Article
Chemistry, Multidisciplinary
Muhammad Nisar, Griselda Barrera Galland, Julian Geshev, Carlos Bergmann, Raul Quijada
Summary: Recent studies have shown that magnetically active polypropylene nanocomposites can be obtained by melt mixing and supporting metallic nanoparticles on thermally reduced graphene oxide. The addition of fillers improves the thermal stability and mechanical properties of the polymer, as well as changes the magnetic and hydrophilic properties of the materials.
Article
Materials Science, Composites
Haipeng Dong, Minghui Liu, Xianlei Chen, Guofang Han, Liang Li, Fangfang Lu, Baikang Zhu, Hengcong Tao
Summary: In this study, graphene was successfully exfoliated and dispersed in polypropylene matrix using in situ liquid-phase exfoliation method. By centrifuging the graphene under specific conditions and extruding at a specific temperature, the composite achieved significant improvement in mechanical properties with the addition of only 0.2 wt% graphene. The inclusion of graphene not only enhanced the yield strength, bending modulus, and impact strength of the composite, but also increased the thermal conductivity.
POLYMER COMPOSITES
(2022)
Article
Engineering, Multidisciplinary
Enrico Carmeli, Federico di Sacco, Giuseppe Portale, Dario Cavallo, Roland Kadar, Antonis Gitsas, Thomas Gkourmpis, Davide Tranchida
Summary: Understanding the solidification behavior of iPP composites with reduced graphene oxide nanoplatelets is crucial for their widespread use. This study investigated the crystallization behavior of these composites and found that the nucleation efficiency of the graphene filler is high even at low concentrations, with a significant impact on the crystallization transition.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Polymer Science
Ayesha Naz, Ibtsam Riaz, Rashid Jalil, Shama Afzal, Abdul Qayyum Khan
Summary: The study investigated the creep and recovery performance of polypropylene/hydrothermally reduced graphene oxide (RGO) composites at different temperatures. It was found that the addition of RGO sheets into polypropylene significantly increased the creep resistance and recoverable response of the nanocomposite at high temperatures.
Article
Nanoscience & Nanotechnology
Na Song, Feng Zhang, Donglei Cao, Pei Wang, Peng Ding
Summary: The study demonstrates that PP/rGO hybrid films exhibit excellent thermal conductivity and good mechanical properties, mainly due to their special structure and effective interface interaction. The research results provide new ideas and methods for the application of high thermally conductive composites.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Soh Jin Mun, Yul Hui Shim, Geon Woong Kim, Sung Hwan Koo, Hyungju Ahn, Tae Joo Shin, Sang Ouk Kim, So Youn Kim
Summary: This study investigates the hierarchical structures of GO nematic liquid crystal phase during polymer crystallization using SAXS/WAXD techniques. It is found that the co-existence of GO LC and polymer crystals in GO/polymer complex influences the overall liquid crystallinity, with polymer crystallization affecting the microstructure of GO, especially in the case of interfacial crystallization. Furthermore, the interfacial crystallization of PEG on GO enhances both GO alignment and the orientation of PEG crystal.
Article
Nanoscience & Nanotechnology
Mastooreh Seyedi, Mykhailo Savchak, Andrii Tiiara, Igor Luzinov
Summary: This research reports the compatibilization of immiscible PS/PP blends using graphene oxide (GO) modified with a bottlebrush reactive copolymer layer. The study shows that the GO-P blend has higher interfacial activity and the GO-P sheets are more easily incorporated into the PS/PP interphase. The introduction of GO-P enhances the mechanical properties of the blends.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Composites
Pamela S. Garcia, Yuri D. C. Oliveira, Fernanda C. F. Valim, Rumiana Kotsilkova, Evgeni Ivanov, Ricardo K. Donato, Guilhermino J. M. Fechine, Ricardo J. E. Andrade
Summary: Two synthetic routes were designed to obtain graphene oxide (GO) with different degrees of oxidation and particle sizes, leading to improved performance in polypropylene (PP)/GO nanocomposites. The less oxidized GO-S showed better compatibility with PP matrix, resulting in enhanced thermal stability and mechanical properties. Tailoring GO's oxidation degree and morphology is crucial for achieving ideal interfacial interactions in nanocomposites.
POLYMER COMPOSITES
(2021)
Article
Materials Science, Multidisciplinary
He Ren, Eunice Cunha, Zheling Li, Lei Wang, Ian A. Kinloch, Dian Yi, Andrew Kretinin, Quanji Sun, Zhaodong Fan, Robert J. Young
Summary: The effect of silane-functionalized graphene nanoplatelets on the mechanical properties and thermal conductivity of reinforced silicone rubber was studied, with experimental results matching theoretical predictions.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Thermodynamics
Jingru Liu, Hongwei Liang
Summary: Liquid-phase exfoliated graphene added into isotactic polypropylene via melt blending acts as a strong nucleating agent, significantly increasing the crystallization rate and mechanical properties, especially toughness, of iPP. The enhancements are more pronounced at low graphene loading levels.
THERMOCHIMICA ACTA
(2021)
Article
Polymer Science
Zhenxing Zhong, Zhaohui Su
Summary: In this study, the crystallization behavior of PB in its blends with iPP and aPP was systematically investigated using various experimental methods. It was found that iPP was more effective in promoting the formation of I' polymorph in the blends, while the cold crystallization rate of PB in the iPP blend with fully crystallized iPP was faster.
Article
Biochemistry & Molecular Biology
Luigia Fonticoli, Francesca Diomede, Antonio Nanci, Antonella Fontana, Ylenia Della Rocca, Dainelys Guadarrama Bello, Serena Pilato, Oriana Trubiani, Jacopo Pizzicannella, Guya Diletta Marconi
Summary: This study aimed to evaluate the anti-inflammatory effects of polypropylene suture threads buttons (PPSTBs) enriched with two different concentrations of graphene oxide (GO) in an in vitro model using primary human gingival fibroblasts (hGFs). The results showed that both concentrations of GO decreased the expression of inflammatory markers in hGFs treated with Escherichia coli lipopolysaccharide (LPS-E). The morphology and adhesion of hGFs on the PPSTBs-GO constructs were also examined.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Polymer Science
Noelle Billon, Romain Castellani, Jean-Luc Bouvard, Guilhem Rival
Summary: This paper explores the viscoelastic behavior during crystallization and melting of semicrystalline polymers, aiming to propose a preliminary model for the impact of crystallization and melting on the storage and loss moduli. The experimental results suggest that relying solely on the crystalline fraction is insufficient to model the rheology, while considering the microstructure at the spherulitic level could be more helpful. Additionally, the experiments enhance our understanding of the correlations between crystallization kinetics and its mechanical effects.
Article
Materials Science, Multidisciplinary
Ziwei Xu, Jingyi Deng, Yongjian Lai, Jianming Chen, Yirong Chen, Shijun Huang, Anfu Chen, Jingjing Zhang, Caihong Lei
Summary: This study investigates the exfoliation mechanism of graphene nanoplatelets (GNP) in polymer melts under elongational flow. The results show that the designed convergent-divergent channel can efficiently exfoliate GNP and significantly enhance the thermal conductivity of the composite material.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Xin Zhao, Xiangtong Meng, Hongqi Zou, Zhenhao Wang, Yadong Du, Yuan Shao, Jun Qi, Jieshan Qiu
Summary: A novel strategy to manipulate the surface topography of graphene oxide (GO) via electrostatic assembly coupled with in situ polymerizations of aniline is reported. The resulting composite material exhibits improved evaporation performance and efficiency, making it suitable for practical freshwater production.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Polymer Science
Shaoquan Zhao, Yang Yue, Xinxin Wang, Jiachun Feng
Summary: The microstructure evolution of SEBS/crystallizable paraffin gel during cooling and reheating was studied. It was found that an ordered BCC lattice formed at a higher temperature and disappeared with the crystallization of paraffin. During reheating, a new BCC lattice was formed. When the gel was heated to a lower temperature and cooled, the ordered BCC lattice immediately reappeared during paraffin remelting.
Article
Materials Science, Multidisciplinary
Hongwen Sun, Jiachun Feng
Summary: The study investigated the nucleation effect of the synthesized nucleating agent Ca-HHPA on PCL by different thermal treatments. The results showed that Ca-HHPA80-200 had a significantly improved nucleation efficiency compared to Ca-HHPA80 under similar dosages.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Sijia Ren, Jiachun Feng
Summary: This study presents a facile approach to prepare shape-morphing materials with diverse deformation modes by constructing bilayer structures of SEBS/paraffin blends with different melting temperatures. The shape deformation behaviors of the resultant bilayer films can be flexibly tuned by adjusting the programming method, stretching strain, and thickness ratio. The approach offers the advantages of low cost, easy preparation, recyclability, and high designability, making it versatile for various applications.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Engineering, Multidisciplinary
Xinyu Guo, Jiachun Feng
Summary: This paper presents a method for preparing passive thermal management (PTM) materials using heat-sensitive thermal expansion microspheres, which show great potential in thermal insulation applications.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Polymer Science
Hongwen Sun, Li Wang, Jianjun Yi, Fushan Wang, Yan Gao, Xuan Sha, Jiachun Feng
Summary: Constructing oriented crystals in products is an effective way to enhance the performance or function of semi-crystalline polymers. This study investigated the influence of melt temperature on the crystal orientation of talc-filled polypropylene. It was found that the crystal orientation of the samples varied significantly at different temperatures, and a probable mechanism for this variation was proposed.
Article
Polymer Science
Xinrao Zhang, Fuqing Wei, Zhuoni Wang, Guangquan Li, Shiyuan Yang, Jiachun Feng
Summary: Zinc stearate (ZnSt2) and calcium stearate (CaSt2) are widely used additives in the polymer industry, but the selection principle of these two soaps in different polyolefins is still unclear. This study systematically explored the structures and evolution behavior of these soaps in a polyolefin melt, and found that they exhibited different dispersed structures and evolution behavior in polypropylene random copolymer (PPR). These findings provide an important foundation for establishing the relationship between the structure and performance of these soaps in polyolefins.
Article
Materials Science, Multidisciplinary
Junyi Tang, Tianyu Xing, Jiachun Feng
Summary: A hydrogel-based dual encryption platform with self-erasure function is developed, which achieves high security level and reusability. The dual encryption is realized by combining 2D fluorescent information with pH-induced shape deformation of the hydrogel. The concealed information can be decrypted on demand by immersing the platform in a specific pH solution and exposing it to 254 nm irradiation, taking advantage of the hydrogel's shape recovery and fluorescence quenching. The carried information self-erases permanently with prolonged immersion time, ensuring information security.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Nanoscience & Nanotechnology
Xinyu Guo, Tianyu Xing, Jiachun Feng
Summary: A foam strain sensor with both stretchable and compressible properties was successfully fabricated by introducing oriented pores into a highly stretchable elastic composite. The foam sensor demonstrated high stretchability (-250%) and compressibility (-50%), enabling simultaneous monitoring of various human movements and facilitating human-computer interaction.
ACS APPLIED NANO MATERIALS
(2022)
Article
Materials Science, Composites
Xin Yang, Fuqing Wei, Zhuoni Wang, Guangquan Li, Shiyuan Yang, Jiachun Feng
Summary: A high-reactive silica nanosheet (HRN) compatibilizer was synthesized and its compatibilization effect was investigated. The HRN compatibilizer was fabricated by melt-blending amino functionalized silica hollow spheres (AHS) and poly(styrene-co-glycidyl methacrylate) (PSGMA) with high epoxy groups content. Addition of only 3% HRN compatibilizer significantly decreased the droplets size and dramatically improved the tensile strength and elongation at break of the blend.
COMPOSITES SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Sijia Ren, Jiachun Feng
Summary: In this study, reconfigurable and reprocessable thermadapt two-way shape memory polymers (2W-SMPs) were synthesized using polyethylene glycol and hydroxylated modified SBS through dynamic covalent bonding. The 2W-SMPs exhibit a good balance of mechanical properties and a favorable two-way shape memory effect (2W-SME) with a reversible actuation strain of 11.9%. These materials can be reprocessed and transformed into complex 3D shapes due to the dynamic covalent exchange and reversible physical crosslinking. Furthermore, a biomimetic mimosa actuator that can undergo shape changes through finger contact and cooling was manufactured. This study provides a new idea for the development of thermadapt 2W-SMPs and shows great potential applications in intelligent actuators.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Materials Science, Multidisciplinary
Sijia Chen, Junyi Tang, Jiachun Feng
Summary: A simple and environmentally-friendly strategy to prepare a polyvinyl alcohol/chitosan-based (PVA/CS-based) hydrogel with high mechanical strength and excellent swelling resistance was proposed. The hydrogel was formed by introducing tannic acid (TA) as well as through hydrogen bonding crosslinking and ionic crosslinking induced by sodium citrate solution immersion. The resulting hydrogel exhibited superior mechanical strength and swelling resistance performance.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Sijia Chen, Jiachun Feng
Summary: This study proposes a facile solvent regulation strategy for preparing highly robust physical eutectogels. The resulting eutectogel exhibits excellent mechanical properties due to the formation of a uniform and dense polymer cross-linked network. This high-performance eutectogel can be used as a strain sensor with high sensitivity and can exhibit directional muscle-like stretching performance through mechanical training.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Polymer Science
Huiqin Liu, Jiachun Feng
Summary: In this work, the influence of calcium pimelate (CaPim) as a nucleating agent on the crystallization behavior of PPS was investigated. The results showed that the addition of CaPim significantly enhanced the crystallization rate and temperature of PPS. This suggests that CaPim holds promise as an effective nucleating agent for PPS.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Junyi Tang, Tianyu Xing, Sijia Chen, Jiachun Feng
Summary: In this study, a tough double-network hydrogel is developed as a dual-encryption platform. The hydrogel exhibits high security level and advantages of rewritability, reprogrammability, and reusability. It also possesses excellent mechanical properties and water retention capacity, making it suitable for information security protection.
Article
Materials Science, Multidisciplinary
Xinyu Guo, Tianyu Xing, Yanqin Huang, Jiachun Feng
Summary: In this study, a flexible porous phase change foaming film (PCFF) was prepared through a one-step extrusion casting-foaming method. The PCFF exhibited excellent antibacterial performance, temperature stability, and flexibility, making it a promising option for personalized healthcare applications in wearable thermotherapy fields.
MATERIALS ADVANCES
(2023)
Article
Polymer Science
Yuanzhang Jiang, Xuyi Wang, Yanting Han, Dakai Gong, Yingchun Gu, Lin Tan
Summary: In this study, FeCl3 and poly(acrylic acid) (PAA) were doped into waterborne polyurethanes (WPUs) to create multifunctional materials with self-healing and antimicrobial properties. WPU/Fe/PAA-5.5, containing 5.5 wt % PAA, exhibited excellent mechanical properties, strong self-healing capabilities, and an impressive antimicrobial rate of over 90%. These supramolecular films were also highly recyclable through hot-pressing.
Article
Polymer Science
Longyu Tian, Min Wang, Guangming Liao, Baoliang Liu, Sujuan Zhang, Yucheng Sun, Zhen Meng, Jintao Zhang, Zaijun Lu
Summary: Two kinds of benzoxazine monomers were synthesized and used to prepare polybenzoxazine anion exchange membranes (AEMs) with quaternary ammonium functionalization. The LQPBZ AEM exhibited better ion conductivity and alkaline stability.
Article
Polymer Science
Claire A. Lemarchand
Summary: This study investigates the shock behavior of three different polymers through molecular dynamics simulations. The results reveal specificities in the shock behavior of polymers, including deviations from the linear relation between shock velocity and particle velocity, as well as differences in shear stress relaxation behind the shock front. It is found that the deviation of the Hugoniot locus is related to the change in the relative contribution of bonding and non-bonding potential energies, while polymers with higher glass transition temperatures exhibit slower shear stress relaxation.
Article
Polymer Science
Zengquan Liu, Xiaochun Yin, He Zhang, Shuo Gao, Qinglin Kuang, Yanhong Feng
Summary: A powder solid-state extension (PSSE) technology was proposed to address the high melt viscosity issue of UHMWPE. By uniaxial extension and sintering in the solid state, a highly self-reinforced material was prepared. X-ray diffraction and scattering techniques were used to study the structural evolution during the PSSE process, and a solid-phase induced transformation model was established.
Article
Polymer Science
Zhike Li, Anyu Luo, Rui Zhou, Xin Li, Haiyan Li
Summary: A novel high temperature resistance IL@SiO2 nanocapsules were successfully prepared and their friction and wear properties in PA6 composites were studied. The addition of IL@SiO2 nanocapsules reduced the friction coefficient and wear rate without affecting the mechanical properties of PA6. The synergy between the IL core and SiO2 wall in the nanocapsules improved the self-lubricating performance of the PA6 composites.
Article
Polymer Science
Xin Liu, Xuhong Guo, Qi Liao
Summary: In this study, an algorithm for accurately estimating viscosity is developed using molecular dynamics simulations and the Green-Kubo formula. This algorithm can be applied to complex systems with long correlations, such as macromolecular and biological simulation systems.
Article
Polymer Science
Hao Pu, Yun-Lei Hou, Jing -Zhou Chen, Dong -Lin Zhao
Summary: The use of modified graphene improves the interfacial adherence of carbon fibers to epoxy resin, resulting in enhanced interfacial and bending properties of CF and matrix in CF/EP composites, as well as increased interlaminar shear strength and flexural strength.
Article
Polymer Science
Wei-Chung Ke, Jin-Wei Lin, Manohar Reddy Busireddy, Yueh-Hsing Lee, Jiun-Tai Chen, Chain-Shu Hsu
Summary: This study introduces a crosslinkable monomer, TAIC, to synthesize three crosslinked polyimide films, which exhibit improved thermal, mechanical, and dielectric properties. The introduction of TAIC enhances the tensile strength, reduces the dielectric constant and dielectric loss, and decreases the coefficient of thermal expansion of the polyimide films.
Article
Polymer Science
Alex Kwasi Kumi, Ruiling Fan, Ye Chen, Yumei Zhang
Summary: The difference in leaching of amylopectin from cellulose/amylopectin/1-butyl-3-methylimidazolium chloride ([Bmim][Cl]) blends during regeneration in water and aqueous ethanol has been studied. Molecular dynamics simulations showed that the dissolution and regeneration mechanisms of amylopectin in [Bmim][Cl] are similar to cellulose in ionic liquids. Water regeneration leads to weak electrostatic interactions, resulting in high leaching of amylopectin. In contrast, ethanol-water interactions enhance electrostatic interactions among amylopectin chains, limiting amylopectin leaching in aqueous ethanol.
Article
Polymer Science
Xi Zeng, Junwei Zhou, Junbiao Peng, Chunsheng Zhang, Danling Wang, Yihu Song, Qiang Zheng
Summary: This study utilizes an oligomer deep eutectic solvent (DES) based on polyethylene glycol to regulate the vulcanization kinetics of rubber. The results show that the DES can accelerate vulcanization at low temperatures without affecting the crosslinking density and Mullins effect.
Article
Polymer Science
Qianqian Yue, Yongfei Peng, Xingjian Liu, Aihua He, Huarong Nie
Summary: The addition of metal deactivators can effectively suppress the aging of TBIR, prolong its lifespan, and have no negative effects on its physical and processing properties. These research findings are of great importance for improving the stability and aging resistance of polymers.
Article
Polymer Science
J. Gomez-Caturla, J. Ivorra-Martinez, R. Tejada-Oliveros, V Moreno, D. Garcia-Garcia, R. Balart
Summary: This work focuses on the development of environmentally friendly PLA formulations by using different esters derived from geraniol as plasticizers. The results show that these esters have good compatibility with PLA, and they can effectively enhance the elongation and plasticity of PLA, reduce its glass transition temperature, and slightly improve its water absorption capabilities.
Article
Polymer Science
Dandan Li, Zhaohui Lu, Zhao Ke, Ke Xu, Fengna Dai, Youhai Yu, Guangtao Qian, Chunhai Chen
Summary: In this study, cross-linked PI aerogel membranes with low dielectric constant and high moisture resistance were prepared by co-polymerization and scraping coating technology. The incorporation of fluorinated blocks and benzimidazole ring structures resulted in novel PI aerogel membranes with fascinating dielectric properties and outstanding moisture resistance.
Article
Polymer Science
Zhaoyang Chu, Qing Zhang, Haihua Luo, Han Zhou, Fapei Zhang, Wei Chen, Wenhua Zhang
Summary: Multi-physical fields solution processing strategy is a universal and facile method for preparing various conjugated polymer films and high-performance devices. In this study, we employed a combined microfluidic flow and ultrasonication strategy (FU) for processing CP solutions, and found a pronounced synergetic effect in promoting the pre-ordering of chains in solution. The conformation order and anisotropy of the solution were revealed through various characterizations. A non-classical nucleation model for polymer crystallization in non-equilibrium solution processing was confirmed. The roles of microfluidic flow and ultrasonication in chain aggregation and crystallization were addressed through multi-physical simulations. Compared to pristine solutions, the FU strategy showed improved solution anisotropy and crystallization kinetics, resulting in higher crystallinity in films and increased mobilities in OFET devices. The FU processing strategy provides a universal approach for regulating chain conformation and aggregation in conjugated polymer solutions.
