Composites Communications最新文献_第4页

Construction of an in-situ TiC and (TiZr)5Si3 dual-scale network hierarchical structure in titanium matrix composites and its effect on mechanical properties 原位TiC和（TiZr）5Si3双尺度网状层状结构的构建及其对钛基复合材料力学性能的影响

IF 6.5 2区材料科学

Composites Communications Pub Date : 2025-04-30 DOI: 10.1016/j.coco.2025.102437

Qiang Wang , Zhao-Hui Zhang , Xiao-Tong Jia , Yang-Yu He , Jin-Zhao Zhou , Yuan-Hao Sun , Xing-Wang Cheng

{"title":"Construction of an in-situ TiC and (TiZr)5Si3 dual-scale network hierarchical structure in titanium matrix composites and its effect on mechanical properties","authors":"Qiang Wang , Zhao-Hui Zhang , Xiao-Tong Jia , Yang-Yu He , Jin-Zhao Zhou , Yuan-Hao Sun , Xing-Wang Cheng","doi":"10.1016/j.coco.2025.102437","DOIUrl":"10.1016/j.coco.2025.102437","url":null,"abstract":"<div><div>In this study, the pyrolysis products of polycarbosilane were used as sources of carbon and silicon to synthesize (TiZr)<sub>5</sub>Si<sub>3</sub> and TiC reinforcements, enhancing the performance of titanium matrix composites. By controlling the particle scale of the matrix alloy powders, the scale of the reinforcement network structure was successfully manipulated. The microstructural features and mechanical behavior of the (TiC+(TiZr)<sub>5</sub>Si<sub>3</sub>)/TA15 composite were systematically examined. The findings show that the (TiZr)<sub>5</sub>Si<sub>3</sub> and TiC reinforcements create a multi-scale hierarchical network structure within the composite, effectively inhibiting β grains coarsening. The TiC particles have an average size of approximately 3.1 μm, while the (TiZr)<sub>5</sub>Si<sub>3</sub> particles are around 95 nm in size. Relative to pure TA15 alloy, the β grains were refined from 474.7 μm to 40.6 μm. Moreover, the strength of the composite decreased as the network structure size increased, with the maximum yield strength reaching 1423 MPa, a 47.3 % improvement over the TA15 matrix. Meanwhile, the maximum hardness reaches 402.1 HV, corresponding to a 15.8 % increase compared to the TA15 matrix. This improvement primarily results from the refined grains and the uniform dispersion of reinforcements, while the composite’s plasticity remained nearly unaffected by the network structure dimensions.</div></div>","PeriodicalId":10533,"journal":{"name":"Composites Communications","volume":"57 ","pages":"Article 102437"},"PeriodicalIF":6.5,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143900027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

DTAB-functionalized MXene nanofillers for enhancing dielectric and mechanical properties of TPU-based composites dtab功能化MXene纳米填料增强tpu基复合材料的介电性能和力学性能

IF 6.5 2区材料科学

Composites Communications Pub Date : 2025-04-30 DOI: 10.1016/j.coco.2025.102426

Yajing Liu , Yanhong Jia , Weiwei He , Huirong Le

{"title":"DTAB-functionalized MXene nanofillers for enhancing dielectric and mechanical properties of TPU-based composites","authors":"Yajing Liu , Yanhong Jia , Weiwei He , Huirong Le","doi":"10.1016/j.coco.2025.102426","DOIUrl":"10.1016/j.coco.2025.102426","url":null,"abstract":"<div><div>With the rapid advancement of flexible electronics technology, there is substantial demand for flexible dielectric materials that exhibit both high dielectric constant and low dielectric loss. In this work, thermoplastic polyurethane (TPU)-based composites were developed by incorporating decyltrimethylammonium bromide-functionalized MXene (MXene@DTAB) as the filler, with the aim of enhancing the dielectric properties of TPU materials. The embedment of the alkyl long chains, derived from DTAB, significantly improved the dispersion of MXene in organic solvents and promoted a more uniform distribution of MXene within the TPU matrix, as evidenced by EDS mapping. Consequently, the MXene@DTAB/TPU composite with an 8 wt% filler content achieved a maximum dielectric constant of 161.91 at 1 kHz, which was nearly 14 times higher than that of pure TPU (11.02), while maintaining a low dielectric loss of 0.61. In addition, the results of dynamic mechanical analysis indicated an increase in rigidity and energy dissipation, highlighting the improved mechanical properties of the composites. Furthermore, based on the MXene@DTAB/TPU dielectric material, a flexible capacitive pressure sensor was created and it exhibited an enhanced sensitivity of 0.137 kPa<sup>−1</sup> (<24 kPa). Overall, the dielectric materials developed in this study demonstrate promising potential for applications in energy storage, electromagnetic interference shielding, flexible sensors, and dielectric elastomer actuators.</div></div>","PeriodicalId":10533,"journal":{"name":"Composites Communications","volume":"57 ","pages":"Article 102426"},"PeriodicalIF":6.5,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143900028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

In situ synthesis of polysaccharide-stabilized amorphous calcium Phosphate: Mechanical performance and In vitro biological assessment 原位合成多糖稳定的无定形磷酸钙：力学性能和体外生物学评价

IF 6.5 2区材料科学

Composites Communications Pub Date : 2025-04-30 DOI: 10.1016/j.coco.2025.102436

Hamza Elbaza , Hanaa Mabroum , Yousra Hamdan , Rachid El Fatimy , Sanae Ben Mkaddem , Hicham Ben youcef , Allal Barroug , Hassan Noukrati

{"title":"In situ synthesis of polysaccharide-stabilized amorphous calcium Phosphate: Mechanical performance and In vitro biological assessment","authors":"Hamza Elbaza , Hanaa Mabroum , Yousra Hamdan , Rachid El Fatimy , Sanae Ben Mkaddem , Hicham Ben youcef , Allal Barroug , Hassan Noukrati","doi":"10.1016/j.coco.2025.102436","DOIUrl":"10.1016/j.coco.2025.102436","url":null,"abstract":"<div><div>The short lifetime and the weak mechanical properties of amorphous calcium phosphate-based materials (ACP) constitute the most relevant drawbacks prohibiting their use for orthopedic application. The current study focuses on the <em>in-situ</em> synthesis of ACP composite using sodium alginate and/or chitosan as biopolymers to address these drawbacks. The prepared composites were characterized using XRD, FTIR, SEM, and TGA-DTA. The formulated composites using alginate (ACP<sub>Alg</sub>), chitosan (ACP<sub>CS</sub>), and alginate-chitosan (ACP<sub>Alg-CS</sub>) exhibited an amorphous structure typical of the amorphous nature of the ACP phase. The evolution of the precipitated amorphous phase as a function of the maturation time indicated that polymer-free ACP is stable only for 5 min. However, adding the polysaccharides increases the amorphous phase lifetime from 5 min to 2 h, thus raising its stability. The TGA-DTA analysis demonstrated that the presence of polymers significantly delayed the crystallization of ACP, confirming their stabilization effect. Furthermore, the polymer content in the amorphous composites estimated using TGA analysis revealed that only 6.7 wt% and 7.2 wt% of the polymeric phase were associated with the amorphous matrix in ACP<sub>Alg</sub> and ACP<sub>Alg-CS</sub>, respectively. Nevertheless, 19 wt% of chitosan polymer was successfully associated with the ACP<sub>CS</sub> matrix. The three-dimensional composites elaborated from ACP<sub>CS</sub> and ACP<sub>Alg-CS</sub> and using acetic acid as a liquid phase exhibited high compressive strength, achieving a value of 98 MPa for ACP<sub>CS</sub>-based composite. The <em>in vitro</em> bioactivity and biodegradability of the prepared biocomposites in the SBF solution were confirmed. Moreover, the cytotoxicity test of the selected composites highlighted their high biocompatibility.</div></div>","PeriodicalId":10533,"journal":{"name":"Composites Communications","volume":"57 ","pages":"Article 102436"},"PeriodicalIF":6.5,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

In vitro and in vivo assessment of 3D-printed PCL/PLA/ZnO nanocomposite scaffolds for osteoarthritis treatment 3d打印PCL/PLA/ZnO纳米复合支架治疗骨关节炎的体外和体内评价

IF 6.5 2区材料科学

Composites Communications Pub Date : 2025-04-30 DOI: 10.1016/j.coco.2025.102432

M. Peiravi , Z. Sherafat , M. Sani , N. Azarpira

{"title":"In vitro and in vivo assessment of 3D-printed PCL/PLA/ZnO nanocomposite scaffolds for osteoarthritis treatment","authors":"M. Peiravi , Z. Sherafat , M. Sani , N. Azarpira","doi":"10.1016/j.coco.2025.102432","DOIUrl":"10.1016/j.coco.2025.102432","url":null,"abstract":"<div><div>3D scaffolds that mimic the extracellular matrix can be a promising alternative to bone grafting in the treatment of bone injuries. This study aimed to develop 3D-printed PCL/PLA/ZnO scaffolds and evaluate their physical and biological properties for potential application in osteoarthritis-related bone and cartilage repair. Scaffolds of PCL containing 0, 1, 2, and 3 wt % ZnO and PLA were printed layer by layer. Polycaprolactone is widely recognized as a biocompatible and bioactive material and to enhance its biodegradability and hydrophilicity, polylactic acid was incorporated. Additionally, ZnO can improve mechanical and biological characteristics. Results showed that the PCL/PLA samples exhibit more hydrophilic surfaces compared to pure PCL samples, which can enhance cell adhesion, growth, and proliferation. In vitro assessments showed that these samples are biodegradable and bioactive, could support cell attachment, proliferation and differentiation to bone cells and intensified calcium mineralization. The PCL/PLA/2 %ZnO had the best result and was chosen for in vivo assessment. Considering the involvement of articular cartilage in osteoarthritis, this scaffold was investigated in a rabbit model of osteoarthritis for cartilage tissue repair. Histological evaluations indicated improved cellular organization in the treated sites. Additionally, the scaffolds contributed to a reduction in inflammation. These findings suggest that the scaffold serves as a dual-function support structure, making it a promising candidate for the treatment of joint-related injuries such as osteoarthritis. Ultimately, this research establishes a foundation for further investigation into the multifunctional application of such scaffolds in regenerative medicine, with the potential to improve joint function and patient outcomes.</div></div>","PeriodicalId":10533,"journal":{"name":"Composites Communications","volume":"57 ","pages":"Article 102432"},"PeriodicalIF":6.5,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Highly connected thin electrodes comprising Ag–Ni core–shell nanowires for flexible CNT/graphene Joule heaters 用于柔性碳纳米管/石墨烯焦耳加热器的由Ag-Ni核壳纳米线组成的高度连接的薄电极

IF 6.5 2区材料科学

Composites Communications Pub Date : 2025-04-29 DOI: 10.1016/j.coco.2025.102425

Woojin Lim , Jungwoo Huh , Bhavana Joshi , Edmund Samuel , Ali Aldalbahi , Govindasami Periyasami , Hae-Seok Lee , Sam S. Yoon

{"title":"Highly connected thin electrodes comprising Ag–Ni core–shell nanowires for flexible CNT/graphene Joule heaters","authors":"Woojin Lim , Jungwoo Huh , Bhavana Joshi , Edmund Samuel , Ali Aldalbahi , Govindasami Periyasami , Hae-Seok Lee , Sam S. Yoon","doi":"10.1016/j.coco.2025.102425","DOIUrl":"10.1016/j.coco.2025.102425","url":null,"abstract":"<div><div>Ag nanomaterials are typically used in solar-cell electrodes, medical imaging optical devices, touchscreen sensors, air and water purification devices, light-emitting diodes, catalysts, conductive adhesives, and wearable heaters. Although relatively bulky and expensive, Ag paste is widely used as an electrode material in these applications. The lightweight Ag–Ni core–shell nanowires (AgNW–Ni) developed in this study exhibit excellent thermal and electrical properties, even at extremely low mass loadings, because of their excellent electrical network resembling a spider web. Because Ni possesses a higher melting temperature than Ag, AgNWs were electroplated with Ni to protect Ag from disintegration under high Joule heating conditions. Then, AgNW–Ni electrodes were installed at both ends of a flexible carbon nanotube/graphene heater. The AgNW–Ni and Ag-paste electrodes with thicknesses of 1 and 35 μm disintegrated at <em>T</em><sub>max</sub> = 303 and 286 °C, respectively, under high Joule heating. Owing to its lower thickness, AgNW–Ni electrode synthesis consumes less material than synthesizing Ag-paste electrodes; thus, AgNW–Ni is relatively cost-effective. In addition to being used in electrodes, AgNW–Ni can be used as an active heating material. The patternability of the AgNW–Ni films for heaters of various shapes was also investigated in this study.</div></div>","PeriodicalId":10533,"journal":{"name":"Composites Communications","volume":"57 ","pages":"Article 102425"},"PeriodicalIF":6.5,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143894342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Magnetic-dielectric balance in chain-like CoNi@C heterojunction with enhanced electromagnetic wave absorption 电磁波吸收增强的链状CoNi@C异质结的磁介电平衡

IF 6.5 2区材料科学

Composites Communications Pub Date : 2025-04-28 DOI: 10.1016/j.coco.2025.102424

Xiaofeng Shi , Lei Wang , Lin Chen , Qiaoling Xu , Zhengting Du , Deqing Shi , Zhenfa Zi , Renchao Che

{"title":"Magnetic-dielectric balance in chain-like CoNi@C heterojunction with enhanced electromagnetic wave absorption","authors":"Xiaofeng Shi , Lei Wang , Lin Chen , Qiaoling Xu , Zhengting Du , Deqing Shi , Zhenfa Zi , Renchao Che","doi":"10.1016/j.coco.2025.102424","DOIUrl":"10.1016/j.coco.2025.102424","url":null,"abstract":"<div><div>Chain-like magnetic-dielectric composites have become an ideal choice for electromagnetic (EM) wave absorption materials due to their excellent component adjustment and structural optimization. Here, the chain-like CoNi@C heterojunction was obtained via multi-step reaction combining the solvothermal reaction, polymerization reaction, and annealing treatment. Magnetic chain-like CoNi alloy was firstly synthesized under application magnetic field, where offered the polymerization surfaces for the dopamine monomer. Then, as-prepared CoNi@PDA composites were undergoing the annealing treatment at N<sub>2</sub> atmosphere to obtain the chain-like CoNi@C heterojunction. The EM parameters and impedance match properties of the CoNi@C composites can be efficiently regulated via tunning the carbon shell. Combining with the magnetic-dielectric balance and synergy loss absorption, chain-like CoNi@C heterojunction exhibited outstanding EM wave performance. Optimized CoNi@C-7 heterojunction exhibited the minimum reflection loss (RL<sub>min</sub>) value can reach to −50.3 dB at 11.92 GHz when the thickness is 1.95 mm and the effective absorption bandwidth (EAB) can up to 4.16 GHz from 13.84 GHz to 18 GHz at only 1.5 mm thickness. Therefore, the chain-like magnetic-dielectric CoNi@C composites provided a new design ideal to fabricate the EM wave absorption materials.</div></div>","PeriodicalId":10533,"journal":{"name":"Composites Communications","volume":"56 ","pages":"Article 102424"},"PeriodicalIF":6.5,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143890701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Highly conductive lignin-derived carbon nanotube/copper yarns with excellent electrothermal performance 具有优良电热性能的高导电性木质素衍生碳纳米管/铜纱线

IF 6.5 2区材料科学

Composites Communications Pub Date : 2025-04-26 DOI: 10.1016/j.coco.2025.102423

Ruyu Li , Xue Li , Shi Feng , Lijun Yang , Senlong Yu , Hengxue Xiang , Meifang Zhu

{"title":"Highly conductive lignin-derived carbon nanotube/copper yarns with excellent electrothermal performance","authors":"Ruyu Li , Xue Li , Shi Feng , Lijun Yang , Senlong Yu , Hengxue Xiang , Meifang Zhu","doi":"10.1016/j.coco.2025.102423","DOIUrl":"10.1016/j.coco.2025.102423","url":null,"abstract":"<div><div>Traditional carbon nanotube (CNT) synthesis often uses petroleum-based materials, while biomass-derived CNTs are more environmentally friendly. Carbon nanotube yarns (CNTYs), as macroscopic forms of CNTs, combine good electrical conductivity and lightness, reducing the risk of fiber breakage and holding great potential in flexible electrothermal devices. However, structural defects such as carbon nanotube entanglement and inter-tube gaps restrict biomass-based carbon nanotube yarns, and their performance potential has not been fully realized. This study synthesized a lignin-derived carbon nanotube yarn (LCNTY) using the floating catalytic chemical vapor deposition (FCCVD) method. Using a multi-scale strategy with stretching densification, plasma treatment, and metal loading, we created a “structure-interface-deposition” system to make flexible, highly conductive lignin-derived CNT/copper yarn. The electrical conductivity of the prepared lignin-derived carbon nanotube yarn increased from 2.30 × 10<sup>5</sup> S m<sup>−1</sup> to 1.20 × 10<sup>6</sup> S m<sup>−1</sup> after being stretched and densified with the assistance of chlorosulfonic acid (CSA), and to 4.46 × 10<sup>6</sup> S m<sup>−1</sup> after the surface was functionalized by oxygen plasma and copper electroplating was carried out, which is superior to most carbon nanotube yarns. In electrothermal tests, the lignin-derived carbon nanotube/copper yarn obtained through a series of modifications reached 146.2 °C in 2 s at 2.2 V and stayed stable for over 1000 s. This work provides valuable insights into the potential of flexible biomass-derived carbon nanotube/metal yarns in electrothermal applications.</div></div>","PeriodicalId":10533,"journal":{"name":"Composites Communications","volume":"56 ","pages":"Article 102423"},"PeriodicalIF":6.5,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143886774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","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 a breathable and degradable silk fibroin/sodium alginate/aniline tetramer electronic skin by in situ polymerization method and for human motion monitoring 用原位聚合法制备一种透气、可降解的丝素/海藻酸钠/苯胺四聚体电子皮肤

IF 6.5 2区材料科学

Composites Communications Pub Date : 2025-04-22 DOI: 10.1016/j.coco.2025.102419

Shitong Li , Hanyu Chu , Shizhuo Li , Xinyu Wang , Tong Qiu , Han Yan

{"title":"Synthesis of a breathable and degradable silk fibroin/sodium alginate/aniline tetramer electronic skin by in situ polymerization method and for human motion monitoring","authors":"Shitong Li , Hanyu Chu , Shizhuo Li , Xinyu Wang , Tong Qiu , Han Yan","doi":"10.1016/j.coco.2025.102419","DOIUrl":"10.1016/j.coco.2025.102419","url":null,"abstract":"<div><div>Electronic skin (e-skin) can monitor various physiological indicators of the human body in real-time, which has a wide application prospect in personalized medicine and health care. Nevertheless, the development of e-skin is hindered by the skin discomfort caused by the dense matrix of traditional e-skin and the electronic waste (e-waste) generated by non-degradable components. To solve these problems, this study proposes a piezoresistive e-skin with high breathability and significant degradability using a double-layer sponge as the substrate and aniline tetramer as the conductive medium. The aniline tetramer is adsorbed on the fibroin/sodium alginate matrix by in situ polymerization, which is simple, rapid, and less restrictive to prepare. The developed e-skin demonstrated a wide detection range (0–20 kPa), ultra-low detection limit (0.06 Pa), fast response time (20 ms), and good stability (1000 cycles). The e-skin also has good antibacterial ability, excellent water vapor transmission rate (7.65 kg m<sup>−2</sup>·day<sup>−1</sup>), and biocompatibility, ensuring the comfort of long-term wearing. In addition, the e-skin is completely degraded into small particles after being immersed in sodium hydroxide solution for 48 h, greatly avoiding the generation of e-waste. In practical applications, e-skin responds quickly to weak stimuli and shows excellent sensing performance in human movement monitoring. This novel combination of the conductive oligomer and sponge substrate helps to promote the development of green electronics and implantable sensing devices.</div></div>","PeriodicalId":10533,"journal":{"name":"Composites Communications","volume":"56 ","pages":"Article 102419"},"PeriodicalIF":6.5,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143868432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simple but efficient preparation of high-strength, heat-resistant, and high-barrier PLA/TOBC plastic packaging containers via pickering emulsion 简单而高效的制备高强度，耐热，高阻隔PLA/TOBC塑料包装容器通过酸洗乳液

IF 6.5 2区材料科学

Composites Communications Pub Date : 2025-04-22 DOI: 10.1016/j.coco.2025.102420

Liyan Yi , Tongrui Zhang , Chuanhu Lu , Longxiang Tang , Guodong Ding , Chunyan Zhong , Yuguang Zhong , Guoshen Bian , Jian Wei , Huiqing Wang , Min Nie

{"title":"Simple but efficient preparation of high-strength, heat-resistant, and high-barrier PLA/TOBC plastic packaging containers via pickering emulsion","authors":"Liyan Yi , Tongrui Zhang , Chuanhu Lu , Longxiang Tang , Guodong Ding , Chunyan Zhong , Yuguang Zhong , Guoshen Bian , Jian Wei , Huiqing Wang , Min Nie","doi":"10.1016/j.coco.2025.102420","DOIUrl":"10.1016/j.coco.2025.102420","url":null,"abstract":"<div><div>Bio-based polylactic acid (PLA) with degradable, environmentally friendly and bio-friendly properties has become important sustainable material. However, the inherent disadvantages of PLA, such as weak crystallization ability, poor thermal stability, and poor barrier properties, limit its application in areas such as Plastic packaging-Containers. In this paper, a simple but efficient method was established to decrease effect of inherent disadvantages of PLA and expand its application, is by pickering emulsion. Food sources bacterial cellulose blocks were oxidized and followed high-pressure homogenization to prepare nano-bacterial cellulose (TOBC) as amphiphilic emulsifier, then TOBC nanofibers coated/stabilized PLA microspheres were prepared via pickering emulsion method, that avoiding the problem of interface separation between nanocellulose and PLA. As a result, TOBC served as a heterogeneous nucleating agent to greatly improve the crystallization behavior of PLA, boosting the crystallinity of the composite from 21.8 % to 49.6 %. After hot-pressing or injection processing to a shaped material, the prepared PLA/TOBC composites exhibited the excellent combined properties with tensile strength of 66.2 MPa, flexural strength of 81.22 MPa, impact strength of 2.72 kJ/m<sup>2</sup> and Vicat softening temperature of 167.3 °C. Meanwhile, TOBC addition also greatly improved the oxygen barrier ability of the composite, and the oxygen transmission rate was reduced from 143.77 cm<sup>3</sup>/(cm<sup>2</sup>-24h-0.1 MPa) for PLA to 16.01 cm<sup>3</sup>/(cm<sup>2</sup>-24h-0.1 MPa) for PLA/TOBC-3. This means that PLA/TOBC composites are expected to be used as environmentally friendly Plastic packaging-containers with high barrier capacity, providing new ideas for the development of Plastic packaging products.</div></div>","PeriodicalId":10533,"journal":{"name":"Composites Communications","volume":"56 ","pages":"Article 102420"},"PeriodicalIF":6.5,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143868435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Viscoelasticity of solvent-free polymer-grafted nanoparticles 无溶剂聚合物接枝纳米颗粒的粘弹性

IF 6.5 2区材料科学

Composites Communications Pub Date : 2025-04-21 DOI: 10.1016/j.coco.2025.102417

Yinglin Wang , Yong Sun , Jiaping Lin, Liquan Wang, Chunhua Cai

{"title":"Viscoelasticity of solvent-free polymer-grafted nanoparticles","authors":"Yinglin Wang , Yong Sun , Jiaping Lin, Liquan Wang, Chunhua Cai","doi":"10.1016/j.coco.2025.102417","DOIUrl":"10.1016/j.coco.2025.102417","url":null,"abstract":"<div><div>Polymer-grafted nanoparticles (PGNs), which synergistically combine nanoparticle motion and polymer relaxation dynamics, exhibit unique hybrid viscoelastic characteristics crucial for fundamental scientific understanding and advanced material design. In this study, we employed dissipative particle dynamics (DPD) simulations coupled with nonequilibrium oscillatory shear techniques to systematically investigate the rheological properties of solvent-free PGNs with moderate grafting density. Our simulation results reveal a strong dependence of viscoelastic behavior on two key structural parameters: grafted polymer chain length and nanoparticle radius. Specifically, PGNs with shorter grafted chains or larger nanoparticles demonstrate a distinctive low-frequency elastic plateau attributed to the cage effect arising from their close-packed structures. Conversely, systems with longer grafted chains or smaller nanoparticles exhibit the formation of string-like structures, resulting in anisotropic viscoelastic responses. At higher frequencies, we observed a characteristic loss tangent peak corresponding to the collective motion of PGNs, whose position shifts with variations in grafted chain length and nanoparticle size. Furthermore, the frequency sweep curves consistently showed a reproducible downturn in loss modulus. These findings provide fundamental insights into the structure-property relationships of PGNs and offer valuable guidance for designing advanced nanocomposites with tunable dynamic moduli.</div></div>","PeriodicalId":10533,"journal":{"name":"Composites Communications","volume":"56 ","pages":"Article 102417"},"PeriodicalIF":6.5,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143868433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0