JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 25
·e53978
·
IF 3
Xiaocan Zhang,Huixiao Ma,Tong Pei,Ruochen Zhang,Yiran Liu
Incorporating phosphotungstic acid (HPW) in proton exchange membranes (PEMs) is an effective way to improve proton conductivity, but its leakage remains a problem. It can be solved by immobilizing acid in membranes to enhance the stability of PEMs. Herein, we proposed a novel sulfonated poly(ether ether ketone) (SPEEK) composite membrane (SPEEK/HPW@MIL) that was prepared by blending amino-modified MIL-101(Cr) to anchor HPW. In this work, HPW was anchored through hydrogen bond to minimize its leakage and enhance the overall compatibility. The incorporation of MIL-101(Cr)-NH 2 also helped lower the swelling ratio and improve the dimensional stability. Compared with pristine SPEEK and SPEEK/MIL membrane, the proton conductivity of the SPEEK/HPW@MIL composite membrane increased by 26% and 14%, respectively. The superior performance recommended a promising conception for anchoring HPW in PEMs.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 30
·e54102
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IF 3
Pengwei Wu,Jie Liu,Song Wang,Sanxi Li,Tao Tang
Organically modified montmorillonite (OMMT) and Ni 2 O 3 were simultaneously introduced into flame-retardant linear low-density polyethylene/ethylene-vinyl acetate/magnesium hydroxide (LEM) composites. Compared with the LEM composite, the thermal stability, and tensile properties of LEM/ remained basically unchanged when 5 wt% of OMMT/Ni 2 O 3 was substituted for MH. The LOI value increased a little from 27.2 to 27.7%. The data from cone calorimeter test showed that the first and second peak heat release rate was reduced by 19% and 67%, respectively. The total heat release and total smoke production showed a significant reduction by 18% and 36% after incorporation of OMMT/Ni 2 O 3 , respectively. The mechanism study indicated that the combination of OMMT/Ni 2 O 3 cooperates promote the carbonization of the polymer itself into carbon naotubes, which form a more cohesive char layer with magnesium hydroxide during combustion. This is the core factor responsible for the synergistic effect on reducing the heat release and smoke production in the LEM composite.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 31
·e54225
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IF 3
Fengrong Gong,Lihui Jiang,Yanni Gao,Juan Xu,Ting Wang
Ethinylestradiol (EE) is a potent estrogen widely used to treat diseases such as breast cancer, prostate cancer, and menopausal syndrome. The poor aqueous solubility of EE leads to erratic oral absorption, resulting in suboptimal plasma levels. Developing a formulation to enhance the solubility of EE in the gastrointestinal tract would be beneficial to increase the bioavailability of EE. Thereafter, we prepare diethylenetriamine-β-cyclodextrin/ethinylestradiol (DETA-β-CD/EE) complex, aiming to increase the solubility of EE in water, and design and prepare core-shell composite hydrogel capsules with aldocellulose and hydroxyethyl cellulose as the core and sodium alginate as the shell. The stability, swelling, drug release behavior and biocompatibility of the core-shell hydrogel capsules are carefully investigated. And the results show that the prepared hydrogel capsules have the controlled and sustained release ability of soluble DETA-β-CD/EE, can achieve pH-responding to intestinal fluid, and are non-toxic to normal human cells.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 27
·e54025
·
IF 3
Wenting Zhu,Shouyang Zhang,Jie Fei,Chang Li,Hongtao Yang,Longqi Liu
The development of carbon fibers/polymer composites (CFPCs) has made a profound impact on varied application prospects in the transmission and braking fields, where interface engineering between fibers/matrix holds the key to co-enhanced mechanical and tribological properties. Herein, we designed a honeycomb-inspired Ni-Co layered double hydroxides (Ni-Co LDHs) modified CFPCs, in which Ni-Co LDHs interconnected nanosheets were grown in-situ onto the carbon fibers (CFs) surface via the oxidation-assisted hydrothermal method, and then polymer matrix fully impregnate and filled with both the CFs and LDHs porous containers by capillary forces. Benefiting from the special interface, the Ni-Co LDHs grafted CFs reinforced polymer composites (Ni-Co LDHs@CFs composites) possessed the excellent mechanical strength and outstanding tribological properties. The LDHs@CFs composites had 32% improvement in the tensile strength, and 84.9% strength retention ratio after the hydrothermal aging process. Furthermore, the friction coefficient was increased by 24% and wear rate was dramatically decreased by 42% from 6.148 × 10 −14 to 3.557 × 10 −14 m 3 (N m) −1 , indicating better torque transmitting capacity and anti-wear properties. This work could provide a valuable reference for the construction of biomimetic interface to simultaneously improve the mechanical and tribological properties of the CFPCs.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 27
·e54019
·
IF 3
He Gong,Kai Zhong,Fanfan Chen,Mingyuan Yi,Lihong Wan,Zhifen Wang,Jianhe Liao
To effectively screen pathogens or eliminate allergy symptoms caused by the protein in natural latex products, the strength of the natural latex film must be improved and the water-soluble protein content in the latex products must be reduced. In this article, response surface methodology was used to optimize the reaction conditions for the preparation of hydroxyapatite (HA), and the reinforcement and adsorption of water-soluble proteins on natural rubber latex (NRL) by HA modified by coupling agent KH550 were studied. Modified HA was homogenously dispersed in the NRL, and the tensile and tear strengths of the rubber film were increased by 37.45% and 40.86%, respectively. In addition, modified HA adsorbs the water-soluble protein from the latex film. Compared with pure NR film, its protein content is reduced by 50.79%. This article has a reference value for the preparation of high-performance natural latex film with low protein content.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 22
·e53903
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IF 3
Rongli Zhu,Zejun Pu,Hongbo Hou,Xianyong Li,Xu Wang,Dayang Yu,Pan Zheng,Fang Wu,Jiachun Zhong
This work synthesized the pure poly (decamethylene terephthalamide) acid (PA10T) and a series of PA10T/10I through an efficient one-pot melt polymerization method. The structures, thermal behavior, crystallization performance, and mechanical properties of PA10T and PA10T/10I were investigated by FT-IR, DSC, TGA, POM, XRD, and mechanics performance testing, respectively. The thermal analysis demonstrates that the melting temperature of PA10T/10I gradually decreased with the increase of isophthalic acid (IPA) copolymerization proportions. Specifically, it was observed that, the T m1 of pure PA10T was 299.5°C, while the T m1 of PA10T/10I-4 with a linear downward trend was 284.7°C. And the introduction of IPA copolymerization has an obvious beneficial effect on the thermal stability of PA10T/10I ( T d,5 varied from 429.5 to 434.5°C) with a wider temperature range of processing, which could potentially be applied in high-temperature scenes. POM and XRD were used to characterize the crystallization behavior of all samples further. It was discovered that although adding IPA did not alter the crystal structure of PA10T, it dramatically reduced the size of crystalline grains and increased the number of crystal nuclei. In addition, the copolyamides possess excellent mechanical properties, and the tensile strength of PA10T/10I varied between 42.91 and 46.89 MPa, the bending strength varied between 76.69 and 85.83 MPa, and the izod impact strength varied between 25.41 and 29.82 kJ m −2 . Moreover, the influence of the IPA comonomer of copolyamides PA10T/10I on melting points, thermal stability, crystallization behavior, and mechanical characteristics was investigated. This work provides a reference for preparing biobased semi-aromatic copolyamides PA10T/10I with outstanding processing performance, excellent thermal characteristics, and adjustable mechanical properties.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 24
·e53954
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IF 3
Jian Wang,Wen Sun,Ming He
Thermoresponsive polymer hydrogels have great potential in the fields of smart window and information encryption due to the drastic changes in transmittance caused by the phase transition at specific temperatures. The synthesis of thermoresponsive hydrogels with a wide range and sensitive temperature response is current research goal. Here, we demonstrate a polymethacrylamide (PMAAm) hydrogel with the upper critical solution temperature (UCST) ranging from 62 to −1°C by simply polymerizing the monomer in different concentrations of acetic acid (Ac) solutions. The hydrogel exhibits sensitive temperature response with a temperature hysteresis within 2°C and can maintain stable transmittance changes after 200 cycles of testing. The phase transition mechanism is revealed by combining ultraviolet visible spectra, differential scanning calorimetry, Fourier transform infrared spectra, dynamic light scattering and scanning electron microscope measurements. This thermoresponsive hydrogel can be applied in smart window and information encryption. The smart window prepared with the hydrogel had a very high Δ T lum (The luminous transmittance modulation, 94.4%), ensuring daytime illumination and privacy protection at night. Meanwhile, the smart window exhibits an excellent thermal insulation capability for energy-saving buildings. The hydrogels with different UCST are flexibly combined to display designed patterns at different temperatures, demonstrating the ability of the hydrogels to be used for information encryption.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 20
·e53795
·
IF 3
Chunming Chen,Xingrong Zeng,Zhenlun Peng,Zhonghua Chen
Poly (terphenylene-methyl piperidine-biphenyl) was synthesized using biphenyl, terphenyl, and N-methyl-4-piperidone as raw materials to prepare anion exchange membranes (AEMs). Biphenyl and terphenyl as the copolymer monomers were used to regulate the morphology and properties of the AEMs. The flexible copolymer backbone promoted efficient transport of hydroxyl ions. The obtained AEMs show a high ion conductivity of 49.16 mS/cm at 80°C. Furthermore, the stable piperidine cation and polyarylene chain contributed to the excellent alkaline stability of AEMs that showed only 0.63% deterioration in ion conductivity after soaking in 1 M KOH at 80°C for 720 h. The peak of single cell power density of 54 mW cm −2 was obtained at a load current density of 150.1 mA cm −2 using an aqueous solution containing 1 M methanol and 1 M potassium hydroxide as the anode fuel, and pure oxygen gases as the cathode fuel at 30°C.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 16
·e53747
·
IF 3
Hongwei Zhang,Yanchao Zhang,Haixiang Gao,Wenfeng Zhou
Traditional formaldehyde resin adhesives can release harmful substances, which endanger human health and contribute to environmental pollution. The development of alternative high-performance, environmentally benign adhesives is therefore of great importance. In this study, we evaluate the effect of several additives on the properties and performance of soy protein isolate adhesive, a bio-based adhesive. Triglycidyl isocyanurate, a chemically cross-linker, 1,3-dimethyl imidazolium hexafluorophosphate ([MMIM]PF 6 ), a crystalline ionic compound, and borax, which is covalently reactive with hydroxyl groups, were added to soy protein isolate to build a dense network structure. The wet shear strength of the adhesive prepared with all additives was 109% greater than that of the unmodified soy protein isolate adhesive (1.34 vs. 0.64 MPa). This improvement is due to the synergistic enhancement of the bonding strength through covalent cross-linking and hydrogen-bonding interactions. In addition, the anti-fungal properties of the adhesive were significantly improved through the use of chemical additives. This work provides a new approach for the preparation of high-performance, antimicrobial, bio-based adhesives, which will be beneficial in the development of greener alternatives to commonplace chemicals.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 140
·期 8
·e53513
·
IF 3.057
Jingru Sun,Huan Liu,Sheng Xu,Ying Zhu,Chunmiao Xia,Lei Gan,Rongli Zhang,Cuige Zhang,Zongcheng Miao
A new strategy was developed to prepare nanoscale porous carbon spheres (PCSs) using cross-linked chitosan/poly(γ-glutamic acid) colloidal particles as precursor. The fabricated cross-linked chitosan/poly(γ-glutamic acid) colloidal particles (Ca 2+ /CS/γ-PGA CPs) were prepared from the self-assembly of negatively charged poly(γ-glutamic acid) and positively charged chitosan, and the cross-linking of Ca 2+ in aqueous solution, via the electrostatic interaction. After lyophilization, the Ca 2+ /CS/γ-PGA CPs power was obtained, followed by carbonization in a tube furnace under N 2 atmosphere. Finally, the products were washed by hydrochloric acid, obtaining PCSs with hierarchical pore structure and super-hydrophobicity. The prepared PCSs exhibited excellent separation performance for oil-in-water emulsions.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 140
·期 8
·e53509
·
IF 3.057
Wei Wang,Gang Chen,Shulong Wu,Yuan Liu,Qi Wang
The design of flame retardant one-component epoxy resin (EP) with long pot life, low curing temperature and fast curing rate has been challenging in the industry. Herein, we synthesized a phosphate-containing imidazole fluid (TA) as the thermal latent curing agent of EP. Based on simple structural design, TA endows EP with excellent curing properties, storage properties, and flame retardant properties. According to DSC results, EP/TA systems exhibit low curing temperature and fast curing rate during operation. The rotary rheometer test confirms that the viscosity curve of EP/TA system maintains long-term stability at 40°C. The X-ray photoelectron spectroscopy (XPS) data reveals that TA releases imidazole intermediates and phosphorous compounds during curing. The former provides conditions for fast curing of EP, while the latter gives EP intrinsic flame retardant properties. With the addition of 20 wt.% TA, EP/TA-4 achieves UL-94 V-0 rating and 28.5% of LOI value. The study of flame retardant mechanism shows that the flame retardancy of TA mainly comes from the protective effect of phosphorus-rich char layer, the dilution effect of non-combustible gas and quenching effect of phosphorous compound. Besides, due to no solvent involved, the synthesis strategy of TA is environmentally friendly, showing a great potential of industrial application.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 140
·期 8
·e53507
·
IF 3.057
Lilan Huang,Lankun Ma,Haimei Chen,Lei Qiao,Leitao Zhang,Jian Pan,Jinwei Li,Yuzhong Zhang
Developing dislysis membranes with outstanding hemocompatibility is the key of hemodialysis used for curing the kidney malfunction. Herein, polylactic acid (PLA) membrane with high water flux (640.2 L m −2 h −1 ) and bovine serum albumin (BSA) rejection (>97%) is prepared and subsequently modified by heparin-mimetic sulfonated graphene oxide (SGO) via modified mussel-inspired method. The (NH 4 ) 2 Fe(SO 4 ) 2 serves as Fenton catalyst significantly accelerates the oxidized polymerization of dopamine (DA) in DA- g -SGO to form polydopamine- g -SGO (PDA- g -SGO). The uniform immobilization of SGO significantly improves the hydrophilicity and electronegativity of the PLA membranes, inhibiting platelets adhesion. Moreover, the sulfonic group of SGO plays the role of anticoagulant as heparin. The obtained PLA/PDA- g -SGO membrane exhibits excellent hemocompatibility with longer recalcification time (230 s) and lower hemolysis ratio (1.6%) than those of original PLA membrane (120 s, 10.7%). This study demonstrates a potential way to improve the hemocompatibility of polymeric membranes.
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高影响因子
危险品化学品经营许可证（带存储）