JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Miaomiao Zhu,Wenxuan Xu,Duo Wu,Zhuangcheng Liu,Yuanyuan Song,Aying Zhou,Ranhua Xiong,Chaobo Huang
Design and fabrication of pH-responsive nanofibrous membranes by biomaterials is a key step for drug delivery systems. Currently, there is an increasing attention on design of biocompatible nanofibrous drug delivery systems. Here, a bio-based pH-responsive nanofibrous membranes loaded with antibiotic were fabricated for the controlled release of tetracycline hydrochloride (TH). The in vitro drug release behavior of varied pH-responsive nanofibrous with different mass ratios of poly (lactic acid) (PLA) and cellulose acetate phthalate (CAP) was investigated to clarify the release mechanism. TH initial burst release within 20 mins was large than 97.5% for PLA/CAP/TH NFM under alkaline conditions (pH = 8). The antioxidant activity of TH loaded PLA/CAP NFMs are all higher than 55% after 30 mins. The prepared fibrous membranes possess sufficient antibacterial activity against both to Gram-negative and Gram-positive bacteria. At the same time, it also has good biocompatibility. Therefore, the fabricated nanofibrous membranes was demonstrated to be a pH-responsive nanoplatform for drug delivery.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Xiuhong Li,Shuailong Zhang,Jiangzhou Li,Xinyu Hu,Jinjiao Zhang,Qiong Wei,Chupeng Zhang,Daode Zhang,Yong Liu
Various electrospun fibrous membranes have been addressed for oil/water separation owing to their advantages of high specific surface ratio, lightweight, and high porosity. However, they are commonly obtained by solution electrospinning of non-green raw materials, which could cause serious environmental issues. To realize effective oil/water separation, the optimal processing parameters for melt electrospun polylactic acid (PLA) were determined through orthogonal experiments. Subsequently, PLA fibrous films with cellulose nanofiber (CNF) or sodium chloride (NaCl) for oil/water separation were produced via melt electrospinning. The effects of incorporating CNF or NaCl on the physiochemical properties of melt electrospun PLA fibrous membranes were investigated. In contrast to the pure PLA membranes, the obtained PLA/CNF and PLA/NaCl composite membranes exhibit a finer average fiber diameter and an increased porosity. Also, the oil absorption characteristics and oil/water separation abilities of these fibrous membranes were experimentally studied. In contrast to the 84.55% oil/water separation efficiency of melt-electrospun PLA fibrous membranes, PLA/CNF exhibits the highest oil/water separation efficiency at 93.54%, whereas PLA/NaCl achieves a maximum efficiency of 90.29%. These findings show the applicability of the eco-friendly PLA-based melt electrospun fibrous membrane in the treatment of oily wastewater.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Wei Peng,Liting Wang,Mingyu Zhang,Deng-Guang Yu,Xiaoyan Li
Biodegradable conductive films are crucial for the sustainable development of wearable electronics. In this work, a flexible and degradable conductive film was prepared based on a carefully designed interface of polylactic acid (PLA) electrospun fibers and silver nanowires (AgNWs). The amphiphilic triblock copolymer was added to PLA solution for electrospinning, followed by solvent posttreatment to induce the hydrophilic block of the amphiphilic triblock copolymer to migrate to the fiber surface. Dopamine can be uniformly polymerized on the surface of hydrophilic PLA fibers, and the prepared PLA@PDA fiber film can form a good interface combination with AgNWs. The electrical conductivity of AgNWs/PLA@PDA flexible film can reach 258.5 S cm −1 , showing obvious Joule heating effect and good mechanical properties. Degradation experiments showed that in phosphate buffered saline , the PLA molecular chain showed a dynamic equilibrium due to the scission and rearrangement of the ester groups and degraded slowly, while AgNWs/PLA@PDA degraded rapidly under alkaline conditions. Our study provides a simple and controllable method to prepare flexible degradable electronic films, which is expected to be applied to flexible wearable bioelectrodes.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Donglin Li,Wenxin Deng,Zhefeng Jin,Jiangpeng Hu,Yujia Zhao,Nuo Cao,Chao Wan,Xuhuang Chen,Peng Yu
The structure-gradient silicone rubber foam (SRF) is an advanced bionic material with potential for applications in energy-damping, triboelectric nanogenerators, and electromagnetic interference shielding. However, the production of SRFs with an adjustable gradient structure is still a significant challenge. Herein, a novel strategy combining in situ precuring of silicone rubber induced by gradient temperature fields with supercritical CO 2 foaming was developed to prepare SRFs with biomimetic gradient cellular structures. By regulating the unilateral heat source temperature and precuring time, SR samples with gradient curing degrees from 16.13% to 51.21% were achieved. Finally, a prospective structure-gradient SRF with a cell size range of 24.10–182.80 μm was successfully prepared. The energy loss coefficient of gradient SRF can be reduced by 41.65% compared with that of uniform cellular structure foam with average cell size of 31.25 μm after 50 cycles. Gradient SRFs show significantly enhanced mechanical performance, recoverability, and elasticity. Besides, the underlying mechanism for generating this gradient cellular structure was clarified.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Sijia Yang,Xiao Song,Ran Wei,Chuanjiang Zhou,Zhaoqiang Wu,Hong Chen
The formation of fog on the surface of transparent glass severely reduces its transmittance, which limits its application in medical devices, optical instruments, and other industries that require high transmittance. A new transparent, water-resistant, and abrasion-resistant PVA anti-fog coating based on polyvinyl alcohol (PVA), 5-sulfosalicylic acid (SAD), and ammonium persulfate (APS) was developed in this study. The hydroxyl, carboxyl, and sulfonic acid groups in the SAD molecule can form dense hydrogen bonds with the hydroxyl groups on the PVA side chain, which increases the water resistance of the coating. APS, as a free radical initiator, can produce sulfate radicals during the thermal curing of the coating and eventually form a cross-linked structure of the PVA main carbon chain, thereby further improving the water resistance, friction resistance, and thermal stability of the coating. The experimental results show that the transparent glass surface modified by the coating not only has excellent light transmittance and anti-fog performance but also has good abrasion resistance and thermal stability. In addition, the preparation method of the transparent hydrophilic anti-fog coating is simple and convenient, and nontoxic and environmentally friendly water is used as the solvent, which is expected to be used in large-scale industrial production.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 27
·e55616
·
IF 2.7
Jiangtao Liu,Ke Yang,Yaru Yang,Mingshuo Zhang,Yiran Shi,Baoxia Xue,Mei Niu,Li Zhang
To enhance the efficient utilization of waste hemp rods, a kind of three-dimensional (3D), mesh-like lamellar structured hemp-based biomass carbon aerogel (CA) was developed by freeze-drying and subsequent high-temperature carbonization method. The microstructure, flame resistance, thermal stability, and thermal conductivity of CA were investigated using several analytical techniques, including scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), simulated combustion tests, and thermogravimetric analysis (TG). Optimum formulation yielded at an alkali treatment concentration of 20% and a carbonization temperature of 700°C, CA with a 3D network of reticulated lamellae was obtained. CA exhibited minimal values for thermal conductivity (0.06 W/m K) and thermal diffusion coefficient (0.41 mm 2 /s), which are indicative of superior insulative properties. Moreover, the material demonstrated remarkable thermal endurance and flame resistance, achieving a char yield of 70.03% when subjected to a temperature of 700°C in an oxidative environment.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 27
·e55615
·
IF 2.7
Haimin Zheng,Fang Li,Dandan Chen,Gaowei Nie,Bo Yu,Xiaoxiao Chen,Hao Guo,Zhouai Luo,Zhikang Cheng,Jianxin He
Developing environmentally friendly and high-performing viable waterproof and breathable membranes (WBMs) is critical but significantly challenging. Herein, we combine electrospinning and electro-spraying methods. First, elastic thermoplastic polyurethane (TPU) is used as the polymer, and poly(methylhydrosiloxane) (PMHS) with low surface energy is introduced to prepare TPU/PMHS fiber-based membranes by electrospinning. Electro-spraying is performed using a dilute solution of TPU/PMHS/SiO 2 , with fluorine-free hydrophobic SiO 2 nanoparticles introduced to facilitate the construction of a rough lotus-leaf-like surface structure, ultimately obtaining TPU/PMHS/SiO 2 WBMs with bead-on-string fiber binary structures and a strong water repellency. The results indicate that the TPU/PMHS/SiO 2 WBMs comprise a three-dimensional porous structure formed by randomly arranged fibers and a lotus biomimetic structure consisting of bead-like fibers, providing the membrane with excellent mechanical properties and waterproof breathability, including a tensile strength of 15.8 MPa, static water pressure of 33 kPa, water vapor transmission rate of 5169 g m −2 d −1 , and contact angle of 142°. Additionally, the fiber membrane exhibits an excellent strain recovery after 1000 cycles of cyclic stretching under 100% strain, verifying the excellent elastic properties of the TPU/PMHS/SiO 2 WBMs. This simple preparation process and unique composite structure can facilitate the design and preparation of environmentally friendly, waterproof, and breathable materials.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 22
·e55444
·
IF 2.7
Donglin Li,Zi Wei,Lifen Li,Chang Peng,Lunneng Xu,Siwen Bi,Xuhuang Chen,Peng Yu
In this work, a facile in situ precuring and supercritical CO 2 (sc-CO 2 ) foaming technology is proposed to fabricate silicone rubber foam (SRF) with a tunable cell structure. Uncured silicone rubber is put into the autoclave to saturate sc-CO 2 directly, which not only shorts the saturation time but also accelerates the curing reaction in the precuring process. In the foaming process, cell nucleation is triggered by rapid release of pressure. The cell structure of SRF samples with cell size range of 9.45 to 128.09 μm, cell density range of 3.5 × 10 5 cells/cm 3 to 5.7 × 10 8 cells/cm 3 , and porosity range of 28.35% to 77.28% are successfully fabricated by controlling of precuring time, saturation pressure and foaming temperature. To guarantee the dimensional stability and optimize surface quality of SRF samples, in situ post-curing process is implemented within the foaming mold. With the increase of cell size from 9.91 to 128.09 μm, the compressive stress at strain of 75% decreases from 2.19 to 0.61 MPa, while the energy loss coefficient reduces from 35.4% to 16.9%, exhibiting excellent compression recovery steady. The new technique integrates the precuring, foaming process and post-curing into an autoclave to simplify the SRF procedure.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Chao Ling,Wen Zhang,Zhengzhou Wang
The preparation of biomass flame retardants with efficient flame-retardant properties is conducive to the realization of sustainable development and is of great practical significance. In this work, a green and sustainable biomass flame retardant PATAPEI was prepared by using phytic acid (PA), tannic acid (TA), and polyethyleneimine (PEI) as reactants via a one-step method to develop biomass flame retardants that can synchronize enhanced flame retardation, smoke suppression, and mechanical performance of epoxy resin (EP). The EP with only a 3% PATAPEI (EP/3PTP) has a LOI value of 28.5% with a UL-94 V-0 classification. The peak heat release rate (PHRR), total heat release (THR), and total smoke release (TSR) of EP/3PTP were decreased by 29.72%, 25.80%, and 21.16%, respectively, in comparison with the ones of pure EP. Additionally, the tensile and impact strengths of EP/3PTP are higher than the ones of pure EP. PATAPEI on heating decomposes to produce phosphorus-containing acids and biphenyltriol-containing compounds, which promote to form a good char layer with the aromatic structures during the combustion of EP/3PTP. Therefore, PATAPEI has prospects of wide application in the development of sustainable biomass flame retardant EP.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Ling Weng,Jinming Liu,Xiaorui Zhang,Hang Xu,Lizhu Guan,Yang Yu
Considering the ongoing evolution of flexible printed circuit boards and the importance of safeguarding the intellectual property of circuit designs, there exists an imperative demand for the development of a black film exhibiting exceptional electrical properties and remarkable light-shielding capabilities. Consequently, this work employs a straightforward strategy to enhance the opacity of polyimide films by incorporating carbon black (CB) and manganese dioxide (MnO 2 ) as black fillers using an in situ doping method. Rigorous tests are conducted, analyzing properties such as dielectric constant, dielectric loss, breakdown field strength, current density, and ferroelectric energy storage. The optimal ratio of CB to MnO 2 (mass fraction) is determined as 1:5, with a total powder doping amount of 6 wt%, providing the best ratio relative to the matrix resin. This ratio ensures an optimal powder dispersion state, resulting in an outstanding breakdown field of 147.4 kV/mm and ultralow dielectric constants, measuring less than 3.78 at 103 Hz. This composite film is anticipated to find applications as a cutting-edge material for electronic devices and the semiconductor industry.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Yanhong Feng,Guangliang Liu,Yong Liang,Bo Lei
The exploitation and utilization of natural fibers still face many challenges due to their high crystallinity and extensive hydrogen bond network. Therefore, sustainable and effective modification strategies are currently essential. In this work, we investigate the processing and mechanical performances of natural fibers modified by combining sodium periodate oxidation and subsequent Schiff base reaction. Steam-exploded hemp fibers (HFs) were firstly oxidized with sodium periodate, and subsequently grafted with 1,10-diaminodecane. A decrease in the glass transition temperature of oxidized-aminated HFs (OAHFs) from 225 to 150°C was achieved as the dosage of periodate increased. Admirable mechanical properties were achieved despite a lower dosage of periodate due to melt bonding and chemical cross-linking between the fibers during heat processing. Particularly, dynamic compression molding was applied to heat processes and effectively improved the melt bonding and the chemical crosslinking, which increased flexural strength from 58.2 to 69.9 MPa. This strategy was moderate and low cost. The resulted material has good processing performance and excellent mechanical properties, which have large industrial application prospects and potential in the field of biodegradable environment-friendly materials.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Yumeng Zhang,Na Li,Yulong Xiao,Qiwen Yong,Yuechuan Wang,Yao Xiao,Jingxin Lei
The balance of chain flexibility and rigidity may improve the fluorescence quantum yields (QYs) of unconventional aggregation-induced emission (AIE) polymers. Herein, we prepared four crosslinked polyacrylic acids (CPAAs) with AIE effect using N,N′ -methylene bisacrylamide (MBA) as the crosslinker. The chain flexibility of the CPAAs decreases with the increase of MBA contents. These CPAAs show bright blue fluorescence under the irradiation of UV light. The maximum excitation wavelengths of the CPAAs are not near their UV absorption peaks because their emission is originated from the clustering of the oxygen atoms of the carbonyl groups, but not the ( n , π *) transition of the oxygen atoms. The emission spectra and fluorescent lifetime data both validate that all the CPAAs have similar emission species. Density functional theory calculations suggest the emission of the CPAAs comes from the carboxyl groups. One of the CPAAs with balanced chain flexibility and rigidity has an optimized fluorescence QY of 17.7%, which is much higher than that of the reported linear PAA of 4.5%.
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高影响因子
危险品化学品经营许可证（带存储）