JOURNAL OF APPLIED POLYMER SCIENCE
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2024
·
IF 2.7
Meng Shi,Ge Zhu,Ning Lin,Jingzhi Ma
Polylactic acid (PLA) plays a crucial role in addressing global environmental concerns, particularly the challenges of achieving carbon peak and neutrality goals. Polyetheretherketone (PEEK) has emerged as a potential orthopedic implant material due to its excellent mechanical properties, elastic modulus similar to human bone, wear resistance, and good biocompatibility. In this study, PEEK/PLA (PEEK/PLA) composites were prepared using a film-casting method. PEEK exhibits a spherical structure and can be dispersed in the PLA matrix, demonstrating good compatibility with PLA. Additionally, PEEK acts as a heterogeneous nucleating agent, reducing the surface free energy barrier for the crystallization nucleation of PLA molecules and promoting PLA crystallization. When the PEEK content is 8%, the tensile strength and Young's modulus of the composite material increase by 15.45% and 91.23%, respectively, compared to pure PLA. Furthermore, the introduction of the copolymer (PC x L y A) not only improves the compatibility between PLA and the blend but also successfully regulates the mechanical properties and in vitro degradation of the composite by adjusting the ratio of ε-caprolactone and L-lactide in the copolymer. This study not only delves into the modification strategies and methods for PLA composites but also provides new insights for developing biomedical materials with excellent properties.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Guofeng Zhong,Na Li,Junrong Yu,Yan Wang,Zuming Hu
Poly (metaphenylene isophthalamide) (PMIA) fiber has excellent heat resistance and flame-retardant ability, but its mechanical properties are poor due to its own structure. Therefore, it is of great significance to improve the mechanical properties of fibers to expand their application range. Meanwhile, a large amount of waste aramid fibers generated during the production process are mishandled, resulting in the waste of valuable resources as well as serious environmental pollution. In this study, heterocyclic para-aramid fibers were treated by deprotonation to obtain heterocyclic para-aramid nanofibers, which were combined with PMIA fibers as a reinforcing phase. The composite fibers presented superior mechanical properties through wet spinning and stretching phases. The results showed that when the addition of HANF was 0.4%, the tensile strength and elongation at break of HANF/PMIA composite fibers were increased by 86.28% and 48.48% respectively, compared with PMIA fiber. Compared to most of the current studies on nano-filler reinforced fiber, this work has the advantages of low addition of nano-filler and significant strengthening effect. It provides a feasible and cost-effective approach for the recycling of heterocyclic aramid fiber.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Shihao Fu,Chang Sun,Lixin Han,Zhiqiang Li,Shuai Guo,Guangbin Li,Zhu Long
High-performance thermal insulation is critically needed in applications where heat transfer must be substantially minimized. Traditional insulating materials, whether organic or inorganic, often suffer from thermal instability or mechanical fragility. Herein, we introduce a series of lightweight, highly porous polyimide/aluminum oxide cluster (PI/AlOC) composite aerogels that exhibit superior thermal insulation properties, achieved through freeze-drying and thermal imidization processes. The aluminum oxide clusters serve as cross-linking agents, enhancing the interaction between polyimide molecular chains and endowing the composite with improved structural integrity and mechanical robustness, as evidenced by a compression modulus of 8.7 MPa, six-fold greater than that of pure PI aerogels. Moreover, the high porosity, reduced pore size, and three-dimensional network structure of the PI/AlOC composite aerogel confer exceptional thermal insulation performance, particularly at elevated temperatures, surpassing that of commercial thermal insulation materials. Thus, the PI/AlOC composite aerogels, with their high mechanical strength and outstanding thermal insulation, are promising for practical applications in thermal insulation.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 30
·e55687
·
IF 2.7
Yiwei Zhai,Qianru Kang,Fangbo Zhao,Hongxu Chen,Junqing Li,Hee-Deung Park
In this paper, the effect of the composition of a nonsolvent bath on the physicochemical properties of the polyvinylidene fluoride (PVDF) ultrafiltration membranes were comprehensively investigated using the nonsolvent-induced phase separation method. Three additives (ethanol, glycerol, or NaCl) were added to the water coagulation bath respectively to obtain different membranes. It was found that the microstructure of the membranes changed from finger-like structure to the sponge-like structure with the increase of additives concentration, which successfully improved the retention and mechanical properties of the membranes. In addition, the membrane surface became smoother and more hydrophilic. The membrane fabricated in 30 wt% glycerol bath exhibited outstanding comprehensive properties of retention and anti-fouling, with a water flux of 243.5 L/(m 2 h), a bovine serum albumin rejection of more than 90%, and a flux recovery rate of 97%. From mechanism analysis, the addition of ethanol, glycerol, or NaCl to the coagulation bath altered the thermodynamic stability of the polymer system, and slowed down the rate of solvent and nonsolvent diffusion from a kinetic perspective. This research provides important clues for optimizing the membrane properties, such as flux, rejection, and strength.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 142
·期 2
·e56354
·
IF 2.7
Xueping Zhang,Youquan Liu,Pengfei Zhang,Keyu Pan,Qi Chen,Rui Jiang
The characteristics of tight matrix, underdeveloped natural fractures, small pore throat radius, poor pore connectivity, and abundant clay minerals result in a high potential for damage to the tight sandstone reservoirs of the Shaximiao Formation in the Qiulin Block in the Sichuan Basin. In order to reduce the retention damage caused by fracturing fluid to the tight sandstone reservoir, a low damage fracturing fluid system applicable to the target reservoir is developed in this work, and the indoor performance meets the requirements of on-site fracturing operation. A low-damage, heat-resistant, shear-stable amphiphilic polyacrylamide (PAAD) was prepared by free radical polymerization in aqueous solution using acrylamide, acrylic acid, and methacryloyloyloxyethyl dimethyloctadecyl ammonium bromide (DM18) as the monomers. The amphoteric polyacrylamide was characterized by Fourier infrared spectroscopy, nuclear magnetic resonance spectroscopy ( 1 H NMR), light scattering molecular weight determination, and thermogravimetric analysis. Fracturing fluids were formulated with the amphiphilic hydrophobic associative polymer PAAD as a drag-reducing agent, the fluorine-containing and nonionic complex surfactant FD1 as a clean-up additive, CT10-4B as a bactericide and CT1-12 as an emulsion breaker. The fracturing fluid formulation was preferred, and the performance of the fracturing fluid was evaluated in terms of temperature resistance and shear resistance, drag reduction, anti-expansion, and core damage. The fracturing fluid showed good temperature and shear resistance, with a viscosity retention of 58.4% at 120°C and 170 s −1 shear for 1 h. At a loading of 0.1%, the drag reduction rate reaches 72.3%, the anti-expansion rate of the gel-breaking fluid is 86.04%, and the damage rate to the tight sandstone core is 16.25%. The results show that the fracturing fluid has good heat resistance and shear stability, as well as low damage and good resistance reduction and anti-expansion properties. This work can provide new strategies for designing polymeric fracturing fluids with low damage, good heat resistance and shear stability.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Qihai Wang,Zhifeng Luo,Xiaoli Ren,Haoran Fu,Quan Zhou,Keyou Chen,Shenwen Fang
Adhesive hydrogels frequently demonstrate poor mechanical properties; therefore, it is still challenging to integrate excellent adhesiveness and self-healing properties in one hydrogel. In this work, adenine and thymine were modified by grafting double bonds and then introduced into the structure of the polyacrylamide gel together with N, N′-methylene bisacrylamide (MBA) using a hybrid crosslinking strategy, and then a series of hybrid cross-linked hydrogels with adhesiveness and self-healing properties were successfully prepared. The hybrid crosslinking hydrogel exhibited a tunable adhesive performance and strength, by varying the content of base pairs, monomer concentration, cross-linker concentration, and initiator concentration. The recommended synthesis conditions for the P(AM-mAT) hydrogel were as follows: mA-mT concentration of the total monomer weight 5 wt%, total monomer concentration of 25 wt%, crosslinker (MBA) concentration of 0.5 wt%, and initiator APS concentration of 1.25 wt%. Under optimal conditions, the gel synthesized showed a hardness of 282 g and an adhesive force of 154.5 g. This hydrogel material exhibited excellent adhesion properties to materials such as plastics, glass, metals, and wood, with the best adhesion observed on glass.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Meirong Wang,Ling Lin,Pingya Luo,Di Pu,Xinmin Zhang,Zheng Li,Hongdan Ao
In this investigation, a new micro-crosslinked anionic polymer resistant to elevated temperature and high salinity, PKDASN, was synthesized using 3-chloropropyltriethoxysilane (KMB703), N, N-Dimethylacrylamide (DMAM), 2-acrylamido-2-methylpropanesulfonic acid (AMPS), N-vinyl caprolactam (NVCL), and sodium (4-vinyl phenyl)methanesulfonate (SVM) employing free radical polymerization in a water-based solution. The structure of PKDASN was analyzed using Fourier-transform infrared spectroscopy, nuclear magnetic resonance spectroscopy, and X-ray photoelectron spectroscopy, while its microstructure was analyzed using scanning electron microscopy. Thermogravimetric analysis showed that the pyrolysis temperature of PKDASN was above 294°C. Adding KMB703 enables the polymer to form a dense and stable spatial network. This intensified polymer network could interact with bentonite via intermolecular force and Coulomb force and form a dual grid structure, which presents impressive stability and control of filtration in saltwater. This is mainly achieved through creating a “silane coupling layer” on the particle surface by KMB703, which facilitates the crosslinking and aggregation of the polymer, thereby reinforcing the polymer's framework. This implies that under high-temperature conditions of 230°C, 3 wt% PKDASN can improve the filtration effectiveness of drilling fluids and exhibit resistance to 15 wt% NaCl contamination. American Petroleum Institute filtration(FL API ) and High temperature and high pressure filtration(FL HTHP ) values were 4.6 and 23.0 mL, respectively. Therefore, this investigation provides a novel approach to utilizing the designated silane agent for the advancement of filtration loss additives in drilling fluids resistant to elevated temperature and high salinity.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Huimin Dai,Jian Lan,Zou He,Liyin Zhang,Ying Xiong,Shanshan Dai
The development of shear-resistant drag reducer agent (DRA) is crucial for enhancing oil recovery, especially during high-speed pumping and fracturing processes where polymer networks are prone to damage, leading to the reduction of the drag reduction (DR) performance. To address this issue, the introduction of nano-silica into the polymer structure, while maintaining good DR, endows the DRA with better shear resistance and salt resistance through its unique cross-linking mode. In this study, a novel shear-resistant and fast-dissolving drag reducer was synthesized through free-radical polymerization using acrylamide (AM), acrylic acid (AA), 2-acrylamide-2-methylpropyl sulfonic acid (AMPS) and KH570 modified nano-silica. The comprehensive properties of drag reducer were studied using conductivity and dissolution time test, microscopic morphology analysis, thermogravimetric analysis, and rheological test. The results suggestion that the PAPO-10@SiO 2 exhibits outstanding characteristics, including rapid dissolution (4 min), excellent salt resistance (DR rate up to 80.41% at a polymer concentration of 500 mg/L) and nano-silica concentration of 1.5 wt%. Moreover, the mechanism of drag reduction was proposed that nano-silica connects the molecular chains through multiple cross-linking effects of chemical cross-linking and physical adsorption, which enhances the stability of the network structure and prevents the destruction of the molecular chain structure by shear force effectively (viscosity retention of 76.9% after shearing for 40 min at 90°C and 170 s −1 ). In summary, this study provides valuable insights for developing polymers with both shear resistance and dissolution properties in aqueous solutions.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 42
·e56112
·
IF 2.7
Xunwang Tang,Zongxue Yu,Junlei Tang,Jiaqiang Huang,Xiuzhu Zhang,Jiajia Hou,Guangcheng Yang
The durability of anion exchange membranes (AEMs) and the balance between ionic conductivity and dimensional stability have been the focus of research. To this end, we propose a new type of AEMs with vinyl imidazole as the in situ cross-linking monomer. The rigid-flexible balance within the membrane was adjusted by changing the arrangement of the internal segments of the polymer and introducing different monomers into the main chain. The results showed that the performance of AEMs could be effectively improved by adopting an ether-free backbone and a cationic cross-linking strategy. The swelling rate of all AEMs was less than 20%. The ionic conductivity of BDCP-80 reached 102.74 mS cm −1 at 80°C. Alkaline stability tests showed that the ionic conductivity of all AEMs remained above 82% after 720 h immersion in 2 M NaOH solution at 80°C. This study demonstrated that the simple in situ cross-linking method can effectively improve the overall performance of AEMs and provide an effective way to develop high-performance AEMs.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 37
·e55934
·
IF 2.7
Feng Zhou,Yu Dai,Wei Qin,Zhenyong Li,Yu Song,Fuli Bian,Quanwei Song,Xianyan Ren
Existing adsorption materials with drawbacks in the weak organic solvents/oil retention ability, slow adsorption speed and low adsorption capacity for alkanes still hardly meet demands of the application field, especially in emergencies. The copolymerization of the long-chain alkenes, 1-octene, with isoprene was designed in this paper to synthesize an adsorption resin (PIOT), instead of acrylate monomers reported in the literature. And trimethylolpropane triacrylate was designed as a crosslinking agent. Results show that the PIOT grows in the form of powders, which are the loose accumulation of nanoflakes with a diameter of about 47.89 ± 11.06 nm. In view of the chain structure and morphology of the PIOT, it can quickly reach the maximum adsorption within 10 s along with a high adsorption capacity for various solvents and kerosene. Even for hexane, the adsorption capacity of the PIOT increases by 345.2% compared with the reported adsorption resin. The oil retention rate of PIOT can be maintained at 86 ± 6% after centrifugation at 1000–3000 rpm for 5–25 min. Compared with commercial activated carbon, the PIOT has outstanding advantages in recycling property and oil retention rate and compared with the reported acrylate adsorption resin, the PIOT has made a great breakthrough in adsorption capacity for alkanes.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Taishun Zhang,Manli Zhou,Bao Zhang,Xiaohong Peng
The use of waterborne polyurethane (WPU) is becoming increasingly prevalent in the effort to address the issue of glare. However, WPU continues to exhibit certain limitations in terms of its performance, including deficiencies in mechanical properties, and low chemical resistance. Consequently, this study employed polyacrylate (PA) modification to create waterborne polyurethane/acrylate (WPUA) hybrid emulsions with a core–shell structure, aiming to enhance their optical properties. Furthermore, different types of alcohol crosslinkers were added to investigate their effects on the optical and mechanical properties of the coatings. Accordingly, this paper presented the design and preparation of a multihydroxyl crosslinking modified antiglare core–shell PU@PA heteropolymer resin utilizing five different hydroxyl-containing crosslinking agents: polyhydroxy alcohols, trimethylolpropane, pentaerythritol, xylitol, and dipentaerythritol. The impact of selecting crosslinkers with varying hydroxyl numbers as well as optimizing their concentrations on particle size, gloss, and tensile strength of WPUA was thoroughly examined. Results revealed that with xylitol as the crosslinker at a mass fraction of 0.9%, the emulsion's average particle size was 680.6 nm, the gloss of the coating reached 42.8 GU, and the tensile strength was 22.31 MPa. The resulting functional WPUA exhibited excellent optical and mechanical properties, offering new insights for the development of antiglare coatings.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Linya Yan,Jinfeng Wang,Ying Mao,Hongshi Zhao,Wenxing Chen,Wangyang Lu
Currently, synthetic materials for soft tissue repair are non-biodegradable and rigid, while biodegradable natural polymer materials exhibit low mechanical strength. This study focuses on creating biodegradable silk patches with superior mechanical properties using warp knitting. Four kinds of silk patches were made, degummed, and their structural parameters and mechanical properties were evaluated. An orthogonal experiment was conducted to investigate the effects of heat-setting temperature and time on the patches' mechanical properties. The results show that the #D patch, with its moderate thickness and density, large and concentrated pores, high strength, and low elongation, closely resembles natural soft tissue. After heat setting at 120°C for 3 min, the mechanical properties significantly enhanced (up to 17.1%). The patch exhibited a longitudinal tensile strength of 276.81 N, transverse tensile strength of 330.73 N, burst strength of 1566.5 N, longitudinal tear strength of 307.33 N, transverse tear strength of 124.66 N, longitudinal suture pullout strength of 53.28 N, and transverse suture pullout strength of 73.89 N. This method of using warp knitting and digital weaving technology allows for the preparation of silk patches suitable for soft tissue repair, with high strength, stability, and porosity, making them ideal for tendon and rotator cuff repairs.
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高影响因子
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