Macromolecular Research最新文献

{"title":"Effective photo-crosslinking behavior of cinnamate-terminated star-shaped polylactides","authors":"Kazunari Masutani,&nbsp;Hiroko Nakayama,&nbsp;Yoshiharu Kimura,&nbsp;Chan Woo Lee","doi":"10.1007/s13233-024-00272-8","DOIUrl":"10.1007/s13233-024-00272-8","url":null,"abstract":"<div><p>Star-shaped poly(<span>l</span>-lactide) (starPLLA) and poly(<span>d</span>-lactide) (starPDLA) were synthesized, and their terminal groups were capped with cinnamate functionalities to obtain cinnamate-terminated star-shaped polylactides (C-starPLLA and C-starPDLA). It was confirmed that both starPLLA and C-starPLLA showed better solubility in various organic solvents than their corresponding linear polylactides. Polymer films of C-starPLLA and its blends with C-starPDLA (C-starPLLA/PDLA) were effectively crosslinked by UV irradiation. The molecular weights of the films were found to become higher when the irradiation was done after annealing the films, suggesting that the increased polymer crystallization by the annealing ought to promote the concentration of the cinnamate functionalities in the amorphous domain, inducing the subsequent terminal photo-crosslinking more efficiently. Furthermore, the aqueous emulsions of C-nPLAs and C-starPLAs were successfully prepared and used for fabrication of their films by emulsion casting. When the resultant polymer films were annealed and UV-irradiated, the film was found to become much harder due to the higher degree of crosslinking. These results supported that the star-shaped structure with photo-crosslinkable terminals should be an effective approach to provide PLAs having improved processability and properties simultaneously.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><img></picture></div></div></figure></div><p>Star-shaped poly(L-lactide) (starPLLA) and poly(D-lactide) (starPDLA) were synthesized, and their terminal groups were capped with cinnamate functionalities to obtain cinnamate-terminated star-shaped polylactides (C-starPLLA and C-starPDLA). It was confirmed that both starPLLA and C-starPLLA showed better solubility in various organic solvents than their corresponding linear polylactides. Polymer films of C-starPLLA and its blend with C-starPDLA (C-starPLLA/PDLA) were effectively crosslinked by UV irradiation. These results supported that the star-shaped structure with photo-crosslinkable terminals should be an effective approach to provide PLAs having improved processability and properties simultaneously.</p></div>","PeriodicalId":688,"journal":{"name":"Macromolecular Research","volume":"32 8","pages":"811 - 822"},"PeriodicalIF":2.8,"publicationDate":"2024-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141513581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of functional modification on the thermal and mechanical properties of h-BN/epoxy nanocomposites","authors":"Chengdi Xiao,&nbsp;Wenqiang Shu,&nbsp;Zhenguo Xing,&nbsp;Haitao Zhang,&nbsp;Xixin Rao","doi":"10.1007/s13233-024-00275-5","DOIUrl":"10.1007/s13233-024-00275-5","url":null,"abstract":"<div><p>Continual miniaturization and increased power density of microelectronic devices lead to greater heat generation, necessitating the use of thermal interface materials with superior thermal conductivity to ensure device reliability and safety. This study utilizes non-equilibrium molecular dynamics (NEMD) simulations to investigate the enhancement mechanisms of thermodynamic and mechanical properties in hexagonal boron nitride/epoxy resin (<i>h</i>-BN/EP) composites upon the addition of aliphatic (C₅H₁₂O), covalent (silane coupling agent KH560), and non-covalent (dopamine, DA) functional groups. The results indicate that functionalizing <i>h</i>-BN with these groups significantly enhances the thermal conductivity of the epoxy composites, especially when two types of functional groups are used simultaneously. In particular, composites modified with KH560-treated DA exhibited the highest increase in thermal conductivity, achieving 0.761 W·m⁻¹·K⁻¹ with only 10% vol <i>h</i>-BN filler. Additionally, the dual-modified composites also showed a significant improvement in Young's modulus, reaching 7.908 Gpa, an increase of 26.97% over traditional EP. Vibrational density of states (VDOS) analysis confirmed that the aromatic and covalent structures in the functional groups facilitate thermal dissipation. This study offers critical theoretical insights into the improved heat transfer and filler-interface interactions in functionalized <i>h</i>-BN/EP composites, providing a foundation for developing high-performance thermal management materials in advanced electronic systems.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div><div><p>Comparison of thermal and mechanical properties of epoxy resin composites after functional group modification</p></div></div></figure></div></div>","PeriodicalId":688,"journal":{"name":"Macromolecular Research","volume":"32 9","pages":"911 - 927"},"PeriodicalIF":2.8,"publicationDate":"2024-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141506012","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of the effective parameters on the electrospinning of polyvinyl alcohol–chitosan nanofibers using response surface methodology (RSM)","authors":"Alireza Rezaei,&nbsp;Seyed Mojtaba Zebarjad","doi":"10.1007/s13233-024-00284-4","DOIUrl":"10.1007/s13233-024-00284-4","url":null,"abstract":"<div><p>How to produce and fabricate polyvinyl alcohol–chitosan (PVA/CS) electrospun nanofibers to investigate the diameter and morphology of the fibers produced by experimental design software was investigated. The effects of voltage (14.32–17.05 kV), feed rate (0.2–2 ml/min), and PVA/CS mixing ratio (50–100 wt%) were studied to obtain optimal electrospinning conditions to achieve the minimum diameter and number of beads. Central Composite Design (CCD) was used to investigate and optimize the processing factors of PVA/CS nanofiber production. The nanofibers were examined using Scanning Electron Microscopy (SEM) and Fourier-Transform Infrared Spectroscopy (FTIR). Nanofibers with diameters ranging from 40 to 250 nm were obtained. The presence of PVA/CS and functional compounds related to both substances in the resulting infrared spectra was confirmed. The results of CCD showed the effect of each variable on the diameter and quality of the fibers and finally suggested the optimal conditions.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":688,"journal":{"name":"Macromolecular Research","volume":"32 10","pages":"1005 - 1027"},"PeriodicalIF":2.8,"publicationDate":"2024-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141513613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Injectable hyaluronic acid–cyclodextrin-based hydrogels for localized and sustained release of anticancer drugs","authors":"Dinh Trung Nguyen,&nbsp;Le Hang Dang,&nbsp;Hai Khoa Le,&nbsp;Lien Tuyet Ngan,&nbsp;Ngoc Quyen Tran,&nbsp;Ki Dong Park,&nbsp;Phuong Le Thi","doi":"10.1007/s13233-024-00262-w","DOIUrl":"10.1007/s13233-024-00262-w","url":null,"abstract":"<div><p>Chemotherapy is the most popular anti-cancer therapy; however, it usually leads to severe side effects to healthy organs because of its high cytotoxicity and poor lesion selectivity. Although various smart carriers have been developed to provide beneficial properties for the local delivery of chemotherapy, it remains challenges in the efficiency and sustained release of drugs. Injectable hydrogels are more advantageous over other drug delivery systems owing to their unique properties, such as non-invasive administration, easy drug loading and locally controlled release at the target sites. Herein, “click” reaction between thiolated hyaluronic (HA–SH) and cyclodextrin–vinyl sulfone (CD–VS) has been used to formulate an injectable hydrogel system for the local delivery of an anticancer drug (Doxorubicin) to cancer cells. This strategy can rapidly induce hydrogelation, while increasing the loading, retention, and sustained release of DOX at the tumor sites through the formation of inclusion complexes between drugs and cyclodextrin. The physico-chemical features of hydrogels, such as gelation time, swelling ratio, porosity, and degradation rate were investigated by varying the concentrations of CD–VS crosslinker. The sustained and pH-sensitive release of DOX from hydrogels were also examined. Finally, the cell viability of the blank hydrogel, free DOX, and DOX-loaded hydrogel was studied by WST-1 and live/dead assay on HELA cells, which exhibited excellent biocompatibility of blank hydrogel and a dose-dependent cytotoxicity of DOX-loaded hydrogels. Therefore, this HA-based hydrogel will be a potential injectable carrier for the targeted and sustained delivery of chemotherapy drugs in cancer treatment.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":688,"journal":{"name":"Macromolecular Research","volume":"32 8","pages":"777 - 788"},"PeriodicalIF":2.8,"publicationDate":"2024-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141513583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Controlled synthesis and optical investigation of conjugated rod-coil diblock copolymer based on poly(3-hexylthiophene) and poly(2-(dimethylamino)ethyl methacrylate-random-1-pyrenylmethyl methacrylate-random-methacrylate spirooxazine)","authors":"Luan Thanh Nguyen,&nbsp;Hai Le Tran,&nbsp;Tam Hoang Luu,&nbsp;Duong Le Thanh,&nbsp;Cam Hong Thi Nguyen,&nbsp;Thao Phuong Le Nguyen,&nbsp;Tam Huu Nguyen,&nbsp;Chau Duc Tran,&nbsp;Le-Thu T. Nguyen,&nbsp;Quoc Thiet Nguyen,&nbsp;Mai Ha Hoang,&nbsp;Ha Tran Nguyen","doi":"10.1007/s13233-024-00285-3","DOIUrl":"10.1007/s13233-024-00285-3","url":null,"abstract":"<div><p>This research presents a conjugated rod–coil diblock copolymer P3HT-<i>b</i>-P(DMAEMA-<i>r</i>-PyMA-<i>r</i>-MSp) which was synthesized by a combination of the Kumada catalyst-transfer polymerization and ATRP method of co-monomers including 2-(dimethylamino)ethyl methacrylate (DMAEMA), 1-pyrenylmethyl methacrylate (PyMA) and methacrylate spirooxazine (MSp). The synthesized copolymer P3HT-<i>b</i>-P(DMAEMA-<i>r</i>-PyMA-<i>r</i>-MSp) revealed a controlled molecular weight of 12,200 g/mol with a dispersity index of 1.16. The chemical structure of the diblock polymer was confirmed via ¹H NMR and FTIR spectroscopies. In addition, its optical and thermal properties were also investigated via differential scanning calorimetry (DSC), UV–Vis and photoluminescence spectroscopies. The influence of solvent polarity on the conformational states and optical properties of the regioregular P3HT chains was examined.</p><h3>Graphical abstract</h3><p>Multi-responsive conjugated rod-coil block copolymers have attracted due to their response to external signals, resulting in structure, shape, and property changes in the coil segments. This class of copolymers combines the tunable structural control and photophysical properties of conjugated rods with the self-assembly behavior and physical properties of block copolymers. The morphologies of block copolymers have been extensively researched, attracting fundamental and application-oriented interests. The diblock copolymers with hydrophilic and hydrophobic segments exhibit distinct natures that give rise to unique phase behaviors in nanometer dimensions, leading to a broad range of applications, including data recording, optical switching, drug delivery systems, and sensors. In this research, a rod-coil diblock copolymer P3HT-b-P(DMAEMA-r-PyMA-r-MSp) which was synthesized by a combination of the Kumada catalyst-transfer polymerization and ATRP polymerization of co-monomers including 2-(dimethylamino)ethyl methacrylate (DMAEMA), 1-pyrenylmethyl methacrylate (PyMA) and methacrylate spirooxazine (MSp). The synthesized diblock polymer P3HT-b-P(DMAEMA-r-PyMA-r-MSp) reveals a controlled molecular weight of 15200 g/mol with a dispersity index of 1.16. The chemical structure of the diblock copolymer was confirmed via 1H NMR and FTIR spectroscopies. In addition, its optical and thermal properties were also investigated through differential scanning calorimetry (DSC) and UV-Vis spectroscopies.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":688,"journal":{"name":"Macromolecular Research","volume":"32 10","pages":"959 - 970"},"PeriodicalIF":2.8,"publicationDate":"2024-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141513589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Temperature and oxidation-responsive nanomicelle based on polyethyleneimine and (phenylthio)acrylic acid","authors":"Kwanjira Wangpimool,&nbsp;Kritika Rana,&nbsp;Hyeon Ki Son,&nbsp;Jin-Chul Kim","doi":"10.1007/s13233-024-00278-2","DOIUrl":"10.1007/s13233-024-00278-2","url":null,"abstract":"<div><p>Polyethyleneimine (PEI), a cationic hydrophilic polymer, and (phenylthio)acrylic acid (PTAA), a hydrophobic counter ion, were used to prepare ion pair self-assembly (IPSAM), which is sensitive to temperature and oxidation. The IPSAM was spontaneously formed when the amino group to carboxylic group molar ratio was 5/5 to 7/3. On the TEM micrograph, PEI/PTAA IPSAM was discovered as sphere-shaped nanoparticles with a diameter of tens of nanometers. The upper critical solution temperature (UCST) of the ion pair increased as the PTAA content increased and decreased when H₂O₂ oxidized the PTAA of the ion pair. The ion pair was interface active due to its amphiphilic property and the interface activity was decreased upon the PTAA oxidation. FT-IR and ¹H NMR spectroscopy were used to verify the ionic interaction among PEI and PTAA, and X-ray photoelectron microscopy was used to confirm the oxidation of PTAA. The release of a payload (i.e. Nile red) in IPSAM was limited when the medium temperature was lower than the UCST but it was triggered above the phase transition temperature possibly due to the disintegration of the IPSAM. Upon oxidation, the UCST would decrease below the release medium temperature due to the PTAA oxidation causing promoted release and the release degree could occur readily in proportion to the H₂O₂ concentration.</p><h3>Graphical abstract</h3><p>Schematic diagram of temperature and oxidation-responsive of PEI/PTAA self-assembly ion pairs (IPSAM)</p>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":688,"journal":{"name":"Macromolecular Research","volume":"32 9","pages":"897 - 910"},"PeriodicalIF":2.8,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141350037","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Statistical modeling of polyester filament yarn evenness with respect to some melt spinning parameters","authors":"Mohammadreza Mohammadzamani,&nbsp;Hossein Tavanai,&nbsp;Komeil Nasouri","doi":"10.1007/s13233-024-00283-5","DOIUrl":"10.1007/s13233-024-00283-5","url":null,"abstract":"<div><p>This study deals with employing central composite design (CCD) as a design of experiment (DoE) tool for finding an appropriate model representing the evenness of polyester fully drawn yarn (FDY). Main effects of parameters like melt temperature, quenching air velocity, winding speed, draw ratio, and the position of the bobbin on the coefficient of variation (CV) of the FDY were examined. The interactions between significant factors were detected by the analysis of variance. CCD model showed that the quenching air velocity has no significant effects on the CV values. The special effects of the winding speed and melt temperature are higher than that of draw ratio and the position of the bobbin. Final model predicted the minimum CV values of 1.72–1.78% at 15 melt spinning conditions. Optimal CV value (1.72%) was achieved at the melt temperature of 283.8 °C, quenching air velocity of 41.0 m/s, winding speed of 4391.7 m/min, draw ratio of 2.89, and the position of 0°. It was also revealed that the average tensile strength of the PET filament yarns decreases from 44.73 ± 1.13 to 40.50 ± 0.81 cN/tex as the unevenness increases from 1.8 to 3.0. These results indicated that the CCD is well capable of analyzing, modeling, and optimizing the evenness of the PET filament yarns.</p><h3>Graphical abstract</h3><p>A lay out of melt spinning process and the variation of CV versus quenching speed and temperature.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":688,"journal":{"name":"Macromolecular Research","volume":"32 10","pages":"1029 - 1039"},"PeriodicalIF":2.8,"publicationDate":"2024-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141373626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Structural evolution of anodized TiO2 nanotubes and their solar energy applications","authors":"Heesu Kim,&nbsp;Jeongin Lim,&nbsp;Young Un Jeon,&nbsp;Minji Park,&nbsp;Yuhyeon Yang,&nbsp;Seulki Song","doi":"10.1007/s13233-024-00282-6","DOIUrl":"10.1007/s13233-024-00282-6","url":null,"abstract":"<div><p>TiO₂ is one of the most important materials in modern industrial societies because of its outstanding chemical and electrical properties. Many properties of TiO₂, including its charge transport behaviors, grain boundaries, surface-to-volume ratio, and contact with surrounding systems, are strongly influenced by its nanoscale architecture. In this regard, TiO₂ nanotubes produced by anodization have received extensive attention as a promising TiO₂ architecture because of their unique one-dimensional configuration that includes well-defined nanostructures with a vertical orientation. These architectural features enable efficient charge transport along the axial direction. However, early anodized TiO₂ nanotubes suffered several drawbacks including limited substrate and singly open-ended nanostructure restrict their further applications. To address these challenges, researchers have developed advanced TiO₂ nanotubes, and several TiO₂ nanotube structures, including freestanding membranes, doubly open-ended nanotubes, and hierarchical structures, have been reported, and these TiO₂ nanotubes have exhibited enhanced performance in various applications. In this article, we review recent advances in the structural developments of anodized TiO₂ nanotubes and the applications of these materials in the field of solar energy.</p><h3>Graphical abstract</h3><p>Schematic diagram of the characteristics and applications of TiO₂ nanotubes.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":688,"journal":{"name":"Macromolecular Research","volume":"32 7","pages":"607 - 629"},"PeriodicalIF":2.8,"publicationDate":"2024-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141258588","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Diazinon removal from aqueous solution via grape branch-derived cellulose nanocrystals/polyethersulfone nanocomposite membrane: performance, characterization, and modeling","authors":"Zhaleh Yousefi,&nbsp;Seyyed Alireza Mousavi,&nbsp;Aliakbar Zinatizadeh,&nbsp;Parviz Mohammadi,&nbsp;Danial Nayeri","doi":"10.1007/s13233-024-00273-7","DOIUrl":"10.1007/s13233-024-00273-7","url":null,"abstract":"<div><p>In this study, amino functionalized cellulose nanocrystals–polyethersulfone nanocomposite membrane (A-CNC/PES) based on agricultural waste was used for the removal of diazinon (DZ) from aqueous solution. The fabricated membrane has been characterized via attenuated total reflectance-Fourier transform infrared (ATR-FTIR), scanning electron microscopy (SEM), dispersive X-ray spectrometer (EDX), X-ray diffractometer (XRD), thermal gravimetric analysis (TGA), water contact angel (WCA), porosity, and mean pore radius. The effect of variables, such as initial DZ concentration, pH, and A-CNC content, on the membrane performance was optimized using response surface methodology (RSM) through central composite design (CCD). The results indicated that the additive had the most significant effect on the hydrophilicity improvement, reducing surface roughness, and reducing fouling. The highest removal efficiency of A-CNC/PES membrane for DZ was about 99.3% (at A-CNC: 0.2 wt%), and more than three-fold water flux improvement (27.3 versus 8.3 kg/m².h for unmodified membrane) was attained. The results of antifouling test confirmed that the A-CNC/PES membranes had a high-flux recovery (FRR: 90.05%). This study may provide promising insights for the development of next generation of agricultural waste-based nanocomposite membrane in the water and wastewater treatment.</p><h3>Graphical abstract</h3><p>Highly efficient removal of diazinon pesticide from aqueous solutions by using grape branch-derived CNCs-PES nanocomposite membrane.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":688,"journal":{"name":"Macromolecular Research","volume":"32 9","pages":"833 - 852"},"PeriodicalIF":2.8,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141258357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reduced interfacial thermal resistance in acidic alumina-filled adhesives for heat dissipative applications","authors":"Dong-In Shin,&nbsp;Jisung Lee,&nbsp;Chanseul Kim,&nbsp;Sung Woo Lee,&nbsp;So-Yeon Yoon,&nbsp;Ye-Jin Shin,&nbsp;Sooyeol Jeong,&nbsp;Gi-Ra Yi,&nbsp;Seung-Young Park,&nbsp;Gaehang Lee","doi":"10.1007/s13233-024-00276-4","DOIUrl":"10.1007/s13233-024-00276-4","url":null,"abstract":"<div><p>Interfacial thermal resistance is crucial for determining the thermal conductivity of composites. Existing studies have explored hybrid filler systems and surface modification of alumina (Al₂O₃) particles for enhancing the thermal conductivities of polymer composites. In this study, highly acidic Al₂O₃ fillers were fabricated by modifying the raw Al₂O₃ surface using citric acid and glucose; the modified Al₂O₃ infiltrated an uncured epoxy adhesive at a concentration of 80 wt.%. The measured thermal conductivities of composites were up to 19.4% and 35.9% higher in glucose-filled and citric acid-filled Al₂O₃, respectively, compared with the raw Al₂O₃ at 25 °C. The experimental analysis and theoretical calculations revealed that the polar functionality on the surface facilitated hydrogen bonding between the filler and epoxy resin, which reduced the interfacial thermal resistance in the composite; this effect was the highest for the carboxyl group. To demonstrate the practical application of the modification technique, the exothermic performance test was conducted and indicated that a light-emitting diode lamp incorporating the citric acid filler-based composite exhibited excellent heat management performance compared to the raw Al₂O₃-applied composite.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div><div><p>Acidic Al₂O₃ fillers were prepared to reduce interfacial thermal resistance through hydrogen bonding, resulting in a modified particle-filled epoxy composite with enhanced thermal conductivity. The light-emitting diode (LED) lamp, utilizing epoxy adhesive with these modified Al₂O₃ fillers, demonstrated excellent heat dissipation capabilities</p></div></div></figure></div></div>","PeriodicalId":688,"journal":{"name":"Macromolecular Research","volume":"32 9","pages":"885 - 895"},"PeriodicalIF":2.8,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141258058","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}