission (AE) technology, and the feature signals were clustered utilizing principal component analysis(PCA)and the K-means++ algorithm. The results indicate that printing temperature and speed have a significant impact on the flexural performance, and when the printing temperature was set at 220°C and the printing speeds were 5 mm/s and 1.5 mm/s, the maximum flexural strength and modulus of SFRRBs reached 82.34 MPa and 4.07 GPa, respectively, while those of CFRRBs reached 235.12 MPa and 15.12 GPa; The flexural strength and modulus of the interlaminar hybrid printing beam structures could achieve 203.31 MPa and 18.91 GPa, with the maximum improvements by 18.20 % and 25.01 %, as the small layer short fiber reinforced resin establishes a more robust bonding interface and diminishes the overall porosity; The flexural damage of CFRRBs and SFRRBs was classified into five types. In comparison to 0 mm rib CFRRBs, 10 mm rib CFRRBs have a greater average energy and duration of AE signal; In comparison to 10 mm rib CFRRB, the average AE energy of 10 mm rib SFRRB is diminished, however, the average duration is extended. The research provides more feasibility for the application of 3D printing in the field of engineering.

创新地利用3D打印技术制造了短纤维增强树脂梁（SFRRBs）、连续纤维增强树脂梁（CFRRBs）和混合打印梁结构。考察和比较了印刷速度和温度对材料抗弯强度和模量的影响。利用声发射（AE）技术对弯曲损伤过程进行检测，并利用主成分分析（PCA）和k -means++算法对特征信号进行聚类。结果表明：打印温度和打印速度对材料抗弯性能有显著影响，当打印温度为220℃，打印速度为5 mm/s和1.5 mm/s时，SFRRBs的最大抗弯强度和模量分别达到82.34 MPa和4.07 GPa， CFRRBs的最大抗弯强度和模量分别达到235.12 MPa和15.12 GPa；层间混合打印梁结构的抗折强度和模量分别达到203.31 MPa和18.91 GPa，最大提升幅度分别为18.20%和25.01%，这是由于小层短纤维增强树脂建立了更牢固的结合界面，减小了整体孔隙率；将CFRRBs和SFRRBs的弯曲损伤分为5种类型。与0 mm肋cfrcb相比，10 mm肋cfrcb具有更大的声发射信号平均能量和持续时间；与10 mm肋CFRRB相比，10 mm肋SFRRB的平均声发射能量降低，但平均持续时间延长。该研究为3D打印技术在工程领域的应用提供了更多的可行性。

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引用次数: 0

Harnessing scaffold architecture to improve mycelium growth and performance in biodegradable composites 利用支架结构改善菌丝体生长和可生物降解复合材料的性能

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2026-03-01 Epub Date: 2025-12-01 DOI: 10.1016/j.compositesa.2025.109474

Deepak Sharma , Hortense Le Ferrand

Mycelium-bound composites (MBCs) are bio-based materials manufactured by growing fungal mycelium within organic substrates, serving as biodegradable and functional alternatives to conventional polymers and foams. Limited oxygen availability within thick, loosely packed organic substrates affects uniform mycelium growth, as oxygen diffusion decreases with thickness, resulting in low performance of the MBCs. Designing a porous organic scaffold as a substrate could help grow homogeneously dense mycelium throughout the composite by enabling adequate air flow. In this study, the mycelium of Ganoderma lucidum was grown on 3D-printed triply periodic minimal surface scaffolds made of a wood-polylactic acid (wood-PLA) composite, which were dip-coated with a thin layer of peptone-malt-agar (PMA) solution. The growth of the mycelium and the resulting yield strength and thermal insulation improvements of the scaffolds were studied for three sheet- and strut-triply periodic minimal surface (TPMS) porous scaffolds. At equal nominal porosity, the mycelium was found to grow much better on sheet-TPMS than on strut-TPMS scaffolds. The best sheet scaffold achieved a yield strength of 4.89 MPa, representing a 48.18 % improvement over the control scaffold (scaffold without PMA coating). Similarly, the best sheet scaffold exhibits a 43.1 % improvement in thermal insulation compared to control scaffolds after 21 days of growth. The MBCs effectively maintained an average low surface temperature of 65 °C under extreme thermal conditions (285 °C) and exhibited strong infrared shielding capabilities, highlighting their potential for thermal insulation and stealth applications. The current work demonstrates how scaffold design can tailor the growth of mycelium and opens a new avenue for increasing the strength and thermal insulation of wood-PLA composites.

菌丝结合复合材料（MBCs）是通过在有机基质中生长真菌菌丝而制成的生物基材料，是传统聚合物和泡沫的可生物降解和功能性替代品。在厚而松散的有机基质中，氧气的可用性有限，影响了菌丝的均匀生长，因为氧气的扩散随着厚度的增加而减少，导致MBCs的性能低下。设计一种多孔有机支架作为基底，通过保证充足的空气流动，可以帮助在整个复合材料中生长均匀致密的菌丝体。在这项研究中，灵芝菌丝体生长在3d打印的三周期最小表面支架上，支架由木材-聚乳酸（wood-PLA）复合材料制成，并用一层薄薄的肽-麦芽-琼脂（PMA）溶液浸渍。研究了三种片状和三柱三周期最小表面多孔材料（TPMS）的菌丝生长、屈服强度和保温性能的改善。在相同孔隙率下，菌丝体在片状tpms上比在支架上生长得更好。最佳薄片支架的屈服强度达到4.89 MPa，比对照支架（不涂PMA涂层的支架）提高48.18%。同样，生长21天后，与对照支架相比，最佳薄片支架的隔热性能提高了43.1%。MBCs在极端热条件下（285°C）可有效保持65°C的平均低表面温度，并表现出强大的红外屏蔽能力，突出了其隔热和隐身应用的潜力。目前的工作证明了支架设计如何能够定制菌丝体的生长，并为增加木材- pla复合材料的强度和隔热开辟了新的途径。

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引用次数: 0

Bio-inspired gradient-heterogeneous Al/Al2O3 composites: Strength–toughness synergistic design and fracture mechanisms 仿生梯度非均相Al/Al2O3复合材料：强度-韧性协同设计和断裂机制

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2026-03-01 Epub Date: 2025-11-25 DOI: 10.1016/j.compositesa.2025.109467

Tian-Hao Xu , Xiang-Yu Meng , Song Shen , Guo-Chao Mo , Ping Shen

Inspired by natural hierarchical structures, this study presents a novel biomimetic Al/Al₂O₃ composite featuring a gradient-heterogeneous architecture that effectively addresses the long-standing strength–toughness trade-off in metal–ceramic systems. A high-resolution vat photopolymerization 3D printing process was used to fabricate complex ceramic scaffolds with a multi-scale design, incorporating a turtle shell-inspired gradient in porosity and wall thickness, along with layered, tubular, and hexagonal cellular units derived respectively from nacre, ram horns, and beehives. Through pressure infiltration of molten aluminum, a fully interpenetrating composite with strong interfacial bonding was achieved. The resulting material exhibits a spatially tailored gradient in mechanical properties, achieving a surface strength of 634 MPa and a core energy absorption capacity of 14.36 MJ/cm³. In situ mechanical testing and finite element analysis reveal that multi-scale synergistic toughening mechanisms—including architecture-guided crack deflection, distributed plastic deformation, and stress redistribution—collectively contribute to the enhanced performance. This work demonstrates the potential of additive manufacturing-enabled structural programming to engineer composites with spatially optimized mechanical properties, offering a new paradigm for the design of advanced structural materials.

受自然分层结构的启发，本研究提出了一种新型仿生Al/Al2O3复合材料，具有梯度非均质结构，有效解决了金属陶瓷系统中长期存在的强度-韧性权衡问题。高分辨率的大桶光聚合3D打印工艺用于制造具有多尺度设计的复杂陶瓷支架，结合了龟壳启发的孔隙度和壁厚梯度，以及分别来自珍珠层，公羊角和蜂箱的层状，管状和六边形细胞单位。通过铝液的压力渗透，获得了具有强界面结合力的全互渗复合材料。所得材料的力学性能呈现出空间梯度，表面强度为634 MPa，核心吸能能力为14.36 MJ/cm3。原位力学试验和有限元分析表明，多尺度协同增韧机制——包括结构导向裂纹挠曲、分布塑性变形和应力重分布——共同促进了性能的提高。这项工作证明了增材制造结构编程在设计具有空间优化机械性能的复合材料方面的潜力，为先进结构材料的设计提供了新的范例。

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引用次数: 0

Improving bioactivity of poly(lactic acid) by incorporating pH-neutral bioactive glass 通过加入ph中性生物活性玻璃提高聚乳酸的生物活性

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2026-03-01 Epub Date: 2025-11-25 DOI: 10.1016/j.compositesa.2025.109466

Aamna Qamar , Jian Liu , Yankun Gong , Ailing Li , Dong Qiu

Poly(lactic acid) (PLA) is a representative bioresorbable and biocompatible polyester, which has been used in many clinic applications, for examples, artificial bones and internal fixation screws; however, its inherent bio-inertness has limited the therapeutic outcomes. In this article, bioactive glasses (BGs) were incorporated into PLA via melt compounding to enhance its bioactivity. It was found that the high basicity of conventional BGs (45S5 as the representative) severely degraded PLA chains during thermal processing, causing obvious decrease in PLA composites mechanical properties. Instead, the pH-neutral BG, a phosphosilicate calcium glass (denoted as PSC, with the composition of 10.8 %P₂O₅-54.2 %SiO₂-35.0 %CaO, mol%), showed no deterioration of PLA chains, in terms of molecular weight, etc., therefore retained the good mechanical property of PLA composites. The 10 % mPSC/PLA showed improved mechanical performance, with tensile strengths of 52.2 ± 2.8 MPa, compared to 44.2 ± 2.8 MPa of pure PLA. Furthermore, the composites exhibited enhanced bioactivity and biocompatibility, e.g., 10 % mPSC/PLA showed nearly 6 times improvement in cell adhesion (based on the cell spreading area) than pure PLA. This study highlights the importance of acid-base property on the compatibility between polyesters and inorganic fillers, and has identified PSC as a promising bioactive filler to develop better polyester-based biomedical materials.

聚乳酸（PLA）是一种具有代表性的生物可吸收性和生物相容性的聚酯，已在许多临床应用中得到应用，例如人造骨和内固定螺钉；然而，其固有的生物惰性限制了其治疗效果。本文采用熔融复合的方法，将生物活性玻璃（BGs）掺入PLA中，以提高PLA的生物活性。研究发现，常规BGs（以45S5为代表）的高碱度在热加工过程中严重降解PLA链，导致PLA复合材料力学性能明显下降。相反，ph中性的BG，一种磷硅酸盐钙玻璃（记为PSC，组成为10.8% p2o5 - 54.2% sio2 - 35.0% CaO, mol%），在分子量等方面没有表现出PLA链的劣化，因此保留了PLA复合材料的良好力学性能。10% mPSC/PLA的力学性能得到改善，拉伸强度为52.2±2.8 MPa，而纯PLA为44.2±2.8 MPa。此外，复合材料表现出增强的生物活性和生物相容性，例如，10% mPSC/PLA的细胞粘附性（基于细胞扩散面积）比纯PLA提高了近6倍。本研究强调了酸碱性质对聚酯与无机填料之间相容性的重要性，并确定PSC是一种有前景的生物活性填料，可以开发更好的聚酯基生物医用材料。

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引用次数: 0

Preparation and performance research of PDLC films with low haze and high UV resistance 低雾度高抗紫外线PDLC薄膜的制备及性能研究

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2026-03-01 Epub Date: 2025-12-15 DOI: 10.1016/j.compositesa.2025.109516

Jianjun Xu

In this paper, a low haze and high stability polymer dispersed liquid crystal (PDLC) film was prepared by using a new type of fully hydrogenated styrene-butadiene copolymer (HSBC) as the substrate. The results show that, by replacing the traditional commercial PET film with HSBC film, the on-state haze of the PDLC film prepared is reduced by 36 %, and the on-state transmittance is increased by 4 %. After 800 cycles of switching off, the electro-optical performance changes minimally, and simultaneously, PDLC films showed high stability, with no significant changes in light transmittance before and after 200 h of irradiation in the UV aging box. When the acrylate crosslinking agent with moderate chain length (PEGDA400) is used, the prepared films have excellent electro-optic and temperature domain comprehensive properties, with a fast decay time of 4.8 s at −30℃ and a high contrast ratio of 38 at 100 ℃, and this film has a good viewing angle and cycling stability. By using HSBC film instead of PET film, it has a reference significance for further improving the comprehensive performance of PDLC.

本文以一种新型的全氢化丁苯共聚物（HSBC）为衬底，制备了低雾度、高稳定性的聚合物分散液晶（PDLC）薄膜。结果表明，用HSBC薄膜代替传统商用PET薄膜，制备的PDLC薄膜的导态雾度降低了36%，导态透过率提高了4%。经过800次关机循环后，PDLC薄膜的电光性能变化最小，同时薄膜稳定性高，在UV老化箱中辐照200 h前后透光率无明显变化。当使用中等链长丙烯酸酯交联剂（PEGDA400）时，制备的薄膜具有优异的电光和温度域综合性能，在−30℃下快速衰减时间为4.8 s，在100℃下对比度高达38，并且该薄膜具有良好的视角和循环稳定性。采用HSBC薄膜代替PET薄膜，对进一步提高PDLC的综合性能具有借鉴意义。

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