JOURNAL OF APPLIED POLYMER SCIENCE
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2024
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IF 2.7
Lin Mei,Zhimin Liu,Yanmei Shi,Xiangyun Zhang
Near-infrared laser-activated gold nanorods (AuNRs) with excellent photothermal property and tunable surface functionalization are considered as an ideal platform for biomedical applications. However, bare AuNRs have cytotoxicity against normal cells and are prone to agglomeration during laser irradiation. Herein, multivalent polymer-functionalized AuNRs (AuNRs@pDMAEMA-C 4 ) was constructed as a highly stable and biocompatible photothermal agent for enhanced antibacterial therapy. The functionalized polymer was synthetized via the reversible addition-fragmentation chain transfer polymerization and subsequently quaternized. Moreover, positively charged AuNRs@pDMAEMA-C 4 can easily capture the bacterial surface via electrostatic interactions. The integration of photothermal therapy of AuNRs and chemotherapy of functionalized polymer can achieve enhanced antibacterial effects. Under 808 nm laser irradiation, AuNRs@pDMAEMA-C 4 possessed excellent photothermal conversion capability and can kill gram-positive and gram-negative bacteria. Study of the antibacterial mechanism indicated that the antibacterial action of the prepared photothermal antibacterial agent can cause serious damage of the bacterial outer membranes, result in cytoplasm leakage and bacterial death. The nanocomposites combining with near-infrared laser irradiation can facilitate rapid healing of bacteria-infected wound by rat model of wound infection and histological analysis of the wound tissues. These results suggest that the surface functionalization can be used as potential strategy to fabricate light-activated therapeutic agent for biomedical applications.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 142
·期 4
·e56404
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IF 2.7
Song Li,Lingbo Dong,Jinyi Jia,Licong Jiang,Zhenxiang Xin,Wei Liu,Lin Li
A large amount of smoke will be produced during the combustion of ethylene propylene diene monomer(EPDM), which seriously endangers the environment and personal safety. In this study, K-SEP was obtained by modifying sepiolite with KH550, and two bio-based flame retardant and smoke suppression systems AEGS and PEGS were prepared by combining ammonium polyphosphate intumescent flame retardant system (AEG) and piperazine pyrophosphate intumescent flame retardant system (PEG), respectively. The flame retardant and smoke suppression properties of AEGS and PEGS on EPDM matrix composites were investigated. The experimental results show that the LOI values of EPDM/AEGS3 and EPDM/PEGS3 composites with 3 phr K-SEP are 8.1% and 5.5% higher than those of the blank samples without sepiolite. TSP decreased by 26.3% and 14.3% respectively, which proved that sepiolite has important research value in the field of flame retardant and smoke suppression of polymer materials.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 24
·e55504
·
IF 2.7
Denghui Ren,Shilin Deng,Yanying L.V.,Cao Li,Qingzhao Yang,Fang Lai,Jing Li
In this study, an eco-friendly approach is presented for the innovative use of waste oyster shell (OS) powder modified with zinc stannate, aliphatic alcohols, and silane coupling agents blended with styrene-butadiene-styrene (SBS) modified asphalt to make a flame-retardant binder (modified oyster shell [MOS]/styrene-butadiene-styrene [SBS]/MA), which is rendered flame retardant and smoke suppressive. Compared with the original SBS/MA, MOS/SBS/MA with a 2% addition rate showed a 35.44% increase in ultimate oxygen index, a 30.62% reduction in peak exotherm, a 10.87% reduction in smoke density, and a 75% reduction in volatile organic compound (VOC) emissions. It also has excellent mechanical properties, with increases in composite modulus, elastic modulus, and storage modulus of 68.58%, 97.29%, and 59.59%, respectively, at 46°C. The thermal stability of MOS/SBS/MA is also improved, with a decomposition temperature 26°C higher than that of SBS/MA. Pavement performance tests show that the water-soaked Marshall's split strength has increased by 3.87% and the coefficient of rutting by 3.51%. Increased by 3.51%, this method effectively utilizes the waste OS, improves the fire-retardant properties of asphalt while retaining the mechanical properties of the modified asphalt binder, and provides a model for developing sustainable fire-retardant asphalt in coastal areas.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 48
·e56281
·
IF 2.7
Yanna Zhao,Yingying Zhang,Xiaowei Bai,Yuqi Wang,Yiqing Li,Shuai Yang
Polyimide materials with high mechanical strength are widely used in various fields, but pose certain challenges in achieving sustainable material utilization. A poly(imide-imide) vitrimer material (ADTA) based on multiple dynamic covalent bonds (imide, imine, and disulfide bonds) was constructed by preparing vanillin difunctionalized derivatives (DVA) for aldolamine condensation reactions with bis-amine monomers (ATFA) and tris(2-aminoethyl) amines (TAEA) with imide structures. The ADTA material has good 5% thermal stability T d 5% (278.87°C), high energy storage modulus E (2421.26 MPa), and fast relaxation time (36.39 s). The thermal stability and mechanical properties of the material are enhanced by the more stable alicyclic structure of the imide structure. The material also demonstrated excellent solvent resistance and self-healing properties. This study provides a new option for the development of sustainable utilization of polyimide materials.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2025
·
IF 2.8
Yancheng Yan,Zeyu Xue,Lianci Wu,Yumei Luo,Xiaodong Bai
In the process of oil and gas production, the failure of drilling fluid caused it to invade the formation, leading to wellbore instability. N-isopropylacrylamide (NIPAM), acrylamide (AM), and sodium p-styrene sulfonate (SSS) were used as raw materials, and the P(NIPAM/AM/SSS) (abbreviated as NAS) temperature-sensitive plugging agent was synthesized by inverse emulsion polymerization. The optimum synthesis conditions were obtained using a redox initiation system. Infrared measurements and UV–visible analysis showed that the target product was successfully prepared, and NAS exhibited a lower critical solution temperature (LCST) of 55°C, with sensitive temperature-responsive behavior. Rheological and filtration tests, along with high-temperature and high-pressure (HTHP) sand tray tests, demonstrated that the temperature-sensitive plugging agent effectively plugged the formation. Particle size analysis and Zeta potential analysis indicated that the addition of the temperature-sensitive plugging agent increased the electrostatic stability of bentonite-based slurry and polymer. Contact angle measurements and micro-morphology of the mud cake revealed that a hydrophilic-hydrophobic transition occurred at high temperatures in NAS, forming a dense hydrophobic film on the surface of the mud cake. This film effectively sealed cracks and micropores, reduced the invasion of free water, and improved wellbore stability.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Xiaomei Liu,Jing Li,Pengbo Liu,Cailing Yang,Ziqiang Lei
Adsorbent-based atmospheric water collection technology has great potential in the field of alleviating the shortage of freshwater resources. Here, we prepared the MOF-based hygroscopic polymer material (MPAA) with atmospheric water harvesting and liquid water storage by using MOF-801 with a double copolymerization bond and a three-dimensional structure as a functional monomer and copolymerized with acrylic acid (AA). The atmospheric water-holding properties of the materials at different humidity gradients (50%–90% RH) and their desorption properties under simulated daylight conditions were evaluated. The adsorption of water vapor by MPAA was 628.8 mg/g at the test time of 8 h, which was significantly higher than that of PAA. The field experiment indicated the material's potential to reduce evaporation of soil water, which could potentially be used to store liquid water. This strategy provides new insights into the design of functional materials for atmospheric water harvesting in arid areas and ecological restoration.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 47
·e56268
·
IF 2.7
Zhenjie Yuan,Siqi Huang,Wenduo Chen,Dazhi Jiang
By combination of UV curing and frontal polymerization, interpenetrating polymer networks (IPNs) based on diglycidyl ether of bisphenol-A (DGEBA) epoxy resin and polydicyclopentadiene (PDCPD) were prepared by UV-induced simultaneously frontal polymerization in this paper. Compared with the net DGEBA cured polymer, the tensile strength, elongation at break and impact strength of the IPNs were simultaneously improved. The maximum tensile strength and elongation at break of the IPNs reached 100 MPa and 4.64%, respectively, and the maximum impact strength reached 7.34KJ/m 2 with an improvement of 115.2% over that of the net DGEBA cured polymer. Thermogravimetric analysis (TGA) results revealed that the IPNs could enhance the thermal stability. Data of the differential scanning calorimetry (DSC) and TGA testing shows that the IPN shows a single glass transition temperature ( T g ) which is between the T g of DGEBA and DCPD, indicating homogeneous phase and highly cross-linked IPN formed. Morphologies and molecular structure of the IPNs polymer were observed by scanning electron microscope (SEM) and characterized by Fourier transform infrared spectroscopy (FTIR), respectively, whose results also proved the formation of ideal IPNs structures.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Zhangcheng Gao,Lianfang Feng,Xueping Gu,Jintang Duan,Mingzhe Jiang,Cailiang Zhang
The combination of aromatic and aliphatic structures can endow polyurea with distinct performance advantages. A one-step feeding method is used to synthesize linear hybrid aliphatic/aromatic copolyureas by varying the ratio of m -phenylenediamine (MPD) and polyoxypropylenediamine (D2000) reacting with 4,4′-diphenylmethane diisocyanate (MDI). Real-time Fourier-transform infrared spectrometer monitoring reveals that D2000 exhibits higher reactivity than MPD. Consequently, in the MDI/MPD/D2000 system, D2000 initially reacts with MDI to form an isocyanate-terminated prepolymer, which subsequently reacts with MPD. Compared with the two-step feeding method, this approach successfully eliminates biuret formation and enhances tensile strength. Additionally, decreasing the molar ratio of D2000 to MPD ( λ m ) reduces the size and degree of microphase separation in the polyurea by increasing the ordered hydrogen bonding and benzene conjugation, leading to an increase in tensile strength. Specifically, as λ m decreases from 70 mol% to 30 mol%, the degree of microphase separation decreases from 0.47 to 0.2, causing the tensile strength to rise from 28 to 48 MPa. Further reducing λ m to 30 mol% decreases the degree of microphase separation to 0.16, resulting in an increase in tensile strength to 78 MPa.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 142
·期 5
·e56455
·
IF 2.7
Miao Cao,Qiaoyi Xiao,Bo Wu,Zhisheng Luo,Zhengwei Dai,Jie Yi
Marine biofouling is a major international challenge since it is responsible for several environmental problems and economic losses. Developing a novel antifouling coating with good water resistance, adhesion, and controlled degradation performance is crucial to solving the problem. Herein, a series of waterborne polyurethane emulsions were synthesized using the prepolymerization chain expansion and self-emulsification method, with varying contents of glycerol laurate (GL) as the post-chain extender. The findings demonstrated a notable enhancement in the controllable degradation performance, adhesion, marine antifouling properties, and water resistance with an increase in the concentration of GL. In particular, the film exhibited the most optimal overall properties when the introduction amount of GL was 2 wt%. The absorption rate of the artificial seawater (ASW) reached a state of equilibrium when GWPU2 was immersed in ASW for 60 days, with a final value of approximately 18.5%. The release rates of the GWPU2 antifouling coatings were observed to be the lowest at approximately 120 days, with a rate of approximately 37.59 μg/cm 2 /day. The long-term antifouling capability of the GWPU resins was demonstrated in marine field tests, wherein they exhibited sustained antifouling activity for a period exceeding 9 months. In particular, GWPU2 exhibited noteworthy antifouling performance.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 33
·e55847
·
IF 2.7
Chao Zhang,Erlei Yu,Heyun Wang,Dong Huang,Guojun Ding,Zhonghua Zhao,Zhong Wei
In response to the health and environmental concerns associated with the plasticizer dioctyl phthalate (DOP), this research explores the utilization of methyl oleate (MO) derived from plant oil, 1,2,4-Benzeneticarboxylic anhydride (TMA) and isobutyric anhydride (IA) as a precursor for synthesizing a hyperbranched polyester named IA-MO-TMA. This polyester serves as an alternative plasticizer for Polyvinyl chloride (PVC). The chemical structure of IA-MO-TMA was thoroughly characterized using Fourier Transform Infrared Spectrometer (FTIR) and nuclear magnetic resonance hydrogen spectra, and its molecular weight was assessed. The PVC film, plasticized with IA-MO-TMA, underwent comprehensive testing using techniques such as differential scanning calorimetry, scanning electron microscopy, and thermogravimetric analysis. Notably, the glass transition temperature ( T g ) of the plasticized PVC film exhibited a significant reduction from 75°C to −6.7°C. The plasticized film demonstrated an elongation at break of 318.1%, a tensile strength of 19.2 MPa, and a plasticizing efficiency of 109.9%. Moreover, the use of IA-MO-TMA as a plasticizer increased the initial decomposition temperature of PVC film from 235.6 to 264.1°C. Additionally, the extraction rate of IA-MO-TMA in petroleum ether was found to be 35.6% lower than that of DOP.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Mengmeng Xu,Chengzhong Zong
It is challengeable to obtain shape memory effect in the traditional thermoplastic vulcanizate (TPV) with sea-island microstructure. Herein, we successfully achieved shape memory behavior in the type of ethylene propylene diene monomer/polypropylene thermoplastic vulcanizate (EPDM/PP TPV) compatibilized by the graft products of magnesium maleic (MgMA) and maleic anhydride (MAH) on the interface of EPDM/PP. MgMA and MAH derived from the in situ neutralization reaction of maleic acid (MA) with magnesium oxide (MgO) and the dehydration reaction of MA respectively. In this paper, the mole ratio of MA and MgO on the performance of EPDM/PP TPV was studied. With the incorporation of MA and MgO, the mechanical property and shape memory performance were improved. The result of DMA, FTIR, and SEM verified the successful graft reaction of MgMA and MAH on the polymer chains. The compatibilized EPDM/PP TPV achieved the improved mechanical property of tensile strength (12.9 MPa) and elongation at break (583.5%), the increased R f of 96.2% and R r of 86.7% at the tailoring mole ratio of MA:MgO (1:1.5).
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Feijing Xu,Nian Yin,Shanjun Gao,Chunhui Shen
Ammonium polyphosphate (APP) and intumescent flame-retardant di-(3-amin-opropyltriethoxysilane) spirocyclic pentaerythritol diphosphate (PDAP) were prepared as an intumescent flame retardant with synergistic effect, and polylactic acid (PLA) was modified by melt blending. The flame retardancy of PLA/PDAP/APP was evaluated by limiting oxygen index (LOI), vertical combustion test (UL-94), and cone calorimetry test (CCT), and the thermal stability of PLA/PDAP/APP was studied by thermogravimetric analysis and thermogravimetry-Fourier transform infrared spectroscopy (FTIR). The possible flame-retardant mechanisms of PLA/PDAP/APP were analyzed based on the results of laser Raman spectroscopy and FTIR. When PDAP:APP = 2:1 and the addition amount of PDAP/APP is 20 wt%, the LOI value of PLA/IFR-modified material is as high as 43%, and the UL-94 test reaches V-0 level, and in the CCT, the PHRR and THR of PLA/PDAP/APP (2:1)-modified material are reduced by 80.7% and 76.8%, respectively, compared with pure PLA, and the carbon residue is as high as 62.01%. The results show that the compound APP/PDAP has an excellent flame-retardant effect on PLA, which provides a good research case for PLA flame-retardant-modified plastic materials.
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高影响因子
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