CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Yao Yan,Chengpeng Zhang,Junjie Guo,Guozhang Gu,Guoxiang Zou,Rong Yang
Flame-retardant modification of polymer materials often compromises their robustness and toughness due to poor interfacial compatibility between flame retardants and the polymer matrix. In this work, we report reinforced, toughened, and flame-retardant polylactic acid (PLA) blends fabricated via reactive blending with methyl vinyl silicone rubber (MVQ), ammonium polyphosphate (APP), 1-oxo-2,6,7-trioxa-1-phosphabicyclo[2.2.2]octane-4-acrylate (PEPAA), and triglycidyl isocyanurate (TGIC). MVQ serves as a toughening agent, while APP and PEPAA constitute an intumescent flame retardant (IFR) system. TGIC reacts with APP, introducing epoxy groups that enhance compatibility with the PLA matrix. During injection molding, the MVQ rubber phase becomes well oriented within the PLA matrix, contributing to improvements in both tensile and impact strength. With 3 wt% TGIC, the PLA blend exhibits a tensile strength of 61.8 MPa and an impact strength of 34.1 kJ/m 2 . Meanwhile, the limiting oxygen index (LOI) increases to 32.5%, and all samples achieve a UL-94 V-0 rating. Furthermore, the blends demonstrate reduced heat release, smoke production, and enhanced water resistance. This study presents a strategy for obtaining reinforced and toughened flame-retardant PLA blends by tailoring interfacial compatibility.
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高影响因子
COLLOID AND POLYMER SCIENCE
·
2025
·
IF 2.3
Tumrani Sadam Hussain,Sharma Bharat Prasad,Otho Ali Raza,Ayob Eman A.,Amin Mohammed A.,Soliman Mohamed Mohamed,Soomro Razium Ali,Karakuş Selcan
The environmental impact of biodegradable microplastics (BMPs) is profoundly influenced by aging-induced surface transformations, yet their interactions with persistent organic pollutants, such as perfluorooctanoic acid (PFOA), remain poorly understood. This work investigates how aging polylactic acid (PLA), a common BMP, in simulated surface water for 80 days alters its physicochemical properties and behavior towards PFOA. Aging triggered oxidative and hydrolytic degradation, leading to pronounced morphological changes, including increased surface roughness, hydrophilicity, and oxygen-to-carbon (O/C) ratio from 0.82 to 1.28. These transformations introduced hydroxyl and carboxyl functional groups, shifting the PFOA adsorption mechanism from physisorption (in fresh PLA) to chemisorption (in aged PLA) via stronger electrostatic interactions and hydrogen bonding. Additionally, kinetic and isotherm analyses revealed a tenfold increase in PFOA monolayer adsorption capacity for aged PLA (PLA-80) compared to pristine PLA. Density functional theory (DFT) calculations corroborated these findings, demonstrating a reduced HOMO–LUMO energy gap upon PFOA adsorption, indicative of enhanced electronic reactivity and charge transfer. Topological analysis further identified multiple hydrogen-bonding sites, confirming the dominance of electrostatic forces in pollutant retention. These results underscore the critical role of aging in amplifying BMPs’ environmental reactivity, emphasizing the urgent need to incorporate aging processes into risk assessments for biodegradable plastics.
研究领域:
环境科学
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材料科学
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高影响因子
RSC Advances
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2025
·Vol. 15
·期 45
·38294-38306
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IF 4.6
Siqi Ren,Dongfang Fan,Qian Zhang,Yunhong Jiao,Jianzhong Xu,Jixing Xie
Lignin, a natural macromolecule rich in aromatic rings and hydroxyl groups, holds significant promise in environmentally friendly applications. In this study, a lignin-based flame retardant (lignin–diethylenetriamine–phytic acid, P2N-lig) was synthesized through a Mannich reaction between alkali lignin and diethylenetriamine to introduce nitrogen, followed by phosphorylation with phytic acid to incorporate phosphorus. When P2N-lig were added into PLA composites (T-PLA) which were toughened by TPU and MMT, the T-PLA/P2N-lig composites demonstrated enhanced physicochemical and flame-retardant properties. The 9 wt% T-PLA/P2N-lig formulation exhibited acceptable mechanical performance alongside significantly improved thermal stability and fire resistance, achieving a 39.27% reduction in peak heat release rate (pHRR), a 22.88% decrease in total heat release (THR), and a UL-94 V-0 rating. Further evaluation of 3D-printed specimens revealed that the 6 wt% P2N-lig formulation achieved a limiting oxygen index (LOI) >24%, a UL-94 V-2 classification, and minimal mechanical degradation, demonstrating suitability for 3D printing applications.
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
·
IF 6.3
Chunyan Luo,Haibo Che,Bingzhe Jia,Xinrui Qiang,Jiarui Li,Lei Wang,Jiale Wang,Yichi Liu,Zhiqiang Li,Xinming Wu
MXene all-solid-state supercapacitors show significant potential for various applications, however, the poor cycling stability under bending stresses restricts their feasibility in commercial use. To address this challenge, a flexible PLA/MXene electrode material with excellent cycling stability was prepared. Electrochemical testing revealed that the PLA/MXene electrode material exhibited a capacity retention of 96.3% after 10,000 cycles under 5 A/g current density. Furthermore, asymmetric all-solid-state supercapacitors, constructed with PLA/MXene film electrodes, retain 92.3% of their initial capacitance after 2,000 charge-discharge cycles at bending angles of 0°, 30°, 60°, and 90°, respectively. The significant improvement suggests that trace amounts of PLA can enhance the cycling stability of MXene electrodes compared to the 84.7% capacitance retention observed in MXene-based supercapacitors. This work provides a straightforward approach to fabricating future flexible wearable devices.
研究领域:
纳米材料科学
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能源存储技术
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柔性电子器件
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高影响因子
POLYMER COMPOSITES
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2025
·
IF 4.7
Xintu Lin,Ruijie Jin,XinYi Li,Jingjing Kou,Ruilan Xu,Xin Dai,Shangxi Zhang,Yong Peng,Yuejun Liu
Low-thickness, eco-friendly electromagnetic interference (EMI) shielding materials with high shielding effectiveness (SE) are urgently needed to address escalating electromagnetic pollution in miniaturized electronic devices. Herein, we synthesized silver nanoparticle-decorated multiwalled carbon nanotubes (MWCNTs@Ag) via a rapid solvent-free method and integrated them into poly(lactic acid) (PLA) matrices to fabricate composite films through solution casting. The resulting PLA/MWCNTs@Ag composite film containing 10 wt% MWCNTs@Ag achieves an average EMI SE of 18.59 dB at a thickness of approximately 95 μm, with the shielding mechanism dominated by surface reflection. To strategically control EMI attenuation pathways, multilayered architectures were engineered using layer-by-layer solution casting while maintaining identical filler content. Systematic analysis reveals that both thickness and layer number significantly influence EMI shielding performance. Notably, a multilayer film with a thickness of approximately 155 μm and seven layers exhibits an average EMI SE of 24.43 dB with an absorption-dominated mechanism, showing a 31.41% enhancement over single-layer counterparts. This performance transition from reflection to absorption dominance originates from optimized impedance matching, enhanced interfacial polarization, multiple internal reflections, and reconstructed conductive networks enabled by structural design. The synergy between hierarchical structure engineering and hybrid filler incorporation provides new insights for developing sustainable high-performance EMI shielding materials.
研究领域:
材料科学
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纳米技术
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电磁学
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聚合物复合材料
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环境工程
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2025
·
IF 2.8
Changqing Peng,Dongmei Xie,Hongzhi Liu
Previous works have demonstrated that diisocyanate-induced dynamic vulcanization of difunctional fatty acid is an effective and promising strategy to highly toughen PLA. However, the effect of diisocyanate structure on the toughening of PLA remains unclear. For this sake, three diisocyanates with different molecular structures, that is, hexamethylene diisocyanate (HDI), 4,4-diphenylmethane diisocyanate (MDI), and dicyclohexylmethane 4,4′-diisocyanate (HMDI), were chosen to induce dynamic vulcanization of hydrogenated dimer acid (HDA) in the presence of PLA. The reaction rates of the diisocyanates with HDA were found to follow the following order: HDI > MDI > HMDI. The higher reactivity of diisocyanates resulted in better interfacial compatibility between the in situ formed polyamide elastomer and PLA components. PLA blends utilizing MDI or HMDI with cyclic structural units have superior tensile strength (TS) and tensile modulus (TM) but minimal improvement in tensile ductility. Among the three PLA blends, the PLA/(HDA + HDI) blend exhibited a bi-continuous morphology and the highest toughness, with an elongation at break of 283.4% and a notched impact strength of 80.1 kJ/m 2 . This work would offer guidance for the development of high-performance PLA blends prepared by dynamic vulcanization of reactive monomers.
研究领域:
高分子科学
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材料工程
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化学反应
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纳米复合材料
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力学性能
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
·
IF 5.4
Mingfang Sun,Jun Wang,Jun Kang,Yaxin Zhao,Huafeng Tian,Yujuan Jin,Rakesh Kumar,Junfeng Wang
This study utilizes electrospinning to develop bio-based fibrous films composed of zein and polylactic acid (PLA), with chitosan added in varying concentrations. The resulting films exhibit remarkable filtration efficiency, capturing over 95 % of airborne pollutants, while maintaining a low pressure drop of less than 4 mbar. A key innovation in this work is the integration of chitosan. Chitosan, a naturally derived polysaccharide, significantly increases the conductivity and viscosity of the spinning solution, enhancing interactions among PLA, chitosan, and protein molecules. This leads to a robust network structure with improved hydrophobicity and a bimodal structure, both essential for maintaining high filtration efficiency without reducing breathability. The addition of chitosan effectively addresses the common issue of high pressure drop in PLA/zein composite films, improving the product's efficiency and practicality for air filtration applications. Furthermore, the inherent mechanical strength and ductility of chitosan contribute to the fibrous films' overall durability and functionality. These properties make chitosan-modified zein/PLA fibers highly suitable for air pollution control, especially in personal protective equipment. This research underscores the potential of chitosan-enhanced bio-based materials as sustainable and effective solutions for advanced air filtration technologies.
研究领域:
材料科学
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环境科学
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生物工程
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高影响因子
POLYMER DEGRADATION AND STABILITY
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2024
·
IF 6.3
Qiuyang Liu,Rulin Yang,Bingzhe Dong,Hongguang Sun,Guangqiang Xu,Qinggang Wang
The depolymerization of waste plastics into high-value products is a promising solution to address the plastic crisis. Among this field, catalytic activity and selectivity of depolymerization catalyst are of great concerns. Accordingly, in this work, a simple catalytic system was explored in detail to achieve the fast and selective chemical recycling of PLA into methyl lactate. Using commercially available M[bis(trimethylsilyl)amide] (MHMDS, M = Li, Na, K) as catalysts, the depolymerization of PLA was completed within a few minutes at room temperature. The selectivity and optical purity of the depolymerized product methyl lactate are greater than 99 %. The effect of conditions such as metal center, catalyst form, and solvent on depolymerization was investigated. Moreover, the gram-grade depolymerization, selective depolymerization of blended or mixed PLA plastic, and the recyclability of catalyst were further explored. This work accomplishes the path of highly selective and active depolymerization of PLA under mild conditions, thereby promoting sustainable development of PLA.
研究领域:
材料科学
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环境科学
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化学工程
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高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Peng Deng,Fangdan Xu,Yuyang Zhou,Lili Wang
Polylactic acid (PLA) is a promising biodegradable polymer, however conventional disperse dyeing departs it from eco-friendly conception; the limited compatibility with bio-based dyes also leads to the low durability of colour and functionality. This study presents an effective strategy for fabricating durably golden yellow and UV protective PLA integrating quercetin (Qc) and formaldehyde-free crosslinker (Trimethylolpropane tris-2-methyl-1-aziridinepropionate, TTMAP). Results show that a notable increase in the K/S of PLA from 5.83 to 14.97 takes place when the TTMAP concentration escalates from 0 to 5 g/L under the help of methyl cinnamate (MC) and deep eutectic solvent(DES). Under optimal condition, the fabricated PLA displays a shining golden appearance and UV shielding property, with colour fading rate of 6% and well maintained UPF50+ rating after five cycles of washing. The mechanism study reveals that the enhanced adhesion between Qc and PLA by TTMAP is a combining effect of chemical crosslinking and physical encapsulation. In all, the method developed in this research not only pushes forward the development of next generation bio-based PLA product approaching to the targets of sustainable textile industry and global carbon neutralization, but is also transferable to the surface modification of PLA material in other fields such as medical care, functional composite, packaging.
研究领域:
材料科学
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纺织工程
·
生物化学
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高影响因子
JOURNAL OF POLYMER SCIENCE
·
2025
·
IF 3.6
Xinjiao Wang,Ping Liu,Xiaohong Chen,Honglei Zhou
The strength and hydrophilicity of nanofiber materials for tissue engineering have always been a significant challenge. This paper presents the design and preparation of PLA&Gel/PHBV core–sheath nanofibers that combine strength and super hydrophilicity using electrospinning technology. Compared to the original materials, the addition of gelatin simultaneously enhances both the strength and hydrophilicity of the materials, with the mechanical and hydrophilic properties of PLA&20 wt%Gel/PHBV nanofibers reaching optimal values of 7.45 MPa and 2.2°, respectively. The increase in strength is attributed to the entanglement effect caused by the gelatin molecular chains, which hinders the relative sliding of the molecular chains. The enhancement in hydrophilicity is due to the introduction of a large number of hydrophilic groups from Gel, improving the material's hydrophilicity. Additionally, the polar groups in gelatin and the emergence of a network pore structure significantly increase the material's water absorption rate. This work provides new insights into the design and preparation of nanofiber materials. Graphical A design and preparation method of electrospun fiber membranes with high strength and toughness and super-hydrophilicity.
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高影响因子
JOURNAL OF POROUS MATERIALS
·
2024
·
IF 2.5
Pawar Chander Amgoth,Luo David Xu,Rokkala Divya,Bura Raju,Bhagyalaxmi Gundeti,Rani Rampilla Sudha,Mannam Krishna Veni,Babu Kothamasu Suresh
We present, a facile method for the synthesis of block co-polymer (BCP) of [(PLA)- b -(Car)], (PLA-Poly Lactic acid and Car-Carbazole). BCP results in the design and development of cone and ice-cream cup-shaped frustums with nanoscale porosity for bio-sensing and drug delivery applications. [(PLA)- b -(Car)] was conjugated through condensation polymerization between amine proton and hydroxyl groups of PLA and Car. Thermoplastic PLA is responsible for desired size, shape, and porosity over the surface. The size, shape, and morphology of the [(PLA)- b -(Car)] are tunable based on suitable solvents and thermal treatment. Interestingly, design of nanoporous hollow (half-broken coconut type) capsules has been carried out without using any precursors and surfactants. Synthesis of [(PLA)- b -(Car)] has been confirmed through the Fourier transform infrared (FTIR), nuclear magnetic resonance ( 1 H NMR). However, the morphology and surface properties of capsules were confirmed through field emission scanning electron microscopy (FE-SEM), Bruner Emmett Teller (BET), and atomic force microscopy (AFM) characterizations. The capsule size ranges from ~ 200 nm to 1 μm (in diameter) and porosity scales from ~ 60 to 80 nm. The hollow and porous surface of the capsules with biosensing and drug delivery applications can be considered as a unique and novel characteristic property of our invention. This kind of novel cone and ice cream cup-shaped hollow frustums can be used as a stimuli-responsive catalytic activity through the fluorescence measurement of cysteine and gold nanoparticle [(Cys)-(Au + )] for enhanced payload and biomedical applications.
研究领域:
材料科学
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生物医学工程
·
化学工程
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高影响因子
JOURNAL OF CONTROLLED RELEASE
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2014
·
IF 7.261
Yang Liu,Yan-Hua Zhu,Cheng-Qiong Mao,Shuang Dou,Song Shen,Zi-Bin Tan,Jun Wang
There is no effective clinical therapy yet for triple-negative breast cancer (TNBC) without particular human epidermal growth factor receptor-2, estrogen and progesterone receptor expression. In this study, we report a molecularly targeted and synthetic lethality-based siRNA therapy for TNBC treatment, using cationic lipid assisted poly(ethylene glycol)- b -poly( d , l -lactide) (PEG-PLA) nanoparticles as the siRNA carrier. It is demonstrated that only in c-Myc overexpressed TNBC cells, while not in normal mammary epithelial cells, delivery of siRNA targeting cyclin-dependent kinase 1 (CDK1) with the nanoparticle carrier (NP siCDK1 ) induces cell viability decreasing and cell apoptosis through RNAi-mediated CDK1 expression inhibition, indicating the synthetic lethality between c-Myc with CDK1 in TNBC cells. Moreover, systemic delivery of NP siCDK1 is able to suppress tumor growth in mice bearing SUM149 and BT549 xenograft and cause no systemic toxicity or activate the innate immune response, suggesting the therapeutic promise with such nanoparticles carrying siCDK1 for c-Myc overexpressed triple negative breast cancer .
研究领域:
肿瘤学
·
分子生物学
·
药学
·
纳米技术
·
癌症治疗
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）