Polymers
·
2024
·Vol. 16
·期 16
·2234
·
IF 4.7
Haixiang Jia,Xiaohe Miao,Zhiyi Zhang
With the rapid development of the transport industry, there is a higher demand for environmental friendliness, durability, and stability of tires. Rubber composites with excellent mechanical properties, abrasion resistance, and low heat generation are very important for the preparation of green tires. In this study, the all-aqueous phase process was initially employed to prepare 2-Amino-5-mercapto-1,3,4-thiadiazole (AZT) functionalized graphene oxide (AGO). Subsequently, modified graphene oxide/silica/natural rubber (AGO/SiO2/NR) composites were obtained through latex blending and hot press vulcanization processes. This method was environmentally friendly and exhibited high modification efficiency. Benefiting from the good dispersion of AGO in the latex and the cross-linking reaction between AGO and NR, AGO/SiO2/NR composites with good dispersion and enhanced interfacial interaction were finally obtained. AGO/SiO2/NR composites showed significantly improved overall performance. Compared to GO/SiO2/NR composites, the tensile strength (28.1 MPa) and tear strength (75.3 N/mm) of the AGO/SiO2/NR composites were significantly increased, while the heat build-up value (10.4 °C) and DIN abrasion volume (74.9 mm3) were significantly reduced. In addition, the steady-state temperature field distribution inside the tire was visualized by ANSYS finite element simulation. The maximum temperature of the prepared AGO/SiO2/NR was reduced by 18.2% compared to that of the GO/SiO2/NR tires. This strategy is expected to provide a new approach for the development of low energy consumption, environmentally friendly, and long-life rubber for tires.
研究领域:
材料科学
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环境科学
·
交通运输工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF FOOD ENGINEERING
·
2024
·
IF 5.3
Xingbo Xiao,Kangning Sun,Jingwei Ma,Shufang Zhou,Jiayi Wang,Yanli Li,Shuo Wang,Qiliang Deng
For real-time dynamic quality evaluation of pork meat, the thermal accumulation monitoring for the entire period is essential. The research aims to develop a novel covalent organic framework (COF) gel capable of recording such information. The COF with self-responsive irreversible color change property was synthesized using benzene-1,3,5-tricarboxaldehyde, 2,5-diamino-1,4-benzenedithiol dihydrochloride and p -phthalaldehyde as monomers. The thermal accumulation was monitored based on the COF over a broad temperature range (−22 °C–55 °C), which covered the storage temperatures of the pork meat. The results were easily readable by series visible color variations (yellow, green, blue and dark blue) displayed by COF during the thermal accumulation monitoring in the temperature range (25 °C–55 °C) of study. At the lower temperature (−22 °C–4 °C), small variation of the thermal information can be effectively represented by quantitative analysis. The color change rates were in the order of k -22 °C < k 4 °C < k 25 °C < k 35 °C < k 55 °C . The activation energy of reaction was 65.31 kJ mol −1 . The indicator gel was prepared by the COF combining with carrageenan in pure aqueous medium. The potential application of the COF gel for real-time monitoring the dynamic quality change of pork samples was investigated. The response signals of the COF gel were well matched with the growth rate of microbe in pork meat. The proposed COF gel based thermal history indicator is promising for real-time monitoring dynamic quality changes of pork meat during the cold supply chain.
研究领域:
食品科学
·
材料科学
·
化学
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产品关联
DOI
高影响因子
JOURNAL OF FOOD SCIENCE AND TECHNOLOGY-MYSORE
·
2024
·
IF 2.6
Sun Kangning,Liang Xurong,Zhou Shufang,Wang Jiayi,Lu Futai,Deng Qiliang
Perishable products are easily deteriorated due to thermal accumulation during storage and transport. A low-cost, environmental-friendly and visualized indicating device is of great importance for real-time monitoring the quality state of such products, but remains a significant challenge. Herein, a novel thermal history indicator (THI) based on readily available starch was developed. The resulting THI displayed sensitively response to the environmental time-temperature over a broad temperature range (15–55 ℃). The activation energies ( E a ) according to the signals of absorbance, fluorescence emission and G’ values are 95.97 kJ/mol 105.3 kJ/mol, and 114.53 kJ/mol, respectively. The continuous appearance changes from colorless to dark brown allowed user-friendly readout. In addition, the quantitative information could also be obtained by the signal changes of absorbance, fluorescence emission, and RGB values. The resulting THI also displayed the immediate response to temperature fluctuations during transportation and storage. The signal values from multiple channels were well correlated with the concentration of aerobic mesophilic bacteria (AMB) in milk under same storage conditions. The proposed THI show the potential application for real-time assessing the quality loss of perishable products. The low-cost, environmental-friendly, commercially available starting material makes it suitable for scalable manufacturing and wide application.
研究领域:
材料科学
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化学工程
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食品科学
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生物技术
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产品关联
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2020
·Vol. 31
·期 9
·1994-2006
·
IF 2.578
Yue-Hua Zhan,Yan-Chan Wei,Hui-Feng Zhang,Ming-Chao Luo,Ting-Ting Zheng,Shuangquan Liao
This work highlights the relationship of crosslink density, entanglement points and various sulfide crosslinks with the thermogenesis properties of natural rubber (NR). The impact of cross-link and entanglement on thermogenesis properties was evaluated by heat build-up test, swelling behavior, statistical thermodynamic calculation, and classic viscoelastic theory. It was found that cross-link and entanglement points have “pinning” effect to the rubber chain, thus remarkably restricting the motion of the rubber chain and reducing thermogenesis. Besides, the effects of various sulfide crosslinks and cross-link length on thermogenesis were compared and discussed varying the sulfur vulcanization system. It was found that the semi-effective vulcanization system using N-cyclohexyl-2-benzothiazolesulfenamide (CZ) and 2-Mercaptobenzothiazole (M) has the lowest thermogenesis (bottom temperature rise is 7.5°C, middle is 18.7°C), which on account of combined short crosslink length with high rigid rubber chain (crosslink network dominated by mono- and disulfides). As a result, the deformation degree of the rubber chain during curl up-extension and the thermogenesis are further reduced. Finally, a combination of natural film coagulation and semi-effective vulcanization system was used to prepare a low thermogenesis NR, in which bottom and middle temperature rise were only 5.0°C and 14.1°C, respectively.
研究领域:
材料科学
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高分子科学
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机械工程
✓ 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）