JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 22
·e55447
·
IF 2.7
Huawei Huang,Yiwen Hu,Xiuduo Song,Jian Kang,Dandan Chen
The development of thin-film nanocomposite (TFN) membranes with high performance is conducive to efficient desalination and wastewater treatment. In this work, dendritic mesoporous silica nanoparticles (DLSiO 2 ) were synthesized by a dual-templating strategy. Afterward, they were introduced into the aqueous phase to fabricate TFN membranes via in situ interfacial polymerization (IP) reaction. Powerful techniques as scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, Nano zetasizer-DLS, x-ray photoelectron microscopy, electrokinetic analyzer, and contact angle were used in the characterization of dendritic structures and nanocomposite membranes. Results revealed that DLSiO 2 with special structural characteristics can effectively regulate the IP process, promoting the enhancement of the crosslinking degree, surface hydrophilicity, and surface negative charge of polyaimde (PA) selective layers. It is also beneficial for constructing extra water channels within the PA selective layer to boost the transport of water molecules. As a consequence, the prepared TFN membrane with 0.3 mg/mL DLSiO 2 exhibits optimal separation performance and good pressure resistance, acid–base resistance, and anti-fouling properties. It also exhibited a water permeability of 4.17 L m −2 h −1 bar −1 (increased by 61.7% compared with thin film composites (TFC) membrane) and a NaCl rejection of 99.0%, which were better than those of TFN membranes prepared by introducing other types of silica in other studies.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 39
·e56007
·
IF 2.7
Zi-Ying Yao,Sher Ayaz,Xin-Miao Yin,Hai-Yin Yu
Using highly sulfonated poly(ether ether ketone) (SPEEK) as the base material, the structure and properties of poly(ether ether ketone) (PEEK) membranes are optimized by precisely controlling the doping of phosphotungstic acid (HPW), dopamine (DA), and various amounts of carbon nanomaterials. Compared with conventional PEEK membranes, this optimized membrane exhibits higher proton conductivity, lower water absorption swelling rate, and excellent thermal stability. Highly SPEEK is soluble in water, thus fails to be used in fuel cell applications. Herein, we conduct Friedel-Crafts method to obtain cross-linked highly sulfonated membrane with controlled water uptake and swelling while still maintaining high proton conductivity. The polymer is then doped with phosphotungstic acid (HPW) to acquire enhanced performance. To control HPW leakage, polydopamine (PDA) acting as double-sided adhesive is incorporated within the membrane. By distributing 1 wt.% PDA, the HPW leakage is reduced almost three times. The composite C-SPEEK/HPW x /PDA y membranes have exhibited excellent overall performance. Specifically, the best proton conductivity result of C-SPEEK/HPW 50 has reached 0.271 S/cm. Moreover, it has presented superb performance in H 2 /O 2 single cell test recorded as power density of 886.13 mW/cm 2 while current density is 1614.20 mA/cm 2 at 60°C.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Zeya Li,Mingyu Zhai,Xin Wu,Zeying Chen,Lifen Liang,Xiuli Wang,Laizhou Song
The nanofiltration (NF) membrane has not been extensively competent for rejection of monovalent ions (such as Cl − and NO 3 − ), and the strategy for enhancing monovalent ion rejection and permeation flux still faces a significant challenge. Herein, based on our previous polyethersulfone (PES)-type NF membrane (NF-0), two novel NF membranes were fabricated with additional incorporations of 2,2′-benzidinedisulfonic acid (BDSA) and forward osmotic extraction solution-functioned nanoparticles (MNPs) to remove nitrate from the aqueous solution. The fabricated NF-BDSA membrane with introduction of BDSA in ultrathin layer displays a significant nitrate rejection of 92.2% and an acceptable permeation flux of 21 L m −1 h −1 at 0.6 MPa. As anticipated, the obtained NF-MNPs1.0 membrane with additional incorporation of MNPs (1.0 wt% addition) in the substrate layer of NF-BDSA membrane achieves further improvements in nitrate rejection (95%) and water permeability (32.3 L m −1 h −1 ); encouragingly, this membrane exhibits comparable monovalent ion rejection and permeation flux to reverse osmosis membrane under relatively low pressure. Compared with those of NF-0 membrane, the permeation flux and nitrate rejection of NF-MNPs1.0 membrane increase by 111.1% and 6.1%, respectively. Moreover, the superior performances of endurance, antifouling and chlorine resistance of NF-MNPs1.0 membrane demonstrate its expectable perspective of potential engineering applications.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Hong Yang,Yan Bao,Chao Liu,Sike Yu,Ruyue Guo,Wenbo Zhang,Ji Li
Polyacrylate was widely used in textiles, leather, and functional coatings due to its excellent film formation and flexibility. However, its durability was compromised by mechanical damage and poor water resistance. This study aimed to design a UV-induced self-healing polyacrylate coating (PXD) using vinyl-modified coumarin and acrylate monomers based on photoreversible covalent and hydrophobic interactions. The effect of the coumarin structure on the mechanical and self-healing properties was systematically examined. Results showed that increasing polymer chain flexibility, extending the distance between coumarin structures and the main chain, and raising the healing temperature enhanced self-healing efficiency. The PXD samples achieved over 84% healing efficiency after 8 h of 365 nm UV irradiation at 60°C, with scratches approximately 15 μm wide nearly fully healed within 2 h. Molecular dynamics simulations confirmed the influence of monomer structure on polymer flexibility, and the PXD self-healing mechanism was clarified. PXD-5 also exhibited improved hydrophobicity and water resistance, particularly under UV light, significantly enhancing leather durability. This development of UV-induced self-healing polyacrylate coatings represents a significant advancement in functional coating materials.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 142
·期 1
·e56315
·
IF 2.7
Faxin Du,Gen Liu,Zhangjun Yao,Shengrong Zhou,Qiuhong Wang,Chengqiang Yang,Qian Lu,Pan He,Jiaxuan Cao,Honglin Chen,Yujun Wei,Rui Han,Shuai Zhang,Guang-Zhao Li
Renowned for its oil, heat, and chemical resistance, fluoroelastomer rubber (FKM) also presents notable drawbacks, such as inferior low-temperature performance. In this study, 2,2-trifluoroethylamine (TF) and 2,4-difluorobenzylamine (DF) were grafted onto epoxidized soybean oil (ESBO) to generate two innovative plasticizers: ESBO-TF and ESBO-DF that they were specifically designed to augment the low-temperature performance of FKM. A thorough investigation into the effects of ESBO-TF/DF on FKM/EPDM blends' properties was conducted. The study demonstrated that the integration of ESBO-TF and ESBO-DF enhanced the vital properties of the FKM/EPDM blends, including elongation at break, tear strength, and, significantly, low-temperature performance. There was a noticeable decrease in the glass transition temperature ( T g ), dropping by 3.54 and 2.95°C with the incorporation of 10 phr ESBO-TF and ESBO-DF, respectively. These respective plasticizers showed positive effects on the plasticization and compatibilization of the FKM/EPDM blends, thus proposing a novel methodology for developing new plasticizers for FKM and related blends.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 29
·e55663
·
IF 2.7
Gongwei Xia,Xiao Xu,Jianfang Chen,Ruitao Jiang,Hao Zheng
A facile strategy to construct superhydrophobic coatings was carried out by one-pot process using novel nano zero-valent iron and hydrogen peroxide as trigger in ethanol and Tris buffer mixed system containing dopamine and 1H,1H,2H,2H-perfluorodecanethiol (PFDT) for the first time. The polydopamine (PDA) modified by PFDT composite coating can be deposited onto various substrates including glass slides, polyurethane sheets, polytetrafluoroethylene wafers, 304 stainless steel sheets, and polyurethane sponges, revealing excellent hydrophobicity with the water contact angles from 157.1° to 162.2° and the sliding angle lower than 1°. The flourier transformed infrared spectroscopy and x-ray photoelectron spectroscopy information of the composite coating demonstrated the successful covalent interaction between catechol group in PDA and thiol group of PFDT via Michael addition reaction. As-prepared PFDT/PDA composite coatings exhibited enhanced chemical stability in highly acidic solutions for 6 days, alkaline aqueous solutions for 5 days, salty solutions (3.5 wt%) for 28 days, and polar organic solvents for 24 h, respectively, as well as resistance to algae adhesion. The excellent corrosion resistance and chemical stability of the composite coating and their simple, time saving and inexpensive construction process are expected to be widely applied in various areas, including marine anti-corrosion, anti-fouling, and oil–water separation.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 32
·e55766
·
IF 2.7
Ruqing Chong,Lingding Meng,Qiyong Liao,Zihui Meng,Wenfang Liu
Converting carbon dioxide into formic acid with formate dehydrogenase (FDH) as a catalyst is a gentle and eco-friendly process that not only conserves energy and reduces emissions but transforms waste into valuable resource. Enzyme immobilization is a common strategy for improving the stability and recyclability of enzyme, however, the procedures are usually complicated that include surface modification and binding reactions in order to form reliable linkages. Co-deposition of polydopamine (PDA) with polyethyleneimine (PEI) is a popular surface modification approach in versatile fields, but their co-deposition with enzymes is rarely reported. Herein, one-pot immobilization of FDH on SiO 2 nanoparticles based on catechol chemistry was attempted for the first time with or without PEI, and the resultant immobilized enzymes, FDH/PDA/PEI-SiO 2 and FDH/PDA-SiO 2 , were characterized, and the effects of the composition and deposition conditions on the catalytic performance were investigated. FDH/PDA-SiO 2 exhibited a higher apparent specific activity than FDH/PDA/PEI-SiO 2 , which was separately 0.167 and 0.136 mM/h/mg. The activity recovery rate was 464% and 378% of that of free enzyme. After 5 cycles, their relative activity was 82.3% and 87.4%. This research is significant in presenting a simple and high-efficient one-pot immobilization method that can be extended to other kinds of enzymes.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 13
·e55150
·
IF 2.7
Yongjun Wang,Yintao Guo,Shuimi Zhong,Qisong Lin,Feng Gao,Wenxing Chen,Wangyang Lu
The preparation process from waste fibers to regenerated fibers is an environmental significance work. In this work, liquid chromatography/time-of-flight mass spectrometry, advanced polymer chromatography/multi-angle laser-light-scattering/refractive index detector, and two-dimensional wide-angle X-ray diffractometry were employed to characterize the polycaprolactam(PA6) fibers above oligomers composition and content, molecular weight and distribution, crystallization and orientation, and analyzing the changes in mechanical properties. The total content of oligomers in physical and chemical regenerated PA6 fiber is 2.084 wt% and 1.812 wt%, individually, which is higher than that in waste PA6 fiber. And the oligomer content of C1–C4 (cyclic monomer, cyclic dimer, cyclic trimer, and cyclic tetramer) in the regenerated PA6 fiber is higher than that of waste PA6 fiber. The regenerated PA6 fiber sample contains more low-molecular-weight substances, making it easier to form crystal nuclei and crystallize. During the dyeing process of the regenerated PA6 fiber, the γ crystal transformed into α crystal. The tensile strength of physical and chemical regenerated PA6 fiber is lower than that of waste PA6 fiber. And after dyeing, the oligomers content of regenerated PA6 fiber is significantly decreased, especially in C1–C4 oligomer. However, the crystalliniy and orientation of regenerated PA6 fibers were improved, which also leads to the fracture strength increased by about 20% compared to undyed fibers.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 26
·e55561
·
IF 2.7
Kaiqi Fan,Jiwei Peng,Wentong Yang,Xiaobo Wang,Sen Liu,Luxin Cao,Haijun Sun,Xiaojing Zhang
Gels with excellent ionic conductivity and resilience to temperature extremes are sought in practical applications due to their potential for building flexible and wearable soft electronics. In this work, highly conductive eutectogels are fabricated by one-step polymerization of (3-acrylamidopropyl) trimethyl ammonium chloride in deep eutectic solvents (DESs). Owing to the ion-conductive polymer networks facilitating ion conduction, these eutectogels exhibit a significant enhancement in ionic conductivity (27.1 mS cm −1 ), demonstrating an order of magnitude higher than that of pure DES. Furthermore, due to several unique properties of DES, these eutectogels exhibit excellent stretchability (>1000%), good adhesion, as well as nonflammability performance over a wide temperature range (−40 to 100°C). Moreover, the strain sensor based on the eutectogel shows a highly sensitive response (gauge factor = 6.92) to a broad strain range (from 450% to 550%), enabling the accurate and reliable detection of various human movements. Additionally, our findings reveal that the eutectogel-based sensor displays a comparable pattern of response curves with negligible signal deterioration, even at extreme temperatures of −20 and 60°C. The results of this work will promote novel applications in the construction of flexible and safe devices.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Hanlin Lv,Wan Zheng,Yuhang Wang,Zhengsheng Hu,Yanjun Chen,Yifeng Wang
Photonic crystal hydrogels are widely used in the field of visual detection, based on the response of the structural color to external stimulus, such as pH, temperature, near-infrared light, and so on. Here, we develop an opal photonic crystal hydrogel by combining polystyrene (PS) photonic crystals with a fluorescent double-network hydrogel and focus on both its visual detection function and mechanical property. The opal hydrogel is composed of nanocomposite hydrogel as the first network and ionic crosslinked hydrogel as the second network. The introduction of PS photonic crystals and terbium ions endows the opal hydrogel distinctive structural colors and fluorescence, respectively. Because of volume changes, the structural color of the opal hydrogel selectively responses to metal ions and organic solvents. Attributing to the ion exchange interaction, the opal hydrogel exhibits fluorescent responses to various metal ions. Combining the responsiveness of structural color and fluorescence, a visual dual-detection mode is set up, with better detection sensitivity and selectivity. Moreover, the characteristics of nanocomposite and double-network crosslinking ensure the opal hydrogel enough mechanical properties to undergo cycle visual detection. Consequently, the fabricated opal hydrogel is promising for use in visual detection to multiple substances in single- or dual-detection mode.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Minghao Li,Yu Bai,Enquan Hao,Hongjie Li,Chunhui Chen,Wenqing Hai,Ziyang Jiang,Qian Meng,Huiqi Shao,Guangwei Shao,Siyi Bi,Jinhua Jiang,Nanliang Chen
The widespread industrial applications of thermoplastic polyurethane (TPU) are partially limited by its flammability. The design of high-performance intumescent flame retardants (IFR) is of great significance for enhancing flame retardant (FR) performance of TPU. In this work, an IFR system consisting of ammonium polyphosphate (APP), double pentaerythritol (DPER), and zinc borate (ZB) is proposed. The optimized experimental parameters with 15 wt.% additive amount of FR, APP-DPER weight ratio of 2.28:1 and 15.56 wt.% ZB content are regulated based on Box–Behnken design-response surface methodology (BBD-RSM) to obtain TPU/FR composite with superior limiting oxygen index value of 30.2%. Noticeably, the design efficiency of TPU/FR composite is significantly improved by utilizing BBD-RSM. Results of vertical burning test show that the optimized TPU/FR composite passes UL 94 V-0 rating and peak heat release rate is dramatically reduced from 1355.88 (neat TPU) to 201.01 KW/m 2 through cone calorimeter test. In addition, scanning electron microscopy accompanied with Raman spectroscopy are conducted to characterize the morphology and composition of residual char for further exploring the FR mechanism of IFR system in TPU. The as-prepared TPU/FR composite has provided new potential application in engineering fields.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 16
·e55253
·
IF 2.7
Xiaocan Zhang,Siqin Zeng,Jiashu Long,Xuesong Li,Yutong Zhao
Using porous materials to selectively adsorb H 2 O from natural gas is a promising method to dehydrate methane (CH 4 ). The structure of a Zirconium metal-organic framework (Zr-MOF), namely, MIP-202, features a high density of amino groups, which can produce strong hydrogen bonding with H 2 O molecules. MIP-202 is cost-effective, green and scalable, and it exhibits good chemical stability under various conditions. This work incorporated MIP-202 nanoparticles into the high permeability polymer polyetherimide (PEI), and the obtained Mixed Matrix Membranes (MMMs) was used for the gas separation of H 2 O/CH 4 . It is found that MMMs loaded with 20 wt% of MIP-202 demonstrated a high H 2 O/CH 4 selectivity of 832.2, which was about 760 times of that of the pure PEI. This approach offers a new route to fabricate functional membranes for energy-efficient gas separations.
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高影响因子
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