Scientific Reports
·
2021
·Vol. 11
·期 1
·1-9
·
IF 4.38
Zou Weihua,Li Zimu,Wang Zhangheng,Sun Delin,Zhang Pingfang
The red thermochromic dye (R-TD) is the tetradecanoic acid tetradecyl ester (C 28 H 56 O 2 ) and methyl red (C 15 H 15 N 3 O 2 ) mixture that has better permeability enabling its infiltration into wood and better thermochromic properties changing its colour at above 30 °C after about 0.5 min. Thicker poplar-based thermochromic composite specimens (R-PTC, thickness: 5.0 mm) were prepared by filling the R-TD into pre-treated poplar veneer (thickness: 5.0 mm) thus allowing better penetration after pre-treatment. After R-TD infiltration, the R-PTC samples were covered by polypropylene wax for preventing R-TD from overflowing from R-PTC under the action of phase-change temperature. This R-PTC, whose colour can change from light-red to dark-red at 38 °C to 46 °C, can recover to light-red at below 38 °C after about 14 h, and the peak of colour change is at about 42 °C. R-PTC will be suitable for materials used in thermochromic furniture that can indicate the surface temperature to potential users, thus allowing assessment of likely scalded pain when used the furniture.
研究领域:
材料科学
·
木材科学
·
热敏材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF FOOD ENGINEERING
·
2023
·
IF 5.5
Beibei Ye,Cikun Liu,Huan Li,Feifei Wang,Jian Chen,Yanbo Wang
The spoilage of seafood is highly dependent on temperature changes during cold chain. To visually reflect the shelf-life of large yellow croakers (0–25 °C), the xylose-lysine based time-temperature indicator (TTI) label was designed and applicated. The ultraviolet (UV) spectrum, and color response of Maillard reaction (MR) indicated that the color changes of TTI was related to the formation of melanoidins of MR. The color changes of TTI, and the quality degradation of large yellow croakers were described by kinetics analysis, which showed that Ea of TVB-N (70.45 kJ/mol) was closer to that of TTI (83.51 kJ/mol). Under fluctuating temperatures, the difference of the effective temperature (T eff ) between TVB-N (15.95 °C) and TTI (16.84 °C) was less than 1 °C, and the relative error of shelf-life was −8.33%. Briefly, this novel TTI label as an environmentally friendly system could be attached to sample surface for real-time reflecting shelf-life of seafood in cold chain.
研究领域:
食品科学
·
生物学
✓ 已验证
产品关联
DOI
高影响因子
Food Chemistry-X
·
2024
·
IF 6.5
Lin Wang,Tianxin Yuan,Yan Zhang
A time-temperature integrator (TTI) based on laccase@Cu 3 (PO4) 2 nanoflowers (laccase@NFs) was created to monitor the freshness of pasteurized milk during storage. To address the challenges of easy inactivation, poor stability, and high use-cost of laccase in the application of TTI, laccase@NFs were synthesized by ultrasonic-assisted biomineralization. The laccase@NFs-based TTI was created through the enzymatic reaction between laccase and 2,2′-azinobis(3-ethylbenzothiazoline-6-sulfonic acid ammonium salt), and the effects of laccase@NFs addition amount on the reaction rate, discoloration lifetime and activation energy (Ea) were discussed. Furthermore, the spoilage pattern and kinetic properties of pasteurized milk were explored based on titratable acidity. The measurement of the Ea was determined as 49.98 kJ/mol, and an investigation was conducted to assess the suitability of the TTI with pasteurized milk under both constant and variable temperature conditions. This research aims to contribute valuable insights into the application of enzymatic TTI in monitoring the shelf life of pasteurized milk.
研究领域:
食品科学
·
生物技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Zide Wu,Xinyu Zhai,Ziliang Rui,Xudong Xu,Chunxiang Wang,Hao Peng
The development of pharmaceutical cold chain logistics calls for thermochromic microencapsulated phase change materials (TC-MPCMs) to fit the demand of temperature indication and low temperature (2–8 °C) cold storage . In this study, TC-MPCMs for low temperature were constructed by encapsulating crystal violet lactone (CVL), bisphenol A (BPA) and n-tetradecane & n-dodecanol (aliphatic compound) binary system into melamine-formaldehyde (MF) resin. The effects of emulsifier type, n-dodecanol content, and core/shell ratio on the performance of TC-MPCMs were investigated. Results indicate that TC-MPCMs with SMA: gelatin ratio of 2:1 exhibit the best morphology and uniform dispersion, with particle size distribution between 4.5 μm and 19.5 μm. TC-MPCMs with 25 wt% 12OH and core/shell of 1.85 demonstrate excellent property in terms of the encapsulation efficiency, melting enthalpy and color difference, which are 67.80 %, 169.90 J/g and 23.39, respectively. Synthesized TC-MPCMs present outstanding thermal durability during 100 thermal cycles and have an appreciable thermal stability at temperature not exceeding 96 °C. The vaccine refrigerator was designed which can maintain a low temperature (2–8 °C) for 12.8 min.
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
RSC Advances
·
2020
·Vol. 10
·期 18
·10402-10410
·
IF 3.119
Bei Hu,Lin Li,Yi Hu,Di Zhao,Yuting Li,Mingquan Yang,Aijuan Jia,Sui Chen,Bing Li,Xia Zhang
Dietary advanced glycation end products (AGEs) are formed via the Maillard reaction in foods, especially in reheated foods, and can cause chronic diseases. In this study, a series of Maillard reaction-based time–temperature indicators (TTIs: TTI-1, TTI-2, and TTI-3) were developed with lysine and xylose for monitoring the dynamic formation of fluorescent AGEs in reheated foods. The discoloration kinetics of Maillard reaction-based TTIs and the dynamics of fluorescent AGE formation were explored. Formulas were derived to illustrate the relationship of the color change in the TTIs with time and temperature. The activation energies (Ea values) for generating the TTIs were 96.17, 87.98, and 83.55 kJ mol−1, respectively. TTI-1 was the optimal indicator for instant soy milk powder because it showed the lowest activation energy difference in this study. The results show that this series of Maillard reaction-based TTIs can be used to monitor the AGE contents in various reheated foods.
研究领域:
食品科学
·
医学
·
生物化学
✓ 已验证
DOI
高影响因子
FOOD CHEMISTRY
·
2021
·
IF 7.514
Beibei Ye,Jian Chen,Huangwei Ye,Yuting Zhang,Qing Yang,Hejun Yu,Linglin Fu,Yanbo Wang
Due to the highly cost-effective and maneuverable property, Maillard reaction-based time–temperature indicators (TTIs) are considered ideal devices for temperature track and quality indication. The objective of this study was to develop a cold-sensitive TTI based on the Maillard reaction reflecting the freshness of chilled seafood. Firstly, the color evolution trends of a series of Maillard reaction-based TTIs were investigated and the xylose-lysine group represented obvious color change. Fourier transform infrared (FTIR) spectroscopy revealed the color change was associated with the formation of C N bond in melanoidin. Simultaneously, the relationships of the color change of TTI with time and temperature were established. The activation energy value ( Ea ) of TTI was close to that of mackerel. There existed a good relevance (R 2 = 0.98) between the color change of TTI and the total volatile basic nitrogen content of mackerel, suggesting this novel TTI might have the potential to monitor the freshness of mackerel.
研究领域:
食品科学
·
生物化学
✓ 已验证
DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Wenjie Zhu,Linping Tian,Zhiyuan Yin,Yingxuan Feng,Wenjie Xia,Huinan Wang,Qingfeng Sun,Yingying Li
With the continuous increase in global energy demand and environmental challenges, the efficient utilization and storage of energy have become critical areas of scientific research. This study presents the preparation and performance assessment of a wood-based phase change composite (TPW) with reversible thermochromic properties. Thermogravimetric analysis (TG) confirmed thermal stability across 26 °C to 270 °C, while differential scanning calorimetry (DSC) demonstrated that TPW has good thermal cycling performance, and suitable phase change temperature at about 34 °C. Thermal insulation tests showed that TPW can reduce heat exchange between inside and outside environment, maintaining the internal temperature for longer time. Below the transition temperature, the material displays a bluish-purple color, transitioning to light yellow upon heating, with a notable color difference ( ΔE *) increase from 3.46 to 67.89. Since the phase transition temperature close to human body temperature, enhances TPW’s compatibility for applications in home decor, temperature indicators, and anti-counterfeit labeling. This research contributes novel insights and foundational data for advancing wood-based functional materials in sustainable applications.
研究领域:
材料科学
·
能源技术
·
可持续发展
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Sen Wang,Lanhe Zhang,Yanping Jia,Wei Du,Jingbo Guo
Metal equipment is susceptible to corrosion and aging under high temperature condition. It is low-cost and effective thermal malfunction detection method by coating temperature-indicating paint on the metal surface. In this study, thermochromic material (TCM) was synthesized by liquid-phase synthesis method in which [CuCl 4 2− ] was used to react with Na 2 EDTA. A temperature-indicating anti-corrosive coating (TIAC) was prepared by dispersing TCM and modified graphene oxide (MGO) into the silicone resin. The microstructure, crystal plane, functional groups, and bonding changes of TCM before and after discoloration were analyzed using FE-SEM, XRD, FTIR, and XPS. Corrosion resistance of TIAC were detected using OCP, Tafel, and EIS experiments. The mechanism of color changes in TCM were studied using density functional theory (DFT) calculation. The results showed that TCM produced a reversible color change from green to yellow when the temperature increased from 80 °C to 300 °C. When the temperature exceeds 300 °C, the TCM had irreversible color change. After heating and discoloration, the C-N bond was broken and the content of COO-Cu increased. A reticular structure appeared on the surface of TCM and the crystal plane spacing reduced. DFT calculation proved that TCM had a high formation energy (E F ) below 300 °C, its structure was unstable and prone to change. When the temperature exceeded 300 °C, the E F of TCM decreased to −1.24 eV. The structure of TCM tended to stabilize and remained yellow. After immersion for 21 days, the protection efficiency ( Pi ) of TIAC for the metal reached 96.465 %, corrosion current density ( i corr ) was 6.501 × 10 −7 A cm −2 . This work combines thermochromism and corrosion resistance, and promotes the development in the design and application of multifunctional coatings.
研究领域:
材料科学
·
腐蚀与防护
·
理论计算
✓ 已验证
产品关联
DOI
高影响因子
Wood Material Science & Engineering
·
2023
·
IF 2.2
Weihua Zou,Zimu Li,Zhangheng Wang,Delin Sun
A blue thermochromic dye (B-TD) was prepared by mixing crystal violet lactone (CVL), hydroxyethyl acrylate (HEA) and myristic acid myristyl ester (MME). B-TD is a phase-changing material and can change colour at above 32°C about 5 s. The B-TD can permeate into pre-treated pinewood samples about 8–10 mm from the surface of samples after immersed pre-treated pinewood samples in B-TD for about 10 min at 70 °C. A blue thermochromic pinewood (B-TP) was prepared by filled the B-TD into pre-treated pinewood and covered polypropylene wax that can prevent B-TD overflowing from wood-based material when at phase-changing temperature. The B-TP can change colour from dark blue to light blue at 38–48°C, and can recover dark blue at below 38°C after about 5 h. B-TP can be used in a kind of pinewood woodwork that can indicate the temperature of woodwork surface to users by its colour-change phenomenon at 38–48°C, covering the lowest temperature of cryogenic burns (42°C), so this kind of pinewood woodwork can warn the temperature of cryogenic burns for avoiding cryogenic burns by its colour-change phenomenon.
研究领域:
材料科学
·
林业工程
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2023
·
IF 17.1
Chao Huang,Yuanyuan Shang,Jiachuan Hua,Yadong Yin,Xuemin Du
Vaccines are undoubtedly a powerful weapon in our fight against global pandemics, as demonstrated in the recent COVID-19 case, yet they often face significant challenges in reliable cold chain transport. Despite extensive efforts to monitor their time–temperature history, current time–temperature indicators (TTIs) suffer from limited reliability and stability, such as difficulty in avoiding human intervention, inapplicable to subzero temperatures, narrow tracking temperature ranges, or susceptibility to photobleaching. Herein, we develop a class of structural color materials that harnesses dual merits of fluidic nature and structural color, enabling thermal-triggered visible color destruction based on triggering agent-diffusion-induced irreversible disassembly of liquid colloidal photonic crystals for indicating the time–temperature history of the cold chain transport. These self-destructive structural color liquids (SCLs) exhibit inherent irreversibility, superior sensitivity, tunable self-destructive time (minutes to days), and a wide tracking temperature range (−70 to +37 °C). Such self-destructive SCLs can be conveniently packaged into flexible TTIs for monitoring the storage and exposure status of diverse vaccines via naked-eye inspection or mobile phone scanning. By overcoming the shortcomings inherent in conventional TTIs and responsive photonic crystals, these self-destructive SCLs can increase their compatibility with cold chain transport and hold promise for the development and application of the next-generation intelligent TTIs and photonic crystals.
研究领域:
材料科学
·
生物医学工程
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2022
·
IF 6.056
Lin Wang,Feng Li,Sufang Wang,Jinsong Wu,Wenhui Zhang,Yan Zhang,Wentao Liu
The application of enzyme-inorganic hybrid nanoflowers in time-temperature indicators (TTIs) was studied for the first time. Lipase@Cu 3 (PO 4 ) 2 hybrid nanoflowers were prepared by the interaction between lipase and copper ions. Compared with free lipase, the activity of lipase in the nanoflowers was increased by 137%, and the storage stability was also improved significantly. Based on the enzymatic reaction between lipase and glycerol triacetate, six TTI prototypes with different concentrations of lipase@Cu 3 (PO 4 ) 2 hybrid nanoflowers were investigated. The color of the six TTIs changed from purple to yellow, and finally to green, and the activation energies were 46.86 kJ/mol, 51.17 kJ/mol, 54.99 kJ/mol, 60.00 kJ/mol, 62.17 kJ/mol, and 65.63 kJ/mol, respectively. The shelf life of TTIs can be determined by changing the ratio of lipase@Cu 3 (PO 4 ) 2 hybrid nanoflowers to glycerol triacetate, therefore the TTIs can be easily applied to real-time safety evaluation of many perishable foods.
研究领域:
食品科学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF FOOD ENGINEERING
·
2021
·
IF 5.354
Tingting Gao,Da-Wen Sun,You Tian,Zhiwei Zhu
A time-temperature indicator (TTI) based on gold-silver core-shell nanorods (Au@Ag NRs) was developed to monitor the quality degradation of pasteurized milk in the cold chain. Changes of longitudinal plasmon peak wavelength, micro-morphology and colour of the Au@Ag NRs TTI at 4 °C, 15 °C, 25 °C, and 35 °C were investigated, and kinetic characteristics and temperature dependence of the TTI were studied. Pasteurized milk was also stored at the same temperatures, and changes of titratable acidity (TA), pH values and total bacterial count (TBC) were determined and fitted to characterize the kinetic properties of each quality attributes at different storage temperatures. Besides, the Arrhenius equation was used to calculate the activation energy ( E a ) values, among which the Au@Ag NRs TTI, TA, pH and TBC showed E a values of 70.36, 65.67, 127.87 and 52.33 kJ/mol, respectively. Results showed that the TTI and TA possessed more similar E a values, suggesting that the TTI could predict the TA of pasteurized milk in the cold chain more accurately. Furthermore, a dynamic temperature test was performed to verify the applicability and reliability of the TTI. Temperature accumulation effects were calculated and effective temperatures ( T eff ) of the TTI and the pasteurized milk were determined as 287.4 K and 287.3 K, respectively, which indicated high sensitivity and good applicability of the TTI for quality monitoring of the real milk system, showing great application potentials for cold chain intelligent labels.
研究领域:
食品科学
·
纳米技术
✓ 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）