Advanced Industrial and Engineering Polymer Research最新文献_第4页

Rapid prediction of poly(butylene adipate-co-terephthalate)/poly(glycolic acid) (PBAT/PGA) agricultural films based on UV-accelerated aging tests with applicability to the environment 基于环境适应性紫外加速老化试验的聚己二酸丁二酯/聚乙二醇酸（PBAT/PGA）农用薄膜的快速预测

IF 9.9 Q1 MATERIALS SCIENCE, COMPOSITES

Advanced Industrial and Engineering Polymer Research

Pub Date : 2025-07-01 DOI: 10.1016/j.aiepr.2025.06.002

Zihan Jia , Minglong Li , Bo Wang , Dongsheng Li , Peng Guo , Mingfu Lyu , Zhiyong Wei , Lin Sang

Biodegradable plastic mulches (BPMs) possess great possibility as alternative materials for traditional non-degradable agricultural films. However, research on the degradation behaviors of biodegradable films remains relatively nascent, which is a crucial determinant in applications. Ultraviolet accelerated aging method offers an effective approach to simulate the outdoor or field degradation in a shortened period. In this research, poly(butylene adipate-co-terephthalate)/poly(glycolic acid) (PBAT/PGA) films were prepared and subjected to UV-accelerated degradation (UAD) and natural environmental degradation (NED). The variation of performance parameters including haze, transmittance, tensile strength, elongation at break and melting temperature were monitored at varying degradation intervals. Due to the UV-accelerated aging experimental conditions were well matched with natural environmental factors, the data derived from UAD and NED were highly correlated, indicating the feasibility of predicting film properties based on the UAD test. Random forest algorithm displayed superior stability and high accuracy in constructing degradation prediction model, achieving R² of 0.984 and 0.979 for training and test sets, respectively. Equations derived from this model demonstrated the mapping between NED days and UAD days, which facilitated a rapid evaluation of film out-door performance by indoor UV-accelerated aging tests. Machine learning provides a novel and efficient approach for constructing degradation prediction models, which can enhance the adoption of biodegradable films and thus contribute to addressing the plastic pollution problems in agriculture.

生物降解地膜作为传统农用不可降解地膜的替代材料具有很大的可能性。然而，对生物可降解薄膜的降解行为的研究仍处于起步阶段，这是决定其应用的关键因素。紫外加速老化方法为模拟材料在室外或田间较短时间内的老化提供了有效的方法。本研究制备了聚己二酸丁二酯/聚乙二醇酸（PBAT/PGA）薄膜，并对其进行了紫外加速降解（UAD）和自然环境降解（NED）。在不同的降解间隔下，监测了雾度、透光率、抗拉强度、断裂伸长率和熔化温度等性能参数的变化。由于uv加速老化实验条件与自然环境因素匹配较好，UAD和NED得到的数据高度相关，说明基于UAD试验预测薄膜性能的可行性。随机森林算法在构建退化预测模型时表现出较好的稳定性和较高的准确性，在训练集和测试集上的R2分别达到0.984和0.979。由该模型导出的方程显示了NED天数与UAD天数之间的映射关系，从而便于通过室内uv加速老化试验快速评估薄膜的室外性能。机器学习为构建降解预测模型提供了一种新颖有效的方法，可以提高生物降解膜的采用，从而有助于解决农业中的塑料污染问题。

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引用次数: 0

Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) biodegradation by a novel thermophilic Actinomadura sp. SCN-SB with microbial upcycling potential 聚（3-羟基丁酸酯-co-3-羟戊酸酯）在具有微生物升级循环潜力的新型嗜热性放线菌SCN-SB的生物降解

IF 9.9 Q1 MATERIALS SCIENCE, COMPOSITES

Advanced Industrial and Engineering Polymer Research

Pub Date : 2025-07-01 DOI: 10.1016/j.aiepr.2025.05.002

Natthaphat Phothong , Siritouch Bhamarasuta , Shiho Morikane , Hiroya Tomita , Kohsuke Honda , Suchada Chanprateep Napathorn

Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) is a biodegradable and biocompatible biopolymer with promising applications in food packaging and biomedical fields. However, its degradation under uncontrolled composting conditions remains relatively slow. To address this limitation, this study aimed to isolate and characterize thermophilic bacteria capable of producing extracellular hydrolytic enzymes involved in PHBV degradation. A total of 131 bacterial strains were isolated from soil samples, among which isolate 93 showed the highest PHBV-degrading activity on agar plates. Based on 16S rRNA gene sequencing, isolate 93 shared 98.19 % similarity with Actinomadura adrarensis ACD12. Whole-genome analysis revealed closer relatedness to A. vinacea JCM 3325, with digital DNA–DNA hybridization (dDDH) and average nucleotide identity (ANIb) values of 25.40 % and 80.07 %, respectively, suggesting that isolate 93 is a novel species, designated Actinomadura sp. SCN-SB. Gene annotation confirmed the presence of extracellular short-chain-length PHA (scl-PHA) depolymerase genes. Functional assays demonstrated a maximum clear zone of 28.0 ± 2.9 mm on PHBV agar plates at 50 °C and a 50.4 ± 4.7 % weight loss of PHBV films in submerged cultivation. Higher degradation rates were observed in YP medium compared to MSM, regardless of the C/N ratio. The crude scl-PHA depolymerase, purified via 80 % ammonium sulfate precipitation, exhibited optimal activity (0.27 ± 0.01 U/mL) at pH 9.0 and 50 °C. These findings identify Actinomadura sp. SCN-SB as a novel thermophilic bacterium with significant potential for enzymatic PHBV degradation, biological recycling, and upcycling in high-temperature composting and landfill conditions.

聚（3-羟基丁酸酯-co-3-羟基戊酸酯）（PHBV）是一种可生物降解和生物相容性好的生物聚合物，在食品包装和生物医学领域具有广阔的应用前景。然而，在不受控制的堆肥条件下，其降解仍然相对缓慢。为了解决这一限制，本研究旨在分离和表征能够产生参与PHBV降解的细胞外水解酶的嗜热细菌。从土壤样品中分离到131株细菌，其中93株在琼脂平板上对phbv的降解活性最高。基于16S rRNA基因测序，分离株93与adrarensis ACD12的相似性为98.19%。全基因组分析结果显示，该菌株与a . vinacea JCM 3325亲缘关系较近，dDDH和ANIb值分别为25.40%和80.07%，表明该菌株为新种，命名为Actinomadura sp. SCN-SB。基因注释证实了细胞外短链长度PHA （scll -PHA）解聚合酶基因的存在。功能分析表明，在50°C时，PHBV琼脂板上的最大透明区为28.0±2.9 mm， PHBV膜在潜水培养中重量减轻50.4±4.7%。无论C/N比如何，YP培养基中的降解率都高于MSM。经80%硫酸铵沉淀纯化的粗酶在pH 9.0和50℃条件下的活性为0.27±0.01 U/mL。这些发现表明，Actinomadura sp. SCN-SB是一种新型的嗜热细菌，在高温堆肥和垃圾填埋场条件下具有酶降解PHBV、生物回收和升级再利用的巨大潜力。

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引用次数: 0

Mechanically strong, stretchable and self-healable silicone elastomers with designed dynamic networks for exceptional self-adhesion under harsh conditions 机械强度强，可拉伸和自修复的有机硅弹性体，设计动态网络，在恶劣条件下具有卓越的自粘附性

IF 9.9 Q1 MATERIALS SCIENCE, COMPOSITES

Advanced Industrial and Engineering Polymer Research

Pub Date : 2025-07-01 DOI: 10.1016/j.aiepr.2025.05.003

Shuai-Chi Liu , Yu-Tong Li , Yu-Qing Qin , Ling Yang , Meng-Ying Liu , Ji Liu , Yang Li , Cheng-Fei Cao , Li-Xiu Gong , Shi-Neng Li , Guo-Dong Zhang , Long-Cheng Tang

Silicone elastomers with wide-temperature stability and excellent mechanical flexibility have attracted considerable interest in both academic and industrial fields. However, the highly cross-linked networks cannot self-heal and usually show poor adhesion to other substrates, limiting their sustainable applications in emerging fields. Developing self-adhesive organosilicon elastomers with high mechanical strength, superior stretchability, and exceptional self-healing performance remains a significant challenge. Herein, we propose a facile method to synthesize self-adhesive organosilicon elastomers with high mechanical strength, flexibility, and self-healing performance by designing dynamic networks. Specifically, multiple reversible physical and chemical bonds, such as disulfide bonds, hydrogen bonds, and Zn²⁺ coordination bonds, are integrated into the organosilicon chains via click reactions, carboxylic acid-amine condensation, and ionic coordination. The optimized organosilicon elastomers exhibit exceptional stretchability and mechanical properties, including an elongation at break of ∼5600 %, high strength (2.2 MPa), and toughness (54.38 MJ/m³), outperforming traditional organosilicon elastomers. Additionally, the as-prepared elastomers demonstrate remarkable self-healing ability, with 80–93 % healing efficiency at 25–60 ^oC, and excellent self-adhesion to various substrates (0.3–1.0 MPa on aluminum, steel, and wood). These properties are maintained under harsh conditions, including low temperature (−10 ^oC), saltwater, and organic solvents. Clearly, the organosilicon elastomers developed in this work hold significant potential as green and sustainable candidates for various self-adhesive applications.

硅酮弹性体具有宽温稳定性和优异的机械柔韧性，引起了学术界和工业界的广泛关注。然而，高度交联的网络不能自愈，通常与其他基材的附着力较差，限制了它们在新兴领域的可持续应用。开发具有高机械强度、优异拉伸性和优异自愈性能的自粘有机硅弹性体仍然是一个重大挑战。在此，我们提出了一种简单的方法，通过设计动态网络来合成具有高机械强度，柔韧性和自愈性能的自粘有机硅弹性体。具体来说，通过点击反应、羧酸-胺缩合和离子配位，有机硅链中集成了多种可逆的物理化学键，如二硫键、氢键和Zn2+配位键。优化后的有机硅弹性体具有优异的拉伸性和机械性能，包括断裂伸长率为~ 5600%，高强度（2.2 MPa）和韧性（54.38 MJ/m3），优于传统的有机硅弹性体。此外，制备的弹性体表现出显著的自修复能力，在25-60℃下具有80 - 93%的愈合效率，并且对各种基材（铝，钢和木材上的0.3-1.0 MPa）具有良好的自粘附性。这些性能在恶劣的条件下也能保持，包括低温（- 10℃）、盐水和有机溶剂。显然，在这项工作中开发的有机硅弹性体作为各种自粘应用的绿色和可持续候选材料具有巨大的潜力。

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引用次数: 0

Highly thermally conductive and insulating aramid/polyphenylene sulfide composite paper with gradient and sandwich structures 具有梯度和夹层结构的高导热绝缘芳纶/聚苯硫醚复合纸

IF 9.9 Q1 MATERIALS SCIENCE, COMPOSITES

Advanced Industrial and Engineering Polymer Research

Pub Date : 2025-07-01 DOI: 10.1016/j.aiepr.2025.05.005

Qianshun Zhang , Wenzhuo Wu , Wenqi Zheng , Qi Huang , Zhanyu Zhou , Junpeng Wang , Xuerui Xiao , Hua Wang , Siwei Xiong , Luoxin Wang , Shiwen Yang

With rapid industrial development, effective thermal management has become essential for modern insulating materials. However, conventional aramid paper-based materials face substantial challenges in meeting these evolving demands due to their low thermal conductivity. This study demonstrates a novel fabrication method combining natural sedimentation filtration and thermal lamination to integrate hexagonal boron nitride (h-BN) into aramid/polyphenylene sulfide (PPS) composite paper, resulting in high thermal conductivity insulating aramid composite paper with a gradient structure and sandwich structure. At 60 wt% h-BN loading, the composite exhibits remarkable through-plane thermal conductivity (0.461 W/mK) and breakdown strength (40.96 kV/mm). These values show 255 % and 31.8 % improvements, respectively, over the h-BN-free control sample prepared under identical conditions. The thermal conductivity network formed by h-BN significantly enhances the TC of the composite. The exterior PPS film layer of the sandwich structure substantially augments the composite paper's resilience against thermal stress, chemical corrosion, and electromagnetic radiation. This enhanced durability renders the material highly promising for applications in various domains, including but not limited to electronics and electrical engineering.

随着工业的快速发展，有效的热管理已成为现代绝缘材料的必要条件。然而，传统芳纶纸基材料由于其低导热性，在满足这些不断变化的需求方面面临着巨大的挑战。本研究提出了一种结合自然沉降过滤和热层压的新型制备方法，将六方氮化硼（h-BN）集成到芳纶/聚苯硫醚（PPS）复合纸中，得到具有梯度结构和夹心结构的高导热绝缘芳纶复合纸。在60 wt%的h-BN载荷下，复合材料表现出显著的通平面导热系数（0.461 W/mK）和击穿强度（40.96 kV/mm）。这些值分别比在相同条件下制备的不含h- bn的对照样品提高了255%和31.8%。h-BN形成的导热网络显著提高了复合材料的TC。夹层结构的外部PPS膜层大大增强了复合纸对热应力、化学腐蚀和电磁辐射的弹性。这种增强的耐用性使材料在各种领域的应用前景非常广阔，包括但不限于电子和电气工程。

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引用次数: 0

High-pressure hydrogen effects on thermoplastics: A comprehensive review of permeation, decompression failure, and mechanical properties 高压氢对热塑性塑料的影响：渗透、减压失效和机械性能的综合综述

IF 9.9 Q1 MATERIALS SCIENCE, COMPOSITES

Advanced Industrial and Engineering Polymer Research

Pub Date : 2025-07-01 DOI: 10.1016/j.aiepr.2025.05.001

Jiacheng Zhao , Guozhen Ding , Peng Feng , Chao Wu

Hydrogen energy is widely regarded as a clean and sustainable alternative to fossil fuel. Among various hydrogen storage options, high-pressure gas cylinders, especially Type IV composite cylinders, are increasingly used due to their light weight and high storage efficiency. Since the thermoplastic liner plays a significant role as a permeation barrier of the total cylinder, the current research findings and gaps related to its properties under high-pressure hydrogen environments are reviewed. Firstly, the potential thermoplastics and processing techniques of the liner are presented. Then, the review focuses on three key properties of thermoplastic liners including permeability, decompression failure and mechanical properties under high-pressure hydrogen environments. The mechanism and key influencing factors of these properties are systematically discussed, followed by the proposal of targeted and valuable improvement strategies. Moreover, testing and standards, quantification and physical models of these three properties are also outlined to provide guidance and reference for future research and applications. In the end, the research gaps and future perspectives related to the thermoplastic liner are identified. This review provides a valuable reference for the performance optimization and engineering application of the thermoplastic liners of Type IV cylinders.

氢能被广泛认为是一种清洁、可持续的化石燃料替代品。在各种储氢选择中，高压气瓶，特别是IV型复合气瓶，由于其重量轻，储氢效率高，越来越多地被使用。由于热塑性衬垫在整个气瓶的渗透屏障中起着重要的作用，本文综述了目前热塑性衬垫在高压氢环境下性能的研究成果和存在的不足。首先，介绍了衬里的潜在热塑性塑料和加工技术。然后，重点介绍了热塑性衬垫在高压氢气环境下的渗透性、减压失效和力学性能等三个关键性能。系统探讨了这些性能的机理和关键影响因素，并提出了有针对性和有价值的改进策略。并概述了这三种性质的测试标准、量化和物理模型，为今后的研究和应用提供指导和参考。最后，指出了热塑性衬垫的研究空白和未来的发展方向。为IV型气缸热塑性衬垫的性能优化和工程应用提供了有价值的参考。

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引用次数: 0

Triethylenetetramine-modified ammonium polyphosphate as charring agent for enhanced flame retardancy in ethylene vinyl acetate copolymer 三乙基四胺改性聚磷酸铵增炭剂对乙烯-醋酸乙烯共聚物阻燃性能的增强

IF 9.9 Q1 MATERIALS SCIENCE, COMPOSITES

Advanced Industrial and Engineering Polymer Research

Pub Date : 2025-07-01 DOI: 10.1016/j.aiepr.2025.05.004

Yi-Song Wang , Wen Ye , Yan Jiang , De-Yi Wang

In this study, a novel charring agent (TETA-APP) was prepared via ion exchange reaction between triethylenetetramine (TETA) and ammonium polyphosphate (APP). It was characterized by fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy analysis (SEM), X-ray photoelectron analysis (XPS), and X-ray diffraction analysis (XRD), etc. Furthermore, the obtained TETA-APP was blended with APP to act as flame retardant in ethylene vinyl acetate copolymer (EVA), and the comprehensive properties of the composites were tested. Compared with IFR@EVA-1 (30 wt% APP in EVA), IFR@EVA-3 with 15 wt% TETA-APP and 15 wt% APP in EVA resin resulting in 32.1 % of limiting oxygen index (LOI) and V-0 grade of vertical burning test (UL-94), and showed a significant decrease in both the values of pHRR (reduced by 54.5 %) and SPR (reduced by 46.0 %) in cone calorimetric (CC) analysis. These results demonstrated that TETA-APP performed obviously synergistic effect in APP/EVA system. Then thermogravimetric-infrared spectroscopy (TG-FTIR) and Raman spectroscopy were used to further investigate the flame-retardant mechanism. In gaseous phase, the degraded CO₂, NH₃ and H₂O acted as diluents reducing oxygen density, and the formed PO· performed quenching effect to capture free radicals. In condensed phase, a large number of -P-N-C-, -P-C- bonds produced by the decomposition of TETA-APP were helpful for forming a more stable char layer, which restricted the exchange of heat and flammable pyrolysates. Both the effects in gaseous and condensed phases were the principal reason for the much better flame retardancy in EVA resin.

本研究以三乙烯四胺（TETA）与聚磷酸铵（APP）为原料，通过离子交换反应制备了一种新型炭化剂TETA-APP。采用傅里叶变换红外光谱（FT-IR）、扫描电镜（SEM）、x射线光电子分析（XPS）、x射线衍射分析（XRD）等方法对其进行了表征。将得到的TETA-APP与APP共混，作为醋酸乙烯共聚物（EVA）的阻燃剂，并对复合材料的综合性能进行了测试。与IFR@EVA-1 （30 wt%的APP在EVA中）相比，IFR@EVA-3 （15 wt%的TETA-APP和15 wt%的APP在EVA树脂中）的极限氧指数（LOI）和V-0等级（UL-94）降低了32.1%，并且在锥量热（CC）分析中，pHRR值（降低54.5%）和SPR值（降低46.0%）均显著降低。结果表明，TETA-APP在APP/EVA体系中具有明显的协同效应。然后利用热重红外光谱（TG-FTIR）和拉曼光谱进一步研究了阻燃机理。在气相中，降解的CO2、NH3和H2O作为稀释剂降低氧密度，形成的PO·起到淬灭作用捕获自由基。在凝聚相中，TETA-APP分解产生大量的- p - n - c -、- p - c -键，有利于形成更稳定的炭层，限制了热交换和可燃热解物。气相和凝聚相的作用是EVA树脂具有较好阻燃性的主要原因。

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引用次数: 0

Constructing a biomass flame retardant for fire-safe, thermal management, and compressive strength application of polybutylene adipate terephthalate/ polylactic acid foams 构建用于防火、热管理和抗压强度应用的聚己二甲酸丁二酯/聚乳酸泡沫生物质阻燃剂

IF 9.9 Q1 MATERIALS SCIENCE, COMPOSITES

Advanced Industrial and Engineering Polymer Research

Pub Date : 2025-04-01 DOI: 10.1016/j.aiepr.2024.12.003

Xiansheng Hong , Yunlong Li , Yuying Zheng , Qian Li

Poly (butylene adipate-co-terephthalate) (PBAT) and polylactic acid (PLA) as a biodegradable thermoplastic material have been expected to replace traditional undegradable plastics. However, PBAT resins are highly flammable and have poor thermal stability and lower compressive strength performance. For enhancing PBAT compressive strength, thermal stability, and flame retardancy performance, polylactic acid (PLA) resin was used to mix with the PBAT matrix. Meanwhile, a biomass additive (PA@CS) was prepared through phytic acid (PA) solution as the grinding medium modifying cellulose (CS) particles by the ball milling process. As the PBAT/10PLA/PA@CS foam presented, PA@CS implanted into pore walls which supported the structure integrity of foams and presented the lowest surface temperature when heating at 170 °C for 180 s. The compressive strength of PBAT/10PLA/PA@CS foam with 5 wt% of PA@CS addition reached 1.05 MPa at 20 % strain. During the combustion process, PA@CS, as flame retardants, demonstrated excellent suppressing heat dispassion and fire-resistance performance. For instance, 5 wt% of PA@CS presented the highest ultimate oxygen index (LOI) (27.9 %), and UL-94 V-0 rating. In detail, 5 wt% of PA@CS also reduced the peak of heat release rate (PHRR) from 851.47 kW m⁻² to 524.45 kW m⁻² by 38 %, total heat release (THR) from 84.34 MJ m⁻² to 66.45 MJ m⁻² by 21 %. In this work, PA@CS as an efficient biomass flame retardant provided technical support for the development of high-performance compressive strength, thermal insulation, and flame retardancy PBAT/PLA foams.

聚己二酸丁二酯（PBAT）和聚乳酸（PLA）作为一种生物可降解的热塑性材料有望取代传统的不可降解塑料。然而，PBAT树脂高度易燃，热稳定性差，抗压强度较低。为了提高PBAT的抗压强度、热稳定性和阻燃性能，采用聚乳酸（PLA）树脂与PBAT基体混合。同时，以植酸（PA）溶液为研磨介质，采用球磨法对纤维素（CS）颗粒进行改性，制备了生物质添加剂（PA@CS）。当PBAT/10PLA/PA@CS泡沫出现时，PA@CS植入孔壁，支撑泡沫结构的完整性，在170℃加热180 s时，表面温度最低。当PA@CS添加量为5 wt%时，PBAT/10PLA/PA@CS泡沫在20%应变下的抗压强度达到1.05 MPa。在燃烧过程中，PA@CS作为阻燃剂表现出优异的抑热性能和耐火性能。例如，5 wt% PA@CS的最终氧指数（LOI）最高（27.9%），UL-94 V-0等级最高。5 wt%的PA@CS还使放热率峰值（PHRR）从851.47 kW m−2降低到524.45 kW m−2，降低38%，总放热率（THR）从84.34 MJ m−2降低到66.45 MJ m−2，降低21%。PA@CS作为一种高效的生物质阻燃剂，为开发高性能抗压、保温、阻燃的PBAT/PLA泡沫材料提供了技术支持。

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引用次数: 0

Graphene nanoplatelet induced microphase separation in poly(ether-block-amide)s 石墨烯纳米血小板诱导聚醚-嵌段酰胺微相分离

IF 9.9 Q1 MATERIALS SCIENCE, COMPOSITES

Advanced Industrial and Engineering Polymer Research

Pub Date : 2025-04-01 DOI: 10.1016/j.aiepr.2024.10.002

David Reinoso Arenas , Eimear Magee , Stephen Hodge , Les Bell , Tony McNally

The inclusion of graphene nanoplatelets (GNP) in segmented block copolymers offers a route to manipulate microphase separation for tailoring the mechanical properties of thermoplastic elastomers. GNP loading, lateral size, surface chemistry, interactions with the copolymer hard (HS) and soft (SS) segments and the relative ratio of HS:SS determine the mechanical properties achievable. To test this hypothesis, two different GNPs with similar surface chemistry but which differed in lateral dimensions by one order of magnitude (GNP1, ∼2 μm and GNP2, ∼20 μm) were melt mixed with three different poly(ether-block-amide)s (PE-b-A)s with variable HS and SS content from high to low. The inclusion of the larger lateral sized GNP2 had a more pronounced effect on PE-b-A morphology as it was more effective at hindering SS chain mobility resulting in microphase separation and suppression of the glass transition temperature (T_g) of the PE-b-A with the largest SS content. At low loadings GNP2 preferentially locates to the HS region, inducing reorganisation of this phase resulting in increased microphase separation. Strain induced crystallisation (SIC) phenomena were also observed for the lowest HS content PE-b-A, behaviour not evident for the PE-b-A with the largest HS content as the SS are not long enough to allow SIC. Inclusion of GNP2 to the PE-b-A with the largest HS content resulted in the largest increase in Young's modulus (E) of 46 %, tensile strength (σ) of 37 % and elongation at break (ε) of 53 % relative to the unfilled polymer.

在分段嵌段共聚物中加入石墨烯纳米片（GNP），为控制微相分离提供了一条途径，从而调整热塑性弹性体的机械性能。GNP载荷、横向尺寸、表面化学、与共聚物硬段（HS）和软段（SS）的相互作用以及HS:SS的相对比例决定了可实现的机械性能。为了验证这一假设，将两种表面化学性质相似但横向尺寸相差一个数量级的不同GNPs （GNP1， ~ 2 μm和GNP2， ~ 20 μm）与三种不同的聚醚-嵌段酰胺（PE-b-A）s （HS和SS含量由高到低）熔体混合。横向尺寸较大的GNP2对PE-b-A形貌的影响更为明显，因为它更有效地阻碍SS链的迁移，导致SS含量最大的PE-b-A的微相分离和玻璃化转变温度（Tg）的抑制。在低负荷下，GNP2优先定位于HS区，诱导该相的重组，导致微相分离增加。在HS含量最低的PE-b-A中也观察到应变诱导结晶（SIC）现象，而HS含量最高的PE-b-A中由于SS的长度不足以允许SIC的存在，这种现象不明显。在HS含量最高的PE-b-A中加入GNP2，相对于未填充的聚合物，杨氏模量(E)增加46%，抗拉强度（σ）增加37%，断裂伸长率（ε）增加53%。

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引用次数: 0

Physicochemically modified polymer-based fluidic gates with tunable wetting properties for intelligent liquid manipulations 具有可调润湿特性的物理化学修饰聚合物基流控门，用于智能液体操作

IF 9.9 Q1 MATERIALS SCIENCE, COMPOSITES

Advanced Industrial and Engineering Polymer Research

Pub Date : 2025-04-01 DOI: 10.1016/j.aiepr.2024.11.001

Sehwan Song , Youlim Lee , Woochul Lee , Sang-Hee Yoon

The creation of a selective flow path and the regulation of a flow rate are of critical importance for polymer-based devices that manipulate liquid at the microscale. The formation of a 3D interconnected network of voids (i.e., physical volumetric modification) and the addition of a nonionic surfactant, Silwet L-77, (i.e., chemical volumetric modification) are expected to affect the wetting properties of polymers, thereby achieving selective gating effect in the polymer-based devices as an appropriate technology. Here, a set of polydimethylsiloxane (PDMS)-based fluidic gates (F-gates) were developed to enable selectivity for liquids and flow-rate control of the liquids by tuning the wetting properties of PDMS with the physicochemical volumetric modifications. For water and oil with different surface tensions (STs), the effects of the physical and chemical volumetric modifications on the fluidic gating of PDMS were quantitatively characterized in terms of contact angle, mass flow rate, and liquid absorption speed. The applicability of PDMS-based F-gates to the selective separation of oil and water even from oil-in-water emulsion was demonstrated by fabricating Janus PDMS-based F-gates. Our physicochemical volumetric modifications were also extensively analyzed to examine whether they satisfy the technological, economic, and ecological requirements of appropriate technology. This is the first effort to tailor the wetting properties of PDMS through physicochemical volumetric modifications, thus configuring a set of PDMS-based F-gates that act both as a separator for liquids of different STs and as a switch for fluid flows.

选择性流动路径的创建和流速的调节对于在微观尺度上操纵液体的聚合物基装置至关重要。形成三维互连的空洞网络（即物理体积改性）和添加非离子表面活性剂Silwet L-77（即化学体积改性）有望影响聚合物的润湿性能，从而在聚合物基器件中实现选择性门控效应，作为一种合适的技术。本文开发了一套基于聚二甲基硅氧烷（PDMS）的流体门（F-gates），通过物理化学体积修饰来调节PDMS的润湿特性，从而实现液体的选择性和液体的流速控制。对于具有不同表面张力（STs）的水和油，从接触角、质量流量和液体吸收速度等方面定量表征了物理和化学体积改性对PDMS流体门控的影响。通过制作Janus pms -based F-gates，证明了pms -based F-gates在油包水乳液中选择性分离油水的适用性。我们还广泛分析了物理化学体积修改，以检查它们是否满足适当技术的技术、经济和生态要求。这是第一次通过物理化学体积修改来调整PDMS的润湿特性，从而配置一组基于PDMS的f门，既可以作为不同STs液体的分离器，也可以作为流体流动的开关。

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引用次数: 0

4D printing of high-performance shape memory polymer with double covalent adaptive networks 具有双共价自适应网络的高性能形状记忆聚合物的4D打印

IF 9.9 Q1 MATERIALS SCIENCE, COMPOSITES

Advanced Industrial and Engineering Polymer Research

Pub Date : 2025-04-01 DOI: 10.1016/j.aiepr.2024.11.002

Zhangzhang Tang , Gao Deng , Yiyuan Sun , Liming Tao , Chao Wang , Zenghui Yang , Peng Liu , Qihua Wang , Yaoming Zhang , Tingmei Wang

Achieving 4D printing of shape memory polymers with both high strength and high transition temperature remains challenging due to the inherent incompatibility between the rigid molecular structure required for high strength and the molecular structure that moves on demand necessary for the shape memory effect, the limitations of high-performance polymer reaction kinetics, as well as internal stress during the printing process. Here, a direct ink writing (DIW) printed high-precision cyanate ester-urethane (CU) shape memory polymer with excellent performance was accomplished by incorporating two dynamic covalent bonds (carbamate and cyanuric acid) through copolymerizing cyanate ester with polyurethane acrylates. During curing, carbamate and cyanuric acid enable stress relaxation and polymer network rearrangement, facilitating the permanent reconfiguration of CU to form a novel triazine network structure. As a result, a high mechanical properties CU with excellent strength (83 MPa) and superior Young's modulus (2.37 GPa) were obtained, besides, the transition temperature (near 250 °C) is the highest in comparison to currently reported 4D-printed shape memory polymers. Furthermore, this reconfigurability was demonstrated by imprinting various surface patterns at microscopic level. Moreover, the reconfigurability of CU provides a novel strategy for smart molds in deformation and easy demolding. Overall, this study opens up a new avenue for the development of high-performance 4D printed shape memory polymers.

实现具有高强度和高转变温度的形状记忆聚合物的4D打印仍然具有挑战性，因为高强度所需的刚性分子结构与形状记忆效应所需的按需移动的分子结构之间存在固有的不兼容性，高性能聚合物反应动力学的局限性以及打印过程中的内应力。通过氰酸酯与聚氨酯丙烯酸酯的共聚，形成两个动态共价键（氨基甲酸酯和氰尿酸），实现了一种性能优异的直接油墨书写（DIW）印刷高精度氰酸酯-聚氨酯（CU）形状记忆聚合物。在固化过程中，氨基甲酸酯和氰尿酸使CU的应力松弛和聚合物网络重排，促进CU的永久重配置，形成新的三嗪网络结构。结果表明，该材料具有优异的强度（83 MPa）和优异的杨氏模量（2.37 GPa），并且其转变温度（接近250℃）是目前报道的3d打印形状记忆聚合物中最高的。此外，这种可重构性在微观水平上通过印迹各种表面图案得到了证明。此外，CU的可重构性为智能模具的变形和易脱模提供了一种新的策略。总的来说，本研究为高性能4D打印形状记忆聚合物的开发开辟了一条新的途径。

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引用次数: 0