JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 140
·期 6
·e53427
·
IF 3.057
Bing Yin,Xujiang Hua,Fangyu Fan,Dongmei Qi,Kailu Han,Youqing Hou,Dongshuai Hou
Improving the permeability of concrete is one of the important measures to extend the service life of concrete. In addition, for marine engineering, sewerage projects, and so on, mechanical stability and microbial induced corrosion of concrete structures cannot be ignored. We demonstrated a method to prepare high-performance super-hydrophobic (SHP) coating using functional zirconium phosphate (ZrP) and polydopamine (PDA) as the primary materials. The micro-nano rough structures were constructed on the concrete surface by alternating organic–inorganic assembly guided by each other. The coatings' apparent morphology, composition, and structure were analyzed using various surface analysis techniques. Based on the construction of micro-nano rough structures by the induced assembly of functional ZrP, the silane treatment significantly improved the water contact angle of the coating (WCA = 154° ± 3°), and the coating exhibited relatively high wear resistance, reaching 135° WCA even after 30 friction cycles. The water absorption of the specimens treated with the SHP composite coating was reduced by 79% to treated with silane. Meanwhile, the SHP composite coating showed excellent antimicrobial and anti-ice properties, due to the role of the functional ZrP and alternating organic–inorganic assembly. It was expected that the composite coating might potentially promote and accelerate applied superhydrophobic anticorrosive coating development for marine concrete durability.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 10
·e53589
·
IF 3
Licong Jiang,Ming Gao,Leqin Xiao,Xinlong Wang,Weiliang Zhou
The use of intumescent flame retardants to retard polyethylene usually had the disadvantages of low flame retardancy efficiency and poor compatibility between intumescent flame retardants and low-density polyethylene (LDPE), which led to the reduction of mechanical properties of materials. In order to solve these issues, the microencapsulated ammonium polyphosphate (MAPP) and microencapsulated aluminum hypophosphite (MAHP) with polyurea were prepared through the interfacial polymerization of water-in-oil (W/O) microemulsions. The flame retarded polyethylene composites with MAPP and MAHP were manufactured. The LDPE composites with 17.3 wt% of MAPP and 3.9 wt% of MAHP possessed a LOI value of 27.3% and achieved the V-0 standard. The PHRR and THR were remarkably decreased by 30.3% and 31.1% compared with that of the LDPE. Furthermore, the tensile strength of LDPE/MAPP-MAHP was 19.1% higher than that of LDPE/APP-AHP because of good dispersion and compatibility of MAPP and MAHP with LDPE. This work provides a new method to prepare flame-retardant LDPE with high performance and the related mechanisms were discussed in detail.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 11
·e53612
·
IF 3
Xiaoshuang Zuo,Shan Ye,Onome Ejeromedoghene,Bin Wang,Bingbing Cui,Guodong Fu
Fabrication of composites with hierarchically anisotropic structure and excellent mechanical properties is still challenging. Inspired by biological tissues with excellent anisotropic microstructure, in this study, a simple method for preparing robust anisotropic polyvinyl alcohol/glass fiber (PVA/GFs) composites with superior mechanical properties was proposed, which based on hydrogen bonding interactions and freeze–thaw method under tensile conditions. Surface-initiated atom transfer radical polymerization (SI-ATRP) was applied for grafting polymers onto the glass fiber. The glass fibers grafted with polymers (GFs) were introduced into PVA. After that, the freeze–thaw method under tensile conditions was adopted to control the formation of hierarchically anisotropic structure, which composed of anisotropic polymer network and orderly aligned glass fibers. The results also showed that the strength and toughness of the composites were significantly improved, due to the interfacial hydrogen bonding interactions between PVA and GFs. Therefore, this study could provide a meaningful idea for preparing anisotropic biomaterials with prominent properties for artificial tissues.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 10
·e53590
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IF 3
Sisi Yuan,Yongjun Wang,Xiujun Wang,Donghua Liao,Ming Duan,Shenwen Fang
The block polyether demulsifier prepared by ring-opening polymerization of ethylene oxide and propylene oxide under high temperature and high pressure is the most widely used demulsifier for water in crude oil emulsion. It has the high synthesis risk and cost. Therefore, the development of non-block polyether demulsifier has attracted more and more attention. In this article, a new type of demulsifier was sythesized by radical polymerization of acrylate and cationic monomer. It was found that the copolymer PMA-co-PDBC of methyl acrylate (MA) and benzyldimethyl [2-[(1-oxoallyl)oxy] ethyl] ammonium chloride (DBC) synthesized in the mixed solvent of dipropylene glycol methyl ether and water had a good performance. When dosage of PMA-co-PDBC was 200 mg/L, the dehydration rate of water in crude oil emulsion with 50% water content can reach 80% at 80°C within 4 h. Structural and interface properties analysis presented that PMA-co-PDBC had a microblock structure similar with block polyether and it can effectively reduce the strength of W/O interfacial film to realize the demulsification. Although the demulsification performance of PMA-co-PDBC was not better than block polyether, its preparation safety and cost are much better. The results of this article can provide a new option for the development of crude oil demulsifier.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 10
·e53594
·
IF 3
Zejun Zhang,Fan Ye,Guosheng Ai,Huanyu Liu,Guanxin Zeng,Liwei Shen,Ying Yang,Huaikui Yuan,Xuening Feng,Yuanzhu Mi
A highly branched PNDC demulsifier with 2,6-naphthalenedicarboxylate as centronucleus was prepared by an efficient “one-pot” strategy. The product was characterized by FT-IR, 1 H-NMR, and TGA. The bottle test was performed to explore the effect of temperature, settling time, pH value, and concentration on the demulsification efficiency (DE). The DE reached an optimal value of 94.63% when the concentration of PNDC, settling time and operated temperature were 100 mg/L, 60 min and 70°C, respectively. Also, the DE could reach 91.58% when the concentration was only 20 mg/L at the same conditions. It showed that PNDC had an excellent performance in W/O emulsions with an extremely low concentration. Especially, PNDC could be used over a wide pH range (4–12) and high salinities, indicating that it had a good salt, acid and alkaline tolerance. In addition, the interfacial tension (IFT), surface tension (SFT), elastic modulus and micrograph analysis were carried out to investigate the possible mechanism. This work provides a highly branched demulsifier with high DE for the demulsification of stable W/O emulsions.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 10
·e53603
·
IF 3
Rongli Zhu,Zejun Pu,Hongbo Hou,Xu Wang,Xianyong Li,Dayang Yu,Jiachun Zhong,Ying Song
In this work, the antistatic effect of antistatic agent (AA) on semi-aromatic poly (decamethylene terephthalamide) (PA10T) with 30 wt.% glass fiber (GF) was investigated. The PA10T/AGF antistatic composites with excellent thermal characteristics, balanced toughness, and notched impact strength were prepared through one-step melt blending, and added the AA and GF to the PA10T matrix. Meanwhile, the structure, morphology, thermal properties, and mechanical properties were examined in detail by FT-IR, SEM, TGA, DSC, and tensile and impulse testing. The results showed that the antistatic GF dispersed well in the PA10T matrix and interacted well with the PA10T matrix. The antistatic properties increased with the increase of AA content, and AA/GF-5 composites had the best antistatic effect when AA content was 25 wt.%. However, with the increase of AA content, the melt temperature of PA10T/AGF composites decreased, while the machining performance and thermal stability of PA10T/AGF composites increased. The composites' tensile strength and breaking elongation followed a rising and falling pattern with increasing AA concentration. Notwithstanding, the notched impact strength of PA10T/AGF composites decreased and then increased. Therefore, this work provides us with a deep understanding of the antistatic effect of AA on polymers.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 10
·e53600
·
IF 3
Jing Zhou,Yuhan Xu,Weihong Guo
Hot-melt pressure-sensitive adhesives (HMPSAs) with polystyrene-isoprene-styrene (SIS) as the backbone material are widely used in transdermal drug delivery systems (TDDS) because of their high cohesive strength and drug-carrying capacity. However, it is restricted by its high hydrophobicity when loaded with hydrophilic drugs. In this study, HMPSAs with amphiphilic properties were created by mixing SIS with fatty alcohol polyoxyethylene ether (AEO-9) and polyethylene glycol (PEG) of different molecular weights to improve the ability of HMPSAs to deliver hydrophilic drugs. The effects of different molecular weights of PEG on the hydrophilicity of HMPSAs were also investigated. Additionally, gardenia glycosides and oleanolic acid were selected for drug release experiments. Compared to untreated HMPSAs, HMPSAs modified with AEO-9 and PEG2000 could convert from hydrophobic to hydrophilic. The contact angle could be reduced from 91.8 to 25.6°, and the 24-hour water absorption could be raised by 170%. The drug release experiments demonstrate that SIS/AEO-9/PEG2000 enhances the release efficiency of the hydrophilic drug gardenia jasminoides by 69%. In summary, as a novel amphiphilic medicinal HMPSAs, SIS/AEO-9/PEG offered a broad application promise in hydrophilic drug release.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 140
·期 8
·e53518
·
IF 3.057
Dongsheng Li,Haoran Lu,Xinyi Yan,Haohan Wan,Guangming Yan,Gang Zhang
A novel tri-acyl chloride monomer containing reductive thioether units (T-TDC) was prepared. It was conducted to partially replace trimesoyl chloride (TMC) and react with m-phenylenediamine (MPD) by interfacial polymerization to prepare a series of T-TDC/TMC/MPD copolymer thin-film-composite reverse-osmosis polyamide membranes. Through this routine, the reductive thioether units was introduced into the film molecular chain to protect amide bonds from being chlorinated by oxidizing during the membrane cleaning process. The enhanced chlorine resistance of these resultant membranes was revealed by FT-IR and XPS characterization: it could be found thioether was prior to amide oxidation, and its oxidation process can be divided into two steps (the thioether units was first converted to sulfoxide groups, and then further oxidized to sulfone groups). Through this routine, the active chlorine was consumed partially, then the amide bond was protected. The experiment result is consistent with the DFT theoretical calculation. The chlorine exposure concentration of the normalized flux and rejection decreased to 1 increased gradually with the addition of copolymerization ratio of T-TDC, especially for the sample 20%-TTDC-TFC, its chlorine exposure concentration was 3 and 4 times higher respectively than that of 0%-TTDC-TFC when its normalized flux and rejection at 1. In addition, it can be found that the polar sulfone and sulfoxide groups can form hydrogen bonds to prevent the membrane from degrading immediately. This method provides an effective way for improving the service life of RO film.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 13
·e53668
·
IF 3
Pengxin He,Haihong Pu,Xinfeng Li,Xiaoqiong Hao,Jianhua Ma
Flexible and highly conductive fiber has attracted considerable attention with its massive potential in functional fabric, stretchable circuits, and wearable electronic devices. Herein, we prepared a novel secondary structure composite fiber based on aramid nanofibers (ANF)-reinforced thermoplastic polyurethane (TPU) fiber accompanied by carbon nanotube (CNT)-coated on its surface. The composite fibers' dispersibility, micromorphology, and application were systematically investigated. The TPU/ANF-0.5 wt% sample showed a robust reinforcing effect, as Young's modulus and tensile strength reached 17.2 and 20.2 MPa, respectively. Meanwhile, the conductive coating layer in the outer frame was formed via a TPU solution with 10 wt% CNT content, which gives the fiber excellent flexible electrical conductivity. Such a unique structural design enables the fiber to be closely attached to human skin and monitor human movement. In addition, this TPU/ANF@CNT composite fiber can also be used for light and electric heating. The photothermal equilibrium temperature can reach 120°C in 50 s, and the electrothermal equilibrium temperature increases to 62°C under 30 V. In summary, this secondary structure composite fiber with excellent electrical and mechanical properties might have great practical application potential in wearable electronic devices.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 12
·e53653
·
IF 3
Mingyuan Yi,Siwen Xiong,Yuxuan Zhang,Lihong Wan,Fanfan Chen,He Gong,Sitong Yan,Lin Fang,Zhifen Wang
Since the outbreak of COVID-19, the demand for natural latex products with increased mechanical properties and aging resistance has surged. Based on the excellent adhesion and antioxidant properties of polydopamine (PDA), we employed a one-pot method to modify the surface of silica substrates using PDA containing a polyphenol structure, to prepare a reinforced silica-PDA composite latex material with antioxidant properties. As expected, the silica-PDA composite achieved both uniform dispersion and good interfacial interactions with natural rubber latex (NRL). In addition, compared with common NRL/silica films, the mechanical properties of the NRL/silica-PDA film were significantly improved; specifically, silica-PDA can highly-enhanced the mechanical property of NRL film from 24.94 to 32.18 MPa of tensile strength. Further, the antioxidant activity of the silica-PDA film exceeded that of commercially available antioxidant D. Considering the notable performance boost of silica-PDA composites on NRL films, we believe that the treatment of silica with natural polyphenols offers a convenient and facile new route for the preparation of environmentally friendly multifunctional silica additives.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 10
·e53597
·
IF 3
Ying Zhu,Yumeng Luo,Xiran Tang,Lifen Tong,Xiaobo Liu
The intrinsic thermal conductivity coefficient of polyarylene ether nitrile (PEN) is low, which brings difficulty in meeting the need of advanced electronic equipment and microelectronic integrated circuit. In this research, h-BN was mixed into PEN as fillers in view of its remarkable thermal conductivity and electrical insulation, and the influence of filler content on properties in many aspects was studied in depth. The microcosmic arrangement and interfacial compatibility between fillers and matrix were studied by SEM. AR, DSC, TGA and hot-disk methods were performed to analyze thermal property. The results confirmed that thermal conductivity of composites was increased to 0.5444 Wm −1 K −1 at 30 wt% filler content, having 22.89% increment compared with PEN copolymer without addictive. Moreover, this PEN/h-BN composite shows excellent thermal properties with T g of 214.83°C, and T 5% of 535.09°C. Furthermore, the dielectric constant and insulation performance of composite with 30 wt% h-BN are improved, while the dielectric loss is kept low of 0.02 at 1 kHz. The tensile strength is 62.3 MPa and elastic modulus is 3567.5 MPa. In a whole, the 30 wt% h-BN/PEN composite prepared in this work exhibit great potentiality and promising prospect in the field of electronics.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 11
·e53624
·
IF 3
Liaoyuan Wang,Yuli Sun,Fayu Chen,Guiguan Zhang,Siguang Yi,Dunwen Zuo
This work aims to evaluate the effects of polyamide (PA) and nano-Al 2 O 3 on the mechanical properties of epoxy resin (EP) and obtain the optimal addition content of PA and nano-Al 2 O 3 . Epoxy matrix composite (EMC) is prepared via the solution blending method using the PA as the curing agent, toughening agent, and the nano-Al 2 O 3 modified with the silane coupling agent as the filler. Then it is tested for tensile, hardness, impact and wear resistance performances. The results show that when the ratio of PA to EP varies in the range of 40 wt.% to 80 wt.%, increasing the PA content can improve the impact toughness and plasticity of EMC but reduce its hardness, tensile strength and wear resistance. When the content of PA is 60 wt.% of EP, the elongation at break and impact strength of EMC are increased by 66.4% and 12.9%, respectively. The mechanical performances of EMC can be enhanced by loading nano-Al 2 O 3 fillers in a specific range. When the content of nano-Al 2 O 3 is 2 wt.% of EP, the elastic modulus, the tensile strength and the wear resistance of EMC are increased by 27.9%, 20.8% and 49%, respectively. The research can provide a valid technical reference for the industrial application of EMC materials.
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高影响因子
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