JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 30
·e52694
·
IF 3.057
Liang Chen,Zhuding Dai,Wenxue Lou,Pingping Jiang,Pingbo Zhang,Yanmin Bao,Xuewen Gao,Jialiang Xia
In order to endow water-based polyurethane with special functionality, vegetable oil-based waterborne polyurethane with self-healing properties is synthesized. Firstly, soybean oil-based emulsifier (GA-ESO) was prepared by epoxy soybean oil and glutaric acid without solvent and catalyst. Then, two Diels−Alder (DA) diols were prepared by the DA reaction between N , N ′-(4,4′-methyldiphenyl) bismaleimide, 4-maleimide phenol and furfuryl alcohol, respectively. Finally, GA-ESO and DA diols used as the raw material was reacted with isophorone diisocyanate to synthesize a series of soybean oil-based waterborne polyurethane with self-healing behavior. The effects of DA diol on the properties of polyurethane films and the self-healing process and mechanism of polyurethane membrane were investigated. The results showed that after the addition of DA diol, the particle size of polyurethane emulsion increased from 28.8 to 85.3 nm, the tensile strength was improved from 0.3 to 12.6 MPa, and the water contact angle was enhanced from 68.5° to 84.2°. In addition, it can be observed that with the addition of DAdiol, the polyurethane film had self-healing behavior at high temperature, and the highest self-healing efficiency can reach 100%.
研究领域:
材料科学
·
高分子化学
·
化工
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 138
·期 31
·50760
·
IF 3.125
Xiaochen Yu,Jia Zheng,Zhaoxi Zhou,Qihui Chen,Maochun Hong,Heqing Fu
Firstly, cerium dioxide(CeO 2 ) was modified by 3-(Methylacryloxyl)propyltrimethoxy silane (KH-570), and modified CeO 2 (mCeO 2 ) was prepared. Then poly (urethane-acrylate) was modified by mCeO 2 , and poly (urethane-acrylate)/modified CeO 2 (PUA/mCeO 2 ) composites with ultraviolet absorption property were prepared. The morphology, thermal hydrophobicity, mechanical properties, optical properties, and UV-absorption properties of PUA/mCeO 2 composites were studied. XRD and SEM analysis showed that the modified CeO 2 had better dispersion in the matrix than that of pure CeO 2 . Ultraviolet–visible spectrum and thermogravimetric analysis were used to characterize the optical properties and thermal stability of PUA/mCeO 2 composites. The results showed that with the increasing of the mCeO 2 content, the UV-absorption property of PUA/mCeO 2 composites was improved gradually. When the content of mCeO 2 is 3%, the absorption of ultraviolet of PUA/mCeO2 composites is about 5 times of pure PUA film, and the absorption band is mainly in the UVA section. The thermal stability of PUA/mCeO 2 composites was improved with the adding of mCeO 2 . With the increasing of mCeO 2 content, the contact angle of PUA/mCeO 2 composites increased significantly. And the UV-absorption mechanism of PUA/mCeO 2 Composites was studied. UV-curable PUA/mCeO 2 composites have good UV absorption property and water resistance. They will be used in the sun screen and protect people's skin.
研究领域:
材料科学
·
高分子化学
·
纳米技术
·
光学
·
涂层与薄膜
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Fuchong Li,Yang Gao,Chen Yu,Hailong Yang,Gai Guo Liu,Wei Cao,Jinshan Guo
The traditional batch synthesis of liquid rubber faces issues such as low monomer polymerization concentration, poor uniformity of the reaction system, and inadequate heat dissipation, resulting in an unsatisfactory synthesis efficiency. This study presents a method for the rapid and efficient synthesis of high vinyl 1,2-polybutadiene liquid rubber using butadiene as the monomer and n -butyllithium as the initiator. By applying continuous flow microchannel reactors, the limitation of traditional synthesis method can be overcome. The addition of a modifier in the raw material promotes the formation of high vinyl structure. The preparation of liquid rubber requires the addition of a large amount of metal lithium initiator. However, for aerospace sealants, there is a requirement for low metal ion content. To address this, we employed different methods to reduce the metal ion content in the liquid rubber and increase its purity. Ultimately, we achieved the synthesis of high-purity polybutadiene liquid rubber with 1,2-vinyl content exceeding 88%, narrow molecular weight distribution, and tunable molecular weights. This research will provide technical guidance for the industrial application of polybutadiene synthesis in continuous flow microchannel reactors.
研究领域:
化学工程
·
高分子科学
·
材料科学
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 30
·e52687
·
IF 3.057
Mingshuai Fan,Zhiyuan He,Lu Wu,Ping Tang,Yuezhen Bin
Flexible sensors based on conductive hydrogels have shown surprising potential in the field of electronic skin and human–computer interaction. However, pure water in the hydrogel will inevitably freeze at low temperature or evaporate quickly in dry environment, resulting in the failure of hydrogel as a flexible sensor. Here, inorganic ions (Li + and Cl − ) and glycerol were introduced into the polyacrylamide/sodium carboxymethylcellulose (PAM/CMCNa) composite hydrogel networks through the strategy of solvent replacement. The optimized hydrogel had a quite large elongation at break of 2000%, and a breaking strength of more than 0.14 MPa. The synergistic effect of inorganic ions and glycerol enabled the hydrogel to maintain a good flexibility in a wide temperature range of −20–45°C, which could meet the work needs of the hydrogel in high temperature or extremely cold environments. The hydrogel showed a very wide working range of 1000%, a fast response time of 150 ms, and a high stability and repeatability of 500 cycles during strain sensing detection. Besides, the hydrogel could capture the large and subtle body movements accurately and stably. Therefore, this hydrogel may be applied as in wearable sensing devices used in extreme environments.
研究领域:
材料科学
·
传感器
·
柔性电子
·
可穿戴技术
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2012
·
IF 1.289
Pei Chen,Xinbing Chen,Zhongwei An
Crosslinkable sulfonated poly(arylene ether sulfone)s (SPAESs) were synthesized by copolymerization of 4,4′-biphenol with 2,6-difluorobenzil, 4,4′-difluorodiphenyl sulfone, and 3,3′-disulfonated-4,4′-difluorodiphenyl sulfone disodium salt. The corresponding covalent-ionically crosslinked SPAESs were prepared via the cyclocondensation reaction of benzil moieties in polymer chain with 3,3′-diaminobenzidine. The crosslinking significantly improved the membrane performance, that is, the crosslinked membranes had the lower membrane dimensional swelling, lower methanol permeability, and higher oxidative stability than the corresponding precursor membranes, with keeping the reasonably high proton conductivity. The crosslinked membrane ( CS5 ) with measured ion exchange capacity of 1.47 meq g −1 showed a reasonably high proton conductivity of 112 mS cm −1 with water uptake of 42 wt % at 80°C, and exhibited a low methanol permeability of 2.1 × 10 −7 cm 2 s −1 for 32 wt % methanol solution at 25°C. The crosslinked SPAES membranes have potential for PEFC and DMFCs. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
研究领域:
材料科学
·
能源科学
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 134
·期 39
·45344
·
IF 1.86
Xiao-hong He,Rui-hong Liang,Cheng-mei Liu,Wei Liu,Rui-yun Chen,Xiao-xue Hu,Jun Chen
Pectin has been used in the development of safe and effective drug delivery systems because of its unique physicochemical and biological characteristics. However, it still needs to be modified to overcome some inherent drawbacks. In the present study, pectin was alkylated by bromododecane. The C 12 -alkylated pectin (PC 12 ) can form strong hydrogels in the presence of Ca 2+ . Such hydrogels were explored to prepare bovine serum albumin (BSA)-loaded microspheres (PC 12 -MS). The BSA encapsulation yield of PC 12 -MS was significantly higher than that of microspheres prepared with the original pectin (PC-MS). Differential scanning calorimetry analysis indicated that interactions existed between BSA and pectin during the preparation of microspheres. Release tests showed that PC 12 -MS almost avoided BSA release in simulated gastric fluids, which was verified by environmental scanning electron microscopy analysis, and exhibited an effective controlled release throughout the simulated gastrointestinal tract compared to PC-MS. In addition, an MTT assay showed the biocompatibility of C 12 -alkylated pectin. Thus alkylated pectin may serve as a potential protein drug carrier. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 45344.
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 138
·期 34
·50854
·
IF 3.125
Xiangfei Sun,Ping Yang,Shaohua Wang,Honglong Xing
Because of the good fluorescence of zinc phthalocyanine-phenolic resin (ZnPc-PFR) photosensitizer and large specific surface area of mesoporous silica nanoparticles (MSNs), a highly efficient nano-drug carrier system, denoted as ZnPc-PFR@MSN, was constructed for photothermal therapy (PTT) and pH-sensitive drug delivery. The facile hydrothermal reaction was used to synthesize ZnPc-PFR nanoparticles in one-step. After loading the as-synthesized ZnPc-PFR nanoparticles into MSNs, and a good high drug-loading rate (143.7 mg g −1 ) to the anticancer drug of Adriamycin (DOX) could be obtained. Thus, a novel nanosphere with the merits of good fluorescence, high drug-loading rate (143.7 mg g −1 ), better sustained-release properties, and photothermal properties (reached 43.23°C within 260 s) was prepared. The as-synthesized multifunctional composites make it a good candidate in fluorescence imaging, PTT, and drug delivery.
研究领域:
生物医学工程
·
纳米医学
·
肿瘤学
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 136
·期 31
·47777
·
IF 2.188
Yanhong Ma,Qifei Xie,Xinzhong Wang
A series of microencapsulated phase-change materials (micro-PCMs) with binary cores and acrylate-based copolymer shells were prepared. The micro-PCMs contained octadecane and butyl stearate as binary-core materials. Allyl methacrylate, ethylene glycol dimethacrylate, 1,4-butanediol diacrylate (BDDA), and 1,6-hexanediol dimethacrylate were respectively introduced to copolymerize with divinylbenzene (DVB) to form different microcapsule shells. In this work, the influence of the types of core and shell materials and core–shell weight ratios on the thermal properties of micro-PCMs was studied. The chemical structures, morphologies, thermal properties, and thermal insulation properties of the wallboards were all tested and discussed. Scanning electron microscope photographs show that these micro-PCMs have relatively spherical profiles and compact surfaces with diameters ranging from 10 to 80 μm. Differential scanning calorimetry results indicated that their microencapsulation efficiency ranged from 48 wt % to 80 wt %. A thermogravimetric analysis demonstrated that these micro-PCMs can ensure their thermal stability below 210°C. Finally, a thermal insulation wallboard fabricated with synthesized P(BDDA- co -DVB) micro-PCMs showed excellent thermal energy storage performance, keeping the temperature fluctuation within 2.5°C. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47777.
研究领域:
材料科学
·
热能工程
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2014
·Vol. 132
·期 9
·
IF 1.64
Wenqiu Chen,Quantao Li,Quanyuan Zhang,Zushun Xu,Xianbao Wang,Changfeng Yi
A series of amine-terminated and anhydride-terminated hyperbranched polyimides (HBPIs) were successfully prepared with various commercial dianhydrides and a novel BB′ 2 -type aromatic triamine, 2,4,6-tris[4-(4-aminophenoxy)phenyl]pyridine, with a symmetrical triaryl-substituted pyridine segment and prolonged flexible linkages. The chemical structure of the triamine monomer and the hyperbranched structure of the resulting polymers were verified by Fourier transform infrared spectroscopy and 1 H-NMR spectroscopy. The resulting HBPIs, which mainly held an amorphous morphology, exhibited improved organosolubilities in several strong polar aprotic solvents, good heat resistance with glass-transition temperature values in the range 218.6–311.0°C, and excellent thermal stabilities in both N 2 and air [the temperature at 5% weight loss ( T 5% ) in N 2 was higher than 529.8°C and the T 5% in air was higher than 465.1°C]. The obtained HBPI films also showed outstanding mechanical properties with tensile strength, tensile modulus, and elongation at break values of 86.4–101.3 MPa, 1.73–2.04 GPa, and 5.07–10.67%, respectively; considerable optical transparency; low water absorption; and neutral interface wettability. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 41544.
研究领域:
材料科学
·
高分子化学
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 132
·期 30
·
IF 1.768
Chao Bian,Jinglin Tan,Depeng Ma,Yuling Li,Jie Zhang
The blending of polymethyltrifluoropropylsilicone-modified acrylonitrile–butadiene rubber (MNBR) and fluorosilicon rubber (FSR) at 70 : 30 ratio was investigated. The grafting of mercapto-functionalized polymethyltrifluoropropylsilicone onto acrylonitrile-butadiene rubber (NBR) by thiol-ene reaction was carried out with 2,2′-azobisisobutyronitrile as initiator in a Haake torque rheometer. The rheological properties of NBR grafting obtained at varying dosages of polymethyltrifluoropropylsilicone in a Haake torque rheometer were studied using torque curves. Grafting reaction was confirmed by 1 H nuclear magnetic resonance and energy-dispersive X-ray spectroscopy. Results of scanning electron microscopy and dynamic mechanical analysis showed better compatibility of MNBR/FSR blend than NBR/FSR reference blend. Meanwhile, the macro-mechanical properties of the blend significantly improved. The tensile strength and tear strength of MNBR/FSR blend were improved to 14.34 MPa and 44.94 KN/m, respectively, which were 2.92 MPa and 13.03 KN/m higher than those of NBR/FSR reference blend. The low-temperature brittleness of the blend was improved to −57°C, an increase of −6°C compared with that of NBR. These results indicated that MNBR/FSR blend at 70 : 30 ratio had improved compatibility because of the grafting chains that acted as interfacial agents. The low-temperature resistance of the blend was also enhanced. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42328.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 138
·期 36
·50899
·
IF 3.125
Lingli Ni,Shanshan Li,Yongtao Liu,Xiaowu Jiang,Peng Cai,Liangdong Feng,Shizhong Zhang,Xiaoyan Gao
The development of eco-efficient and environmental friendly active anti-corrosion coatings for metallic substrates represents a fundamental milestone in many engineering applications. Herein, a new type of active corrosion protection coating was successfully synthesized simply based on waterborne polyurethane (WPU) and nanocontainer of Ce 3+ modified palygorskite (Ce-PAL). Particularly, the nanocontainer of Ce-PAL was achieved via a facile and green process by cation exchange in water. Inductively coupled plasma atomic emission spectrometry (ICP) revealed that Ce 3+ had successfully incorporated into PAL nanofibers with a loading amount of 10.334 g/kg. The salt immersion test, electrochemical potentiodynamic measurements and electrochemical impedance spectroscopy (EIS) demonstrated that the incorporation of Ce-PAL only with 2 wt% into WPU led to a significant improvement of their corrosion protection properties. Finally, according to the results of scanning electron microscopy with energy dispersive X-ray spectroscopy, the active anti-corrosion mechanism of Ce-PAL/WPU coating was proposed.
研究领域:
材料科学
·
腐蚀与防护
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 132
·期 40
·
IF 1.768
Huan-Ling Wu,Xiao-Xiao Hou,Christopher Branford-White,Xiao-Zhu Sun,Lei Tao,Syeda Um-I-Zahra,Li-Min Zhu
Calcium carbonate (CaCO 3 )/alginate inorganic–organic hybrid particles were synthesized and deposited on to the surface of cotton fabrics with a novel one-step procedure. The effects of the Ca 2+ /CO 3 2− /alginate molar ratio on the cotton matrix were investigated. The optimization of the process resulted in a regular shaped hybrid microparticles, and scanning electron microscopy revealed that the particles were uniformly distributed on the surface of the fibers. Dynamic light scattering showed that the particles were about 2 μm in diameter. Moreover, transmission electron microscopy images demonstrated that the core–shell structure of the particles existed along with CaCO 3 evenly enfolded into the alginate layer. An X-ray diffraction pattern displayed that the alginate/CaCO 3 hybrid microparticles were a mixture of calcite and vaterite crystal. Fourier transform infrared spectroscopy indicated that CaCO 3 /alginate hybrid particles formed in situ were the only deposited materials. The thermogravimetric analysis curve indicated a certain mass ratio of the alginate and CaCO 3 in the hybrid particles. Furthermore, the drug-loading and drug-release properties of the hybrid microspheres were studied, and the results show that the water-soluble diclofenac sodium could be effectively loaded in the hybrid microparticles and the drug release could be effectively sustained. Finally, both of the microparticles and modified fabrics had good cytocompatibility. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42618.
研究领域:
材料科学
·
生物医学工程
·
纺织科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）