JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Cun-ying Zhang,De-fang Zhao,Yu-hui Xie,Dong Feng,Feng Wu,Delong Xie,Yuxin Liu,Yi Mei
Polylactic acid (PLA) is well regarded for its excellent environmental friendliness; however, its flammability presents a significant barrier to wider applications. Developing highly flame-retardant PLA (with a limiting oxygen index, LOI, greater than 30%) using simple, general methods remains a challenge. In this study, maleic anhydride (MA) was used to modify 9,10-dihydro-9-oxa-10-oxide (DOPO), enhancing its thermal stability and interaction with the PLA matrix. Additionally, by leveraging the carbonization effect of nano-SiO 2 , DOPO-MA was compounded with nanosilica to further improve PLA's flame-retardant properties. As a result, a highly flame-retardant PLA with an LOI of 31.3% and a UL-94 V-0 rating was successfully prepared using 5 wt.% DOPO-MA and 3 wt.% SiO 2 . Furthermore, total heat release (THR) and peak heat release rates (pHRR) of PLA decreased by 7% and 25%, respectively. Detailed analysis of the flame-retardant mechanism revealed that nano-SiO 2 significantly increased the residual char content and promoted the formation of a more stable graphite carbon structure. Moreover, silica effectively suppressed the generation of combustible gases in the pyrolysis products of PLA, collectively enhancing its flame-retardant properties. This study presents a straightforward and scalable approach for designing highly efficient phosphorus/silica-containing synergistic flame retardants, offering valuable insights into PLA flame retardancy.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2025
·
IF 2.8
Jianhang Qiu,Xinrui Chai,Heguo Han,Linjian Sang,Yuxuan Sun,Yaohan Chen,Shenghai Li,Suobo Zhang
Polyurea emerges as a promising material for acid nanofiltration membranes due to its high hydrogen-bonding capacity and low electron density from carbonyl groups. However, conventional polyurea-based composite membranes suffer from limited separation performance and acid stability due to insufficient hydrophilicity and conjugated structures. In this study, a novel monomer, 3,5-diisocyanate benzoyl chloride, was synthesized and employed as the organic-phase precursor in interfacial polymerization to fabricate thin-film composite (TFC) membranes with polyurea-amide active layers. During polymerization, the acyl chloride groups undergo partial hydrolysis, introducing carboxylate anions into the active layer. The NF membrane shows over 98.6% rejection of MgSO 4 at pH 7, and membrane water permeability can reach 3.41 L m −2 h −1 bar −1 . Additionally, the aqueous phase monomer 2,4-diaminobenzenesulfonic acid was incorporated to construct a fully aromatic active layer, which strengthens intermolecular conjugation and acid resistance. Comparative analysis demonstrated that the synthesized membranes outperform traditional polyurea-based membranes (prepared via toluene diisocyanate and fatty amines) in acid stability: after soaking in 20 wt% H 2 SO 4 for 100 days, the MgSO 4 rejection remained nearly unchanged. This study establishes a molecular design strategy integrating hydrophilic functionalization and conjugated aromatic structures to address critical limitations in polyurea membranes, offering a pathway toward robust nanofiltration systems for acid-resistant applications.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Shucheng Liu,Bo Li,Xiangxiang Huang,Zhe Kong,Guiqing Cheng,Zhongwei Wang,Qing Yu,Shihui Han,Long Chen
Carbon black/SiO 2 /LLDPE (CB/SiO 2 /LLDPE) is a commonly used polymer material with a positive temperature coefficient (PTC). However, the inferior reproducibility of PTC significantly restricts its service life. The objective of this study is to enhance the PTC reproducibility of CB/SiO 2 /LLDPE material. Polyethylene glycol (PEG) was chosen as the additive, and its effects on SiO 2 dispersion, PTC reproducibility, and electrothermal performance were studied in detail. A more stable SiO 2 /CB synergistic filler network was formed after the incorporation of PEG, which results in a significant improvement in PTC reproducibility. The variation of PTC intensity change rate after 10 heating–cooling cycles decreased by 19.4% after the incorporation of 5 wt% PEG. Additionally, the electrothermal performance of the PEG modified CB/SiO 2 /LLDPE composites was also enhanced with a 15.3°C increase in equilibrium temperature under a DC voltage of 140 V. This study offers an effective strategy for developing high-performance PTC materials.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Ying Zhang,Zheng Fang,Mingwei Wang,Chaolu Niu,Zhe Liu,Qichang Liu,Wenxu Tang,Jiameng Xu,Qiulin Chen,Potao Sun
Recent advances in microencapsulation technology have emerged as a promising approach for achieving self-healing of electrical and mechanical damage in epoxy resin. Nevertheless, current implementations face dual challenges: (1) Dependency on external stimuli (elevated temperature, pH variations, or humidity) for microcapsule activation, precluding non-contact self-healing mechanisms; (2) Compromised matrix performance through reduced mechanical strength and dielectric integrity. To address these issues, this work innovatively presents a method to fabricate magnetic-targeted natural photosensitive microcapsules. By incorporating Fe 3 O 4 @SiO 2 magnetic nanoparticles into the shells of photosensitive microcapsules via interfacial polymerization with a core-shell structure, the microcapsules gain targeting migration ability and UV shielding function. The resulting magnetic-targeted UV light-sensitive microcapsules/epoxy composite insulating materials can achieve non-contact damage repair using natural light. Moreover, the magnetic targeting enables directional migration of the microcapsules to the damage site in the matrix, significantly enhancing their utilization rate. Results show that, at a microcapsule doping concentration of 2 wt%, the tensile properties of the epoxy resin increased by 16.3% compared to pure epoxy resin, with minimal change in insulation strength and dielectric properties. Furthermore, the magnetically targeted natural photosensitive microcapsules can effectively repair surface cracks and electrical tree damage in epoxy resin, restoring the composite material's insulating property to 92.1% of its pre-damage state after self-healing.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Zhuqing Li,Shicong Pei,Kaixuan Shao,Xiaojun She,Mingdi Yang,Kehua Zhang,Hang Li,Yunsheng Ding,Xianhai Hu
Excitation wavelength-dependent fluorescent materials are a class of materials whose fluorescence emission spectra drift significantly with excitation wavelength. Herein, carbon nitrides (CNNPs) emitting blue fluorescence were synthesized by a one-pot method using urea as a conjugated monomer and L-phenylalanine as a co-precursor. Waterborne polyurethane-based carbon nitride (CNNPs-WPU) with excitation wavelength-dependent fluorescence properties was produced by accessing amino(-NH 2 )-rich CNNPs to waterborne polyurethane (WPU) using a modified acetone method. The results show that CNNPs-WPU has good storage and thermal stability. The fluorescence quantum yield (15.8%➔17.6%) and fluorescence lifetime (5.441 ns➔8.305 ns) of CNNPs-WPU were higher than those of CNNPs. It is worth mentioning that between 310 and 390 nm, with the rising excitation wavelength, the emission wavelength of CNNPs-WPU redshifts from 411 to 443 nm, CNNPs-WPU exhibits obvious excitation wavelength-dependent fluorescence characteristics, and the emission intensity increases with the increase of excitation wavelength, which makes it potentially applicable in the fields of anticounterfeiting, bioimaging, and light-emitting devices, etc. Moreover, the CNNPs-WPU uses water as the dispersed phase, which is green and environmentally friendly; it has a broad application prospect.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Chenrui Zhang,Qingchuang Lu,Meng Song,Zhenyang Luo,Lei Duan,Yanlong Luo
Many high-strength polyurethane materials have been developed in the past, but combining other functionalities such as high transparency, adhesion, and self-healing properties is still a great challenge. We prepare a mechanically robust polyurethane elastomer with high transparency and self-healability. The relationship between its structure and properties is elaborated. Acylsemicarbazide (ASCZ) and urethane groups are introduced into the hard segments of the polyurethane elastomer, and by modulating the spacer groups between the ASCZ and urethane groups, the fine modulation for the hydrogen bonding density and the hard domain size is realized. By the exquisite regulation of molecular structure, the HMDI-SPH elastomer with sebacic dihydrazide (SPH) as the chain extender, polytetramethylene ether glycol (PTMEG) as the soft segments, and methylene-bis(4-cyclohexyl isocyanate) (HMDI) as the isocyanate can achieve a high elasticity due to the rich and hierarchical hydrogen bonds. Such hydrogen bonds impede the crystallization of PTMEG and facilitate the formation of homogeneously distributed hard-phase microdomains. The HMDI-SPH elastomer exhibits good mechanical robustness (tensile strength of 45.7 MPa, toughness of ~140.8 MJ m −3 ), transparency (transmittance > 95%), and self-healing (self-healing efficiency of 86.6%). Meanwhile, HMDI-SPH has good adhesive strength on a variety of substrates such as walnut (~10.81 MPa) and steel (~14.60 MPa).
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Zhiyuan Zhang,Yan Wang,Chen Wang,Fangzheng Yu,Yang Yuan,Zheng Zhao
Self-healing hydrogels have become a hot research topic in the field of wound care due to their ability to prevent secondary damage to the dressing and reduce the risk of wound infection. The aim of this study was to develop a hydrogel network system with excellent self-healing and antimicrobial properties, which is particularly suitable for wound dressing applications. The hydrogel stability was enhanced by forming long chains through lipoic acid (LA) disulfide bonding and inhibiting chain depolymerization via polygallic acid (PGA)-mediated S Ar bonding. In addition, poly(lysine) (PL) was doped into the system through electrostatic interactions to further enhance the structural strength and antimicrobial properties of the hydrogels. This noncovalent gel system endowed the hydrogels with softness and fluidity, enabling them to adapt to various wound shapes. Through experimental results, it was shown that the hydrogel not only possessed enhanced mechanical strength and remarkable self-healing ability, but also exhibited good cytocompatibility. Antimicrobial tests have shown that it is more than 99.9% effective against Escherichia coli and Staphylococcus aureus . Thus, PLA/PGA/PL hydrogel with remarkable self-healing, antimicrobial, and biocompatibility properties shows great potential for application as wound dressings and becomes a strong candidate in the field of hydrogel dressings.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 138
·期 46
·51374
·
IF 3.125
Rongnian Xu,Xiaoduo Zhao,Shuanhong Ma,Zhengfeng Ma,Rui Wang,Meirong Cai,Feng Zhou
Anisotropic hydrogels are appealing with their merits of similar biochemical and structural properties to the biological tissues. However, the mechanical properties of current anisotropic hydrogels need to be further improved. Herein, three kinds of novel anisotropic poly(2-hydroxyethyl methacrylate) (pHEMA), poly(acrylamide) (pAM), and poly(acrylamide-co-acrylic acid) (p[AM-co-AA]) sugarcane composite hydrogels were prepared successfully by filling the hydrogel monomer precursor into porous aligned sugarcane nanofibers network and then performing subsequent free radical polymerization. The hydrogel matrix and sugarcane nanofibers network were combined closely together through hydrogen bonding interaction. The anisotropic sugarcane composite hydrogels exhibit good flexibility and elastic recovery properties upon encountering mechanical crimping and twisting. In typical case, the as-prepared pHEMA sugarcane composite hydrogel can exhibit high anisotropic tensile strength of 2.37 and 0.54 MPa, while differential tear strength of 0.36 and 0.78 N/mm, along the parallel and vertical nanofibers directions. Finally, anisotropic lubrication behaviors were found and investigated systematically for those three kinds of sugarcane composite hydrogels when water was used as lubricant. Our current work proposes a simple and universal strategy for developing bioinspired anisotropic functional composite matters such as artificial skin, flexible sensor, and cartilage lubrication materials.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2018
·Vol. 135
·期 28
·46503
·
IF 1.901
Shuangquan Lai,Yong Jin,Hanping Li,Xiaopeng Sun,Jiezhou Pan
A simple and effective approach to induce hierarchical self-assembly of Y-shaped amphiphilic triblock polyurethane/poly(acrylic acid) complexes system in aqueous media is reported here. Hydrogen bonding interactions and electrostatic repulsive forces, which can be controlled by regulating the pH condition of complexes solution, were the main driving forces to induce morphological transitions. With the gradual decrease of pH value, a variety of micro-/nanostructures including giant vesicles, small vesicles, multi-layer three-dimensional (3D) porous network structures and “bulk” structures were successively obtained. Among these structures, the micron-scale multi-layer 3D porous network structure formed from block copolymer/homopolymer complexes was rarely reported. Therefore, this research demonstrates that the hierarchical self-assembly of polymers complexes in aqueous media is a viable approach to construct different interesting micro-/nanostructure assemblies, and supplies a new clue for the fabrication of multi-layer 3D porous network structures. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46503.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 136
·期 48
·48362
·
IF 2.188
Xianwu Jing,Youquan Liu,Wei Li,Yuan Xu,Zhiyu Huang
A water-miscible nonionic surfmer (AC-TX100) was synthesized based on Triton X-100 and acryloyl chloride. Then, a terpolymer P(AM/AA/AC-TX100) was synthesized by free radical polymerization in aqueous solution and intended to be used as drag reducing agent (DRA). The DRA was defined to be P(AM 87.32 /AA 12.46 /AC-TX100 0.22 ) according to 1 H NMR and elemental analysis, the molecular weight was 2.12 × 10 6 g/mol according to scattering method. DRA shows excellent performance in drag reduction (DR). The highest DR rate of 76% can be obtained when DRA concentration is 0.023% in fresh water; while in brine containing 3% NaCl, DR rate decreases, and it is necessary to increase the concentration to 0.05% to ensure that DR rate is higher than 70%. SEM and cryo-TEM show that DRA forms a network structure in aqueous solution, and the tightness of this structure has a direct influence on DR performance. Specifically, DRA molecules stretch into the whirlpools generated by water at high flow rates, reducing the quantity and intensity of whirlpools, thereby lowering the energy loss and the friction. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 48362.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 35
·e52831
·
IF 3.057
Jing Wang,Meiling He,Meixuan Du,Ce Zhu,Yuling Jiang,Yi Zhuang,Lin Qi,Zheng Liu,Yubao Li,Limin Liu,Ganjun Feng,Danqing Wang,Li Zhang
Complex shaped bone defects that need to be filled are very common in clinic. But after filling, gaps are inevitably left between substitutes and host bone due to the poor conformability of preformed implants, hence hindering bone regeneration. Therefore, based on our previous study, we here used the bioink (named PPG) composed of polyurethane, polyacrylamide, and gelatin with optimized composition ratio to three-dimensionally (3D) print an inorganic/organic composite hydrogel scaffold with self-expandability to fill irregular bone defects and bioactivity to accelerate bone healing through adjusting the content of bioactive ceramic (BC). The results indicated that, the 3D printed BC/PPG scaffold had a rough surface on each fiber; with the incorporation of BC powders, the composite hydrogel scaffolds in swelling experiments could perform a comparable self-adaptability to PPG hydrogel scaffold; the bioactive ions including Ca, Mg, and Si could be released from the composite scaffold and induce the rapid deposition of bone-like apatite. The mechanical tests proved that the BC(10%)/PPG scaffold was the top performer under compression. The in vitro cell assessment illustrated that compared with PPG hydrogel scaffold, the BC/PPG composite scaffolds were more favorable to the proliferation and spreading of bone mesenchymal stem cells (BMSCs).
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 135
·期 6
·45804
·
IF 1.86
Hao-Hao Ren,Dong-Xia Xu,Ting Yu,Jia-Chao Yang,Gang Zhang,Xiao-Jun Wang,Jie Yang
Three kinds of high-molecular-weight compatibilizers [copoly(1,4-phenylene sulfide)-poly(2,5-phenylene sulfide amine)] (PPS-NH 2 ) containing different proportions of amino units in the side chain) were synthesized by the reaction of dihalogenated monomer and sodium sulfide via nucleophilic substitution polymerization under high pressure. The intrinsic viscosity of the obtained copolymers was 0.354–0.489 dL/g and they were found to have good thermal performance with melting point ( T m ) of 271.3–281.0 °C and initial degradation temperature ( T d ) of 490.0–495.7 °C. There was an excellent physical compatibility between PPS-NH 2 and the pure industrial PPS. The results of dynamic mechanical analysis and macro- and micromechanical test showed that the selective compatibilizer PPS-NH 2 (1.0) (1.0% mol aminated ratio) can improve the mechanical and interfacial properties of polyphenylene sulfide/glass fiber (PPS/GF) composite. The macro-optimal tensile strength, Young's modulus, bending strength, and notched impact strength of 5%PPS-NH 2 (1.0)/PPS/GF composite raised up to 141 MPa, 1.98 GPa, 203 MPa, and 6.15 kJ/m 2 , which increased 12.8%, 9.4%, 4.1%, and 13.8%, respectively, comparing with the pure PPS/GF composite (125 MPa, 1.81 GPa, 195 MPa, and 5.40 kJ/m 2 , respectively). © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 45804.
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高影响因子
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