Article
Materials Science, Paper & Wood
Wang Yu, Chaoyun Wang, Yongjian Yi, Hongying Wang, Yuanru Yang, Liangbin Zeng, Zhijian Tan
Summary: In this study, an acidic deep eutectic solvent (DES) based on choline chloride-oxalic acid dihydrate was used to pretreat raw ramie fibers for direct extraction of nanocellulose without the need for pulping/bleaching processes. The nanocellulose obtained after DES pretreatment exhibited similar properties to degummed fibers, showing high purity, crystallinity, and thermal stability.
Article
Materials Science, Paper & Wood
Guyu Lin, Qi Tang, He Huang, Jianyong Yu, Zhaoling Li, Bin Ding
Summary: Deep eutectic solvents (DESs) are emerging green chemical reagents that are non-toxic, biodegradable, environmentally friendly, and easy to access. This study investigated the optimal extraction conditions and solvent recovery for DESs constituted of choline chloride and urea used in the extraction of ramie cellulose fibers. The results showed that reusable degumming solution could effectively remove non-cellulosic components even after multiple reuse, fulfilling the requirements for spinning process.
Article
Chemistry, Applied
Wei Liu, Haishun Du, Kun Liu, Huayu Liu, Hongxiang Xie, Chuanling Si, Bo Pang, Xinyu Zhang
Summary: Utilizing a green deep eutectic solvent system for the pretreatment of cellulose fibers can achieve high yield and quality of cellulose nanofibrils. The fabrication of cellulose nanopaper through a vacuum filtration process results in high tensile strength and toughness.
CARBOHYDRATE POLYMERS
(2021)
Article
Biochemistry & Molecular Biology
Jin-Chao Yuan, Rui Huang, Ling-Yan Jiang, Guo-Dao Liu, Pan-Dao Liu, Wen-Rong Xu
Summary: A greener and more efficient method for producing cellulose nanofibers (CNFs) from raw plants was developed using an AlCl3-enhanced ternary deep eutectic solvent, DES2. The DES2 treatment effectively removed hemicellulose and lignin, while maintaining a high cellulose content. The resulting CNFs demonstrated superior crystallinity, increased carboxyl content, and a narrower width distribution compared to CNFs obtained from a different solvent.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Polymer Science
Yuanchen Zhu, Jinhui Zhang, Dawei Wang, Zhengjun Shi, Jing Yang, Haiyan Yang
Summary: In this study, bamboo pulp was treated with citric acid-choline chloride deep eutectic solvent to simultaneously fibrillate and esterify it. Higher temperatures and longer treatment times led to increased esterification, resulting in CNFs with a higher carboxyl group content. However, these conditions also led to decreased yields and smaller CNF diameters. The CNFs with higher carboxyl group content showed effective inhibition against E. coli and S. aureus bacteria. Based on comprehensive considerations, treatment at 120 degrees C for 24 h was found to be the optimal condition, resulting in CNFs with a carboxyl group content of 0.31 mmol/g, a diameter of 8 nm, and significant inhibition of E. coli (81.7%) and S. aureus (63.1%). In addition, the CNFs obtained under the optimal condition were found to enhance the tensile strength of polyvinyl alcohol (PVA) films by 74%, making them a favorable additive for composite films.
Article
Biochemistry & Molecular Biology
Ming Yan, Chaochao Tian, Ting Wu, Xingyu Huang, Yidan Zhong, Pei Yang, Lili Zhang, Jinxia Ma, Hailong Lu, Xiaofan Zhou
Summary: The study explores a greener and more inexpensive method for the production of CNFs using a DES system with ChCl and EG, resulting in high yield and thermal stability. The impact of sulfuric acid and water content of DES system on the properties of CNFs is systematically studied, and the influence of dispersed solvents on the preparation and dispersion of CNFs is evaluated using solvatochromic and viscosity parameters.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Agricultural Engineering
He Huang, Qi Tang, Guyu Lin, Yang Liu, Jianyong Yu, Bin Ding, Zhaoling Li
Summary: Adding anthraquinone as a cellulose protection agent in the degumming process of ramie fibers can enhance their properties, including an increase in degree of polymerization, crystallinity, and breaking performance. This new degumming method holds enormous potential for natural fiber extraction.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Chemistry, Applied
Wang Yu, Yongjian Yi, Hongying Wang, Yuanru Yang, Chen Xing, Liangbin Zeng, Juntao Tang, Zhijian Tan
Summary: This study employed various pretreatment methods to prepare cellulose nanofibrils (CNFs) with different pectin composition and content from ramie fibers. The role of residual pectin on the final properties of CNFs was investigated. It was found that the presence of pectin had no significant effect on the size distribution of CNFs, but it led to higher zeta potential value, improved dispersion stability, and enhanced storage modulus of CNF dispersions. The sodium carbonate extraction method showed the greatest impact. The enhanced dispersion stability of CNFs is attributed to the formation of self-assembled hierarchical pectin-hemicellulose/lignin-cellulose nanostructures, which provide electrostatic repulsion and steric hindrance between the nanoparticles.
CARBOHYDRATE POLYMERS
(2022)
Article
Biochemistry & Molecular Biology
Hongzhi Ma, Penglu Fu, Jihua Zhao, Xingxing Lin, Wenyu Wu, Ziqiang Yu, Changlei Xia, Qunhui Wang, Ming Gao, Jun Zhou
Summary: In this study, a deep eutectic solvent (DES) system consisting of chlorine/lactic acid was used to pretreat wheat straw, and it was found that this pretreatment method effectively extracted lignin, retained cellulose, and removed hemicellulose. The best pretreatment condition was 150 degrees C for 6 hours, which resulted in the highest cellulose retention and an enzymatic digestibility of 89.98% for the pretreatment residue. Further characterization of lignin showed that the high yield and purity were attributed to the ether bond cleavage in lignin and the connection between hemicellulose and lignin. The study demonstrated the potential of DES pretreatment for efficient fractionation of lignocellulosic biomass into high-quality cellulose and lignin.
Review
Materials Science, Paper & Wood
Jinquan Tong, Wenchao Hu, Yizheng Qin, Yang Liu
Summary: This paper introduces the advantages of nanocellulose derived from lignocellulose materials, such as high strength, lightweight, biodegradability, and renewability. Due to the complex and dense cell wall structure and poor solubility in water and most solvents, lignocellulose materials are difficult to dissolve directly and utilize effectively in practical production. The pretreatment technology is discussed, which exposes the amorphous areas, eliminates unnecessary non-cellulose components, and facilitates the subsequent applications. Traditional and green solvents used in the pretreatment of lignocellulose materials, as well as their mechanisms, advantages, and disadvantages, are introduced. Furthermore, the mechanism, process, advantages, and potential applications of deep eutectic solvent as a pretreatment solvent are discussed, along with suggestions for the future use of green solvents in treating lignocellulose materials.
Article
Engineering, Chemical
Cuicui Li, Chongxing Huang, Yuan Zhao, Chaojian Zheng, Hongxia Su, Lanyu Zhang, Wanru Luo, Hui Zhao, Shuangfei Wang, Li-Jie Huang
Summary: The study investigated the efficacy of deep eutectic solvents (DESs) in separating lignin, with acidic DESs demonstrating higher solubility than basic DESs. Different DESs showed varying selectivity in separating lignin and hemicellulose from bagasse. Acidic DESs effectively improved the crystallinity of bagasse fiber after pretreatment.
Article
Materials Science, Paper & Wood
Tianyi Lv, Yuyuan Luo, Yuan Chen, Difei Dai, Xin Feng, Hai Chen, Yong Yu, Liang Ma, Yuhao Zhang, Hongjie Dai
Summary: In this study, oxidized cellulose nanofibrils from pineapple peel (PP-TOCNF) were prepared using TEMPO-mediated oxidation and ball milling. The influence of oxidation degree on the structure and properties of PP-TOCNF were investigated, and the potential application in aerogels was explored. The results showed that regulation of oxidation degree effectively adjusted the properties of PP-TOCNF, and TEMPO oxidation improved the stability and shape recovery ability of aerogels in water.
Article
Materials Science, Paper & Wood
Jinsong Zeng, Fugang Hu, Zheng Cheng, Bin Wang, Kefu Chen
Summary: This study investigated and compared the morphology and rheology of cellulose nanofibrils (CNFs) prepared by various mechanical treatment methods. The results showed that CNFs produced by different methods had distinct properties, with RM-CNFs exhibiting superior viscosity and modulus. Overall, the high aspect ratio CNFs showed better rheological performance.
Article
Agricultural Engineering
Guilong Yan, Yuzhen Zhou, Liqin Zhao, Wei Wang, Yuchen Yang, Xinyi Zhao, Ying Chen, Xiaoya Yao
Summary: This study investigates the pretreatment of corncob using a deep eutectic solvent (DES) and evaluates three different recycling procedures. The results show that adding oxalic acid and removing lignin are key factors affecting the efficiency of DES reuse. After ten cycles of recycling, the pretreatment efficiency of the recycled DES does not significantly decrease compared to the original DES pretreatment, and the content of fermentation inhibitors in the enzymatic hydrolysates is not significantly increased.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Agricultural Engineering
He Huang, Qi Tang, Guyu Lin, Chongwen Yu, Hua Wang, Zhaoling Li
Summary: The study found that deep eutectic solvents can efficiently remove gum components from ramie fibers while preserving the cellulose structure intact, resulting in high-quality fibers extraction.
INDUSTRIAL CROPS AND PRODUCTS
(2021)
Article
Engineering, Environmental
Changyong Cai, Huimin Gong, Shuanggen Wu, Fenfang Li, Song Liu, Zhijian Tan, Shengyi Dong
Summary: A supramolecular approach was used to create adhesive materials with excellent temperature resistance and strong adhesion capacity by combining molecular recognition and supramolecular polymerization. The resulting poly(A-C) showed tough adhesion effects at high and low temperatures without any additives. A customized device allowed for real-time monitoring of the adhesion behavior, as well as visualizing and wirelessly alarming adhesion failure.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Applied
Jincui Chen, Yuan Xu, Zhijian Tan
Summary: This study employed CO2-triggered switchable hydrophilicity solvents (SHSs) in ultrasonic-assisted extraction to extract Polygonatum sibiricum polysaccharides (PSPs). The solvents became hydrophilic in the presence of CO2, allowing for extraction of PSPs. Upon removal of CO2, the solvents switched to hydrophobicity, separating the extractants from the extract for recycling. Factors affecting PSPs extraction were investigated, and optimal extraction conditions were determined. The SHSs exhibited high recovery rates after multiple cycles and the characteristics of the extracted PSPs were analyzed. This study presents a novel strategy for sustainable extraction of plant polysaccharides and other bioactive ingredients.
Article
Food Science & Technology
Zhe Xu, Shiying Han, Hui Chen, Lingyu Han, Xiufang Dong, Maolin Tu, Zhijian Tan, Ming Du, Tingting Li
Summary: This study investigated the bioactive peptides derived from Larimichthys crocea proteins and their potential benefits for bone growth. The protein hydrolysates treated with pepsin for 1 hour and 2 hours showed higher osteogenic activity in vitro. Two identified peptides, IERGDVVVQDSPSD and RGDLGIEIPTEK, were found to promote osteoblast proliferation and enhance ALP activity. Additionally, the molecular weight distribution and free amino acid composition of the proteins were determined. These peptides also exhibited stronger interaction with RGD than integrins, suggesting their potential as effective ingredients for promoting bone growth in the future.
FOOD RESEARCH INTERNATIONAL
(2023)
Article
Chemistry, Applied
Xueying Chen, Runping Wang, Zhijian Tan
Summary: In this study, a pH-switchable deep eutectic solvent (DES) was used as a recyclable alternative to t-butanol in three-phase partitioning (TPP) for extracting and purifying grape seed polysaccharides (GSP). The DES-based extraction achieved a maximum yield of 98.04 mg/g under optimal conditions. The DES can be recycled with only a small loss in extraction yield after 25 cycles, and the extractability of DES can be completely recovered after switching and regeneration. The obtained GSP had a molecular weight of 60 kDa, and its main monosaccharides included mannose, glucose, galactose, and arabinose. This study provides an efficient and sustainable method for the extraction of bioactive substances.
Article
Chemistry, Physical
Yicong Wang, Shanshan Wang, Zongkui Qin, Tian Lei, Leilei Liu, Zhijian Tan
Summary: A lower critical solution temperature responsive ionic liquid (IL) was synthesized for the extraction of geniposide acid (GPA) from Eucommia ulmoides Male flowers. The IL showed temperature-dependent properties and had good reusability. Molecular dynamics simulation revealed the underlying mechanism of the extraction process. These findings contribute to the development and application of similar ILs for natural product extraction.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Nanoscience & Nanotechnology
Qianwen Lu, Hengfeng Li, Zhijian Tan
Summary: Ionicconductive eutectogels have great potential in wearable strain sensors due to their temperature tolerance, simplicity, and low cost. In this study, zwitterionic eutectogels were prepared using zwitterionic deep eutectic solvents. These eutectogels exhibited excellent ionic conductivity, stretchability, self-healing, self-adhesion, and temperature tolerance. They were successfully used in wearable self-adhesive strain sensors, showing high sensitivity and cyclic stability over a wide temperature range. The findings pave the way for the design of versatile and environmentally adaptive soft materials.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Biochemistry & Molecular Biology
Liru Luo, Wang Yu, Yongjian Yi, Chen Xing, Liangbin Zeng, Yuanru Yang, Hongying Wang, Zhonghai Tang, Zhijian Tan
Summary: In this study, cellulose nanofibril (CNF) films were prepared from ramie fibers with varying pectin compositions and contents, and the impact of residual pectin on the overall performance of CNF films was assessed. The residual pectin composition did not significantly affect the properties of the CNF films obtained. However, increasing the content of residual pectin led to an increase in surface area and water absorption of the CNF films, while decreasing the content resulted in higher UVA light transmittance and tensile strength. This research provides guidance for the preparation of CNF films with different performance requirements.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Chemistry, Physical
Zhonghai Tang, Yuan Xu, Changyong Cai, Zhijian Tan
Summary: In this study, temperature-switchable deep eutectic solvents (TS-DESs) were prepared and used as recyclable extractants for extracting Lycium barbarum polysaccharides (LBP). The TS-DESs showed temperature-responsive characteristics, enabling the extraction below their LCST and recovery above their LCST. The maximal extraction yield obtained was 465 mg/g, and the TS-DES exhibited a recovery rate of 80.2% after five cyclic tests. This study provides a novel method for polysaccharide extraction and offers guidance for the extraction of bioactive compounds using recyclable extractants.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Analytical
Xueying Chen, Yuxiao Hu, Zhijian Tan
Summary: The traditional three-phase partitioning (TPP) systems used for extracting and purifying bioactive substances have environmental pollution issues due to the use of volatile and flammable organic solvents and high-concentration inorganic salts. In this study, an innovative TPP based on deep eutectic solvents (DESs) and sugars was used to extract and preliminarily purify cucumber peroxidase (POD), achieving high enzyme recovery and purification fold. The DESs were found to be recyclable and the TPP system showed great potential in the enzymes and proteins separation field.
MICROCHEMICAL JOURNAL
(2023)
Article
Chemistry, Analytical
Min He, Xinyue Yang, Yaping Li, Xuhuai Luo, Zhijian Tan, Sifan Luo
Summary: In this study, an image similarity strategy based on targeted filtration was developed to comprehensively evaluate Chinese patent medicines. The volatile oil fraction of Chaihu Shugan Wan (CSW) was analyzed using headspace-solid phase micro-extraction (HS-SPME) and comprehensive two-dimensional gas chromatography (HS-SPME-GC x GC). Multi-component spectral correlative chromatography (MSCC) was used to distinguish inter-group and intra-group differences. Zone-specific ion filtration was applied to select 50 contours indicating different medicinal materials in the 2D fingerprints. The pairwise similarities of the simplified fingerprints were estimated using the SURF-FLANN algorithm. The similarities of six sample fingerprints were successfully scored. Overall, the image similarity strategy based on zone-specific ion filtration provides a viable solution for rapidly evaluating 2D fingerprints of extract fractions from Chinese patent medicines.
MICROCHEMICAL JOURNAL
(2023)
Article
Engineering, Chemical
Yuxiao Hu, Xueying Chen, Zhijian Tan
Summary: In this study, a novel three-phase partitioning (TPP) method was developed using pH-responsive deep eutectic solvents (DESs) and sugars as substitutes for t-butanol and ammonium sulfate. The method was applied to the separation and purification of radish peroxidase (POD). The optimized conditions resulted in high POD recovery rate and purification fold. The method showed better purification efficiency compared to traditional TPP methods, and it does not require the use of organic solvents and high concentration salt solutions.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Shuanggen Wu, Changyong Cai, Xunqiu Wang, Qiao Zhang, Zhijian Tan, Fenfang Li, Shengyi Dong
Summary: Understanding the nature of glass is a significant challenge in the fields of chemistry, physics, and materials science. This study fabricated transparent supramolecular glasses and revealed the role of hydrogen bonding in glass formation. Various relaxations were observed at different temperatures, offering insights into the nature of glass materials.
MATERIALS HORIZONS
(2023)
Article
Chemistry, Multidisciplinary
Shuanggen Wu, Changyong Cai, Xunqiu Wang, Qiao Zhang, Zhijian Tan, Fenfang Li, Shengyi Dong
Summary: Understanding the nature of glass is a significant challenge in the fields of chemistry, physics, and materials science. This study focused on the fabrication of bulk supramolecular glasses to investigate the properties of glass. Hydrogen bonding played a crucial role in the formation of these glasses, with its directional and saturated character enabling the creation of short-range ordered structures that connected into long-range disordered networks.
MATERIALS HORIZONS
(2023)
Article
Chemistry, Applied
Shanshan Wang, Tian Lei, Leilei Liu, Zhijian Tan
Summary: This study focuses on the extraction of hesperidin using CO2-responsive deep eutectic solvents (DES), which results in higher extraction yield compared to traditional methanol extraction. The study suggests that hydrogen and π-π bonds are the main factors affecting hesperidin extraction.
