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
·
材料科学
✓ 已验证
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
·
包装工程
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
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
·
微生物学
·
食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF PHARMACEUTICS
·
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
·
呼吸医学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Energetic Materials Frontiers
·
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
·
含能材料
·
高分子化学
·
晶体工程
·
安全性能
✓ 已验证
产品关联
DOI
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
JOURNAL OF POLYMERS AND THE ENVIRONMENT
·
2022
·Vol. 31
·期 1
·287-296
·
IF 4.705
Xie Shiyu,Xu Bo,Yuan Li,Zhao Yaxin,Ma Na,Wang Yaomin,Liu Dagang,Xiang Aimin,Ouyang Yuge,Tian Huafeng
Zein as a natural protein had been widely used in various fields due to its biodegradability and biocompatibility. However, its sensitivity to humidity and poor mechanical performance limited its application in practice. In this study, zein-based composite nanofibers loaded with curcumin were prepared by electrospinning assisted with polyvinyl alcohol (PVA). The filtration efficiency of the modified nanofibers to the particles with diameters larger than 0.5 μm was all above 98%. The loaded curcumin interacted with protein molecular chains to form a network structure within tightly connected nanofibers, which exhibited excellent moisture resistance and good adhesion to cellulose paper towels used as air filter substrates. Meanwhile, its tensile strength had also been enhanced vastly to 0.72 MPa compared with the initial tensile strength of 0.21 MPa. This study provides a new electrospinning strategy for the preparation of zein-based composite nanofibers that can be widely utilized in air filtration with high moisture resistance.
研究领域:
材料科学
·
环境工程
·
纳米技术
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Feilong Liu,Yingyuan Chen,Bojana Milićević,Chunyan Jiang,Senchuan Huang,Lei Zhou,Jianbang Zhou,Mingmei Wu
A facile strategy to modify the surface of K 2 SiF 6 :Mn 4+ (KSFM) with commercially available hydrophilic hydroquinone (HQ) has been developed and waterproof stability (moisture resistance) of the KSFM has been significantly improved. It has been demonstrated that there are strong interactions between KSFM and HQ on the interface due to the hydrogen bonds of fluorine in KSFM with hydrogen in HQ. The relative luminous intensity of HQ-modified KSFM (denoted as KSFM-HQ) remained 99.7% of its initial value after immersion in water for 336 h, remarkable higher than that of KSFM which remained only 38.0%. It is proposed that the high water resistance of KSFM-HQ is achieved via two possible mechanisms: in situ decomposition of dark brown manganese (owing to the hydrolysis of [MnF 6 ] 2− ) on the KSFM crystal surface and consequently the formation of a more protective Mn 4+ -free layer. The process effectively combines the advantages of transparent organic materials (herein HQ) before immersion in water and durable moisture resistance of inorganic materials (herein K 2 SiF 6 ) on surface after immersion in water. The importance of HQ loading on moisture-sensitive fluoride phosphors has been further confirmed by using HQ-treated K 2 GeF 6 :Mn 4+ (KGFM) as an additional example. This strategy provides a one-of-a-kind way to the development of water-resistant Mn 4+ -doped fluoride phosphors with high luminous stability for potential applications in water-borne fluorescent anti-counterfeiting ink and even warm WLEDs operating in high humidity.
研究领域:
材料科学
·
化学
·
光电技术
·
荧光粉技术
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2023
·
IF 11.2
Fan Wang,Jinling Zhan,Rongrong Ma,Yaoqi Tian
Bioactive compounds are frequently incorporated into polysaccharides (e.g., starch) to form active biodegradable films for food packaging, but some of them are water insoluble (e.g., curcumin , CUR) that will make the films have undesirable performance. Herein, CUR was successfully solubilized into the aqueous starch film solution by steviol glycoside (STE, a natural sweetener)-based solid dispersion. The mechanisms of solubilization and film formation were explored through molecular dynamic simulation and various characterization methods. The results showed that the amorphous state of CUR combined with micellar encapsulation of STE achieved the solubilization of CUR. STE and starch chains cooperated to form the film via hydrogen bonding , while CUR was uniformly and densely distributed within the film in the form of needle-like microcrystals. The as-prepared film exhibited high flexibility, great moisture barrier, and excellent UV barrier (UV transmittance : ∼0 %). Compared with the film containing CUR alone, the as-prepared film possessed higher release efficiency, antibacterial activity , and pH response sensitivity due to the assistance of STE. Hence, the introduction of STE-based solid dispersion can simultaneously improve the biological and physical properties of starch films, which provides a green, nontoxic, and facile strategy for the perfect integration of hydrophobic bioactive compounds and polysaccharide-based films.
研究领域:
食品科学
·
材料科学
·
生物技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nano Energy
·
2016
·
IF 11.553
Jiangsheng Xie,Xuegong Yu,Xuan Sun,Jiabin Huang,Yunhai Zhang,Ming Lei,Kun Huang,Dikai Xu,Zeguo Tang,Can Cui,Deren Yang
The recent rapid rise in power conversion efficiencies (PCEs) of perovskite solar cells (PSCs) has attracted worldwide extensive attention. However, the PSC applications are limited by their poor stability due to perovskite degradation in moisture. We used a fullerene amine interlayer in planar PSCs to reduce the interface barrier between ETL and metal electrode and also resist the moisture. The utilization of fullerene amine interlayer allowed for the enhancement of PSCs' performance, showing a highest power conversion efficiency (PCE)>17.2% with negligible hysteresis . More importantly, the air stability of PSCs with fullerene amine was improved: the unpackaged devices stored in air can keep their high performance with no obvious PCE loss in 10% humidity and >90% of the initial PCE in 45% humidity after 20 days.
研究领域:
材料科学
·
可再生能源
·
光伏技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2019
·
IF 7.467
Linsheng Huang,Xiaowen Zhou,Ranyun Wu,Changchang Shi,Rui Xue,Jifei Zou,Chao Xu,Jinling Zhao,Wei Zeng
A facile two-dimensional Pb-based metal-organic framework in hexagon sheet structure is developed, and an oriented haloing effect of framework is further demonstrated when it is composited with organic Spiro-OMeTAD layer based on experimental and model analysis. With the haloing effect, the composited layer shows the smoother surface, higher hydrophobicity and upshifted energy levels and electrical interfaces, in comparison to a pure Spiro-OMeTAD layer. When the composite layer is used as hole transfer layer in perovskite solar cells , the cell reveals the higher power conversion efficiency and moisture-resistance feather. The average efficiency of cell with the composite layer is 13.17%, which is 25% larger than that with pure Spiro-OMeTAD layer, and the cell can remain 54% efficiency of initial value even after 9 days in an environment of 30% relative humidity , in contrast, the efficiency of cell with pure Spiro-OMeTAD layer decays to 28% of initial value just after 7 days.
研究领域:
材料科学
·
太阳能技术
·
纳米技术
✓ 已验证
DOI
高影响因子
Advanced Energy Materials
·
2019
·Vol. 9
·期 12
·1802595
·
IF 24.884
Qin Zhou,Lusheng Liang,Junjie Hu,Bingbing Cao,Longkai Yang,Tingjun Wu,Xin Li,Bao Zhang,Peng Gao
Supported by the density functional theory (DFT) calculations, for the first time, a fluorinated aromatic cation, 2-(4-fluorophenyl)ethyl ammonium iodide (FPEAI), is introduced to grow in situ a low dimensional perovskite layer atop 3D perovskite film with excess PbI 2 . The resulted ( p -FC 6 H 4 C 2 H 4 NH 3 ) 2 [PbI 4 ] perovskite functions as a protective capping layer to protect the 3D perovskite from moisture. In the meantime, the thin layer facilitates charge transfer at the interfaces, thereby reducing the nonradiative recombination pathways. Laser scanning confocal microscopy unveils visually the distribution of the 2D perovskite layer on top of the 3D perovskite. When employing the 3D–2D perovskite as the absorbing layer in the photovoltaic cells, a high power conversion efficiency of 20.54% is realized. Superior device performance and moisture stability are observed with the modified perovskite over the whole stability test period.
研究领域:
光伏技术
·
材料科学
·
可再生能源
·
半导体器件
·
纳米技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）