JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 45
·e53021
·
IF 3.057
Mingzhe Li,Bin Cao,Ruiqi Shang,Hongwei Mei,Liming Wang
Silicone rubber is used as an antipollution flashover material in outdoor insulation, which is susceptible to aging and has a shorter service life than other candidates. Microcracks are a common aging phenomenon that are difficult to be detected and repaired. The microcapsule self-healing technology can be used to repair microcracks and extend the service life of silicone rubber. This study considers hydrogen silicone oil as a representative of the polydimethylsiloxane healing agent system. Poly(urea–formaldehyde) microcapsules containing the hydrogen silicone oil are synthesized by in situ polymerization. The effects of the emulsifier concentration, initial pH value, initial ratio of the core–shell material, and sodium chloride (NaCl) concentration on the synthesis are investigated. Accordingly, the properties of the microcapsules before and after long-term storage are analyzed. The results demonstrate that microcapsules synthesized using poly(ethylene-alt-maleic anhydride) (EMA)+ polyvinyl alcohol (PVA) as the emulsifier have satisfactory morphology and performance, where the best synthesis conditions are 0.13 wt% EMA, 0.05 wt% PVA, initial ratio of the core–shell material of 1.5:1–2.0:1, initial pH value of 3.5–4.0, and 2 wt% NaCl. In long-term storage, the core material is well protected by the shell material. The synthesized microcapsule can serve as a material in the self-healing system of silicone rubber.
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. 139
·期 12
·51842
·
IF 3.125
Kun Cong,Zhenhui Liu,Jiyu He,Rongjie Yang
Polyether polyurethane elastomers prepared by polyisocyanate N100 and ethylene oxide-tetrahydrofuran copolymer (PET) were compared to that polytriazole polyethylene oxide-tetrahydrofuran (PTPET) elastomers prepared by alkynyl-terminated polyethylene oxide-tetrahydrofuran (ATPET) and glycidyl azide polymer (GAP) at a comparative molecular weight. The polyether polyurethane (PET-N100) elastomers turned out to have better mechanical properties than that of PTPET/GAP elastomer. In order to explore the effectiveness of nitrogen-enriched structures in the field of flame-retardancy, PET-N100 and PTPET/GAP elastomers were tested by cone calorimetry. The PET-N100 elastomer exhibited an inferior performance of flame-retardancy to that of PTPET/GAP elastomer. Therefore, a modification of the terminal hydroxyl group in GAP with 4,4′-methylene-bisphenyl-isocyanate (MDI) and flame-retardant diethyl bis(2-hydroxyethyl) amino methyl phosphonate (DBMAP) was attempted and characterized by FT-IR, NMR, and gel permeation chromatography. It was found that the synthesized GAP-MDI-DBAMP could serve as a novel curing agent for ATPET, which would endow the novel PTPET elastomer a combination of the advantageous properties, that is, the outstanding mechanical properties from PET-N100 elastomer, favorable flame-retardancy from PTPET/GAP elastomer and DBAMP. The thermogravimetry analysis/DTG, DSC, tensile strength test, and swelling analysis proved that PTPET/GAP-MDI-DBAMP elastomer had excellent thermal stability and mechanical strength.
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
·
2019
·Vol. 137
·期 12
·48485
·
IF 2.188
Dan Meng,Jiazhuo Xie,Geoffrey I. N. Waterhouse,Kun Zhang,Qinghua Zhao,Shuo Wang,Shuo Qiu,Kaijun Chen,Jinxi Li,Chizhen Ma,Yue Pan,Jing Xu
The accumulation of nonbiodegradable petrochemical-based polymers in the environment motivates the development and use of low-cost, eco-friendly, and biodegradable polymers. A series of biodegradable poly(butylene adipate-co-terephthalate) composites reinforced by sustainably sourced nanochitin were successfully prepared using melt blending and compression molding methods. Structural, thermal, and mechanical characterizations of poly(butylene adipate-co-terephthalate) (PBAT)/nanochitin composites were performed. SEM revealed that the nanochitin was uniformly dispersed throughout the PBAT matrix at low contents (<2 wt %), while DSC analyses revealed a corresponding increase in the crystallinity (32.6% enhancement) of the PBAT matrix. The tensile strength and elongation at break of the PBAT/nanochitin composite containing 0.5 wt % nanochitin were higher by 82.5 and 64.2%, respectively, compared with pristine PBAT. The Chitin-0.5 composite also showed improved thermal stability compared with PBAT (the char yield improved by 8%) due to the uniform dispersion of nanochitin in the PBAT matrix. The enhanced performance of the PBAT/nanochitin composites, prepared without an added compatibilizer, informs the development of improved biodegradable PBAT-based polymers. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 48485.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 47
·e53178
·
IF 3.057
Fenghua Li,Man Liu,Dexiang Yan,Zonggong Yin,Jiahong Xiao,Bin Sun,Yuhong Shen,Tingting Gao,Qinze Liu,Guowei Zhou
With the current situation of high-energy consumption and high pollution in the textile industry, developing an eco-friendly and universal dyeing technology is urgently required. Towards this goal, in this study, the dyeing technology with room temperature, salt-free, zero release, and rapid cycle dyeing for 20 min was realized using a polymer of catechol and polyethyleneimine as a dye. The dyed fabrics exhibited washing, rubbing, and perspiration fastness characteristics for practical needs, mainly attributing to the hydrogen bonding and π–π interaction between the dye molecules and the fabrics. Benefiting from the unique dyeing technology, the dyed fabrics show excellent leveling properties and adjustable chromaticity. Importantly, the mussel-inspired coating strategies are universally applicable, so the dyeing technology can be applied to various fabrics. Consequently, the environmentally friendly dyeing process based on low-cost catecholamine polymers as a dye will have a broad application prospect in the printing and dyeing industry. Moreover, the antibacterial tests showed that dyed cotton cloth, mulberry silk, and polyester fabrics all have favorable antibacterial properties, especially dyed mulberry silk fabrics have a greater than 90% bacterial reduction rate for both Escherichia coli and Staphylococcus aureus .
研究领域:
纺织科学
·
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 20
·52144
·
IF 3.057
Jingyu Ren,Xiangbin Dong,Yanjie Duan,Lin Lin,Xiaowei Xu,Jichao Shi,Runping Jia,Dandan Wu,Xinyao He
A series of self-healing waterborne polyurethane (WPU) films utilizing reversible covalent bond acylhydrazones diol (PA) as chain extender were successfully synthesized. The self-healing performance of WPU with different content of chain extender PA has been systemically characterized via cut-and-healing tests and mechanical quantitative evaluation. The film can repair cracks through acylhydrazone exchange reactions within 12 h. When the content of PA is 1.5 wt%, the WPU has the highest self-healing efficiency of 90.5%. Meanwhile, the effect of PA mass fraction on the particle size distribution, mechanical ability, crystallization, water resistance properties, and thermal stability of WPU were evaluated. With the introduction of acylhydrazone bonds, the hydrophobicity of the WPU material was enhanced, while achieving self-healing performance, which solves the problem of aging and replacement of materials. These results indicated that the self-healing WPU exhibited great application prospect as a versatile material.
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. 139
·期 18
·52084
·
IF 3.125
Tao Chen,Cheng Cai,Yan-ting Zhang,Zeng Zhao,Shu-yan Zhang,Chong-gang Wu,Xing-hou Gong,Jiang Hong,Tao Hu
The paradox of obtaining dielectric elastomers (DEs) with both low modulus and high-dielectric properties has long been puzzling researchers in this field. To solve this problem, a preliminary attempt is made here by solution compounding polyphenol nanoparticles modified multiwalled carbon nanotube (PNs@MWCNT) with polydimethylsiloxane (PDMS) to obtain PDMS based DEs with excellent electromechanical properties. The PNs layer can improve the interfacial interaction between MWCNT and PDMS probably through interfacial hydrogen bonding, thus improving the dispersion of PNs@MWCNT in PDMS. Compared with pure MWCNT filled PDMS nanocomposites, despite the hardening effect brought by the filler network, a softening effect (i.e., decreased cross-linking) by the finer filler-dispersion enhances in PNs@MWCNT/PDMS, resulting in lower moduli. Meanwhile, the as-prepared PNs@MWCNT/PDMS composites exhibit high permittivity, low-dielectric loss and high-breakdown strength. Finally, the PNs@MWCNT/PDMS nanocomposites show excellent electromechanical properties with a largest actuated strain of 7.4% at a breakdown strength of 13.1 kV/mm, which is 2.2 times that (3.3%@13.3 kV/mm) of MWCNT/PDMS and 3.9 times that (1.9%@18.8 kV/mm) of neat PDMS.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 138
·期 48
·51601
·
IF 3.125
Qianru Xu,Yaqi Zhang,Ruquan Zhang,Yongzhen Tao
Polyelectrolyte hydrogels with spinnability and electroresponsive were prepared from xanthan gum (XG) and gelatin. Oscillatory rheological measurements were utilized to explore mechanical properties and thermal stability of the resultant XG-Gelatin5 hydrogels. The XG-Gelatin5 hydrogels possessed higher strength and larger critical strain than these of the XG hydrogels, demonstrating existence of synergistic interactions. The XG-Gelatin5 hydrogels were stable in temperature range of 20–60°C, and gradually release drug with controlled manner in neutral and acid medium at 37°C. The self-recoverable and thixotropic XG-Gelatin5 hydrogels were extruded to form hydrogel fibers, and the dried hydrogel fibers rapidly bend towards cathode under applied voltage. Long hydrogel fibers were harvested with enhancement by Fe 3+ ions, and were weaved and braided to obtain hydrogel fiber constructs. The XG-Gelatin5 hydrogel fibers with electroresponsive and controlled drug release possess potential applications in biomaterials, tissue engineering, and drug carrier fields.
研究领域:
生物材料
·
组织工程
·
药剂学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 46
·e53140
·
IF 3.057
Xuechen Zhuang,Shufen Zhang,Wei Ma
Composite films composed of biocompatible polymers are used widely in biomedical and food packaging areas. In this work, a new composite film with superior mechanical properties and biodegradability is prepared. The film is composed of biocompatible polyhydroxyethyl acrylate (PHEA) and starch, whose molecular chains are cross-linked using sucrose polyaldehyde (SPA), a green sucrose derivative. The composite film exhibits an optimal tensile strength and tensile strain of 11.5 MPa and 147.7%, respectively, which can be ascribed to the chemical cross-linking and hydrogen bond interactions between PHEA and starch. The tests confirm that the composite film shows satisfactory mechanical properties, hydrophilicity, and biodegradability, and thus should have wide applicability in biomedicine, food packaging, and other fields.
研究领域:
材料科学
·
生物医学
·
食品包装
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 138
·期 47
·app51414
·
IF 3.125
Keqian Gong,Xiangyang Xu,Qi Liu,Zexian Han,Wei Huang,Chenyu Huang,Xiangning Huang
Solution blending approach was introduced to prepare flexible Polycarbonate (PC)-based composited films with excellent transparent projection performance. After modified by an aluminate coupling agent DL-411(ACA-1), alumina (Al 2 O 3 ) possesses improved dispersity. There may form oxygen bridge between aluminum atoms on Al 2 O 3 and ACA-1. With the long aliphatic chain directing outwards, the compatibility between PC and modified Al 2 O 3 was significantly improved. The dispersion of Al 2 O 3 particles in PC was therewith promoted. After vacuum drying, well-blended mixtures were developed and PC films containing Al 2 O 3 clusters can be prepared. The composite films have good light transmission and diffuse reflection effects. When Al 2 O 3 /PC mass ratio is beneath 0.2, the composited films possess excellent transparency comparable with pure PC film. The diffuse reflection performance of PC composite films is gradually enhanced with the increase of Al 2 O 3 content. When Al 2 O 3 /PC ratio attains 0.1, the visible light reflectance amounts 15%, which can even exceed 30% with the ratio reaches 0.5. The composite films show improved resistance to UV irradiation as the visible light reflectance and transparency are comparable to un-radiated samples. The hydrophobicity of composite films with a certain Al 2 O 3 amount increases, which brings forth good anti-moisture property for these transparent projection screen films.
研究领域:
材料科学
·
光学材料
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 139
·期 15
·51932
·
IF 3.125
Hao Liu,Dongcheng Sun
A supramolecular waterborne polyurethane (SWPU) with excellent mechanical and self-healing properties simultaneously is reported in this work. Herein, the SWPU were synthesized by using 2,4-diamino-6-undecyl-1,3,5-triazine react with isophorone diisocyanate to introduce ureidotriazine (UTr) structures into the main chain of polyurethane that can self-assemble to form quadruple hydrogen bonds systems. A higher dimerization constant obtained through introducing two intramolecular hexatomic ring hydrogen bonds into the UTr structure, and the hydrophobicity, plasticity brought by the undecyl group on the triazine ring are beneficial to make a great balance between the binding strength for mechanical performance and the chain reversibility, mobility for self-healing. Owing to the accuracy design, the SWPU exhibits high tensile stress (33.85 MPa) and excellent self-healing ability (90.52%), which shows an enormous application potential in the field of functional coatings and adhesives.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 138
·期 4
·49748
·
IF 2.52
Qian Zhang,Guokang Chen,Kun Wu,Jun Shi,Liyan Liang,Mangeng Lu
The booming of modern electronic devices featuring increasing power and multi-functionalization demands novel high thermal conductive materials with various functions, such as self-healing property and high deformability, while traditional polymer-based or metallic-based materials could hardly provide. Therefore, we report a high thermal conductive and disulfide-based self-healable and reprocessible liquid crystalline elastomer (SHLCE) composite by incorporating graphene nanoplates (GNPs) fillers. The obtained GNPs/SHLCE composites exhibited desired thermal conductivity (5.08 Wm −1 K −1 ) when the content of GNPs was 20 wt% to the composites. Moreover, the GNPs/SHLCE composites showed intriguing recycled performance (Tensile strength after recycle could maintain over 93% compared with that of original composites). Furthermore, we concluded that the improved thermal conductivity of GNPs/SHLCE composites was beneficial to the thermal induced reprocessible and shelf-healable systems.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 10
·e53601
·
IF 3
Zengwei Qin,Xiaohui He,Jiang Xu,Jiahao Deng,Xiujing Zang,Guoxiao Yang,Yao Lu,Shaoyu Zou,Liang Huang,Defu Chen
Solid polymer electrolytes (SPEs) have received extensive attention in the realm of lithium-ion batteries due to their safety performance, higher specific capacity and structural designability. In recent years, poly ionic liquids (PILs) have been attracting the attention of many researchers because of their high ionic conductivity, wide electrochemical stability window, high thermal stability and less-flammability in comparison with common liquid electrolytes. We selected imidazole cations as functional groups to be attached to the side chain of the polymer to prepare bis-imidazole functionalized benzo-norbornadiene monomer, which copolymerized with epoxy-functionalized norbornene monomer and norbornene (NB) monomer to obtain triblock copolymer. The prepared triblock copolymer was blended with lithium salt (LiTFSI) to obtain a solid polymer electrolyte membrane (SPEM). SPEM achieved an excellent ionic conductivity of 3.1 × 10 −5 S cm −1 at 30°C, exhibited an electrochemical stability window of up to 4.3 V versus Li/Li + (25°C) and thermal stability up to 275°C under protective (N 2 ) atmosphere. The NCM811/SPEM/Li batteries have exhibited a first discharging capacity of 149.1 mAh g −1 at 0.1 C-rate and the discharge capacity kept 141.6 mAh g −1 at 0.2 C-rate after 50 charge and discharge cycles at 30°C.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）