MOLECULES
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2018
·Vol. 23
·期 5
·1105
·
IF 3.098
Wei Yang,Xiangyang Lei,Haohao Hui,Qinghua Zhang,Xueran Deng
Moisture-resistant silicone coatings were prepared on the surface of potassium dihydrogen phosphate (KDP) crystal by means of spin-coating, in which hydrophobic-modified SiO2nanoparticles were embedded in a certain proportion. The refractive index of such coating can be tuned arbitrarily in the range of 1.21–1.44, which endows the KDP optical component with excellent transmission capability as well as the moisture proof effect. A dual-layer anti-reflective coating system was obtained by covering this silicone coating with a porous SiO2coating which is specially treated to enhance the moisture resistance. Transmittance of such a dual-layer coating system could reach 99.60% and 99.62% at 1064 nm and 532 nm, respectively, by precisely matching the refractive index of both layers. Furthermore, the long-term stability of this coating system has been verified at high humidity ambient of 80% RH for 27 weeks.Keywords:moisture-resistant;refractive index tunable;high-power laser system
研究领域:
光学材料
·
涂层技术
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DOI
PubMed
高影响因子
Arabian Journal of Chemistry
·
2018
·
IF 2.969
Baha I. Elzaki,Yue Jun Zhang
Ammonium nitrate surface is extremely hygroscopic, due to high energy on its surface which increases the potential of the molecules to absorb moisture from the surrounding environment. Ammonium nitrate particles were modified using second coating process with myristic acid in the different amount. The hygroscopicity was tested for ammonium nitrate with and without coating. Fourier transform infrared (FTIR) and scanning electron microscopy (SEM) were used to characterize the surface of coated and uncoated ammonium nitrate. Meanwhile, the method determined mass ratio of coating layer was improved to achieve more accuracy. In addition, focused ion beam technique was used to determine the thickness of coating layer. The results indicated that by using second coating modification method of surfactant adsorption, the anti-hygroscopicity performance of coated samples was significantly improved. The result showed that the decline of the absorption moisture rate was 40.57%, and the mass ratio of the coating layer was 1.42%. These results suggest that the second coating process employed could provide the well fundamental for the further anti-hygroscopic surface modification of ammonium nitrate particles coated by surfactants.
研究领域:
化学工程
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材料科学
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产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Qi Zhang,Jian Zhang,Qingwei Ping,Zhihui Sui,Xiangyu Cao,Tianyuan Xiao
Curcumin-based smart films have gained widespread attention in the packaging field due to their convenience, ease of use, and environmental sustainability. However, its poor pH response, unsatisfactory mechanical properties , and limited moisture resistance severely restrict its applications. In this study, we prepared a curcumin-based bilayer indicator film with a protective layer consisting of gelatin, carboxymethyl cellulose , and hexadecyl trimethoxy silane to provide mechanical protection and moisture resistance, and an indicator layer consisting of gelatin, curcumin, and malvidin to improve the pH sensitivity of the curcumin-based film and broaden the range of color indication. Owing to the hydrophobic effect of the protective layer and cross-linking between the bilayers, the curcumin-based bilayer film exhibited excellent mechanical properties with a stress of 15.3 MPa, a strain of 101.6 %, and a Young's modulus of 38.9 MPa. The moisture resistance of the film was also improved, with a water vapor permeability as low as 1.11 ± 0.15 × 10 −10 g m m −2 Pa −1 s −1 . In addition, with the addition of malvidin, the curcumin-based bilayer film showed greater sensitivity to pH and more pronounced color changes compared to the gelatin/curcumin film for practical applications in monitoring shrimp freshness. Overall, this study demonstrated the applicability of the prepared curcumin-based bilayer indicator film for monitoring shrimp freshness and also broadened the prospects of curcumin-based films in the field of smart packaging.
研究领域:
食品科学
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包装工程
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产品关联
DOI
高影响因子
FOOD CHEMISTRY
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2024
·
IF 8.5
Chenggang Song,Na Guo,Aoran Xue,Chengguo Jia,Wuliang Shi,Mingyuan Liu,Mingzhe Zhang,Jianchun Qin
Mycotoxins are representative contaminants causing food losses and food safety problems worldwide. Thymol can effectively inhibit pathogen infestation and aflatoxin accumulation during grain storage, but high volatility limits its application. Here, a thymol-betaine co-crystal system was synthesized through grinding-induced self-assembly. The THY-TMG co-crystal exhibited excellent thermal stability with melting point of 91.2 °C owing to abundant intermolecular interactions . Remarkably, after 15 days at 30 °C, the release rate of thymol from co-crystal was only 55%, far surpassing that of pure thymol. Notably, the co-crystal demonstrated the ability to bind H 2 O in the environment while controlling the release of thymol, essentially acting as a desiccant . Moreover, the co-crystals effectively inhibited the growth of Aspergillus flavus and the biosynthesis of aflatoxin B 1 . In practical terms, the THY-TMG co-crystal was successful in preventing AFB 1 contamination and nutrients loss in peanuts, thereby prolonging their shelf-life under conditions of 28 °C and 70% RH.
研究领域:
食品安全
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微生物学
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食品科学
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产品关联
DOI
PubMed
高影响因子
Coatings
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2021
·Vol. 11
·期 12
·1518
·
IF 2.881
Qingqing Hu,Aijuan Lv,Yukang Ma,Yan Wang,Haoyi Zhang,Xin Mi,Qiang Xiao
High-performance anti-corrosion coatings featuring easy processability and thin thickness are highly desired in industry. Yet, solution process coating often faces a sedimentation problem with particles which are used as reinforcement in coatings. In this contribution, boron nitride (BN) was modified by an acrylate silane coupling agent (KH-570) to obtain acrylated BN flakes. Afterwards, the acrylated BN flakes were in situ copolymerized with 2-(perfluorohexyl)ethyl methacrylate to synthesize BN-fluorinated poly methacrylate (PFBP) composites. The as-obtained PFBP composites can form stable coating solutions, in which sedimentation of BN flakes seldom happens. The coating solution can easily form uniform coatings on various substrates with nanoscale thickness, confirmed by scanning electron microscope (SEM). The corrosion resistance of the samples coated PFBP coatings in 3.5 wt.% sodium chloride solution was evaluated by electrochemical impedance spectroscopy (EIS). It is indicated that the incorporation of BN flakes greatly reduce the corrosion rate. Adhesion measurements and abrasion resistance test indicate the PFBP coating performs good adhesion to substrate and robustness. Through the in situ polymerization, acrylated BN flakes are connected with the polymer chain, which inhibits the sedimentation of BN in the coating solution. Additionally, the BN flakes dispersed in the fluorinated polymer act as barriers, improving the corrosion resistance of the coated samples.Keywords:in situ polymerization;boron nitride;corrosion resistant;coating;fluorinated polymethacrylate;anti-moisture
研究领域:
材料科学
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化学工程
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腐蚀科学
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
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2022
·
IF 7.336
Xiangyu Wen,Xingbao Zhu,Yuanguo Wu,Yu Wang,Zining Man,Zhe Lv,Xi Wang
Oxygen selective membranes (OSMs) are considered to be an optimal solution for problems of lithium-air batteries (LABs) operating in an open environment. In this study, we use an electrostatic spinning method to fabricate a porous polytetrafluoroethylene hexafluoropropylene (PVDF-HFP) based oxygen selective membrane that was further impregnated with perfluoropolyether (PFPE) to achieve the goal of preventing permeation of moisture. The lithium-air battery under the protection of PFPE@PVDF-HFP can cycle stably for 620 h in an ambient air with relative humidity (RH) of 50%, which is 8 times better than the battery without the protection of OSM. In addition, through in situ electrochemical impedance spectroscopy (EIS) measurements, we illustrate the characterization of OSM more accurately. This electrochemical method provides a novel idea for the characterization of the performance of OSMs. The introduction of ruthenium oxide (RuO 2 ) nanoparticles to the cathode can further improve the cycling performance from 620 to 1200 h by promoting the decomposition of by-products.
研究领域:
材料科学
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电化学
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能源存储
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF PHARMACEUTICS
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2022
·
IF 6.51
Xuejuan Zhang,Yue Zhou,Guanlin Wang,Ziyu Zhao,Zhongxiang Jiang,Yingtong Cui,Xiao Yue,Zhengwei Huang,Ying Huang,Xin Pan,Chuanbin Wu
Poly-L-lysine (PLL) is a promising candidate for the treatment of pulmonary infection with lower occurrence of drug-resistance due to its unique antibacterial mechanisms. Dry powder inhalations (DPIs) are considered as the first choice for formulating PLL to treat pulmonary infection on account of direct delivery and satisfactory stability. However, hygroscopicity of PLL limited its therapeutic effect on pulmonary infection when PLL developed into DPIs. The hygroscopicity caused two obstacles including the low drug deposition in the lower respiratory tract and undesirable aerosolization performance deterioration. In this study, PLL was co-spray-dried with L-leucine (LL) to achieve moisture-resistance and desirable aerosolization performance. The ratio of PLL and LL was optimized to obtain particles with different morphology, hygroscopicity and aerodynamic properties. The obtained PLL DPIs were suitable for inhalation with a corrugated surface formed by hydrophobic LL. The anti-hygroscopicity, aerosolization performance and rheological properties of P 2 DPIs were optimal when PLL:LL = 85:15. The DPIs particles were stable after being stored at high relative humidity (60 ± 5%), and their superiority in treating pulmonary infections was also proved by in vitro and in vivo experiments. The established PLL DPIs were proved to be a feasible and desirable approach to treat pulmonary infections.
研究领域:
药学
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呼吸医学
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材料科学
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产品关联
DOI
PubMed
高影响因子
Energetic Materials Frontiers
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2025
·
IF 3.9
Ze-tan Shen,Lei Chen,Xiang Chen,Jiu-xiang Sun,Kai-xing Deng,Bing-cheng Hu,Chong Zhang
Abatract: Hydroxylammonium pentazolate (NH 3 OHN 5 ) is regarded as a novel energetic material with outstanding performance, yet its practical application has been hindered by significant hygroscopicity and high sensitivity. To address these challenges, this study prepared a series of NH 3 OHN 5 -based energetic composite microspheres using a combined solution-suspension method and copper-alginate (CA) gel network strategy. Experimental results demonstrated that the composite microspheres maintained well-defined morphology and preserved the original crystal structure, while exhibiting significantly reduced hygroscopicity and mechanical sensitivity, with a minimum energy loss of only 2.30%. Among the suspension-coated samples, the fluororubber (F 2603 )-coated sample (F-QA) exhibited the optimal comprehensive performance, which is attributed to the superior chemical inertness and hydrophobicity of fluororubber. This translated to a 9.48% reduction in hygroscopicity and an impact sensitivity of 40 J. Among all samples, the copper alginate-coated sample (SA-3) demonstrated superior overall performance. It exhibited a uniform and well-defined spherical morphology, with a 14.28% reduction in hygroscopicity compared to the raw NH 3 OHN 5 at 25 °C and 70% relative humidity ( RH ). Additionally, its impact sensitivity (16 J) improved by 11 J compared to the raw NH 3 OHN 5 (5 J), while the friction sensitivity (144 N) rose by 102 N relative to the raw NH 3 OHN 5 (42 N). This work demonstrated that F 2603 and copper alginate are effective coating materials, providing excellent anti-hygroscopicity and reduced impact sensitivity, which promoted the application of NH 3 OHN 5 as a novel explosive in the field of energetic materials.
研究领域:
材料科学
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含能材料
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高分子化学
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晶体工程
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安全性能
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Tong Hao,Rongrong Chen,Yingfeng Lu,Zainab Rasheed,Jing Yan,Suqing Li,Wen Qin,Mingrui Chen,Yaowen Liu
Yellow peach slices are popular for their nutritional value and portability, but they tend to absorb moisture and lose nutrients during storage. In this study, a biodegradable, superhydrophobic, and moisture-resistant paper-based packaging material was developed by coating kraft paper (KP) with a composite formulation of pea starch (PS), shellac (SH), zein (ZE), and stearic acid (SA). The selection of this composite system was based on the complementary functional properties of its components: PS provided a biodegradable matrix with good film-forming ability, SH contributed moisture resistance and adhesion, ZE enhanced mechanical strength and hydrophobicity, while SA further lowered surface energy to achieve superhydrophobicity. The coatings were applied through hydrogen bonding and electrostatic interactions, creating a robust barrier on the paper surface. The coated papers were evaluated for oxygen permeability (OP), water vapor transmission rate (WVTR), water contact angle (WCA), and rolling angle (RA). Results demonstrated that the PS/SH/ZE/SA-coated KP exhibited an 83.1 % reduction in WVTR and a 79.8 % decrease in OP compared to unmodified KP. The optimal formulation (KP/PS/SH/ZE/SA-3 %) displayed the lowest moisture content (MC) and achieved a WCA exceeding 150°, confirming superhydrophobicity. Additionally, the coatings significantly improved thermodynamic stability and imparted self-cleaning properties to the paper. These findings suggest that the developed composite coating can effectively modify paper-based packaging for moisture-sensitive applications, such as dehydrated yellow peach slices and other dry foods, offering a sustainable alternative to conventional plastic-based packaging.
研究领域:
食品科学
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材料科学
·
包装技术
·
食品保鲜
·
高分子科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Omega
·
2024
·
IF 3.7
Lei Xiao,Xinfei Wang,Tianfu Zhang,Xiaojun Feng,Kun Zhang,Junqing Yang,Xiaoming Jin,Gazi Hao,Wei Jiang
In order to achieve new energetic materials with high energy, low sensitivity, and moisture-proof properties, dihydroxylammonium 5,5′-bistetrazole-1,1′-diolate (TKX-50)/ammonium perchlorate (AP) cocrystal (molar ratio 1:1) was successfully prepared through a spray-assisted solvent–nonsolvent method. SEM shows that the morphology of the cocrystal is different from those of the two raw materials. XRD and FT-IR spectra indicate the formation of the cocrystal. The apparent activation energy of the cocrystal is lower than that of raw TKX-50. The characteristic drop height (H50) is higher than that of TKX-50, while the friction sensitivity (P) of the cocrystal is lower. In addition, the moisture-proof property of the cocrystal is improved, showing good application potential.
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
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Xiao Chen,Xiao Peng,Chuanhui Wei,Zixun Wang,Jin He,Hengrui Sheng,Tao Jiang,Kai Dong
Breathing is an important physiological health indicator of the human body. Real time and long-term monitoring with low attenuation of human respiratory health status is of great significance. However, the working performance of respiratory sensors typically placed at the mouth and nose of the human body is greatly affected by exhaled moisture and small pollutants. Here, an all-nanofiber self-powered respiratory sensor (ASRS) with a multi-layer stacking structure is developed based on contact electrification or triboelectrification effect. By spraying method to chemically graft low surface energy octadecyltrichlorosilane (OTS) small molecules onto the surface of nanofibers, the ASRS is endowed with excellent superhydrophobicity and self-cleaning properties, making it free from the influence of high humidity and small particle pollutants in exhaled gas. Due to the gradient variation of contact interface with increasing pressure, the ASRS exhibits a multi-stage linear sensitivity response trend, which has high pressure response sensitivity of 0.048 kPa −1 . In addition, the ASRS is further integrated on a smart mask for real-time and long-term monitoring of respiratory health status, including age and gender of subjects, physical activity status, and sleep apnea syndrome. This work provides an effective self-powered sensing strategy for daily physiological monitoring, proactive healthcare, and early disease warning.
研究领域:
生物医学工程
·
纳米技术
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可穿戴设备
·
健康监测
✓ 已验证
产品关联
DOI
高影响因子
INDOOR AND BUILT ENVIRONMENT
·
2025
·
IF 2.9
Pengfei Zhang,Wenjian Han,Bo Zhou,Haiqian Zhao
The metal-organic framework MIL-100(Fe) is a novel humidity-regulating material, but it has poor water vapour desorption performance. To address this issue, MIL-100(Fe) was modified using 20% lithium chloride (LiCl), forming stable coordination bonds through ion-dipole interactions. These bonds attract water molecules, enhancing the adsorption capacity and improving the structural stability of the material. After modification, its moisture capacity was increased by 2.42 times, and the desorption amount was increased by 7.22 times, with an overall improvement in moisture adsorption–desorption equilibrium. However, the use of inorganic salts presents a leakage problem in high-humidity environments. To counter this, a 3% ethyl cellulose (EC) coating was applied to the modified MIL-100(Fe). Through surface interactions, this modification improved the material's adsorption performance in non-polar environments, preventing deliquescence in long-term high-humidity conditions. The hydrophobic angle of the modified composite material reached 93°, making the surface hydrophobic. The moisture capacity of the composite material was 1.83 times that of the pure MOF, and the desorption amount was increased by 5.2 times, significantly enhancing the material's environmental humidity regulation performance. Additionally, the material demonstrated good reusability, extending its lifespan, making it suitable for use as an intelligent humidity control material in construction.
研究领域:
材料科学
·
环境功能材料
·
纳米多孔材料
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建筑节能
·
智能响应材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）