STARCH-STARKE
·
2021
·
IF 2.741
Hui Yang,Rihui Lin,Yanye Fan,Sai Jiang,Yujiao Lin
The rosin acid starch (RAS) is prepared under the catalysis of lipase, by esterification on the starch particles' surface in a two-phase reaction system, using rosin acid and native cassava starch as starting materials. The effects of reaction time, solvent types, substrate ratio, reaction temperature, and lipase dosage on the degree of substitution (DS) of RAS are investigated. Based on the single factor experiments, the reaction conditions are optimized according to the principle of the combination Box-behnken centered design and response surface methodology analysis. The mathematical model of the influence of reaction temperature, material ratio, and enzyme addition amount on DS is established. The optimum synthesis conditions are determined as follows: solvent, trichloromethane; reaction time, 10 h; reaction temperature, 59 °C; substrate ratio (m Rosin acid :m starch) , 4.1; and lipase dosage, 264 µL. Under these conditions, it is found that the DS is 0.0608. The analysis of variance and verification experiments show that the mathematical model has good fit degree and high credibility. Compared with the native cassava starch, RAS has improved contact angle, emulsion capacity, and emulsion stability.
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
MATERIALS & DESIGN
·
2020
·
IF 6.289
Zhaoshuang Li,He Liu,Xu Xu,Lina Ma,Shibin Shang,Zhanqian Song
Despite advanced sterilized and aseptic techniques, biomaterial-associated infections are still posing a great threat to human life. Therefore, constructing antimicrobial coating that exerts potent antimicrobial activity combined with low cytotoxicity is of great significance. Herein, an antimicrobial coating on the surface of silicone elastomer (PDMS) has been successful constructed, which based on maleopimaric acid quaternary ammonium cation (MPA-N + ). The surface morphology and chemical composition of modified PDMS (PDMS- g -MPA-N + ) were confirmed by scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), and X-ray photoelectron spectroscopy (XPS). The PDMS- g -MPA-N + possess excellent antimicrobial activity against both Gram-positive bacterial ( Staphylococcus aureus ) and Gram-negative bacterial ( Escherichia coli , Pseudomonas aeruginosa ) strains. In addition, confocal laser scanning microscopy imaging demonstrated that it also can effectively inhibit bacterial biofilm formation over 5 days. Most importantly, PDMS- g -MPA-N + exhibited excellent biocompatibility, which induced no significant hemolysis and cytotoxicity toward mammalian cells. The study demonstrated that the silicone elastomer surface grafted with MPA-N + enabled the incorporation of a renewable biomass to effectively combat bacteria and biofilm formation for biomedical applications.
研究领域:
生物医学工程
·
材料科学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS & DESIGN
·
2022
·
IF 9.417
Yingxuan Wang,Zhaoshuang Li,Jiping Wang,Jingran Wang,Xiangzhou Li,Chuntao Kuang
Blood repellent dressings plays an important role in trauma medicine. However, such dressings have poor hemostatic efficacy, and can cause infection, rendering them unsatisfactory for clinical application. We prepared a durable superhydrophobic coating for blood repellent dressing based on rosin acid and TiO 2 with a water contact angle of 155.7° and a sliding angle of 5°. The morphology and chemical composition of the coating were characterized by scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS) and X-ray spectroscopy (XPS), respectively. The superhydrophobic coating can withstand at least thirty sandpaper abrasions and sixteen washing treatments without losing its superhydrophobic properties. Meanwhile, the superhydrophobic coating demonstrated excellent antimicrobial activities against Gram-positive Staphylococcus aureus ( S. aureus ) (with log reduction = 1.73) and Gram-negative Escherichia coli ( E. coli ) (with log reduction = 1.74) and effectively prevented biofilm formation. Besides, the excellent biocompatibility of the superhydrophobic coating was verified by hemocompatible and cytotoxic assays. Finally, it was confirmed that the superhydrophobic coating can reduce blood loss and allows for high air permeability in in vitro tests. The superhydrophobic coating based on rosin acid and TiO 2 provides a simple way for preparing novel blood repellent dressings, which may have promising applications in wound dressings.
研究领域:
创伤医学
·
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
BIOORGANIC CHEMISTRY
·
2020
·
IF 4.831
Zhe Zhou,Jing Long,Yuan Wang,YaYun Li,Xu Zhang,Ling Tang,Qi Chang,Zhuo Chen,GaoYun Hu,Shuo Hu,QianBin Li,Cong Peng,Xiang Chen
CD147 is a transmembrane glycoprotein and a member of immunoglobulin superfamily, is strongly expressed in melanoma cells. CD147 has a pivotal role in tumor development. Therefore, it is a potential drug target for melanoma. In this article, we report the discovery of the first CD147 protein proteolysis targeting chimeras (PROTACs) derived from the natural product pseudolaric acid B (PAB). The representative compound 6a effectively induced degradation of CD147 and inhibited melanoma cells in vitro and in vivo. 6a could be used as the novel type of anticancer agent or as a part of the molecular biology research toolkit used in the gain-of-function study of the dynamic roles of CD147 in cancer networks.
研究领域:
肿瘤学
·
分子生物学
·
药理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART B-PESTICIDES FOOD CONTAMINANTS AND AGRICULTURAL WASTES
·
2022
·
IF 2.506
Linlin Wang,Qiang Hu,Yanmin Huang,Qipeng Xiong,Yong Chen,Chunfang Gan,Yuanfei Zhang,Guoqin Cui,Jianguo Cui
The controlled release formulations (CRFs) are considered an effective way to solve damage to the environment caused by traditional pesticide formulations. To change the defects of traditional neonicotinoid formulations that dissolve quickly in soil, three types of thiamethoxam (TM) CRFs microspheres with content of 20% TM were prepared using microcrystalline wax (MK) as the matrix, laurate acid tapioca starch ester (MSK) and stearyl dehydroabietic acid ester (MDK) as the regulators of ingredient release. The release behavior of CRFs microspheres in water and soil showed that the microspheres had superior stability and different TM sustained-release periods, and TM release of the microspheres in soil was faster than that in water. The release rate is TM/MDK > TM/MSK > TM/MK. In water, the release of thiamethoxam technical was finished after 38 hours. However, for TM/MK, the release rate was 94% after 240 hours, and the release time was extended by 6 times. Meanwhile, TM/MDK has a particular pH-responsive release. Research shows that using microcrystalline wax as the matrix, by adding MSK or MDK to adjust the release of ingredients, pesticide CRFs microspheres with different release periods can be prepared to achieve the purpose of controlling the release of pesticides.
研究领域:
农药科学
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROANALYSIS
·
2012
·Vol. 24
·期 7
·1647-1654
·
IF 2.872
Li Liu,Xuecai Tan,Xiaoxue Fang,Yuexin Sun,Fuhou Lei,Zaiyin Huang
A novel cross-linker (functional abietic-type acids) for preparing highly sensitive, molecularly imprinted sensors was proposed for quinine determination. A MIP film was created on a glassy carbon electrode for determination of quinine using free radical polymerization method. The modification procedure was characterized via electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). The interaction between functional monomer and target molecule was observed by UV spectrometric methods. Under the optimal experimental conditions, the peak currents were proportional to the concentrations of quinine in the range from 8.0×10 −7 to 2.6×10 −4 M with a detection limit of 2.0×10 −8 M. Meanwhile the prepared sensor showed sensitive and selective binding sites for quinine. Determination of quinine in tonic water showed good recovery.
研究领域:
分析化学
·
生物传感技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2023
·
IF 11.1
Chaoqi Chen,Shichao Xu,Xu Xu,Yini Cao,Yan Qing,Yiqiang Wu,Zhaoshuang Li
Developing multifunctional materials with green, lasting, and simple preparation processes is a hot topic and challenge in solving the problem of oil spill contamination. A multifunctionalized superhydrophobic coating was generated via cross-linking 3-(Trimethoxysilyl) propyl acrylate with Polyethyleneimine in a multifunctional covalent manner and modifying the cotton fabric surface with silylated modified rosin acid (RA-Si) as well as TiO 2 nanoparticles . The coated samples had remarkable superhydrophobicity with self-cleaning as well as stain resistance. With bactericidal rates of 97.73 % and 98.36 %, respectively, the coated samples effectively inhibited the formation of biofilms and showed high antimicrobial performance for both Staphylococcus aureus and Escherichia coli . Meanwhile, the coated samples showed outstanding oil absorption and separation of the oil-water mixture. Both water-in-oil and oil-in-water stable emulsions would be effectively separated out of the coated samples after demulsifying. Additionally, the water droplet contact angle of the coated samples was maintained at approximately 150.0° after mechanical and chemical testing. It was noteworthy that the coated samples still exhibited satisfactory separation for stabilizing oil/water emulsions after mechanical wear and chemical corrosion treatment, indicating their excellent mechanical durability. The prepared multifunctional RA-TiO 2 superhydrophobic coating has promising applications in oil-containing wastewater treatment and environmental remediation.
研究领域:
材料科学
·
环境科学
·
生物学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Min Cai,Zhaoshuang Li,Rongkang Chen,Yin He,Xu Xu,Xu-Min Cai,Wei Yuanfeng,Zhenfei Yang,Chuntao Kuang,Guoen Yang,Yan Qing,Xingong Li,Yiqiang Wu
Room-temperature phosphorescent (RTP) materials based on carbon dots (CDs) have received much attention due to their potential applications in anti-counterfeiting in recent years. However, it remains a considerable challenge to prepare CDs-based RTP materials with sunlight excitation and excellent stability. This work provides a straightforward method for one-step calcination of rosin-based carbon quantum dots (R-CDs) with aluminum hydroxide (Al(OH) 3 ) to create ecologically sustainable room-temperature phosphorescent materials (CDs@Al 2 O 3 ). CDs@Al 2 O 3 exhibit excitation dependence, emitting green phosphorescence under 365 nm excitation, yellow phosphorescence under visible light excitation, and blue-green phosphorescence under sunlight excitation. Surprisingly, CDs@Al 2 O 3 display time-dependent afterglow, switching from blue to green phosphorescence when excited at 285 nm. Furthermore, after being submerged in polar and acid-base solutions for 21 days, the phosphorescence of CDs@Al 2 O 3 is still visible to the unaided eye. At last, CDs@Al 2 O 3 composites are utilized in applications including smart flashing traffic signals, multi-level information, and anti-counterfeiting. This work expands creative application opportunities by offering a straightforward and adaptable approach to generating ecologically friendly RTP materials.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Chaoqi Chen,Zhaoshuang Li,Yinchun Hu,Qin Huang,Xiangzhou Li,Yan Qing,Yiqiang Wu
Currently, fluorides and long-chain aliphatic compounds are the most frequent low surface energy chemicals utilized in the preparation of superhydrophobic coatings , but associated environmental risks and instability restrict their potential application in oil-water separation. This research described a superhydrophobic coating based on rosin acid and SiO 2 modified cotton fabric to overcome this challenge. By means of spray impregnation and UV-assisted click reaction, sulfhydryl modified rosin acid (RA), Octavinyl-POSS, and SiO 2 were grafted onto the surface of cotton fabric to obtain RA-SiO 2 superhydrophobic coating with rough surfaces such as lotus leaf and low surface energy. The RA-SiO 2 superhydrophobic coating had favorable self-cleaning ability, and also adsorbed various light and heavy oils to achieve efficient separation of oil-water mixtures. The separation efficiency was 96.3% and the permeate flux was 6110.84 (L⋅m −2 ⋅h −1 ) after 10 repetitions. The RA-SiO 2 superhydrophobic coating was found to be effective in separating oil-in-water and oil-in-water emulsions, and the separation mechanism was elaborated. In addition, it could effectively separate emulsions even after mechanical abrasion and chemical immersion, and had excellent stability. The fluorine-free and environmentally friendly low-cost superhydrophobic coating based on rosin acid is expected to play a significant potential in oil-water separation applications due to its excellent separation performance.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
IRANIAN POLYMER JOURNAL
·
2016
·Vol. 25
·期 11
·957-965
·
IF 1.684
Li Tingting,Liu Xiaoqing,Jiang Yanhua,Ma Songqi,Zhu Jin
A bio-based shape memory epoxy resin (DGEAPA) was synthesized from rosin to achieve the sustainability of shape memory epoxy resin, and its chemical structure was determined by FTIR and 1 H NMR. For comparison, a petroleum-based epoxy, diglycidyl ester of terephthalic acid (DGT) having one benzene ring, was also synthesized. The properties, including thermal and mechanical properties, as well as shape memory properties of the epoxy resins cured with poly(propylene glycol)-bis (2-aminopropyl ether) (D230), were studied by differential scanning calorimeter, dynamic mechanical analysis, thermogravimetric analysis, tensile test, and U-type shape memory test. The effect of the stoichiometric ratio n DGEAPA /n DGT on the properties was studied as well. The thermal and mechanical properties, including thermal stability, glass transition temperature, tensile strength, and modulus of the cured epoxy systems, were found to be increased with DGEAPA incremental content, and the cured neat rosin-based epoxy system exhibited the highest properties. Both the cured rosin-based epoxy and the cured DGEAPA showed significant shape memory performance. Meanwhile, the rosin ring structure made the cured rosin-based epoxy systems display excellent shape recovery fixity, while small lower shape recovery and shape recovery rate relative to the cured neat DGT system. Therefore, the rosin-based epoxy resin has a great potential in the shape memory material applications.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
DYES AND PIGMENTS
·
2023
·
IF 4.5
Yutong Xiong,Weiren Zhong,Xuedan Zhang,Yuting Lin,Zhenguo Tang,Shouji Li,Xu-Min Cai
The petrochemical-based multi-stimuli responsive materials have been widely explored as advanced functional materials in the past several decades, but they inevitably face problems like complicated synthesis, non-renewability, and non-sustainability. On this basis, the bio-based materials used to construct multi-stimuli responsive due to the unique natural structures have come to the fore. In this work, three novel triphenylamine-based salicylideneanilines have been simply designed with aggregation-induced emission (AIE) properties. Among all, DAMB-TPAOH and DAMB-TPA possessing the natural structure of dehydroabietic acid from rosin are bioproduct-inspired AIE luminogens (BioAIEgens). Derived from the excited-state intramolecular proton transfer (ESIPT) and restriction of intramolecular motion (RIM) dual-mechanism caused by the hydroxyl group and rigidification of alicyclic moiety, respectively, the solid-state DAMB-TPAOH exhibits red-shifted (compared to DAMB-TPA ) and stronger (compared to BA-TPAOH ) emission, endowing this BioAIEgen with the best fluorescence behavior. Further, the introduction of the natural skeleton, propeller TPA, and imine group results in the high-contrast mechanochromic and acidichromic properties of DAMB-TPAOH . The multi-stimuli responsive properties endow DAMB-TPAOH with potential utilization in the manufacture of rewritable paper and multi-color ink. The current work contributes greatly to the development of BioAIEgens with both mechanochromism and acidichromism.
研究领域:
材料科学
·
有机化学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 133
·期 15
·
IF 1.768
Hongyan Si,He Liu,Shibin Shang,Jie Song,Shengliang Liao,Dan Wang,Zhanqian Song
Maleopimaric acid (MPA), an important rosin derivative, was used to partially substitute isophthalic acid for the preparation of an anionic polyol (MPP) dispersion. The MPP dispersion was then applied to prepare a novel maleopimaric acid-modified two-component waterborne polyurethane (MPP-2K-WPU). The influences of NCO:OH molar ratio on the thermal properties, water absorption, surface free energy, and application properties of MPP-2K-WPU films were investigated. With increasing NCO:OH molar ratio, the thermal stability, pencil hardness, and ethanol resistance of MPP-2K-WPU films were improved, but the water resistance was enhanced firstly and then weakened. The surface free energy of MPP-2K-WPU films mainly depended on the dispersion interaction which was related to the structure of macromolecules. In addition, compared with the control sample of PP-2K-WPU(1.5:1) film, the MPP-2K-WPU(1.5:1) film exhibited improved thermal stability, water resistance, gloss, pencil hardness, and ethanol resistance. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43292.
研究领域:
材料科学
·
化学工程
✓ 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）