POLYMER DEGRADATION AND STABILITY
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2025
·
IF 7.4
Xiaoyuan Liu,Jia Liu,Xinyi Bao,Wenqing Ge,Zhihui Lv,Li Dang
To overcome the critical challenges of high smoke toxicity and flammability in flexible polyvinyl chloride (fPVC), this study developed a core-shell flame retardant (MOSw@PDA@NiOOH) via polydopamine (PDA) interfacial engineering and in-situ NiOOH deposition on magnesium oxysulfate whiskers (MOSw). SEM, TEM, and EDS confirm the hierarchical interface structure with Ni(III)-based NiOOH nanoparticles uniformly anchored on MOSw surfaces. Cone calorimetry tests show a 35.38% reduction in peak smoke production rate and a 75.88% decrease in total smoke production, respectively, for fPVC/MOSw@PDA@NiOOH compared to fPVC/MOSw composite, along with a UL-94 V-0 rating and 28.8% limiting oxygen index. Raman, TGA, and XPS analyses reveal that: i) the strong Lewis acidity of Ni(III) facilitates chloride elimination from PVC, leading to the formation of conjugated polyene structures; ii) the powerful oxidizing capability of Ni(III) directly oxidizes unsaturated carbons such as C=C, generating carbocations that subsequently promote aromatization and cross-linking reactions; iii) Ni(III) induces complete decomposition of MOSw into MgO, ultimately forming a dense carbonaceous residue layer composed of graphitic carbon, MgO, NiO, and MgCl 2 . Py-GC/MS and TGA-FTIR analyses further demonstrate that the strong oxidative capacity of Ni(III) also promotes deep cleavage and oxidation of aromatic/aliphatic intermediates, which significantly reduces the accumulation of smoke precursors. Moreover, both the Ni(III) and its reduced Ni(II) possess partially filled 3d orbitals capable of scavenging gas-phase radicals (e.g., H· and HO·), thereby interrupting combustion chain reactions and imparting flame-retardant efficacy. Additionally, PDA’s amino/hydroxyl groups strengthen the MOSw-PVC interface via hydrogen bonding, increasing tensile modulus (20.9 MPa) and strength (17.8 MPa) while maintaining impact strength (83.9 kJ/m 2 ). This work establishes a multifunctional design strategy that simultaneously achieves flame retardancy, smoke suppression, and mechanical reinforcement in fPVC composites through synergistic interfacial and catalytic effects.
研究领域:
材料科学
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高分子科学
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化学工程
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纳米技术
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消防安全工程
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表面化学
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分析化学
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物理化学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Heshun Jing,Qingtai Xie,Huijuan Su,Yuqi Zhai,Xun Sun,Baorong Duan,Lijun Zhao,Miao Zhang,Caixia Qi,Libo Sun
The research and progress of noble metal catalysts possessing good stability and extended service life holds significant importance in enhancing catalytic efficiency, reducing enterprise costs, and fostering sustainable social development. Here, a hollow magnetic h-Au/PDA@PDA@Fe 3 O 4 catalyst with a double-layer PDA structure was prepared to optimize the stability of gold nanoparticles (NPs) using for the 4-nitrophenol (4-NP) reduction. The research indicates that, despite the initial activity of h-Au/PDA@PDA@Fe 3 O 4 , with a mass-normalized rate ( k’ ) of 176.10 s −1 ·g Au -1 and a Turn Over Frequency (TOF) of 1757 h −1 , being smaller than h-Au/PDA@Fe 3 O 4 with a single-layer structure ( k’ = 461.76 s −1 ·g Au -1 , TOF = 6387 h −1 ), h-Au/PDA@PDA@Fe 3 O 4 exhibits significantly superior stability compared to h-Au/PDA@Fe 3 O 4 . After undergoing 12 cycles of use, the conversion rate of h-Au/PDA@PDA@Fe 3 O 4 decreased by only 4.3 %. After cyclic reaction, the conversion rate of h-Au/PDA@Fe 3 O 4 decreased by as much as 64.8 %. The distinctive hollow double-layer structure of h-Au/PDA@PDA@Fe 3 O 4 , along with the interaction between Au and PDA, contributes significantly to its exceptional activity and stability. The research presented in this paper offers valuable insights and guidance for the suitable construction and industrial application of gold-based nano catalyst with good activity and cyclic stability.
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DOI
高影响因子
Arabian Journal of Chemistry
·
2023
·
IF 6
Aijing Li,Xinpeng Chen,Ping Yao,Jun Zhang,Tieling Xing,Guoqiang Chen
In this work, polydopamine (PDA) was used to facilitate the reduction of silver nitrate (AgNO 3 ) to silver nanoparticles (AgNPs) and the simultaneous loading on waste silk fabrics (PDA-SF/AgNPs). The removal activity of the obtained composite PDA-SF/AgNPs on different dyes in the presence of hydrogen peroxide (H 2 O 2 ) and potassium peroxymonosulfate (PMS) was compared. The effects of reaction temperature, H 2 O 2 /PMS dosage, dye concentration, composite dosage, electrolyte concentration and time in two catalyst systems on the dye removal were discussed. The results showed the dye removal of Telon Red A2R reached 81% and 95% in 30–50 min in PDA-SF/AgNPs-H 2 O 2 and PDA-SF/AgNPs-PMS system, respectively. Quenching experiments demonstrated that ·OH, ·O 2 – and SO 4 - · were produced during the degradation process, and the possible degradation pathway of Telon Red A2R were analyzed by HPLC-MS. In addition, the kinetic study indicated that the removal of dye followed quasi-second-order adsorption kinetics. These findings suggest that fabric-based composites have great potential and applications in catalysis and treatment of wastewater.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
POLYMER
·
2026
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IF 5.1
Meng Ma,Dezhong Wang,Yan Liao,Sicheng Huang,Si Chen,Yanqin Shi,Huiwen He,Yulu Zhu,Xu Wang
Cellulose nanofibers (CNF) feature a three-dimensional nanofiber network, excellent mechanical properties, and abundant surface hydroxyl groups, facilitating the integration of boron nitride (BN) for fabricating flexible composite films with high thermal conductivity. However, achieving a balance between high thermal conductivity and strong mechanical strength at high BN loadings remains a formidable challenge. A mussel-inspired strategy is employed, in which BNNS-OH and CNF are coated with polydopamine (PDA) to improve their interfacial adhesion and compatibility. The PDA-BNNS-OH is then silanized with 3-aminopropyltriethoxysilane to acquire a positive charge, enabling its subsequent electrostatic adsorption onto PDA-CNF and assembly into a robust film. At a high filler loading of 60 wt%, the resultant composite film achieves an outstanding in-plane thermal conductivity of 18.9 W m −1 K −1 , a 1250% improvement relative to the pure CNF film. Remarkably, this marked enhancement is achieved without compromising the film's high electrical insulation capability, as evidenced by a volume resistivity exceeding 10 11 Ω m, while still delivering a substantial tensile strength of 49.5 MPa. These synergistic enhancements are attributed to the optimized interfacial bonding, which effectively reduces thermal resistance and suppresses phonon scattering. This interface design strategy offers a promising pathway for developing advanced thermal management materials.
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DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Chen Chen,Haibao Ma,Kaiqing Lu,Xiaoxuan Zhang,Baiqiao Yue,Ce Song,Pochong Huang,Haifeng Cheng,Yue Lin
Controlling the microstructure of semiconducting polymers is critical for optimizing thermoelectric performance, yet remains challenging, requiring complex processing techniques like alignment. In this study, a straightforward strategy is introduced to enhance the thermoelectric properties of semi-crystalline polymer films by incorporating minimal amounts of nucleating agents, a method widely used in traditional polymer industries. By blending less than 1 wt% of N,N′-(1,4-phenyl)diisonicotinamide (PDA) into poly(2,5-bis(3-alkylthiophen-2-yl)thieno[3,2-b]thiophene) (PBTTT-C14), controlled modulation of crystallization behavior is achieved, resulting in reduced structural disorder and enhanced charge carrier mobility. Systematic investigations reveal that an optimal PDA loading of 0.9 wt% increases the crystallization degree by 45% compared to pristine PBTTT-C14 films. Under these optimized conditions, the PDA-modified PBTTT-C14 films exhibit a maximum electrical conductivity of 1,894 S cm −1 and a maximum power factor of 176 µW m −1 K −2 , showing improvements of 96% and 433%, respectively, over doped pristine PBTTT-C14 films. These gains are attributed to the synergistic effects of polymer chain extension and reduced grain boundary resistance, which collectively enhance charge transport efficiency. Additionally, ion exchange doping is found to maintain a high charge carrier concentration while preserving the crystallinity introduced by PDA, paving the way for advanced thermoelectric materials and next-generation polymer-based electronics.
研究领域:
材料科学
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高分子化学
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产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Jun Zhang,Chao Hou,He Yu,Md All Amin Newton,Binjie Xin,Tingxiao Li
To address persistent challenges in wound care, including exudate management, infection prevention, and healing monitoring, this study developed a multifunctional fiber dressing using electrospinning technology. The system integrates a patterned hydrophobic polylactic acid/zinc oxide (PLA/ZnO) inner layer providing antimicrobial protection and exudate drainage; a polyacrylonitrile/polydopamine (PAN/PDA) intermediate water transport layer enabling unidirectional exudate transfer; and an outer PAN-based functional membrane incorporating sodium polyacrylate (SPA), phenol red (PSP), and tetracycline hydrochloride (TCH) for controlled drug release and visual wound status monitoring. The comprehensive evaluation revealed exceptional performance: rapid exudate removal within 3.35 s, 96 h sustained antibacterial drug release (68.6% cumulative release), pH-responsive chromatic transition (yellow-to-red at pH 5–9), and significant antimicrobial efficacy against Escherichia coli and Staphylococcus aureus (inhibition zone diameters of 10 and 18 mm, respectively). The dressing exhibited a balance of mechanical strength (6.1 MPa tensile strength) and breathability (13.4 mm/s air permeability rate). By integrating three core functions─efficient exudate management, antimicrobial regulation, and intelligent healing monitoring─this multifunctional architecture demonstrates clinical applicability in postoperative care and chronic wound therapy.
研究领域:
生物材料学
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伤口护理
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药剂学
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产品关联
DOI
PubMed
高影响因子
COLLOID AND POLYMER SCIENCE
·
2019
·Vol. 297
·期 10
·1301-1311
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IF 1.906
Liu Pin,Qi Chenze,Gao Yong
Colloidosomes have gained intensive attention in the past years due to their substantial applications in wide scopes involving encapsulation, catalysis, and drug delivery, etc. In this study, we depicted the templated fabrication of well-shaped colloidosomes with tunable shell thickness by Pickering emulsion at a mild condition. To this end, toluene-in-water Pickering emulsion stabilized by cetyltrimethylammonium bromide (CTAB)–modified polydopamine (PDA) nanoparticles (PDA@CTAB) was prepared. After the covalent cross-linking of PDA nanoparticles assembled on the surface of an oil droplet through chemical reactions occurring in toluene phase, exclusive intra-colloidosomes were afforded. The shell thickness of colloidsomes could be roughly tuned by the adjustment of the amount of the reactive monomers in the oil phase. Our investigations revealed that CTAB was critical for the successful fabrication of well-shaped colloidosomes. Otherwise, only irregular structures were obtained if pristine PDA–stabilized Pickering emulsion was applied. The current strategy could enable hydrophobic cargo, such as 10-hydroxycamptothecin to be encapsulated while colloidosomes were created. The release behavior of the encapsulated cargoes was also investigated.
CTAB was necessary for the templated fabrication of well-shaped colloidosomes by PDA-stabilized oil-in-water Pickering emulsion
研究领域:
材料科学
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药物递送
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2021
·Vol. 32
·期 21
·26189-26201
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IF 2.478
Zhang Xian-Hui,Liu Jun-Jun,Zha Liang-Liang,Chen Ji-Wei,Chen Bao,Wu Jian-Hua,Yu Hong-Liang
MnZn ferrites and their magnetic, electrical, and optical properties make them highly suitable in a number of applications. These ferrites are used in electronic applications, magnetic fluids, and household appliances such as washing machines, refrigerators, and microwave ovens. This paper focuses on a hydrothermal method used to prepare a bayberry spherical manganese–zinc ferrite (Mn 0.5 Zn 0.5 Fe 2 O 4 ), its surface was coated with dopamine (Mn 0.5 Zn 0.5 Fe 2 O 4 @PDA) and then carbonized to obtain the core–shell structure C-Mn 0.5 Zn 0.5 Fe 2 O 4 @PDA. Preliminary results show that carbon-coated manganese–zinc ferrite with saturation magnetic properties and coercivity increased from 99 emu and 66.01 Oe to 138 emu and 104.85 Oe, respectively. In addition, the carbonized Mn 0.5 Zn 0.5 Fe 2 O 4 @PDA (C-Mn 0.5 Zn 0.5 Fe 2 O 4 @PDA) exhibited favorable microwave absorbing performance with minimum reflection loss (RL min ) of − 17.56 dB and also revealed that the broadest effective absorption bandwidth (RL min ≤ − 10 dB) 5.36 GHz (11.70–17.06 GHz) can be achieved at 2.0 mm.
研究领域:
材料科学
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物理学
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产品关联
DOI
高影响因子
International Journal of Nanomedicine
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2023
·
IF 8
Juanjuan Xu,Yuanpei Li,Haojie Wang,Mengxi Zhu,Wenpo Feng,Gaofeng Liang
Background The biofilms could protect bacteria from antibiotics and promote the production of drug-resistant strains, making the bacteria more difficult to be eradicated. Thus, we developed an AMP@PDA@AgNPs nanocomposite, which is formed by modifying silver nanoparticles (AgNPs) with antimicrobial peptides (AMP) modified nanocomposite to destroy biofilm in this study.Methods The AMP@PDA@AgNPs nanocomposite was prepared with polymerization method and characterized by using ultraviolet-visible (UV-vis) spectroscopy, dynamic light scattering (DLS), Fourier transform-infrared spectroscopy (FT-IR), and transmission electron microscope (TEM). The antibacterial effects of the nanocomposite were investigated by using agar diffusion method and minimum inhibitory concentration (MIC) test. The quantitative analysis of the biofilm formation by the nanocomposite was conducted using crystal violet staining and confocal laser scanning microscope (CLSM).Results The DLS and TEM analysis showed it was a spherical nanocomposite with 200 nm size and well dispersed . The results of UV-vis and FT-IR confirmed the presence of AMP and AgNPs. The nanocomposite had an excellent biocompatibility at 100 μg/mL. And the AMP@PDA@AgNPs nanocomposite showed superior antimicrobial activity against both Gram-negative (E. coli, P. aeruginosa) and Gram-positive (S. aureus) bacteria than AgNPs or AMP. Importantly, the mRNA expression of biofilm-related genes were decreased under the action of the nanocomposites.Conclusion An AMP@PDA@AgNPs nanocomposite with good biocompatibility was successfully prepared. The nanocomposite could destruct bacterial biofilms by inhibiting the expression of biofilm-related genes. The synergistic strategy of AMPs and AgNPs could provide a new perspective for the treatment of bacterial infection.
研究领域:
纳米技术
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微生物学
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材料科学
✓ 已验证
DOI
PubMed
高影响因子
POLYHEDRON
·
2025
·
IF 2.6
Jiaojiao Luo,Yifan Liang,Jian-Ying Lin,Huiling Fan
Bacterial infections pose a significant threat to global public health, and the presence of bacterial biofilms complicates the treatment of these infections. Therefore, the development of materials with both antibacterial and antibiofilm properties is crucial. In this study, we designed a composite material that combines chemical and photothermal antibacterial functions using a zeolitic imidazolate framework (ZIF-8) and protocatechuic acid (PCA). PCA-ZIF was synthesized by immersing ZIF-8 in a PCA solution, followed by surface encapsulation with polydopamine (PDA) through dopamine polymerization to enhance its photothermal therapy potential. This process yielded PCA-ZIF@PDA, which can generate localized hyperthermia and gradually release PCA to achieve multimodal antibacterial activity. The structure of the composite was characterized using XRD, FTIR, SEM, and BET, and its photothermal performance under 808 nm laser irradiation, drug release profile, and in vitro antibacterial efficacy were also evaluated. The results indicated that the immersion of PCA did not alter the crystal structure of ZIF-8, however, the polydopamine (PDA) coating significantly reduced its crystallinity. The PCA loading capacities were measured at 253.7 mg⋅g −1 for PCA-ZIF and 209.2 mg⋅g −1 for PCA-ZIF@PDA. The photothermal conversion efficiency of the 1 mg⋅mL −1 sample under 808 nm irradiation was found to be 61.4 %. Under near-infrared irradiation and acidic conditions (pH 5.0), the cumulative drug release from PCA-ZIF@PDA reached 91 % after 12 h. Antibacterial experiments demonstrated that PCA-ZIF@PDA effectively killed E. coli and S. aureus , inhibited their growth, and significantly prevented biofilm formation.
研究领域:
材料科学
·
微生物学
·
药理学
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Materials
·
2025
·
IF 2.9
Liwu Fu,Jiangfeng Hu,Peng Luo,Dong Xiang,Wenying Hui,Lei Cheng,Yan Zhou,Xiong Zhengrong,Dengzun Yao,Xianghai Jing
The white weathering layer materials that can effectively block the entire solar light band is of great importance for improving the service life, safety, and reliability of the materials. In this work, CsxWO3@PDA was prepared by in situ polymerization to achieve high absorption in the full spectral range and increase the compatibility between CsxWO3 particles and polyvinylidene fluoride (PVDF). PVDF composite films with different particle contents were prepared through compounding with titanium dioxide (TiO2) and CsxWO3@PDA. The prepared composite films were characterized by FT-IR, field emission scanning electron microscopy, universal material testing machine, whiteness meter, and ultraviolet visible spectroscopy. The results showed that the CsPVDF composite films with CsxWO3@PDA and TiO2 exhibited a whiteness level higher than 74, a transmittance of less than 5% in the wavelength range of 200–2500 nm, and a transmittance close to zero in the range below 1750 nm, demonstrating excellent shielding effect. The xenon lamp aging test also confirmed that the composite films had excellent weather resistance after aging 500 h. At the same time, adding a certain amount of CsxWO3@PDA could improve the tensile strength of PVDF.
研究领域:
材料科学
·
聚合物工程
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产品关联
DOI
高影响因子
DYES AND PIGMENTS
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2022
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IF 5.122
Ming Cao,Yuanyuan Zhang,Meisong Xu,Qiannian Dong,Tianyi Chen,Ru Xia,Jiasheng Qian
Colorful aluminum pigments are commercial demand for the pursuit of a range of aesthetic over the last few years. In this study, a general approach for preparation of colored aluminum pigments is reported by two-step process of poly(dopamine) (PDA) encapsulation and dye conjugation. Firstly, the surface of the aluminum pigment was encapsulated by a PDA layer in an alkaline/ethanol environment (PDA@Al), and orthogonal experiments were investigated to explore the optimal reaction conditions. Secondly, using Disperse orange 11 as typical dye, the PDA@Al were colored by the Michael addition reaction between the functional dyes and quinone structures in the PDA layer. The morphology, component and structure of the colored aluminum pigments was characterized by FTIR, SEM , XPS and TG. The results showed that the corrosion resistance and wettability of colored aluminum pigments were significantly improved. This wok provides a new general strategy for the preparation of colorful aluminum pigments with PDA as the protected and functional layer.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）