LANGMUIR
·
2025
·
IF 3.9
Minqiang Xia,Yulu Ye,Tuo Li,Yunbo Li
Gold nanoparticles (AuNPs) have outstanding catalytic properties, whereas their broader application is hindered by limited charge transport and stability. In this work, we present a simple and rapid synthesis method for immobilizing AuNPs onto filters using polythiourea, aimed at facilitating charge transport and enhancing the catalytic conversion of 2-nitrophenol in aqueous solutions. The results show an obvious enhancement in the catalytic performance of the AuNPs when immobilized onto the filter paper with polythiourea, reducing the complete conversion time from 14 min to 150 s. The optimal addition amount of polythiourea is 5.0 mL. Additionally, the kinetics and recyclability of the system were investigated; it was observed that even after 15 cycles of testing, the catalytic complete conversion time of the AuNPs immobilized on the filter with polythiourea maintained consistently at 150 s. These findings suggest a promising strategy for extending the functional lifespan of AuNPs while offering a platform for catalytic reactions.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Wu Bin Ying,Haixiong Liu,Peiyuan Gao,Zhengyang Kong,Han Hu,Kai Wang,Ang Shen,Zhijin Jin,Lin Zheng,Hongxia Guo,Ruoyu Zhang,Jin Zhu
Considering the complicated environment in daily use of stretchable devices, the capabilities of anti-stress relaxation, anti-fatigue, anti-fungal and self-healing are very much appreciated, and the above four functionalities largely depend on the elastic matrix. Here, these demands are fulfilled by a poly(thiourethane-urethane) elastomer CBPU-3. In detail, a large amount of cyclohexane rings, with completely reversible boat–chair conformational transition, are introduced into the backbone of poly(thiourethane-urethane), and such non-planar ring imparts molecular elasticity and modulus into the elastomer, resulting in remarkable anti-stress relaxation and anti-fatigue abilities. Even after 20 h fixation at 300% strain and 1000 times cyclic tensile (50% strain), the recovery ratio could still be higher than 98%, and its stable microstructure is proved by SAXS scattering patterns. In addition, the thioether bond ensures the effective mildew proof ability, and the mechanical properties and transmittance change little even after a severe mildew pollution for 30 days. Simultaneously, the relatively lower bond energy of C-S (62.0 Kcal/mol) in thiourethane bonds endowes the poly(thiourethane-urethane) with self-healing capability (highest: 40 μm/min at 80 °C). Finally, the durability and usability of the deformable resistive sensor array based on this elastomer as the matrix are drastically enhanced due to the above integrated functionalities.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
MACROMOLECULAR RESEARCH
·
2023
·Vol. 31
·期 6
·603-613
·
IF 2.4
Gu Jianbo,Wang Xiang,Xu Chengze,Feng Xiangyang,Zhang Siyuan
In recent years, high refractive index polythiourethane materials have attracted increasing attention. In this study, the soft segment part of conventional polyurethane was replaced by ethylenedithiol, and a series of nanocomposite films containing Mercaptoethanol (ME) capped ZnS NPs were prepared by UV curing after the synthesis of the bifunctional linear prepolymer with hydroxyethyl acrylate as capping agent and trifunctional prepolymer with trimethylolpropane triacrylate as sulfhydrylate capping. ZnS NPs were well dispersed in the resin system, and the transmittance of the film decreased with the increase of ZnS content, but it did not float much and still has 80% transmittance at 40%. The addition of ZnS had a significant improvement on the refractive index. The RI of the system without the addition of particles was less than 1.5, the system with 40% was greater than 1.6. It was worth noting that the Abbe number was almost greater than 30, which was in the category of low dispersion.
Graphical abstract
Preparation of highly refractive polythiourethane-ZnS composite film by “click” chemical reaction
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Energetic Materials Frontiers
·
2023
·
IF 0
Shao-cong Deng,Ya-jun Luo,Yan-zhou Qu,Xin-ru Yang,Zhi-jian Yang,Xu Zhao,Yi-ding Liu,Fu-de Nie
To improve the mechanical properties of 2,4,6-trinitrobenzene-1,3,5-triamine (TATB)-based polymer bonded explosives (PBXs), four kinds of polythiourea binders, namely the polyetherthiourea (P1), aliphatic polythiourea (P2), aromatic polythiourea (P3) and silane polythiourea (P4), were prepared and used in the PBXs. These four polythioureas were synthesized via the copolymerization of carbon disulfide (CS 2 ) and diamines with various structures under mild conditions. They were then characterized using nuclear magnetic resonance (NMR) and Fourier-transform infrared spectroscopy (FTIR). The interfacial binding energy between polythioureas and TATB was calculated via molecular dynamics simulations. The tensile and compression mechanical properties of various PBXs (PBX-P n , n = 1–4) were studied through Brazilian and compression tests and were then compared with those of the PBX with a conventional fluoro polymer binder (PBX-FP). The results show that the PBX-P1 possessed the strongest interfacial interaction energy and the best mechanical properties among all the prepared PBXs. Its Brazilian strength and strain was 11.0 MPa and 0.56%, which was 89% and 256% higher than those of the PBX-FP with the same binder proportion, respectively. Furthermore, PBX-P1 showed excellent compression mechanical properties, with a compression strength of 40.7 MPa and a compression strain of 3.53%. Moreover, its Brazilian and compression fracture energy was 600% and 101% higher than those of PBX-FP, respectively, which was beneficial for improving the PBX stability. The results of this study provide a new idea for designing TATB-based PBX with improved mechanical properties using polyetherthiourea binders.
研究领域:
材料科学
·
爆炸物工程
·
高分子化学
✓ 已验证
DOI
MACROMOLECULES
·
2020
·
IF 5.918
Cheng-Jie Fan,Zhi-Bin Wen,Zhi-Yuan Xu,Yi Xiao,Di Wu,Ke-Ke Yang,Yu-Zhong Wang
Currently, a variety of elastomers with a self-healing capacity and reprocessability have been developed by dynamic chemistry to extend the service life, increase the reliability of polymeric materials, and reduce the waste. However, it is still a large challenge to seek an appropriate dynamic interaction that may perfectly match the general performance of the target polymeric materials such as polyurethane. Herein, we report a poly(thiourethane-urethane) (PTUU–Nx) elastomer containing dynamic thiourethane bonds prepared via a thiol–isocyanate click reaction, which is stable at room temperature, healable at moderate temperature, and reprocessable at high temperature. Importantly, it exhibits a mechanical strength similar to the polyurethane because of a very similar structure. The dynamic feature of PTUU–Nx is demonstrated theoretically and experimentally to originate from the exchange of thiourethane bonds via the reversible generation of isocyanates and thiols. Most importantly, the thiourethane bond possesses a much lower bond dissociation energy than the urethane bond, which not only makes PTUU–Nx elastomers easier to be reprocessed but also endows them with a desirable self-healing ability under moderate conditions. In addition, the optimized sample PTUU–N2 is utilized to fabricate a conductive device by coating Ag glue on the elastomer surface and inserting the coated elastomer into a circuit, which displays a high self-healing efficiency, as the material recovers to its original mechanical property and conductivity. Therefore, these results not only indicate that the PTUU–Nx elastomers have considerable potential for applications in intelligent electronic devices but also provide new ideas for developing new self-healing materials by applying the adaptable dynamic bond to the target polymers.
研究领域:
材料科学
·
高分子化学
·
智能材料
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·
IF 5.7
Yonghao Zhang,Yan Guo,Yang Liu,Zhongqi Shi,Wenfeng Liu,Jinzhan Su,Guohua Chen,Di Zhou
All-organic dielectric materials require high performance in applications such as transportation, microelectronics, and aerospace power systems. In this work, aromatic polythiourea (ArPTU) was synthesized via a one-step method. A series of polymer composite films were prepared using ArPTU and polyetherimide (PEI) as raw materials. The experimental results showed that the composite films have better dielectric properties than the pure PEI films. Taking the blend membrane with an ArPTU mass fraction of 2% as an example, the composite films have good dielectric properties (εr = 3.58, tan δ = 0.007), high energy density (5.34 J cm−3 at an Eb = 580 MV m−1), and a charge–discharge efficiency of 85% at 150 °C. At 25 °C, the maximum Ue was 5.75 J cm−3, and the efficiency could be maintained above 97%. It was speculated that the strong polarity of ArPTU and good compatibility with PEI were the reasons for its performance improvement. The ArPTU/PEI composite films demonstrated excellent comprehensive performances, combining the advantages of both ArPTU and PEI and have potential in a wide range of applications in the field of high-temperature media.
研究领域:
材料科学
·
电气工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 44
·30398-30408
·
IF 10.7
Ning Ding,Yi Yang,Wei Zhou,Debora Puglia,Pengwu Xu,Deyu Niu,Weijun Yang,Piming Ma
A common approach for developing thermosetting polymers with self-healing performance is to introduce covalent adaptive networks into crosslinked systems. However, most self-healing polymers were conducted in “integral big materials”, which means “high energy consumption” and hard to carry out especially for those products with complex structures. In this work, thermosetting polythiourethane (PTU) dynamic networks with remote ultrafast infrared “welding” performance were designed. At first, biobased PTUs were synthesized by tailoring the crosslinking networks, which contain dynamic thiocarbamate bonds. Then, MXene, used for photothermal stimulation, was incorporated into the crosslinked PTU networks. The tensile strength and modulus of PTU ranged from 23.7 to 64.0 MPa and 17.4 MPa to 1.95 GPa, respectively, while the Tg could be tuned up to 83.4 °C. Moreover, due to the excellent photothermal conversion behavior of MXene and the reversibility of the dynamic thiocarbamate bonds, the PTU/MXene nanocomposites showed interesting remote and ultrafast infrared “welding” performance via the precise photothermal self-healing of the physical damage within 120 s. Meanwhile, the crosslinked PTU showed excellent intrinsic flame-retardant properties. This study may provide a novel strategy to facilitate the self-healing process for thermosetting polymers.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2020
·
IF 4.469
Songbo Xie,Jing Wang,Lida Wang,Wen Sun,Zhaoxia Lu,Guichang Liu,Baorong Hou
The development of environmentally friendly alternatives is a crucial issue, since the prohibition of tributyltin (TBT)-based antifouling coatings. In this work, a series of fluorinated diols modified polythiourethane (HO-FPTU-x) have been synthesized via a simple and convenient polymerization reaction with HDI, PETMP and various of 2,3,5,6-tetrafluoro-1,4-benzenedimethanol (HOCH 2 -FB-Al) at the room temperature, and their antifouling properties are explored as well. The laboratory assays and marine field tests (6 months) show that the HO-FPTU-7.5 (with 7.5 wt% HOCH 2 -FB-Al) coating has shown excellent antifouling/fouling release properties. The side chains of the HO-FPTU polymers simultaneously contain hydrophobic and hydrophilic groups, which construct an “ambiguous’’ surface after immersing into water. The marine organisms may be “confused’’ by the “ambiguous’’ surface and be removed easily during settlement and adhesion. This work provides a facile strategy for designing environment friendly marine antifouling coatings.
研究领域:
材料科学
·
海洋生物学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 138
·期 39
·50997
·
IF 3.125
Aftab Ahmad,Hui Tong,Tao Fan,Ju Xu
Flexible high-temperature polymeric dielectrics with advanced dielectric properties are urgently demanded in various applications. In this work, series of polymer blend films were prepared from aromatic polythiourea (ArPTU) and polyimide (PI). The experimental results revealed that the blend films were properly engineered to achieve higher breakdown strength, greater dielectric constant, and larger energy density than pure PI film. For instance, the optimum property was obtained from the blend film with 10 wt% ArPTU, exhibiting prominent dielectric properties ( K = 4.52, E b = 443 MV/m), enhanced energy density (4.00 J/cm 3 ) as well as excellent heat resistance ( T g = 419°C). In addition, stable dielectric properties at broad temperature range from −50 to 250°C were also acquired. It is deduced that the good compatibility from ArPTU and PI with similar polarity are responsible for the improved properties. The superior comprehensive properties which combine the advantages of ArPTU and PI suggest the potential applications of ArPTU/PI blend film in high-temperature dielectric areas.
研究领域:
材料科学
·
电气工程
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2022
·Vol. 13
·期 1
·1-10
·
IF 17.694
Li Yan Mei,Zhang Ze Ping,Rong Min Zhi,Zhang Ming Qiu
To impart self-healing polymers largely adjustable dynamicity and mechanical performance, here we develop libraries of catalyst-free reversible polythioureas directly from commodity 1,4-phenylene diisothiocyanate and amines via facile click chemistry based modular assembly. By using the amine modules with various steric hindrances and flexibilities, the reversible thiourea units acquire triggering temperatures from room temperature to 120 °C. Accordingly, the derived self-healable, recyclable and controlled degradable dynamically crosslinked polythioureas can take effect within wide temperature range. Moreover, mechanical properties of the materials can be tuned covering plastics, elastomers and fibers using (i) different assemble modules or (ii) solid-state stretching. Particularly, unidirectional stretching leads to the record-high tensile strength of 266 MPa, while bidirectional stretching provides the materials with biaxial strengths up to over 120 MPa. The molecular mechanism and technological innovations discussed in this work may benefit promotion and application of self-healing polymers towards greatly diverse demands and scenarios.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2023
·Vol. 41
·期 10
·1563-1576
·
IF 4.3
Zhang Jie,Ye Fan,Huo Jin-Lei,Peng Jian-Wen,Hu Rong-Rong,Tang Ben Zhong
Multicomponent polymerizations (MCPs) are powerful tools to synthesize functional polymers with great structural diversity, low cost and high efficiency, which usually generate single polymer product. Herein, a robust one-pot diamines, CS 2 and monoisocyanide-participated catalyst-free polymerization was developed at room temperature to produce polythiourea and thioformamide simultaneously in equal equivalent, which was featured with cheap monomers, simple operation and mild condition, affording various polythioureas with high M w s of up to 47500 g/mol in high yields of up to 98%. Polythioureas with varied chain composition and sequence-controlled structure could be synthesized in 62 g-scale from copolymerization or multicomponent tandem polymerization, enabling facile tuning of thermal property, crystallinity, mechanical property, and fluorescence. The abundant irregular hydrogen bonds endowed the polythioureas excellent glassy state self-healing property at room temperature or below 0 °C. This polymerization provided an efficient and economic approach to access functional polythioureas.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2023
·Vol. 16
·期 11
·4040
·
IF 3.4
Yu Zeng,Jiale Song,Jinfu Li,Chi Yuan
In this study, poly(thiourethane) (PTU) with different structures is synthesized by click chemistry from trimethylolpropane tris(3-mercaptopropionate) (S3) and different diisocyanates (hexamethylene diisocyanate, HDI, isophorone diisocyanate, IPDI and toluene diisocyanate, TDI). Quantitative analysis of the FTIR spectra reveals that the reaction rates between TDI and S3 are the most rapid, resulting from the combined influence of conjugation and spatial site hindrance. Moreover, the homogeneous cross-linked network of the synthesized PTUs facilitates better manageability of the shape memory effect. All three PTUs exhibit excellent shape memory properties (Rrand Rfare over 90%), and an increase in chain rigidity is observed to negatively impact the shape recovery rate and fix rate. Moreover, all three PTUs exhibit satisfactory reprocessability performance, and an increase in chain rigidity is accompanied by a greater decrease in shape memory and a smaller decrease in mechanical performance for recycled PTUs. Contact angle (<90°) and in vitro degradation results (13%/month for HDI-based PTU, 7.5%/month for IPDI-based PTU, and 8.5%/month for TDI-based PTU) indicate that PTUs can be used as long-term or medium-term biodegradable materials. The synthesized PTUs have a high potential for applications in smart response scenarios requiring specific glass transition temperatures, such as artificial muscles, soft robots, and sensors.
研究领域:
材料科学
·
生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）