JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 25
·e52384
·
IF 3.057
Bing Yin,Erfa Zhao,Xujiang Hua,Huafeng Xu,Fangyu Fan,Dongmei Qi,Xianle Hua,Jinming Zhen,Dongshuai Hou
The development of high-performance coatings for concrete structures is essential to ensure their durability and service life. However, most of the proposed developed strategies suffer from various limitations, especially regarding the wear and biological-corrosion resistances of the coatings. This work reports a facile and efficient method to prepare effective composite coatings by nano-modification, in which the intercalated composites play structural and functional roles in the corrosion, wear, and biological-corrosion resistances. An in situ assembly synthesis was used to prepare the intercalated composites. The composites exhibited an innovative alternating skateboard structure and a functional composition. The silane-emulsion modified with the composites was prepared and coated on the mortar surface to systematically study its performance at the concrete interface. The results indicate the good dispersion stability of the innovative α-ZrP composites in the silane emulsion and their significant enhancement of the silane coatings' ability to improve the durability of marine concrete. The mechanisms of performance improved by the prepared composites through their unique lamellar structure and interlamellar silver-nanoparticle composition were also examined. The prepared composite coating exhibits a new strategic approach to solve problems associated with concrete applications and provides technical guidance for surface protection of marine concrete structures.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2018
·Vol. 136
·期 11
·47186
·
IF 1.901
Liyuan Sun,Yajie Zhang,Jinggang Wang,Fei Liu,Zhen Jia,Xiaoqing Liu,Jin Zhu
2,5-furandicarboxylic acid (FDCA), a bio-based monomer, was taken as a sustainable alternative to isophthalic acid (IPA) for the modification of poly(ethylene terephthalate) (PET). Results showed that FDCA was more effective than IPA in terms of reducing the crystallization activity of PET, because FDCA is more rigid and highly polar, which will hinder the PET chain packing during crystallization process. Moreover, modification of PET with FDCA resulted in copolyester with higher glass transition temperature, higher tensile modulus, better optical clarity, and gas barrier property, compared to those of IPA. With the addition of 20 mol % FDCA, the resulted copolyester poly(ethylene 2,5-furandicarboxylate- co -ethylene terephthalate) (PEFT 20) was able to keep high transparency even after being annealed at 110 °C for 40 min. However, when 20 mol % of IPA was added, poly(ethylene isophthalate- co -ethylene terephthalate) (PEIT20) easily turned opaque under the same heat treatment. Therefore, less amount of FDCA was required in order to obtain the PET copolyester with better performance. The result indicated that FDCA had great potential to substitute IPA for the modification of PET from the point of view of industrial application. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47186.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 134
·期 24
·
IF 1.86
Xiaoyan Li,Shawei Tang,Xiaoqin Zhou,Shengheng Gu,Kai Huang,Jianjun Xu,Xia Wang,Ying Li
A functional modified montmorillonite (F-OMMT) was prepared by intercalating pristine montmorillonite using phosphonium salt and subsequent grafting through alkyl amino silane coupling. The synergistic effect of F-OMMT on the flame retardancy and char-forming mechanism of intumescent flame-retarded polystyrene- b -(ethylene- co -butylene)- b -styrene (SEBS) composite (SEBS/IFR) was investigated. When 2 wt % F-OMMT was introduced to the SEBS/IFR composite, the limited oxygen index (LOI) value of the composite increased from 24.9% to 26.9%, and the peak heat release rate significantly reduced according to microscale combustion calorimeter (MCC) test. The outer char demonstrated that F-OMMT produced dense and intact nanoparticles with a stabilised graphite structure. Meanwhile, F-OMMT helped form a crosslinking network containing large amounts of P, O, N, and Si in the char layer. Along with IFR, the amino functional group on the clay released nonflammable ammonia in the gaseous phase, the enhanced blowing effect can overcome the high-viscosity resistance of SEBS, more intumescent coating with strengthened clay platelets was then produced. In addition, the tensile properties of SEBS/IFR/F-OMMT composite increased evidently for the good dispersion effect. F-OMMT can serve as an effective and environmentally friendly additive for SEBS/IFR composite. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 44953.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 138
·期 14
·50138
·
IF 2.52
Jieyuan Zheng,Xianwei Zhang,Jun Cao,Rui Chen,Tariq Aziz,Hong Fan,Carla Bittencourt
Harvesting biobased silane coupling agent to enhance the connection between fillers and epoxy matrix is vital to achieve sustainable and environmentally friendly products. In this work, a eugenol based epoxy silane-coupling agent with high purity was prepared and used for the surface modification of nano-sized silica particles. The surface structure composition and physical properties of the modified nano-SiO 2 were characterized through nuclear magnetic resonance, Fourier transferred infrared spectrometer, X-ray photoelectron spectroscopy, and thermal gravimetric analyzer. An epoxy nanocomposite was subsequently prepared by incorporating the resulting modified nano-SiO 2 as an enhancing filler. The nanocomposites glass transition temperature, the morphology of fracture surface, dynamic mechanical properties, and thermostability were investigated. Results showed that the eugenol epoxy silane-coupling agent bearing a long chain structure of benzene ring in the molecular structure could improve the compatibility of silica fillers with epoxy resin and contribute to a better dispersion state in the matrix, thus enhancing the overall performance of epoxy-cured products.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 137
·期 39
·49173
·
IF 2.52
Jiarui Hu,Xiaohui Tian,Jinyu Sun,Jianyong Yuan,Yizhong Yuan
Natural rubber (NR) latex was initially deproteinized, then, the interactions between chitin nanocrystals (ChNCs) and deproteinized natural rubber (DNR) latex particles in an aqueous system and the properties of DNR/ChNCs composites were investigated. Composite films were obtained by casting and evaporating off the prevulcanized DNR/ChNCs complexation rather than simply mixing of DNR latex and ChNCs suspension. The results of DLS and TEM confirmed that this kind of complexation was formed between negative charged DNR and positively charged ChNCs by self-assembly. The tensile strength of composite films containing 4 wt% ChNCs was 25.00 ± 1.42 MPa, which was 3.11 multiples of the pure pre-vulcanized DNR. DNR/ChNCs composite films could provide excellent mechanical properties and avoid allergies caused by proteins in NR latex.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 137
·期 30
·48910
·
IF 2.188
Kai An,Huiting Kang,Dating Tian
By combining the controllable core/shell strategy with graft copolymerization of polysaccharides, controllable core/shell magnetic molecularly imprinted polymers (MIPs) based on konjac glucomannan for selective recognition and enrichment of trichlorfon were fabricated and evaluated. By varying the dose of the polymeric precursors, the shell thickness of the core/shell structure could be regulated over a wide range. The magnetic nanoparticles encapsulated by polymers still had high magnetic performance and could be easily separated by an external magnetic field. The results of adsorption experiments showed that the MIPs could specifically recognize and adsorb trichlorfon with excellent selectivity, repeatability, and stability. The adsorption isotherm of MIPs could be fitted by the Langmuir equation. In addition, magnetic MIPs have been successfully applied to the detection of trichlorfon in real samples. Eco-friendly MIPs would be particularly suitable for the enrichment and separation of pesticide residues in food samples. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 137 , 48910.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 15
·e55221
·
IF 2.7
You Zhang,Wenzhong Ma,Jing Zhong,Ruiqiao Jiang,Zhou Zhou,Sirui Lu,Shuo Wang
As an efficient method to realize photoinduced shape memory, photothermal filler has the characteristics of economy and convenience. However, the aggregation of the photothermal filler in the matrix material will reduce the material's shape memory and mechanical properties. In this work, the photothermal filler of reduced graphene oxide (rGO)-titanium dioxide (TiO 2 ) was prepared by the solvothermal method and then introduced into the polycaprolactone (PCL) matrices to construct a photoresponsive actuator. Because of TiO 2 is uniformly loaded on the rGO surface, rGO-TiO 2 disperses well in the composites. When the GO:TiO 2 ratio of photothermal filler is 1:1, the mechanical properties of PCL-GT-3 are the best, and the tensile strength and elongation at break are 31.8 MPa and 239.5%, respectively, and the crosslinking material under near-infrared light has a good photothermal effect. Due to the induced difference between the in-plane stress of the surface and the volume layer, the shape transformation can be controlled by very low energy (808 nm, 700 mW near-infrared laser). The scheme of controlling the properties of the photoinduced shape memory material by changing only the filler type is conducive to commercial application.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 136
·期 46
·48219
·
IF 2.188
Wan Li,Xingjiang Liu,Jinbi Wu,Linzhi Wu,Ailing Sun,Liuhe Wei
A new two-component modified polyurethane (PU) sealant was designed and synthesized for insulating glass. This sealant was designed based on a crosslinked reaction between a p -chlorophenol-blocked PU pre-polymer (Pre-polymer 2 ) in Component A and a poly-functional hyperbranched polyamine polymer (polyamide resin 300 # ) in Component B. During the synthesis of Pre-polymer 2 , Fourier transform infrared spectral analysis was used to track the process, and the optimal reaction time and temperature were 1.5 h and 80 °C, in the presence of 4, 4′-diphenylmethane diisocyanate (MDI). Different curing agents also used as deblocking agents were screened and it was found that polyamide resin 300 # was a good candidate for the curing reaction. In addition, the low-temperature curing rate was also improved by using dibutyltin dilaurate (DBTDL) and organobentonite together as a composite catalyst. Finally, the prepared two-component modified PU sealant for insulating glass was successfully used in an assembly line with good performance. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 48219.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 26
·e52428
·
IF 3.057
Zhen Lu,Huarong Liu,Xiaoling Cui,Yue Li,Zhijun Lv,Weijian Chen
In this study, we report a new facile method to prepare fluorine-free superhydrophobic separation films by deposition of micron-sized hydrophobic polyhigh internal phase emulsion (polyHIPE) microspheres on stainless steel meshes. The so-called polyHIPE microspheres are polymer ones with interconnected porous structures, which are prepared by γ-ray radiation polymerization of (W/O HIPE)/W double emulsions stabilized by a single emulsifier 12-acryloyloxy-9-octadecenoic acid using a one-step emulsification in this work. The oil–water separation results show that our self-made hydrophobic meshes have excellent oil–water separation efficiency (about 99.5%), outstanding permeation flux (no less than 187.5 L/[m 2 ·min] and the maximum value of 1850 L/[m 2 ·min]). The oil flux of common organic solvents, water contact angle and water intrusion pressure of these hydrophobic meshes can be readily tuned by changing the size, amount and composition of polyHIPE microspheres. It is worth noting that the superhydrophobic meshes remain excellent separation efficiency and stability after 10 cycles in corrosive environments. More importantly, these superhydrophobic meshes can also efficiently separate surfactant-stabilized water-in-oil emulsions. The polyHIPE microspheres decorated superhydrophobic meshes that can easily realize large-scale production have potentially practical applications in sewage treatment or separation/purification.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 19
·52110
·
IF 3.057
Yaochen Zheng,Hui Xu,Heshun Jing,Qingxin Ren,Zhiqing Liu,Zhengguo Gao,Qingfu Ban
Incorporating graphene into epoxy composites is a facile strategy to improve their mechanical performances. However, the uniform and reliable dispersion of graphene within epoxy matrix remains a large challenge owing to the intrinsic difference in chemical properties. Here, pyrene-functionalized polyethylene glycol (Py-PEG-Py) was easily synthesized and utilized as a dispersant to homogenize graphene. The effect of graphene loading on mechanical performances of reinforced epoxy composites was also investigated. As 0.01 to 0.05 wt% of graphene were incorporated in epoxy resin, the resulted composites exhibited excellent improvement in flexural strength and fracture toughness compared with neat epoxy. Typically, the flexural strength increased from 63.57 ± 1.5 MPa for neat epoxy to 108.36 ± 1.9 MPa (about 70.5%) for composite, and the fracture toughness ( K IC ) increased from 1.25 MPa m 1/2 for neat epoxy to 2.15 MPa m 1/2 (around 72%) for composite modified with only 0.04 wt% of graphene and 4 wt% of Py-PEG-Py. Crack pinning caused by well dispersed graphene was contributed to enhancement of the fracture toughness. This work reveals a tiny amount graphene can also largely improve the mechanical properties of composites, providing a feasible approach to disperse graphene and fabricate high performance graphene composites.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 19
·52114
·
IF 3.057
Jianfei Yang,Ruoyun Wang,Xinwen Zhang,Fei Long,Tong Zhou,Lei Liu
Various strategies have been developed to fabricate superhydrophobic surfaces with the guidance of adding rough micro-nano structure and decreasing surface energy. However, it is still a challenge to prepare a superhydrophobic coating with multifunction, eco-friendliness, and broad applicability to substrates. The mussel-inspired polydopamine (PDA) possessing superior material-independent adhesion was considered as the promising candidate material. Herein, a hierarchical superhydrophobic PDA coating was fabricated on Cu substrate via a facile self-assembly method. Thanks to PDA's self-roughening and self-adhesive effects, the coating obtains sufficient surface roughness and good interface adhesion. The superhydrophobic coating exhibits excellent self-cleaning performance and enhanced corrosion resistance based on the surface wettability. Moreover, it possesses the additional functions of UV resistance and self-healing, inheriting from the PDA coating. PDA and the surface modifier are nontoxic, biodegradable, and eco-friendly. Our findings indicate that PDA can be used as an independent structural coating with multiple functions of corrosion protection, UV resistance, and superhydrophobic properties.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 26
·e52453
·
IF 3.057
Qingtao Zeng,Dehui Lai,Piming Ma,Xuejun Lai,Xingrong Zeng,Hongqiang Li
In recent years, piezoresistive pressure sensors with superhydrophobicity have aroused considerable attention. In addition, to comply with “sustainable development” strategy, the sensors fabricated with eco-friendly materials is of great theoretical and practical significance. Herein, tannic acid (TA) was first absorbed on the surface of poly(lactic acid) (PLA) nonwoven fabric by simple dipping method. After that, silver (Ag) particles were in situ generated on the surface to construct roughness with the reduction role of TA by immersing the fabric into silver nitrate aqueous solution. Finally, n-lauryl mercaptan was grafted on the Ag particles via Ag–S bonds to provide low surface energy, and a conductive and superhydrophobic PLA (CSPLA) nonwoven fabric was fabricated. The obtained CSPLA nonwoven fabric had a high water contact angle of 150.3°. The fabric-based piezoresistive pressure sensor possessed high sensitivity, fast response, good stability, and excellent reusability, and was successfully applied for detecting various human motions including voice recognition, joint bending, stomping, walking, and jumping. The fabricated sensor has great application potential in the fields of touchable displays, electronic skins, intelligent robotics, and wearable devices.
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高影响因子
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