POLYMER COMPOSITES
·
2025
·
IF 4.7
Shuoli Peng,Liyun Guo,Feiyang Geng,Yudong Liu,Jinhui Liu,Jing Hua
L-cysteine, a bio-based modifier with multiple functional groups (thiol, amino, and carboxyl), holds promise for polymer modification. However, its tendency to agglomerate and poor solubility in nonpolar polymers limits its effectiveness. In this study, 1,2-polybutadiene (1,2-PB) was intercalated within MXene layers to enhance L-cysteine dispersibility. The intercalation allowed nanoscale distribution of 1,2-PB within MXene sheets, while interactions between MXene's hydroxyl groups and L-cysteine's polar groups promoted uniform dispersion in the rubber matrix. Compared with physical blending, the grafting degree of L-cysteine is higher, thereby more effectively restricting the movement of molecular chains, which leads to an increase in the effective damping temperature by over 7°C. Additionally, due to the ionic interactions between the functional groups, the resulting composite exhibits favorable dielectric performance, with the dielectric constant increasing from 2.5 to 3.2. Experimental results demonstrate that the synergistic effect between MXene and L-cysteine improves both the damping and dielectric properties of the resulting composites. This study presents a novel approach using two-dimensional nanosheets and bio-based thiols for modifying polybutadiene, offering a potential path for high-performance functional materials. Highlights In-situ polymerization enhances MXene distribution in the matrix. Grafting degree of L-cysteine increases with MXene incorporation. Well-dispersed MXene reduces L-cysteine aggregation, enhancing mechanical strength. Effective damping temperature rises by over 7°C with MXene and L-cysteine. Dielectric constant of composites increases from 2.5 to 3.2.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Long Han,Mengmeng Xu,Hairui Wang,Hongyu Zhang,Jing Hua,Chengzhong Zong
The loading of antioxidants onto inorganic fillers is a vital method for preventing the migration of rubber antioxidants. However, the loading rate is not ideal, which has been a persistent problem for scholars in this field. In this work, the mussel-based strategy was used to coat titanium carbide (Ti 3 C 2 ) surfaces with polydopamine (PDA). The amino group on the antioxidant 4-aminodiphenylamine (RT) is opened with the epoxy group on the silane coupling agent KH560, while the phenol hydroxyl group of PDA condenses with the silanol group on KH560 to prepare titanium carbide-supported antioxidant molecules (Ti 3 C 2 -RT). The layered Ti 3 C 2 dispersed in the matrix material not only effectively prevents oxygen from entering, but also provides a large specific surface area for the supported antioxidant. At the same time, the introduction of high-functionality polyamines and silane coupling agents creates conditions for the preparation of inorganic fillers with high loading rates of antioxidants. The loading rate of Ti 3 C 2 -RT was evaluated by TGA, and the mass fraction of antioxidant RT on Ti 3 C 2 -RT was approximately 16.5%, which means that it has the highest loading rate in the field of inorganic fillers loaded with antioxidants. In addition, the mechanical properties of polybutadiene rubber before and after aging were also studied. The test results show that the new antioxidant Ti 3 C 2 -RT has good anti-aging effect and can effectively prevent antioxidant precipitation. Therefore, compared to organic antioxidants, the supported antioxidant Ti 3 C 2 -RT has a longer ability to scavenge free radicals, resulting in a longer service life of rubber products.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
Catalysis Science & Technology
·
2024
·
IF 4.4
Lijin Gan,Zekun Liu,Lei Feng,Yi Duan,Guangyuan Xu,Si Chen,Huan Yan
Adipic aldehyde, a precursor for polymers, has significant industrial applications, where the hydroformylation of 1,3-butadiene is a promising route to fabricate adipic aldehyde. However, the heterogeneous hydroformylation of 1,3-butadiene has been rarely reported. In this work, we reported ligand-modified Rh-supported single-atom catalysts and investigated them for efficient hydroformylation of 1,3-butadiene. Among the selected phosphine ligand candidates, the L11 ligand (NiXantphos) coordinated Rh atoms could achieve the highest selectivity to adipic aldehyde. Furthermore, in situ CO DRIFTS indicated that active species similar to homogeneous catalysts were formed on the surface of the ligand modified and supported Rh catalyst during the reaction, demonstrating the similar hydroformylation mechanism and origins of the various products.
研究领域:
催化化学
·
工业化学
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材料科学
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产品关联
DOI
高影响因子
AICHE JOURNAL
·
2020
·Vol. 67
·期 4
·e17114
·
IF 3.519
Ihtisham Ul Haq,Tao Wang,Ao-Shuai Zhang,Heng Mao,Rehan Khan,Li-Hao Xu,Zhi-Ping Zhao
1,3-Butadiene (BD) is a petrochemical-based volatile organic compound, extensively used for the manufacture of synthetic rubber. There is no method reported for its recovery from nitrogen mixture. Herein, for the first time, BD is efficiently recovered by gas separation through facile and novel mixed-metal ZIF-8 based mixed matrix membranes (MMMs). Addition of Ni-ZIF-8 nanoparticles in PDMS matrix, significantly improved the penetrant-membrane interactions and the solution-diffusion properties of BD. Positron annihilation lifetime spectroscopy analysis showed that the well dispersion of Ni-ZIF-8 in PDMS enhanced the free volume of membrane and created efficient continuous paths for BD diffusion. Then, 15 wt% Ni-ZIF-8 MMM exhibited the BD permeance of 323 GPU and the BD/N 2 ideal selectivity of 19.5, which were 60 and 81% higher than pure PDMS membrane, respectively. The simultaneous enhancement of BD permeance and BD/N 2 ideal selectivity indicated that Ni-ZIF-8 was an effective filler applied in MMMs for efficient BD recovery.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 12
·7140-7149
·
IF 3.108
Yuchao Xu,Zongzhang Liu,Zheng Han,Minhua Zhang
ZnO promoted ZrO2–SiO2 catalysts synthesized by a sol–gel method were investigated in the two-step ethanol transforming to 1,3-butadiene process. The influence of promoters and the preparation method of the catalysts on the catalytic performance were studied in detail and the reaction conditions were optimized. The as-prepared catalysts were characterized by BET, X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), Fourier Transform Infrared Resonance (FT-IR), X-ray photoelectron spectroscopy (XPS), FT-IR spectroscopy of adsorbed pyridine (Py-IR) and temperature-programmed desorption of NH3 (NH3-TPD). ZnO added ZrO2–SiO2 catalysts show the best catalytic activity and the catalysts prepared by the hybrid sol–gel method were superior to those prepared by the sol–gel coupled with impregnation method. The addition of promoters in the ZrO2–SiO2 system decreased the total acidity and lowered the selectivity to dehydration products. The best performance with ethanol/acetaldehyde conversion of 40.7% and 1,3-butadiene selectivity of 83.3% was reached at 310 °C, ethanol/acetaldehyde mole ratio of 3.5 and WHSV of 1.4 h−1 using a 0.5 wt% ZnO doped ZrO2–SiO2 catalyst.
研究领域:
催化化学
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材料科学
·
能源化工
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Ihtisham Ul Haq,Shen Hui Li,Hong-Gang Zhen,Rehan Khan,Ao-Shuai Zhang,Zhi-Ping Zhao
For separating 1, 3-butadiene (BD) from BD/N 2 mixture, among numerous studied metal–organic frameworks-based adsorbents, Ni-ZIF-8 was comparatively selected here based on intelligent gravimetric analysis, simulation studies, facile synthesis, and very good IAST selectivity. Experimental results showed good butadiene uptake capacity of Ni-ZIF-8 of 7.41 mol/kg, which is 42% higher than pure ZIF-8. Additionally, Ni-ZIF-8 exhibits IAST selectivities of 2826 and 3302 at 0.1 bar, at 25 and 45 °C respectively, for 20% BD/N 2 adsorption. The molecular simulation results showed that Ni-ZIF-8 has binding energies of 65.25, 9.54 kJ/mol, while ZIF-8 has 56.07, 15.03 kJ/mol for butadiene, and nitrogen, respectively. This strongly supported the experimental results. To the best of our knowledge, Ni-ZIF-8 showed the best working capacity of 5.91 mol/kg for butadiene among all the reported adsorbents. Moreover, dynamic adsorption experiments revealed that butadiene could be recovered from BD/N 2 mixtures at room temperature, suggesting great potential for industrial BD/N 2 separation.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2018
·Vol. 136
·期 1
·46906
·
IF 1.901
Jinhui Liu,Jieting Geng,Kai Liu,Lingli Zou,Zhaobo Wang,Jing Hua
Molybdenum-based random 1,2-polybutadiene (1,2-PB) rubber, with its excellent wet skid resistance, low rolling resistance, and low heat buildup, can be used for green tread rubber, and it has significant benefits for the enhancement of the mechanical strength of 1,2-PB. In this study, we investigated in detail the effects of the electronegativity and steric hindrance of the cocatalyst on the stereoselectivity of the resulting polymers. In the case of cocatalysts with moderate electronegativities, the active centers were more stable; this resulted in a larger molecular weight and a higher conversion, whereas a cocatalyst with excessive electronegativity tended to initiate cationic polymerization. The high sterically hindered substituent restricted the coordination configuration of the monomer; this ultimately resulted in the increase in the 1,2 structure to 90%. Fourier transform infrared analysis showed that the content of trans -1,4 structure increased from 7 to 66%, and its crystallinity reached 59.2%, as calculated with differential scanning calorimetry when triethyl aluminum was used as the cocatalyst. Consequently, trans -1,4-polybutadiene crystals were introduced into the 1,2-PB elastomer in one step; this could be a promising facile route for strengthening 1,2-PB. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 46906.
研究领域:
高分子化学
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材料科学
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产品关联
DOI
高影响因子
CATALYSIS SURVEYS FROM ASIA
·
2023
·Vol. 27
·期 3
·207-216
·
IF 3
Li Shuying,Huang Bin,Jin Changzi,Wang Rui,Jiang Heng,Yang Guang-Sheng,Huang Shengjun
The conversion of ethanol and acetaldehyde to 1,3-butadiene has been an emerging process to produce key chemicals. The preparation of highly efficient catalysts and the understanding of reaction mechanism are current research priority. Herein, mesoporous silica framework confining zirconia (Zr-HMS) was prepared and act as catalyst for 1,3-butadiene production from ethanol and acetaldehyde. The prepared catalysts were characterized by Low-angle X-ray powder diffraction, transmission electron microscopy, N 2 physical adsorption-desorption, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy and UV–vis spectra. It has been shown that the Zr-HMS exhibits similar textural properties to supported catalyst (ZrO 2 /HMS). However, regardless of their comparable activities, higher 1,3-butadiene selectivity is obtained over Zr–HMS, which can be due to the different active zirconia species in two catalysts. Mesoporous framework confining character of Zr-HMS can achieve uniformly dispersed zirconia species. Further investigation toward the reaction process has presented new viewpoints for formation and consumption of some typical intermediates and byproducts, which will help to understand the reaction mechanism and construct efficient catalysts for conversion of ethanol and acetaldehyde to 1,3-butadiene.
研究领域:
化学工程
·
催化科学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2025
·Vol. 26
·期 7
·3410
·
IF 4.9
Xue Luo,Mengyan Li,Guliang Fu,Rentong Yu,Jianhe Liao
Natural rubber (NR) has long been plagued by inferior oil resistance and poor thermal degradation at high temperatures. Despite these limitations, NR remains the most widely used elastomer to date. Fluorine-containing compounds have demonstrated excellent oil resistance and thermal stability. However, they generally exhibit poor compatibility with non-polar polymers. After blending, macroscopic phase separation cannot be easily suppressed, leading to the deterioration of the material’s properties. In this study, fluorination modification was performed using hydroxyl-terminated polybutadiene, and the resulting fluorine-modified polybutadiene (3F-PBu-3F) was incorporated into natural rubber. Following sulfur curing, homogeneous phase morphologies were observed in all vulcanizates, which significantly differed from those of previously reported NR/polybutadiene vulcanizates. Additionally, the oil resistance and thermal stability of the NR/3F-PBu-3F vulcanizates were effectively enhanced.
研究领域:
材料科学
·
高分子化学
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产品关联
DOI
PubMed
高影响因子
Catalysis Science & Technology
·
2022
·Vol. 12
·期 8
·2519-2530
·
IF 6.177
Lixue Qi,Jiajun Dai,Yichen Liao,Jian Tian,Daohua Sun
The low olefin selectivity of Pd-based catalysts is a long-term challenge for the selective hydrogenation of 1,3-butadiene. Hybrid Pd/metal–organic framework (MOF) catalysts may help tackle this problem as they can stabilize Pd nanoparticles and regulate their electronic property. Herein, both surface-supported Pd/ZIF-67 and encapsulated Pd@ZIF-67 catalysts were prepared to explore the synergy between Pd and ZIF-67 and the structure–performance relationship of the catalysts. SEM and TEM reveal the different spatial positions of Pd on the two catalysts. Interestingly, encapsulated Pd@ZIF-67 shows excellent catalytic performance in the 40 h test, with a conversion of 100% and a butene selectivity of 98%, outperforming the surface-supported Pd/ZIF-67 catalyst. XPS, CO-IR and DFT calculations indicate that the encapsulated structure promotes the synergistic interaction between the ZIF-67 and Pd sites. Furthermore, in situ DRIFTS of 1-butene reveals that the enhanced synergistic interaction weakens the adsorption of 1-butene on the catalyst surface while inhibiting its isomerization and further hydrogenation. The presented strategy together with the mechanistic results clarify the relationship between the structure and the synergistic interaction and provide a promising approach for the application of synergistic interactions in hydrogenation catalysts.
研究领域:
催化化学
·
材料科学
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Liqian Zhu,Liang Zhu,Jijiang Hu,Zhen Yao,Zhiyang Bu,Suyun Jie,Bo-Geng Li
Polyurea elastomers with excellent mechanical properties are widely used in a variety of applications due to the unique microphase separation structure and high flexibility in formulations. A key point in the development of polyurea elastomers is to explore the structure–property relationship. However, few studies have focused on the effect of soft segment structures because of the limitation that the flexible soft segments are usually commercialized amine-terminated polyether. Herein, a series of polybutadiene-based polyurea elastomers were prepared to systematically investigate the influence of the network structures on the ultimate properties of the polyurea materials. In particular, the amine-terminated liquid polybutadiene rubber with tunable molecular weights and liquid polystyrene–butadiene rubber were synthesized via the degradation method for flexible regulation of the soft segment structure. The results demonstrated that performance optimization could be achieved by manipulating the degree of hydrogen bonding, which was controlled by the network structure. Besides, the polybutadiene-based polyurea elastomers exhibited excellent low-temperature properties, owing to the high cis-1,4 content.
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
MACROMOLECULES
·
2024
·
IF 5.1
Jiading Wang,Shaoyun Guo,Xianlong Zhang
High-energy radiation could accelerate the deterioration of polymer properties, greatly increase the risk of equipment failure, and reduce the polymer’s service life. Inhibition of macromolecular chemical changes in polymers is the core design concept for conventional radiation resistance. Herein, we report a novel strategy that turns the radiation reaction into a repair effect for the self-reconnection of broken chains, thereby improving the radiation resistance of polyurethane (PU) concretely; the polybutadiene (PB) segments are evenly introduced into the PU with poly(propylene glycol) (PG) to prepare the PU containing PB and PG segments (PBG-PU). During irradiation, the radical addition coupling reactions of PB segments in PBG-PU allow the broken molecular chain of PBG-PU to be reconnected, thus continually repairing the radiation damage on PBG-PU. Therefore, the PBG-PU elastomers still maintain about 70% strength with minimal alterations in creep properties and recovery rates after 300 KGy radiation, while the ordinary PU elastomers have completely lost their original properties. The combination of the self-reconnection strategy and the modification method of the hard segment can even boost radiation resistance of PU to more than three times, showing excellent radiation stability. The self-reconnection strategy can also be used to increase the stability of the ultrastructure in material during high-dose gamma ray irradiation, showing great adjustability. This novel strategy demonstrates enormous potential in achieving the long-term application of polymers in nuclear industry, space mission, and radiation medicine fields.
研究领域:
材料科学
·
辐射生物学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）