JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Zhang Chenyuan,Liu Zhiqiang,Zhang Zhijia,Zhou Wenjun,Zhang Songsong,Wang Guojun,Wang Qiang,Ma Teng,Wang Lin,Wei Hao
Self-healing research based on commercial polymeric materials (such as polyurethane) is beneficial to sustainable development by prolonging the life of materials. However, developing polymeric materials that integrate robust mechanical properties with self-healing ability at ambient temperature remains a formidable challenge. The formation of polymeric materials by physically and chemically dual crosslinking structures is a powerful method to improve mechanical properties. Herein, a series of dual crosslinking self-healing polyurethane have been designed and successfully synthesized by incorporating 2-ureido-4[1H]-pyrimidinone (UPy) units and triethanolamine (TEOA) into the polymer networks. Relying on the reinforcement of chemical crosslinking which is induced by TEOA, the resulting polyurethane exhibited robust strength of 10.3 MPa and elongation at break of 569.4%, which are quite prominent compared with previous reports. At the same time, the recombination of hydrogen bonds makes the polyurethane with UPy structure achieve rapid self-healing after 24 h at 40°C and the strength recovered to 4.98 MPa. This work provided a novel way to fabricate sustainable polyurethane with robust mechanical properties.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 26
·e55566
·
IF 2.7
Lingzhi Wang,Hua Liu,Haojie Wang,Birong Zeng,Xiaohui Liu,Yiting Xu,Weiang Luo,Guorong Chen,Conghui Yuan,Lizong Dai
Carbon dots (CDs) are a novel class of carbon material which have gained widespread usages owing to their exceptional optical properties, low toxicity, and high biocompatibility. The nitrogen-doped carbon dots (N-CDs) using a normal curing agent of 4,4′-diaminodiphenylmethane as resource was expected to not only have good compatibility with epoxy resin (EP), but also bring luminescent property to EP composites. It was interesting that the N-CDs-EP composites with 12.5 wt% addition exhibited a limiting oxygen index value of 31.4% and reached UL-94 V-1 grade, indicating a good flame retardancy. Compared with pure EP, the incorporation of N-CDs formed more residual char and had extra smoke suppression effect. Besides, the N-CDs-EP composites exhibited a low transmittance less than 10% for the light wavelength below 490 nm. The N-CDs contributed to the light shielding capabilities of the N-CDs-EP composites, which could effectively shield purple, blue, and cyan light. Furthermore, the mechanical properties including bending strength and impact strength, the dielectric property, and hydrophobicity of N-CDs-EP composites were also improved. The simple but effective modification strategy might be expected to be applied in many polymer systems.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Xiaowei Tan,Ziyi Liu,Cuiling Ouyang,Minxin Deng,Jingyi Xiao,Shufen Xiao,Tuo Huang,Siyu Yu,Hezhang Chen,Hui Chu,Jian Chen
Chitosan (CS)-based drug delivery systems often face challenges in obtaining clinical approval. Enhancing the binding affinity of CS-based carriers to target cells, such as tumor cells, is crucial for their translation from bench to bedside. Strategies like crosslinking (NHS-disulfide-NHS) and utilizing materials like albumin have proven effective in strengthening interactions between CS-based nanoparticles and tumor cells, thereby enhancing cellular uptake (cellular avidity). This study presents a novel approach using crosslinked CS nanoparticles loaded with doxorubicin, featuring reduction-responsive drug release and albumin coating. The albumin-coated crosslinked chitosan (ACCC) was assembled via reaction between amino of CS/albumin and NHS-disulfide-NHS. The resulting ACCC nanoparticle micelles demonstrate enhanced stability of the micelles. The hybrid crosslinked network ensures stability while providing ample space for drug loading and achieves reduction-responsive drug release through disulfide bond crosslinking. Moreover, the proposed system possesses excellent biocompatibility. Compared to uncoated crosslinked chitosan nanoparticle micelles, ACCC nanoparticle micelles exhibit potent cytotoxicity against tumor cells, particularly in reducing environment. Fluorescence imaging and flow cytometry analyses confirm the enhanced cellular affinity conferred by albumin coating. These findings underscore the potential of ACCC nanoparticles in improving tumor cell adhesion and anti-tumor efficacy, thus offering promising prospects for translational medicine in CS-based drug delivery.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 24
·e55511
·
IF 2.7
Shuxin Zheng,Yuxiang Nie,Zhangzhong Wang,Xin Feng,Jiahua Zhu,Xiaohua Lu,Liwen Mu
This work presents a design of a unique “roller wheel” structure combining rigid MXene and flexible liquid metal (LM), aiming to construct an epoxy composite coating with simultaneous advanced mechanical strength and lubrication properties. The antiwear property of the epoxy composites is improved by 72.8% when the LM is 0.5 wt% and MXene is 0.03 wt%. The incorporation of LM-MXene improved the mechanical properties of the epoxy composite coating, resulting in an approximately 136.6% increase in elastic modulus. The unique “roller wheel” structure provides additional mechanical support and leads to lower adhesion between the MXene layers and LM. As a result, LM reduces the stripping and sliding of the interface between MXene layers during the friction process, further enhancing the lubrication performance of the epoxy composite coating.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Miaotian Long,Zerui Zhang,Long Yan,Liang Yi
For effectively strengthening the comprehensive properties of intumescent flame-retardant epoxy resins (EPs), a microencapsulating γ-Fe 2 O 3 by polypyrrole (PPy) named PPy-Fe 2 O 3 was synthesized and used as a synergist to simultaneously enhance the flame retardancy, smoke toxicity suppression and mechanical strength of EP composites containing diaminodiphenylmethane modified ammonium polyphosphate (DDP). The results demonstrate that the mixture of PPy-Fe 2 O 3 and DDP exhibits a surprising synergistic effect on strengthening the comprehensive properties of EP composites. Specifically, EP composite containing 0.2 wt% PPy-Fe 2 O 3 and 9.8 wt% DDP achieves the UL94 V-0 rating with a limiting oxygen index (LOI) value of 35.5%, while 10 wt% DDP only imparts a UL94 V-1 rating and a LOI value of 34.0% to EP. Furthermore, 0.2 wt% PPy-Fe 2 O 3 shows a 11.0% reduction in peak smoke production rate and a 12.3% reduction in peak heat release rate of the EP/DDP system. The enhanced fire security of EP/DDP/PPy-Fe 2 O 3 is attributed to the formation of more phosphorus-rich structures retained in the char, thus reducing the release of harmful gases including NH 3 , CO, and CO 2 , and generating more incombustible gases including H 2 O to weaken burning intensity. Meanwhile, the satisfactory compatibility of PPy-Fe 2 O 3 with epoxy matrix imparts a superior mechanical strength to EP composites.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 43
·e56132
·
IF 2.7
Changbin Tan,Xuan Luo,Haiqing He,Shan He,Ruiyang Ren,Yang Xiao,Yuanyuan Fu,Shihong Huang,Yongjiang Cai,Yan Yang
The carbon nanotubes/zinc oxide (CNTs/ZnO) nanocomposites were immobilized on the poly(vinyl alcohol) (PVA) membrane for highly reutilization rate in photocatalytic degradation of RhodamineB (RhB) based on the combination of electrospinning and ultrasonication treatment. The results revealed that the CNTs are successfully compounded with ZnO, and the surface of nanofibers was uniformly covered with CNTs/ZnO nanoparticles. Under visible light irradiation, the CNTs/ZnO@PVA nanocomposites displayed excellent photocatalytic activity with 98.4% of RhB degradation rate within 3 h illumination. In comparison with pure PVA, and CNTs/ZnO with equivalent loading capacity on CNTs/ZnO@PVA film suspended in aqueous solution, the synthesized CNTs/ZnO@PVA film degrades RhB dye more efficiently. Furthermore, the photocatalytic activity of CNTs/ZnO@PVA nanocomposites did not change significantly even after five recycles, indicating a certain degree of reusability. The mechanism of enhanced photocatalytic activity was proposed. The as-prepared flexible CNTs/ZnO@PVA nanocomposites could be employed as a promising material for the practical photocatalytic degradation of wastewater.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Yucheng Zi,Dong Chen,Guochen Wang,Yuhong Ma,Wantai Yang
A simple strategy is proposed to offer styrene (St) copolymer with intrinsic and catalyst-free upcycling capability by incorporating α -methylstyrene (AMS) units into the copolymer poly(AMS -co- St) (PAS). Compared to polystyrene (PS), the PAS is more susceptible to depolymerizing into St and AMS monomers with higher yields at relatively lower temperature. The yield of liquid chemicals of PAS-4 (26.1 mol% AMS) is up to 93 wt% at 380°C, whereas that PS as control is 78 wt%. The reclaimed liquid chemicals of PAS-4 contain 58.4 wt% St and 37.7 wt% AMS, while the chemicals of PS contain 81.8 wt% St and 4.1 wt% AMS. The introduction of AMS units in PAS leads to a reduction in the liquid chemicals other than St and AMS monomers. The blends of PS and PAMS do not demonstrate the synergistic effect regarding facilitating the PS depolymerization. In addition, the properties of the new PASs prepared with the reclaimed monomers are comparable with those of the virgin PASs. This work proves the concept that recycling efficiency could be boosted by incorporating liable structural units into the copolymer chains and demonstrates a closed-loop of PS up-cycling.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 24
·e55510
·
IF 2.7
Jinlu Wang,Xiao Ruan,Kaixin Shen,Yijia Wang,Yan Zhang,Jiyan Liu,Xueqing Liu
In the present paper, crosslinked polyvinyl alcohol (PVA) membranes with high transparency and excellent flame retardancy were obtained by blending 2-methyl-2,5-dioxo-1,2-oxaphospholane (OP) with a PVA water solution at the molecular scale. Fourier transform infrared spectrometry and differential scanning calorimetry were used to investigate the crosslinking reaction. The surface morphology and micromechanical assessments of the membrane were examined using nanoindentation. The limited oxygen index (LOI) and vertical flame microscale combustion calorimetry, thermogravimetric analysis, scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), and x-ray photoelectron spectroscopy (XPS) were employed to evaluate the flame retardancy and reveal the corresponding mechanisms. It was found that OP reacted with PVA below 120°C. The crosslinked membranes have a rougher surface and higher hydrophilicity and lower hardness and modulus than pure PVA does. The crosslinked membranes exhibit enhanced flame retardancy and high transparency. The membrane passes the UL 94 V 0 rating with an LOI of 27.6% and achieves a transmittance of 90.2% when the OP content is 20 wt.%. The SEM, EDS, and XPS results demonstrate that the interaction between OP and PVA effectively promotes the formation of a continuous and stable char in the condensed phase.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Ruiyu Yuan,Yi Yang,Zhenhao Yao,Kan Zhang
In this study, we used vanillin and furfurylamine from renewable resources as starting materials and successfully synthesized an innovative derivative of bisbenzoxazine (MH-fa) using the Mannich reaction. We characterized the chemical structure of the newly synthesized bisbenzoxazine compound using high-resolution mass spectrometry (HR-MS) technology. The results of nuclear magnetic resonance spectroscopy (NMR) and Fourier transform infrared spectroscopy analysis (FT-IR) confirmed the successful synthesis of the target compound. The synthesis of the benzoxazine copolymer (MH-fa-co-DDM-BMI) was achieved by leveraging the reversibility of the Diels–Alder reaction between the MH-fa monomer and 4,4′-bismaleimide diphenylmethane (DDM-BMI). In addition, the investigation into the polymerization behavior of benzoxazine monomer and its corresponding main-chain copolymer was conducted employing differential scanning calorimetry (DSC) along with in situ FT-IR. We studied the thermal stability and combustion performance of two samples using thermogravimetric analysis (TGA) and microscale combustion calorimetry (MCC). The results revealed that the bio-based bisbenzoxazine exhibited excellent heat resistance and flame retardancy. Specifically, poly(MH-fa) exhibits a T d10 value of 350°C and a Y c value of 62.3% at 800°C. Furthermore, the material exhibits an extremely low heat release rate (20.4 J g −1 K −1 ), highlighting its potential applications in the field of high-efficiency flame retardant materials.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 40
·e56025
·
IF 2.7
Qingbiao Yang,Xiangyu Mei,Shuaida Shi,Kun Peng,Xiaoming Qi,M. D. Zahidul Islam,Xinyan Yang,Yinsong Si,Yaqin Fu
Ultralow- k materials with promising comprehensive performance to meet the increasing requirements of high-frequency communication are highly desired. Here, a cross-linked porous polymer SiCOH, synthesized via simple sol–gel method, was used as the filler to prepare SiCOH/PI composite films by physically blending, which demonstrates ultralow dielectric constant at high frequency. Notably, only 2.5% of SiCOH in the composite can significantly reduce the dielectric constant of PI from 3.0 to an ultralow value of 1.7 in the 9.5–12.4 GHz, together with a low dielectric loss of 0.029. Additionally, the SiCOH/PI composite maintains a high tensile strength of 82.4 MPa and a tensile modulus of 1.82 GPa, which is comparable to pure PI film. While the glass transition temperature ( T g ) increases to 370°C and the linear expansion coefficient is reduced to 30.7 ppm/°C, both of which are superior to those of pure PI film. Moreover, by introducing the hydrophobic SiCOH into PI, the contact angle of the composite films increased to 92.0°–99.0°. This simple and low-cost method not only effectively lowers the dielectric constant of PI but also improves the thermal stability, mechanical properties, and hydrophobic ability, greatly boosts the practical application of PI in high-frequency communication in the future.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Lijing Chen,Jianxin Wu,Yuxin Gu,Liang Liu,Yong Li,Xiaofeng Lin,Wenjing Lin,Lei Ji,Yanhong Peng,Guobin Yi
Acrylate had developed rapidly because of its excellent chemical resistance, high-gloss surface, and weather resistance. However, the poor heat resistance of acrylate limited its application in coatings. To overcome this problem, an organic–inorganic hybrid polymer of zirconium silicone resin (ZSR)-modified acrylate has been successfully synthesized by solution polymerization. The results indicated that the heat resistance of acrylate was significantly improved due to the Si O Si and Si O Zr structures of ZSR and the increased cross-linking density induced by ZSR. After the incorporation of ZSR, the decomposition temperatures of 5% of acrylate increased from 300.4 and 349.2°C. The performance of the ZSR/(P(MMA/BA)) showed no significant change in uniformly heating at 200°C for 24 h. The composite films showed hydrophobicity, with the contact angles increasing to more than 90°. The S4 sample displayed the outstanding comprehensive performance, that is, 5% weight loss at 341.3°C, water contact angle of 97.9°, elongation at break of 852%, and tensile strength of 9.9 MPa. The high-performance heat resistant coating is a promising material for application in architecture, decoration, and mechanical equipment.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 30
·e55692
·
IF 2.7
Yang Meng,Mengke Shi,Wenbo Feng,Lingji Zhang,Hongzhong Zhang,Xiaojing Zhang
This study prepares a series of hollow-structured CS/SA/POSS composite gel spheres with a diameter of ~2.5 mm by using hydrophilic Janus-type polyhedral oligomeric silsesquioxane (AS-POSS) as a crosslinking agent in combination with sodium alginate and chitosan via electrostatic adsorption/free radical polymerization. As the content of POSS increases, the wall thickness of the gel spheres also increases from 20 to 30 μm, leading to a more compact and smooth wall structure in the polymerized CS/SA/POSS composite gel spheres. Additionally, the introduction and polymerization of POSS significantly enhance the stability, drug loading rate, and entrapment rate of the gel spheres, providing them with improved drug release capabilities. For hydrophilic drug doxorubicin, the loading rate and encapsulation rate reach 41.2% and 79.9%, respectively, while for the hydrophobic drug ibuprofen, they are 14.7% and 76.3%. Compared to some previously reported drug-loaded gel materials, the gels prepared in this study demonstrate relatively higher drug loading performance. Thus, these hollow-structured CS/SA/POSS composite gel spheres hold promise as innovative drug carriers in the biomedical field.
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高影响因子
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