FOOD CONTROL
·
2015
·
IF 2.806
Zhiyong Zhao,Na Liu,Lingchen Yang,Jianhua Wang,Suquan Song,Dongxia Nie,Xianli Yang,Jiafa Hou,Aibo Wu
The primary objective of this study was to synthesize three types of cross-linked chitosan polymers and further investigate their adsorption capability for multiple mycotoxins , including aflatoxin B 1 (AFB 1 ), ochratoxin A (OTA), zearalenone (ZEN), fumonisin B 1 (FB 1 ), deoxynivalenol (DON) and T-2 toxin (T2). Among these synthetic adsorbents, cross-linked chitosan-glutaraldehyde complex presented the highest adsorption capability for AFB 1 (73%), OTA (97%), ZEN (94%) and FB 1 (99%), but no obvious adsorption for DON and T2 (<30%). The effect of various incubation conditions (contact time, dosage and pH) was also studied. Subsequently, the experimental data were fitted to Langmuir, Freundlich and Hill models. The best fitting model to describe AFB 1 and FB 1 adsorption was Langmuir model ( R 2 ≥ 0.99), with the theoretical maximum adsorption amounts of 5.67 mg/g for AFB 1 and 15.7 mg/g for FB 1 . The Hill model was the best model for OTA and ZEN adsorption ( R 2 > 0.98), with the predicted maximum adsorption amounts were 24.8 mg/g for OTA and 9.18 mg/g for ZEN. In addition, the adsorption capability of adsorbent for the simultaneous presence of multiple mycotoxins was also evaluated in buffer system and simulated gastrointestinal condition. The results indicated that the coexisted multiple mycotoxins didn't affected the adsorption capability of adsorbent, whereas the adsorption amounts of toxins were decreased by some gastrointestinal components. The findings of this research suggest that chitosan–glutaraldehyde complex has the potential to be applied as multitoxin adsorbent material for reducing the combined adverse effect of multiple mycotoxins on humans and animals.
研究领域:
食品科学
·
毒理学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2013
·Vol. 31
·期 3
·399-406
·
IF 1.27
Tan Ye-qiang,Song Yi-hu,Zheng Qiang
Colloidal suspensions of glutaraldehyde (GA) crosslinked or grafted graphene oxide (GO) sheets were fabricated by simply tailoring the feed sequence. The different structures were confirmed by Fourier transform infrared spectra and X-ray diffraction. As demonstration of the utilities, the different colloidal suspensions were used to prepare free-standing papers by flow-directed filtration and poly(vinyl alcohol) (PVA)-based nanocomposite films by casting. Free-standing papers from GA crosslinked GO sheets exhibited better mechanical properties than unmodified GO paper, while nanocomposite films from GA grafted GO exhibit higher tensile strength and Young’s modulus.
研究领域:
材料科学
·
纳米技术
·
高分子化学
✓ 已验证
DOI
高影响因子
Advanced Materials Interfaces
·
2025
·
IF 4.4
Lei Sun,Fei Ye,WenHui Zhu,Wenrui Tan,Leixin Xiang,Yang Liu,Shiming Zhang
Macroemulsions are thermodynamically unstable and prone to phase separation. Traditional stabilization methods using surfactants to reduce interfacial tension are limited due to the physical barrier's instability—thermal motion can cause surfactant desorption, leading to interface collapse and phase separation. Strengthening this physical barrier is therefore crucial for extending the lifespan of macroemulsions. This manuscript presents an innovative stabilization method for macroemulsions, utilizing homogeneous phase Schiff base polymerization at the oil-water interface. The Schiff base reaction between polyethyleneimine (PEI), which accumulates at the interface, and glutaraldehyde (GA) to form a robust interfacial film is exploited. This simple method prevents the phase separation of oil-in-water high internal phase emulsions (HIPEs) for over 110 days. More importantly, the acid degradation of the interfacial film, together with the protonation state of polyethyleneimine under varying pH conditions, offers a stability programmable emulsion system that leads to pH-responsive emulsions, HIPEs, and capsules.
研究领域:
材料科学
·
化学工程
·
界面化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Chenshi Shang,Yingxi Liu,Xiangrui Zeng,Wan Jie Luo,Lulu Wang,Jilin Wang
In this paper, self-made diformyl-dibenzo-18-crown-6 ether (DDB 18 C 6 ) is in-situ grafted into the pores of mesoporous molecular sieve (SBA-NH 2 ), and then the aforementioned modified molecular sieve (SBA-C) is introduced into the polyvinyl alcohol solution, and then the glutaraldehyde as the crosslinking agent to synthesized the anion exchange membrane under for fuel cell application . During the experiment, a series of anion exchange membranes (P-(SBA x% -C), x is the mass fraction of SBA-NH 2 ) is developed and the pore channels and chemical structures of the aforementioned membrane is verified by FT-IR, SAXD , N 2 adsorption-desorption, 1 H NMR and XPS . Moreover, the performance of the membrane synthesized in this paper is also investigated and the results revealed that the unique membrane internal structure can improve the OH − transportation efficiency. Furthermore, the ionic conductivity of P-(SBA 10% -C) membrane is the highest (0.107S·cm −1 ) and the power density is the highest (354.8 mW cm −2 ) at 80 °C. By immersing P-(SBA 10% -C) membrane in 6 mol L −1 KOH solution for 168 h, the conductivity at 80 °C only decreased by 2%, proving that P-(SBA 10% -C) has a higher conductivity, good single cell performance and alkali stability.
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
Water Cycle
·
2023
·
IF 0
Yuankun Liu,Xinxia Zhang,Liyuan Zhao
In this work, the magnetic chitosan nanoparticles were prepared by in-situ co-precipitation method and then modified by glutaraldehyde and ethylenediamine. The effect dose of crosslinking agents for adsorbent preparation on tetracycline (TC) adsorption was investigated. The experiment results showed that the modified chitosan (EMMCS-G) had the best adsorption performance, which was more than twice that of raw magnetic chitosan. EMMCS-G was characterized by SEM, TEM, VSM, FTIR, XRD and XPS. The effects of experimental parameters such as time, temperature, pH, adsorbent dosage and Cu 2+ on TC adsorption by EMMCS-G were discussed. The result indicated that the optimal pH was 6.5. Under the conditions of an initial TC concentration of 50 mg/L and an EMMCS-G dosage of 50 mg, the removal rate reached an impressive 94%. The isotherm and kinetic studies of adsorption process illustrated that adsorption of TC onto EMMCS corresponded to Freundlich isotherm and pseudo-second-order kinetic models. The maximum adsorption capacity was 84 mg/g. Thermodynamic analysis revealed that adsorption process was both endothermic and spontaneous. The regeneration experiment suggested that the adsorbent possessed excellent reusability for further use. Moreover, the adsorption mechanisms of TC onto EMMCS-G mainly involved pore filling, π-π interactions, hydrogen bonding and electrostatic attraction.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
DOI
Catalysts
·
2020
·Vol. 10
·期 11
·1266
·
IF 3.52
Ting Zou,You-dan Duan,Qiao-e Wang,Hai-ming Cheng
Biodiesel offers an important alternative to fossil fuel. In this work,Eversa Transform2.0 lipase was immobilized onto 3-aminopropyltriethoxysilane (APTES) modified silica clay (SC) by glutaraldehyde. The characteristics of the functionalized supports and the immobilized lipase were investigated by FTIR, TEM, BET, and XRD. The results show that the optimal conditions of lipase immobilization are as follows: 2% glutaraldehyde concentration, 15 mg/mL lipase concentration and incubating at 25 °C for 60 min. The immobilized lipase showed a high tolerance to temperature and pH variation in comparison to the free lipase. The immobilized lipase on SC was applied as a biocatalyst for the synthesis of biodiesel from methanol and canola oil. A biodiesel yield of 86% was obtained at a temperature of 45 °C via a three-step methanol addition. A conversion yield of 67% was maintained after reusing the immobilized lipase for five cycles. This work provides a strategy for the preparation of an efficient biocatalyst for the synthesis of biodiesel.Keywords:lipase;silica clay;biodiesel;immobilization;APTES;glutaraldehyde
研究领域:
生物化学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2017
·
IF 3.386
Yanbao Li,Song Yao
Water-soluble poly(vinyl alcohol) (PVA) nanofibers cannot be applied in aqueous condition. Fortunately, the PVA nanofibers can become stable in aqueous condition after physically or chemically crosslinked. However, these crosslinking methods require some harsh experimental conditions. In this article, organic solvents were introduced as the media to crosslink PVA nanofibers with glutaraldehyde , which is different from the conventional crosslinking method. The results of the field emission scanning electron microscopy (FESEM) show that the crosslinked PVA nanofibers can maintain the morphology not only in water but also in extreme solutions (such as hot water for 2 d, strong acid/alkaline solutions at 95 °C for 2 h). The tensile strength of the crosslinked PVA nanofiber mats can maintain more than 12.1 ± 1.1 MPa after soaked into these extreme solutions. The crosslinked PVA nanofiber mats with high stability and porous morphology have potential applications as filter membrane and adsorbing material.
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
Journal of Biobased Materials and Bioenergy
·
2023
·Vol. 17
·期 2
·225-231
·
IF 0.5
Wang Lei,Miao Lei,Chen Dong-Chu,Zhang Min
The recycling use of wood sawdust to process composite boards has received much attention in recent years. To avoid the use of chemical adhesives, natural cellulose-based materials were often used as adhesives to combine wood sawdust. Rather than utilizing nanocellulose, the report
herein describes a method to prepare a robust composite board that is based on microfibrous cellulose, which is a low-cost commercial product. To effectively cross-link wood sawdust and microfibrous cellulose, phosphoric acid-activated glutaraldehyde was used as catalyst. Compared to its uncross-linked
counterpart, the modulus of elasticity and modulus of rupture of the composite board that had been cross-linked by glutaraldehyde and phosphoric acid were significantly strengthened to 3.45±0.06 GPa and 36.5±3.5 MPa, respectively. Moreover, the moisture resistance of the cross-linked
composite board was also enhanced. After soaking in water for 24 h, the mass swelling ratio and thickness swelling ratio of cross-linked composite board had only changed 49% and 21%, respectively. These performances even exceeded that of composite board prepared from nanocellulose. The method
described in this work may have applications in commercial processing and the recycling of wood sawdust.
研究领域:
材料科学
·
林业工程
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2017
·Vol. 5
·期 20
·5010-5017
·
IF 5.256
Kesong Miao,Heng Zhang,Lijuan Sun,Zhengtao Zhu,Li-Juan Fan
With the aim of detecting glutaraldehyde (GA) in wastewater released from hospitals and other sites, fluorescent poly(phenyleneethynylene) with pendant protonated primary amino groups (PPE-NH3+) was synthesized and characterized. The fluorescence of the conjugated polyelectrolyte PPE-NH3+ in aqueous solution changed upon addition of aldehydes. Among many commonly encountered aldehydes including formaldehyde (FA) and glutaraldehyde (GA), GA displayed the strongest quenching of the fluorescence of PPE-NH3+. The quenching efficiency reached above 85% with 1 mM of GA and the limit of detection (LOD) was 0.49 μM. The fluorescence quenching mechanism was discussed. GA, as a dialdehyde, could react with amino groups on different polymer chains simultaneously, and thus might result in more efficient chain aggregation and quenching. Finally, this sensory system was demonstrated to be very effective in detecting GA in real water samples from a water tap in our lab, a pond on the campus, Dushu lake and a river nearby a hospital.
研究领域:
环境科学
·
分析化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Tengfei Pei,Miao Deng,Cai Ma,Hao Yan,Aimei Zhu,Liyi Ye,Qinglin Liu,Qiugen Zhang
Loose nanofiltration (NF) membranes based on the interfacial polymerization (IP) reaction between glutaraldehyde (GA) and amine are developed for dye/salt separation. Branched tris(2-aminoethyl)amine (TETA) and linear hydrazine (HZ) are chose as aqueous amine monomers. Due to the low reactivity of aldehyde and amine under room temperature, plenty of evenly distributional cavities with exposed amine groups form in the matrix, favoring to enhance the membrane permeance, hydrophilicity and dye/salt selectivity. Notably, sodium dodecylsulphate (SDS) is introduced to regulate the monomer diffusion behavior and narrow the reaction zone, facilitating the formation of thin and defect-free skin layer. The resulting GA-TETA/HZ-L membrane shows a high water permeance of 76 LMH bar −1 as well as an excellent dye/salt selectivity (99% rejection for methyl blue (MB) and 4.19% rejection for Na 2 SO 4 ). Furthermore, the membrane shows a good anti-fouling property for bovine serum albumin (BSA), humic acid (HA) and sodium alginate (SA), benefiting from its smooth surface, high hydrophilicity and negative zeta potential. The newly demonstrated SDS-assisted aldehyde-amine IP process provides a novel and facile approach to develop the high-performance loose NF membrane for various fields, especially dye recycle and purification.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
POLYMER COMPOSITES
·
2018
·Vol. 40
·期 3
·1061-1067
·
IF 1.943
Li-Xin Lu,Zhe Wan,Wan-Qiu Lu,Liao Pan,Changfeng Ge
The effect of glutaraldehyde on the properties of polyvinyl alcohol/diethanolamine permselective film was investigated. A new permselective film was prepared by coating low-density polyethylene containing diatomaceous earth. In the coating solution, diethanolamine, glutaraldehyde, and polyvinyl alcohol were used as an amine carrier, a crosslinking agent and a substrate respectively. The effects of the amount of glutaraldehyde on the tensile properties, moisture permeability, thermal stability and the morphologies of permselective film were characterized. The influence of relative humidity on the permeability of permselective film was investigated. The results show that with the increasing amount of glutaraldehyde, the permeability coefficient of CO 2 /O 2 , tensile strength, and thermal stability increase gradually. However, water vapor permeability coefficient and elongation at break of permselective film decrease with the content of glutaraldehyde on the rise. When the content of glutaraldehyde is 0.7%, the selectivity coefficient of CO 2 /O 2 is up to 9.23, and the tensile properties and moisture resistance are also in the high level. Based on the results obtained, it can be concluded that the crosslinked permselective film prepared in this study has good comprehensive properties, and the relative humidity has little influence on the permselective film. POLYM. COMPOS., 40:1061–1067, 2019. © 2018 Society of Plastics Engineers
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2024
·
IF 5.8
Fan Zhang,Meng-hang Gao,Chao-qun Wu,Jing-hui Yang,Nan Zhang,Yong Wang
In today’s electric power systems, biodegradable and environmentally benign dielectric materials with outstanding dielectric capabilities are essential. Here, a hybrid filler MXene@PDA (M@P) was acquired by coating MXene with polydopamine (PDA), and then it was added into cellulose matrix to manufacture regenerated cellulose/M@P (RC/M@P) composite films. Finally, a crosslinking strategy with glutaraldehyde (GA) assistance was developed to further modify the RC/M@P composite films. The crosslinked composite films (CRC/M@P) had a denser structure with fewer defects, considerably decreased dielectric loss, and significantly strengthened breakdown strength. The highest energy storage density of 3.37 J/cm 3 was obtained for CRC/M@P-1 composite film with only 1 wt% M@P at 361.07 MV/m, achieving significant enhancement compared with the original CRC film. Moreover, crosslinking also contributed to the CRC/M@P for achieving better mechanical properties. The excellent comprehensive performances endow CRC/M@P composite films with promising application for the next-generation dielectric capacitors.
研究领域:
材料科学
·
环境科学
·
能源工程
✓ 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）