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Li J, Shi X, Qin X, Liu M, Wang Q, Zhong J. Improved lipase performance by covalent immobilization of Candida antarctica lipase B on amino acid modified microcrystalline cellulose as green renewable support. Colloids Surf B Biointerfaces 2024; 235:113764. [PMID: 38301428 DOI: 10.1016/j.colsurfb.2024.113764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Revised: 01/19/2024] [Accepted: 01/20/2024] [Indexed: 02/03/2024]
Abstract
Development of immobilized lipase with excellent catalytic performance and low cost is the major challenge for large-scale industrial applications. In this study, green renewable microcrystalline cellulose (MCC) that was hydrophobically modified with D-alanine (Ala) or L-lysine (Lys) was used for immobilizing Candida antarctica lipase B (CALB). The improved catalytic properties were investigated by experimental and computational methods. CALB immobilized on MCC-Ala with higher hydrophobicity showed better catalytic activity than CALB@MCC-Lys because the increased flexibility of the lid region of CALB@MCC-Ala favored the formation of open conformation. Additionally, the low root mean square deviation and the high β-sheet and α-helix contents of CALB@MCC-Ala indicated that the structure became more stable, leading to a significantly enhanced stability (54.80% and 90.90% relative activity at 70 °C and pH 9.0, respectively) and good reusability (48.92% activity after 5 cycles). This study provides a promising avenue to develop immobilized lipase with high catalytic properties for industry applications.
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Affiliation(s)
- Jingwen Li
- College of Food Science, Southwest University, Chongqing 400715, China
| | - Xue Shi
- College of Food Science, Southwest University, Chongqing 400715, China
| | - Xiaoli Qin
- College of Food Science, Southwest University, Chongqing 400715, China
| | - Min Liu
- College of Food Science, Southwest University, Chongqing 400715, China
| | - Qiang Wang
- College of Biological and Chemical Engineering, Chongqing University of Education, Chongqing 400067, China.
| | - Jinfeng Zhong
- College of Food Science, Southwest University, Chongqing 400715, China; Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and Chongqing, Chongqing 400715, China.
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Chen J, Frempong KEB, Ding P, He G, Zhou Y, Kuang M, Wei Y, Zhou J. Plant polyphenol surfactant construction with strong surface activity and chelation properties as efficient decontamination of UO 22+ on cotton fabric. Int J Biol Macromol 2024; 254:127451. [PMID: 37871720 DOI: 10.1016/j.ijbiomac.2023.127451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 09/30/2023] [Accepted: 10/13/2023] [Indexed: 10/25/2023]
Abstract
Chemically synthesized surfactants have promising applications in the treatment of uranium, however, their hazardous environmental effects, non-biodegradability, and numerous drawbacks prevent them from being widely used in practice. Herein, we successfully synthesized a green chelating and foaming integrated surfactant (BTBS) by Mannich reaction and acylation of bayberry tannin for the effective removal of UO22+ from aqueous environments or solid surfaces. The as-prepared surfactant was systematically characterized by FT-IR, showing that the hydrophobic groups were successfully grafted onto tannin. The modified material showed better foaming and emulsifying properties, which proved this method could improve the amphiphilicity of tannin. Moreover, for the first time, a foam fractionation method in conjunction with a tannin-based surfactant was applied for UO22+ removal from water. This surfactant was used as a co-surfactant and could readily remove 90 % of UO22+ (20 mg L-1) from water. The removal of UO22+ could be completed in a short time (30 min), and the maximum adsorption capacity was determined as 175.9 mg g-1. This surfactant can also be used for efficient decontamination of uranium-contaminated cotton cloth with a high removal rate of 94.55 %. In addition, the mechanism studies show that the adsorption of BTBS for UO22+ can be mainly attributed to a chelating mechanism between UO22+ and the adjacent phenolic hydroxyls. The novel biomass-derived BTBS with advantages such as high capture capacity, environmental friendliness, and cost-effectiveness suggests that it plays an important role in the remediation of radionuclide pollution.
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Affiliation(s)
- Jialang Chen
- Engineering Research Center of Biomass Materials, Ministry of Education, School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan 621010, PR China
| | - Kwame Eduam Baiden Frempong
- Engineering Research Center of Biomass Materials, Ministry of Education, School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan 621010, PR China
| | - Pingping Ding
- The Collelge of Nuclear Technology and Automation Engineering, Chengdu University of Technology, Chengdu, Sichuan 610059, PR China
| | - Guiqiang He
- Engineering Research Center of Biomass Materials, Ministry of Education, School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan 621010, PR China
| | - Yan Zhou
- Mianyang Central Hospital, NHC Key Laboratory of Nuclear Technology Medical Transformation, Mianyang, Sichuan 621000, PR China
| | - Meng Kuang
- Institute of Cotton Research of Chinese Academy of Agricultural Sciences, National Key Laboratory of Cotton Bio-breeding and Integrated Utilization, Anyang, Henan 455000, PR China
| | - Yanxia Wei
- Engineering Research Center of Biomass Materials, Ministry of Education, School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan 621010, PR China.
| | - Jian Zhou
- Engineering Research Center of Biomass Materials, Ministry of Education, School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan 621010, PR China.
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Duan Q, Bao X, Yu L, Cui F, Zahid N, Liu F, Zhu J, Liu H. Study on hydroxypropyl corn starch/alkyl ketene dimer composite film with enhanced water resistance and mechanical properties. Int J Biol Macromol 2023; 253:126613. [PMID: 37652333 DOI: 10.1016/j.ijbiomac.2023.126613] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 08/24/2023] [Accepted: 08/28/2023] [Indexed: 09/02/2023]
Abstract
This study aimed to address the limited applicability of starch-based films in food packaging due to their inherent hydrophilicity, by developing a highly hydrophobic and mechanically reinforced film through compositing with alkyl ketene dimer (AKD). The FTIR analysis confirmed the successful introduction of AKD into the starch backbone via esterification by forming a β-keto ester linkage. Notably, the incorporation of AKD resulted in significant improvements in the modified film (S80A20), by exhibiting a higher water contact angle (WCA) of 128.28° and a reduced water vapor permeability (WVP) to 0.81×10-10 (g m/m2 s Pa). These enhancements were attributed to the inherent low surface energy of AKD and the increased surface roughness caused by AKD recrystallization. Moreover, the mechanical properties of the films were also enhanced due to the chemical crosslinking and intermolecular hydrogen bonding, as supported by the results of relaxation temperatures and molecular dynamics simulations. Considering the environmentally friendly and biodegradable nature of all components, the prepared hydrophobic films will hopefully be applied in food packaging.
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Affiliation(s)
- Qingfei Duan
- School of Food Science and Engineering, South China University of Technology, Guangzhou, China
| | - Xianyang Bao
- School of Food Science and Engineering, South China University of Technology, Guangzhou, China; John A. Paulson School of Engineering and Applied Science, Kavli Institute for Nanobio Science and Technology, Harvard University, Cambridge, USA
| | - Long Yu
- School of Food Science and Engineering, South China University of Technology, Guangzhou, China; Overseas Expertise Introduction Center for Discipline Innovation of Food Nutrition and Human Health, Guangzhou, China
| | - Feihe Cui
- School of Food Science and Engineering, South China University of Technology, Guangzhou, China
| | - Nisha Zahid
- University of Agriculture, Faisalabad, Pakistan
| | - Fengsong Liu
- School of Food Science and Engineering, South China University of Technology, Guangzhou, China
| | - Jian Zhu
- School of Food Science and Engineering, South China University of Technology, Guangzhou, China.
| | - Hongsheng Liu
- School of Food Science and Engineering, South China University of Technology, Guangzhou, China; Overseas Expertise Introduction Center for Discipline Innovation of Food Nutrition and Human Health, Guangzhou, China.
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Teng R, Sun J, Nie Y, Li A, Liu X, Sun W, An B, Ma C, Liu S, Li W. An ultra-thin and highly efficient electromagnetic interference shielding composite paper with hydrophobic and antibacterial properties. Int J Biol Macromol 2023; 253:127510. [PMID: 37865363 DOI: 10.1016/j.ijbiomac.2023.127510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 09/04/2023] [Accepted: 10/07/2023] [Indexed: 10/23/2023]
Abstract
Facing the increasing electromagnetic interference (EMI) pollution in the living environment, it is a new trend to explore an efficient EMI shielding material with facile fabrication and a wide range of application scenarios. A hydrophobic composite paper composed of silver nanowires (AgNWs) and kapok microfibers cellulose (MFC) was modified by methyl trimethoxy silane (MTMS) through a simple method. As a result, the composite paper has a good EMI shielding effectiveness (EMI SE) of 61.7 dB with electrical conductivity of 695.41 S/cm. The modification of MTMS improved the thermal stability performance of composite paper, which also increased its water contact angle to 113°. The free silver ions (Ag+) released from AgNWs can kill surrounding microbial bacteria, endowing the composite paper with good antibacterial property. Water resistance and antibacterial property enable MTMS/AgNWs/MFC composite paper to cope with complex application environments.
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Affiliation(s)
- Rui Teng
- College of Materials Science and Engineering, Northeast Forestry University, Harbin 150040, China; Key Laboratory of Bio-based Material Science and Technology of the Ministry of Education, Northeast Forestry University, Harbin 150040, China
| | - Jiaming Sun
- College of Materials Science and Engineering, Northeast Forestry University, Harbin 150040, China; Key Laboratory of Bio-based Material Science and Technology of the Ministry of Education, Northeast Forestry University, Harbin 150040, China
| | - Yuxia Nie
- College of Materials Science and Engineering, Northeast Forestry University, Harbin 150040, China
| | - Anqi Li
- College of Materials Science and Engineering, Northeast Forestry University, Harbin 150040, China
| | - Xue Liu
- College of Materials Science and Engineering, Northeast Forestry University, Harbin 150040, China; Key Laboratory of Bio-based Material Science and Technology of the Ministry of Education, Northeast Forestry University, Harbin 150040, China
| | - Wenye Sun
- College of Materials Science and Engineering, Northeast Forestry University, Harbin 150040, China; Key Laboratory of Bio-based Material Science and Technology of the Ministry of Education, Northeast Forestry University, Harbin 150040, China
| | - Bang An
- College of Materials Science and Engineering, Northeast Forestry University, Harbin 150040, China; Key Laboratory of Bio-based Material Science and Technology of the Ministry of Education, Northeast Forestry University, Harbin 150040, China
| | - Chunhui Ma
- College of Materials Science and Engineering, Northeast Forestry University, Harbin 150040, China; Key Laboratory of Bio-based Material Science and Technology of the Ministry of Education, Northeast Forestry University, Harbin 150040, China
| | - Shouxin Liu
- College of Materials Science and Engineering, Northeast Forestry University, Harbin 150040, China; Key Laboratory of Bio-based Material Science and Technology of the Ministry of Education, Northeast Forestry University, Harbin 150040, China.
| | - Wei Li
- College of Materials Science and Engineering, Northeast Forestry University, Harbin 150040, China; Key Laboratory of Bio-based Material Science and Technology of the Ministry of Education, Northeast Forestry University, Harbin 150040, China.
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Li Z, Feng X, Luo S, Ding Y, Zhang Z, Shang Y, Lei D, Cai J, Zhao J, Zheng L, Gao M. High drug loading hydrophobic cross-linked dextran microspheres as novel drug delivery systems for the treatment of osteoarthritis. Asian J Pharm Sci 2023; 18:100830. [PMID: 37588991 PMCID: PMC10425896 DOI: 10.1016/j.ajps.2023.100830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 07/03/2023] [Accepted: 07/06/2023] [Indexed: 08/18/2023] Open
Abstract
Drug delivery via intra-articular (IA) injection has proved to be effective in osteoarthritis (OA) therapy, limited by the drug efficiency and short retention time of the drug delivery systems (DDSs). Herein, a series of modified cross-linked dextran (Sephadex, S0) was fabricated by respectively grafting with linear alkyl chains, branched alkyl chains or aromatic chain, and acted as DDSs after ibuprofen (Ibu) loading for OA therapy. This DDSs expressed sustained drug release, excellent anti-inflammatory and chondroprotective effects both in IL-1β induced chondrocytes and OA joints. Specifically, the introduction of a longer hydrophobic chain, particularly an aromatic chain, distinctly improved the hydrophobicity of S0, increased Ibu loading efficiency, and further led to significantly improving OA therapeutic effects. Therefore, hydrophobic microspheres with greatly improved drug loading ratio and prolonged degradation rates show great potential to act as DDSs for OA therapy.
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Affiliation(s)
- Zhimin Li
- Guangxi Engineering Center in Biomedical Materials for Tissue and Organ Regeneration, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China
- Collaborative Innovation Centre of Regenerative Medicine and Medical BioResource Development and Application Co- constructed by the Province and Ministry, Guangxi Medical University, Nanning 530021, China
- Department of Spine and Osteopathic Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China
| | - Xianjing Feng
- Guangxi Engineering Center in Biomedical Materials for Tissue and Organ Regeneration, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China
- Collaborative Innovation Centre of Regenerative Medicine and Medical BioResource Development and Application Co- constructed by the Province and Ministry, Guangxi Medical University, Nanning 530021, China
| | - Shixing Luo
- Collaborative Innovation Centre of Regenerative Medicine and Medical BioResource Development and Application Co- constructed by the Province and Ministry, Guangxi Medical University, Nanning 530021, China
- Department of Orthopedics, The Ninth Affiliated Hospital of Guangxi Medical University, Beihai, Guangxi 536000, China
| | - Yanfeng Ding
- Guangxi Engineering Center in Biomedical Materials for Tissue and Organ Regeneration, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China
- Collaborative Innovation Centre of Regenerative Medicine and Medical BioResource Development and Application Co- constructed by the Province and Ministry, Guangxi Medical University, Nanning 530021, China
- Department of Spine and Osteopathic Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China
| | - Zhi Zhang
- Guangxi Engineering Center in Biomedical Materials for Tissue and Organ Regeneration, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China
- Collaborative Innovation Centre of Regenerative Medicine and Medical BioResource Development and Application Co- constructed by the Province and Ministry, Guangxi Medical University, Nanning 530021, China
- Department of Orthopaedics Trauma and Hand Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China
| | - Yifeng Shang
- Guangxi Engineering Center in Biomedical Materials for Tissue and Organ Regeneration, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China
- Collaborative Innovation Centre of Regenerative Medicine and Medical BioResource Development and Application Co- constructed by the Province and Ministry, Guangxi Medical University, Nanning 530021, China
| | - Doudou Lei
- Guangxi Engineering Center in Biomedical Materials for Tissue and Organ Regeneration, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China
- Collaborative Innovation Centre of Regenerative Medicine and Medical BioResource Development and Application Co- constructed by the Province and Ministry, Guangxi Medical University, Nanning 530021, China
| | - Jinhong Cai
- Guangxi Engineering Center in Biomedical Materials for Tissue and Organ Regeneration, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China
- Collaborative Innovation Centre of Regenerative Medicine and Medical BioResource Development and Application Co- constructed by the Province and Ministry, Guangxi Medical University, Nanning 530021, China
| | - Jinmin Zhao
- Guangxi Engineering Center in Biomedical Materials for Tissue and Organ Regeneration, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China
- Collaborative Innovation Centre of Regenerative Medicine and Medical BioResource Development and Application Co- constructed by the Province and Ministry, Guangxi Medical University, Nanning 530021, China
- Department of Orthopaedics Trauma and Hand Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China
- Guangxi Key Laboratory of Regenerative Medicine, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China
| | - Li Zheng
- Guangxi Engineering Center in Biomedical Materials for Tissue and Organ Regeneration, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China
- Collaborative Innovation Centre of Regenerative Medicine and Medical BioResource Development and Application Co- constructed by the Province and Ministry, Guangxi Medical University, Nanning 530021, China
- Guangxi Key Laboratory of Regenerative Medicine, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China
| | - Ming Gao
- Guangxi Engineering Center in Biomedical Materials for Tissue and Organ Regeneration, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China
- Collaborative Innovation Centre of Regenerative Medicine and Medical BioResource Development and Application Co- constructed by the Province and Ministry, Guangxi Medical University, Nanning 530021, China
- Guangxi Key Laboratory of Regenerative Medicine, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China
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Liu X, Hao Z, Yu R, Zhang X, Zhang Y, Zhang Y. Enhanced hydrophobic ZSM-5 with high capacity for toluene capture under high-humidity conditions. Sci Total Environ 2023:164919. [PMID: 37343869 DOI: 10.1016/j.scitotenv.2023.164919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 05/31/2023] [Accepted: 06/13/2023] [Indexed: 06/23/2023]
Abstract
Industrial volatile organic compounds (VOCs) have the characteristics of large displacement and high humidity. The problem of water resistance of the adsorbent in treating VOCs by adsorption method under high humidity conditions needs to be solved urgently. Herein, methyl triethoxysilane (CH3Si(C2H5O)3) and methyl trimethoxysilane (CH3Si(CH3O)3) are used for hydrophobic modification of ZSM-5, and its adsorption properties for toluene are studied under high-humidity conditions. Fourier infrared spectroscopy and X-ray photoelectron spectroscopy indicate that the hydrophobic groups -CH3 and -CH2- are successfully grafted onto the surface of the ZSM-5. The adsorption-desorption results of toluene show that the hydrophobicity of the modified ZSM-5 is remarkably improved, and the adsorption capacity for toluene is almost 6.5 times higher than that of original ZSM-5 at 80 % relative humidity. The mechanism of surface hydrophobicity modification of ZSM-5 was further investigated and found that the silicone hydroxyl group on the surface of the material reacted with the modifier to graft the hydrophobic group onto the surface of the material, which improved the hydrophobic property of the material. Moreover, the universality of the hydrophobic modification method has been proved feasible in commercial ZSM-5. Therefore, this work provides an important theory and reference for improving the hydrophobic properties of ZSM-5 molecular sieve.
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Affiliation(s)
- Xingyuan Liu
- College of Chemical Engineering, Inner Mongolia University of Technology, Hohhot 010051, China; Inner Mongolia Key Laboratory of Efficient Cyclic Utilization of Coal-Based Solid Waste, Hohhot 010051, China; Key Laboratory of Resource Circulation at Universities of Inner Mongolia Autonomous Region, Hohhot 010051, China
| | - Zhifei Hao
- College of Chemical Engineering, Inner Mongolia University of Technology, Hohhot 010051, China; Inner Mongolia Key Laboratory of Efficient Cyclic Utilization of Coal-Based Solid Waste, Hohhot 010051, China; Key Laboratory of Resource Circulation at Universities of Inner Mongolia Autonomous Region, Hohhot 010051, China.
| | - Ruyin Yu
- College of Chemical Engineering, Inner Mongolia University of Technology, Hohhot 010051, China; Inner Mongolia Key Laboratory of Efficient Cyclic Utilization of Coal-Based Solid Waste, Hohhot 010051, China; Key Laboratory of Resource Circulation at Universities of Inner Mongolia Autonomous Region, Hohhot 010051, China
| | - Xiaowei Zhang
- College of Chemical Engineering, Inner Mongolia University of Technology, Hohhot 010051, China; Inner Mongolia Key Laboratory of Efficient Cyclic Utilization of Coal-Based Solid Waste, Hohhot 010051, China; Key Laboratory of Resource Circulation at Universities of Inner Mongolia Autonomous Region, Hohhot 010051, China
| | - Yinmin Zhang
- College of Chemical Engineering, Inner Mongolia University of Technology, Hohhot 010051, China; Inner Mongolia Key Laboratory of Efficient Cyclic Utilization of Coal-Based Solid Waste, Hohhot 010051, China; Key Laboratory of Resource Circulation at Universities of Inner Mongolia Autonomous Region, Hohhot 010051, China
| | - Yongfeng Zhang
- College of Chemical Engineering, Inner Mongolia University of Technology, Hohhot 010051, China; Inner Mongolia Key Laboratory of Efficient Cyclic Utilization of Coal-Based Solid Waste, Hohhot 010051, China; Key Laboratory of Resource Circulation at Universities of Inner Mongolia Autonomous Region, Hohhot 010051, China.
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Zhang L, Xiao Q, Xiao Z, Zhang Y, Weng H, Chen F, Xiao A. Hydrophobic modified agar: Structural characterization and application in encapsulation and release of curcumin. Carbohydr Polym 2023; 308:120644. [PMID: 36813337 DOI: 10.1016/j.carbpol.2023.120644] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 01/26/2023] [Accepted: 01/29/2023] [Indexed: 02/05/2023]
Abstract
In this study, three kinds of anhydrides with different structures were introduced into agar molecules to study the effects of varying degrees of substitution (DS) and anhydride structures on the physicochemical properties and curcumin (CUR) loading capacity. Increasing the carbon chain length and saturation of the anhydride affects the hydrophobic interaction and hydrogen bonding of the esterified agar, thereby changing the stable structure of the agar. Although the gel performance declined, the hydrophilic carboxyl group and the loose porous structure provide more binding sites for the adsorption of water molecules, hence providing excellent water retention (1700 %). Next, CUR was used as a hydrophobic active ingredient to study agar microspheres' drug encapsulation and in vitro release ability. Results showed that the excellent swelling and hydrophobic structure of esterified agar could promote the encapsulation of CUR (70.3 %). The release process is controlled by pH, and the release of CUR under weak alkaline conditions is significant, which can be explained by the pore structure, swelling characteristics, and carboxyl binding of agar. Therefore, this study shows the application potential of hydrogel microspheres in loading hydrophobic active ingredients and sustained release and provides the possibility for the application of agar in drug delivery systems.
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Affiliation(s)
- Luyao Zhang
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China; National R&D Center for Red Alga Processing Technology, Xiamen 361021, China; Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China
| | - Qiong Xiao
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China; National R&D Center for Red Alga Processing Technology, Xiamen 361021, China; Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China
| | - Zhechen Xiao
- College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Yonghui Zhang
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China; National R&D Center for Red Alga Processing Technology, Xiamen 361021, China; Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China
| | - Huifen Weng
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China; National R&D Center for Red Alga Processing Technology, Xiamen 361021, China; Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China
| | - Fuquan Chen
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China; National R&D Center for Red Alga Processing Technology, Xiamen 361021, China; Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China.
| | - Anfeng Xiao
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China; National R&D Center for Red Alga Processing Technology, Xiamen 361021, China; Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China.
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8
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Yu X, Wei Y, Qi W, Wang M. Catalytic metal-organic framework-melamine foam composite as an efficient material for the elimination of organic pollutants. Environ Sci Pollut Res Int 2023. [PMID: 36689117 DOI: 10.1007/s11356-023-25441-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Accepted: 01/14/2023] [Indexed: 01/24/2023]
Abstract
Water-insoluble organic pollutants in environment, such as sea oil spill, industrial reagents, and the abused organic pesticides, bring great risks to global water systems, which thus requires effective approaches for organic pollutant elimination. In this study, we report a catalytic metal-organic framework (MOF)-melamine foam (MF) composite material (DDT-UiO-66-NH2@MF) showing excellent oil-water separation performance and enzyme-like degradation ability toward organophosphorus pesticides. The fabrication of DDT-UiO-66-NH2@MF is based on the immobilization of a MOF-derived nanozyme (UiO-66-NH2) on MF sponge, and followed by the hydrophobic modification of UiO-66-NH2 by 1-dodecanethiol (DDT). The obtained DDT-UiO-66-NH2@MF thus displayed superhydrophobic/superhydrophilic property with a high water contact angle (WCA = 144.6°) and specific adsorption capacity toward various oils/organic solvents (62.2-119.8 g/g), which leads to a continuous oil-water separation on a simple device. In the meanwhile, owing to the enzyme-like property of UiO-66-NH2, DDT-UiO-66-NH2@MF also displayed good ability to hydrolyze paraoxon under mild conditions, which facilitates the elimination of toxic pesticide residuals in water systems. This work provides a simple, efficient, and green approach for the separation and treatment of water-insoluble organic pollutants, as well as expands the use of MOFs-MF sponge composite materials in environmental sustainability.
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Pan W, Liang Q, Gao Q. Preparation of hydroxypropyl starch/polyvinyl alcohol composite nanofibers films and improvement of hydrophobic properties. Int J Biol Macromol 2022; 223:1297-1307. [PMID: 36395934 DOI: 10.1016/j.ijbiomac.2022.11.114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2022] [Revised: 10/19/2022] [Accepted: 11/11/2022] [Indexed: 11/16/2022]
Abstract
Starch-derived edible films have great potential as biodegradable food packaging and biomedical materials, in this study, we adopted a green method to prepare starch-based composite electrospun nanofibers films. The hydroxypropyl starches (HPS) were prepared to improve native starch solubility and properties, and a series of blend solutions were prepared with different HPS/polyvinyl alcohol (PVA) weight ratios. The comparison of the properties of HPS/PVA (HPA) nanofibers with different amylose contents were evaluated, and the fibers fabricated from hydroxypropyl high amylose starch (HP-HAS) had more continuous and homogeneous morphologies compared to the other starch fibers, it was also found that the addition of HP-HAS in the film has better mechanical properties than pure PVA film. Thus, to improve the hydrophobicity of the film, the HP-HAS/PVA (HPA(H)) nanofiber was selected for the hydrophobic study by the citric acid (CA) treatment. The hydrophobic surface was formed on the HPA(H) film by CA self-assembled coating with a water contact angle changed from 30.95° up to 100.74°. This study successfully prepared the modified starch/PVA composite nanofibers and established a simple method of self-assembled hydrophobic modification to improve water stability. Therefore, this green strategy is an alternative candidate in further study for food packaging and relative areas.
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Affiliation(s)
- Wenli Pan
- Carbohydrate Laboratory, School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, PR China; Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, Guangzhou 510640, PR China
| | - Qian Liang
- Carbohydrate Laboratory, School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, PR China; Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, Guangzhou 510640, PR China
| | - Qunyu Gao
- Carbohydrate Laboratory, School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, PR China; Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, Guangzhou 510640, PR China.
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10
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Dan H, Ji K, Gao Y, Yin W, Gao B, Yue Q. Fabrication of superhydrophobic Enteromorpha-derived carbon aerogels via NH 4H 2PO 4 modification for multi-behavioral oil/water separation. Sci Total Environ 2022; 837:155869. [PMID: 35561933 DOI: 10.1016/j.scitotenv.2022.155869] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 05/05/2022] [Accepted: 05/07/2022] [Indexed: 06/15/2023]
Abstract
Hydrophobic and oleophilic biomass-based block materials are considered to be highly promising candidates used for oil/water separation. However, the crucial hydrophobic modification process often involves various toxic and hazardous organic substances or requires high energy inputs. Inspired by the flame retardant principle of phosphorus-containing flame retardants, herein, an Enteromorpha-derived carbon (ADP-EP) aerogel with a water contact angle of 144.2° was prepared by successive freeze-shaping, freeze-drying and low-temperature carbonization treatment (300 °C), using NH4H2PO4 (ADP) as a modifier. The results demonstrated that the introduction of NH4H2PO4 could largely facilitate the removal of oxygenated groups from the pristine EP aerogels and enhance their surface roughness, thereby achieving surface hydrophobic modification. Featuring intrinsic low density, rich porosity and strong lipophilicity, the as-fabricated ADP-EP aerogels exhibited exceptional performance in both oil spill adsorption (~140 g/g) and water-in-oil emulsion separation. Moreover, the good reusability for oil uptake was also realized thanks to its robust mechanical compressibility and thermal stability. This work provides a facile, economical and eco-friendly route to obtain a desirable hydrophobic/oleophilic surface.
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Affiliation(s)
- Hongbing Dan
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China
| | - Kaidi Ji
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China
| | - Yue Gao
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China.
| | - Weiyan Yin
- Hubei Key Laboratory of Biomass Fibers and Eco-dyeing & Finishing, School of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430073, China
| | - Baoyu Gao
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China
| | - Qinyan Yue
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China
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11
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Shi X, Qin X, Dai Y, Liu X, Wang W, Zhong J. Improved catalytic properties of Candida antarctica lipase B immobilized on cetyl chloroformate-modified cellulose nanocrystals. Int J Biol Macromol 2022; 220:1231-1240. [PMID: 36049567 DOI: 10.1016/j.ijbiomac.2022.08.170] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2022] [Revised: 08/19/2022] [Accepted: 08/24/2022] [Indexed: 11/05/2022]
Abstract
The catalytic activity of Candida antarctica lipase B (CALB) immobilized on modified cellulose nanocrystals (CNC) with different hydrophobicity was investigated using experimental and theoretical approaches. Firstly, the modified CNC were characterized by multi-spectroscopic methods, water contact angle, scanning electron microscopy and thermogravimetric analysis. Moderately hydrophobic CNC were found to be an optimal support for CALB immobilization. Secondly, model systems contained a CALB molecule and different numbers of modified CNC molecules (CALB@3CNC-C16, CALB@10CNC-C16 and CALB@15CNC-C16) were prepared for molecular dynamics (MD) simulation. Root-mean-square fluctuation values (0.61-2.61 Å) of lid region were relatively high in CALB@10CNC-C16, indicating that modified CNC with moderate hydrophobicity favored forming a lid-open conformation of CALB. Finally, the esterification of oleic acid catalyzed by the immobilized CALB showed higher conversion (54.68 %) than free CALB (12.98 %). Insights into modified CNC with tunable properties provided by this study may be a potential support for improving the catalytic performance of lipases.
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Affiliation(s)
- Xue Shi
- College of Food Science, Southwest University, Chongqing 400715, China
| | - Xiaoli Qin
- College of Food Science, Southwest University, Chongqing 400715, China; Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and Chongqing, Chongqing 400715, China
| | - Yunxiang Dai
- College of Food Science, Southwest University, Chongqing 400715, China
| | - Xiong Liu
- College of Food Science, Southwest University, Chongqing 400715, China; Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and Chongqing, Chongqing 400715, China
| | - Weifei Wang
- Sericultural and Agri-Food Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510610, China.
| | - Jinfeng Zhong
- College of Food Science, Southwest University, Chongqing 400715, China; Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and Chongqing, Chongqing 400715, China.
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12
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Chen Y, Yao K, Zhang X, Shen B, Smith RL, Guo H. Siloxane-modified MnO x catalyst for oxidation of coal-related o-xylene in presence of water vapor. J Hazard Mater 2022; 436:129109. [PMID: 35594674 DOI: 10.1016/j.jhazmat.2022.129109] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 05/02/2022] [Accepted: 05/06/2022] [Indexed: 06/15/2023]
Abstract
In coal-combustion energy production, presence of water vapor in flue gas causes catalyst deactivation and leads to the release of large quantities of volatile organic compounds (VOCs). In this study, design of a low-temperature, hydrophobic catalyst for flue gas purification was achieved by modifying support material with inorganic siloxane. Introduction of 5% water vapor into simulated flue gas at 300 °C reduced oxidation efficiency for o-xylene removal by 26% with unmodified MnOx/γ-Al2O3 catalyst, whereas with modified catalyst MnOx-Si0.9/γ-Al2O3 oxidation efficiency was reduced by only 5%. MnOx-Si0.9/γ-Al2O3 exhibited stable catalytic efficiency for o-xylene gas oxidation containing water vapor for over 200 min. Water-resistance of the catalyst was effective for removal of multi-coal combustion pollutants (Hg0 and NO) and moreover, hydrophobicity of the catalyst led to a reduction in surface sulfate deposition, thereby lowering toxicity of SO2 from simulated flue gas. DRIFTS analysis showed that the hydrophobic catalyst surface not only reduces water adsorption, but also promotes water volatilization. Based on molecular adsorption energies, catalyst support modification with siloxane inhibits water adsorption and promotes organic adsorption and thus provides a new strategy for preparing water-resistant catalysts for flue gas purification.
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Affiliation(s)
- Yingjian Chen
- School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin, China; Tianjin Key Laboratory of Clean Energy and Pollution Control, Hebei University of Technology, Tianjin, China
| | - Kening Yao
- School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin, China; Tianjin Key Laboratory of Clean Energy and Pollution Control, Hebei University of Technology, Tianjin, China
| | - Xiao Zhang
- School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin, China; Tianjin Key Laboratory of Clean Energy and Pollution Control, Hebei University of Technology, Tianjin, China.
| | - Boxiong Shen
- School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin, China; Tianjin Key Laboratory of Clean Energy and Pollution Control, Hebei University of Technology, Tianjin, China.
| | - Richard Lee Smith
- Graduate School of Environmental Studies, Tohoku University, Aramaki Aza Aoba 6-6-11, Aoba, Sendai 980-8579, Japan
| | - Haixin Guo
- Graduate School of Environmental Studies, Tohoku University, Aramaki Aza Aoba 6-6-11, Aoba, Sendai 980-8579, Japan
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13
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Li W, Chen K, Biney BW, Guo A, Liu H, Liu D. Hydrophobic and dispersible Cu(I) desulfurization adsorbent prepared from Pistia stratiotes for efficient desulfurization. Sci Total Environ 2022; 819:153056. [PMID: 35032532 DOI: 10.1016/j.scitotenv.2022.153056] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 01/07/2022] [Accepted: 01/07/2022] [Indexed: 06/14/2023]
Abstract
Improving the adsorption capacity of adsorbents is a good way to boost their desulfurization efficiency. Optimizing the dispersion of metal nanoparticles and enhancing the stability of the metal valence state are essential to maximizing the adsorption capacity of the metal-loaded desulfurization adsorbent. Pistia stratiotes can absorb the Cu in water and evenly disperse it throughout the plant, allowing the production of a highly dispersed Cu(I) adsorbent (PSAC-Cu(I)). During the usage and storage of PSAC-Cu(I), Cu(I) oxidizes to Cu(II) when it comes in contact with oxygen and water, reducing its adsorptive capacity; hence, we modified PSAC-Cu(I) hydrophobically using polydimethylsiloxane (PDMS) to generate PSAC-Cu(I)-P(200). The outcome of the two-month exposure experiments showed that only 4.7% of the Cu(I) of PSAC-Cu(I)-P(200) was oxidized in the humid atmosphere, whereas PSAC-Cu(I) was almost fully oxidized. Moreover, the dibenzothiophene adsorption capacity of PSAC-Cu(I)-P(200) in a model oil with a water concentration of 250 ppmw is 68 mg g-1, which is 1.62 times that of PSAC-Cu(I). When 10 wt% toluene was added to the model oil, the adsorption desulfurization capacity of PSAC-Cu(I)-P(200) decreased to 86.8% of the original. This shows that PSAC-Cu(I)-P(200) has good stability and excellent adsorptive desulfurization performance.
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Affiliation(s)
- Weining Li
- State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China), 66 Changjiang West Road, Huangdao District, Qingdao, Shandong 266580, China
| | - Kun Chen
- State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China), 66 Changjiang West Road, Huangdao District, Qingdao, Shandong 266580, China.
| | - Bernard Wiafe Biney
- State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China), 66 Changjiang West Road, Huangdao District, Qingdao, Shandong 266580, China
| | - Aijun Guo
- State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China), 66 Changjiang West Road, Huangdao District, Qingdao, Shandong 266580, China.
| | - He Liu
- State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China), 66 Changjiang West Road, Huangdao District, Qingdao, Shandong 266580, China
| | - Dong Liu
- State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China), 66 Changjiang West Road, Huangdao District, Qingdao, Shandong 266580, China
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Zhang H, Zhao T, Chen Y, Hu X, Xu Y, Xu G, Wang F, Wang J, Shen H. A sustainable nanocellulose-based superabsorbent from kapok fiber with advanced oil absorption and recyclability. Carbohydr Polym 2022; 278:118948. [PMID: 34973765 DOI: 10.1016/j.carbpol.2021.118948] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2021] [Revised: 11/23/2021] [Accepted: 11/26/2021] [Indexed: 12/31/2022]
Abstract
Creating a low-cost, highly efficient, and recyclable superabsorbent for spilled-oil cleanup is of great significance but remains a big challenge. Herein, we report a facile strategy to produce economic, environmentally friendly, and reusable foam from agricultural waste kapok fibers. These kapok-derived cellulose nanofibrils foams (KNFs) demonstrate a hierarchically porous structure at micro-level with ultra-low density (2.7 mg·cm-3). The superhydrophobic KNFs (150.5°) show outstanding oil absorption (126.8-320.4 g·g-1) and oil-water separation performance. Notably, a facile approach is designed to reuse KNFs easily by a homemade oil release system. The release behavior of the KNFs is quantitatively analyzed and confirmed by the Rigter-Peppas model, indicating that the oil release followed the Fickian diffusion. The KNFs exhibit desirable reusability, and can be recycled for at least 50 times while keeping excellent oil absorption, and release performance. These advantages prove that the KNF is a desirable substitute for spilled-oil treatment.
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Affiliation(s)
- Huimin Zhang
- College of Textiles, Donghua University, Shanghai 201620, China
| | - Tong Zhao
- College of Textiles, Donghua University, Shanghai 201620, China
| | - Yu Chen
- College of Textiles, Donghua University, Shanghai 201620, China
| | - Xuefeng Hu
- College of Textiles, Donghua University, Shanghai 201620, China
| | - Yanfang Xu
- College of Textiles, Donghua University, Shanghai 201620, China
| | - Guangbiao Xu
- College of Textiles, Donghua University, Shanghai 201620, China
| | - Fumei Wang
- College of Textiles, Donghua University, Shanghai 201620, China; Key Laboratory of Textile Science & Technology, Ministry of Education, Donghua University, Shanghai 201620, China
| | - Jilong Wang
- College of Textiles, Donghua University, Shanghai 201620, China.
| | - Hua Shen
- College of Textiles, Donghua University, Shanghai 201620, China.
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15
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Evans C, Morimitsu Y, Nishi R, Yoshida M, Takei T. Novel hydrophobically modified agarose cryogels fabricated using dimethyl sulfoxide. J Biosci Bioeng 2022:S1389-1723(21)00354-6. [PMID: 35031212 DOI: 10.1016/j.jbiosc.2021.12.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 12/16/2021] [Accepted: 12/16/2021] [Indexed: 12/23/2022]
Abstract
Drug delivery systems (DDS) are devices able to adsorb therapeutic drugs in vitro before being either injected or surgically implanted into the body before releasing the drugs in vivo. Hydrogels are interesting for DDS researchers as they mimic soft tissue and can absorb large quantities of liquid. This research reported the successful fabrication of hydrophobically modified agarose (HMA) as well as the creation of a novel approach to the formation of hydrophobically modified agarose cryogels. By activating the hydroxyl groups in agarose, hydrophobic modification could occur through the bonding of the activated hydroxyl groups and the amines in fatty aldehydes. It was found that HMA was insoluble in water, and as such a new method of cryogel creation was produced using dimethyl sulfoxide. Further testing of HMA cryogels showed that cell adhesiveness and cytotoxicity were low. Adsorption tests showed that HMA cryogels had the ability to adsorb larger amounts of hydrophobic dye than unmodified agarose cryogels and that the release of the hydrophobic dye from HMA cryogels could be controlled. These results showed that the HMA cryogels made using this novel approach have the potential to be used as drug delivery systems.
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16
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Yang X, Qiu Q, Liu G, Ren H, Wang X, Lovell JF, Zhang Y. Traceless antibiotic-crosslinked micelles for rapid clearance of intracellular bacteria. J Control Release 2021; 341:329-340. [PMID: 34843813 DOI: 10.1016/j.jconrel.2021.11.037] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 11/06/2021] [Accepted: 11/22/2021] [Indexed: 02/07/2023]
Abstract
Effective delivery of antimicrobial agents to intracellular pathogens represents a major bottleneck for a wide variety of infectious diseases. To address this, we developed SIR-micelles(+), as a new delivery vehicle comprising antibiotic-loaded micelles with rapid self-immolation within cells for targeted delivery to macrophages, where most intracellular bacterial reside. After phagocytosis, SIR-micelles(+) rapidly release the pristine antibiotic after the cleavage of the disulfide bonds by intracellular reducing agents such as glutathione (GSH). Colistin, a hydrophilic and potent "last-resort" antibiotic used for the treatment of drug-resistant bacterial infection, was encapsulated in SIR-micelles with 40% yield and good short-term storage stability. Hydrophobic moieties and mannose ligands in SIR-micelles(+) enhanced the delivery of colistin into macrophages. The traceless and thiol-responsive release of colistin effectively eliminated intracellular Escherichia coli within twenty minutes. In a murine pneumonia model, SIR-micelles(+) significantly reduced bacterial lung burden of multidrug-resistant Klebsiella pneumoniae. Furthermore, SIR-micelles(+) improved the survival rate and reduced the bacterial burden of organs infected by intracellular bacteria transferred from donor mice. Using this formulation approach, the nephrotoxicity and neurotoxicity induced by antibiotic were reduced by about 5- 15 fold. Thus, SIR-micelles(+) represent a new class of material that can be used for targeting treatment of intracellular and drug-resistant pathogens.
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Affiliation(s)
- Xingyue Yang
- School of Chemical Engineering and Technology, Tianjin University, 300350, PR China; Key Laboratory of Systems Bioengineering (Ministry of Education) Tianjin University, Tianjin 300072, PR China
| | - Qian Qiu
- School of Chemical Engineering and Technology, Tianjin University, 300350, PR China; Key Laboratory of Systems Bioengineering (Ministry of Education) Tianjin University, Tianjin 300072, PR China
| | - Gengqi Liu
- School of Chemical Engineering and Technology, Tianjin University, 300350, PR China; Key Laboratory of Systems Bioengineering (Ministry of Education) Tianjin University, Tianjin 300072, PR China
| | - He Ren
- School of Chemical Engineering and Technology, Tianjin University, 300350, PR China; Key Laboratory of Systems Bioengineering (Ministry of Education) Tianjin University, Tianjin 300072, PR China
| | - Xiaojie Wang
- School of Chemical Engineering and Technology, Tianjin University, 300350, PR China; Key Laboratory of Systems Bioengineering (Ministry of Education) Tianjin University, Tianjin 300072, PR China
| | - Jonathan F Lovell
- Department of Biomedical Engineering, The State University of New York at Buffalo, Buffalo, NY 14260, USA
| | - Yumiao Zhang
- School of Chemical Engineering and Technology, Tianjin University, 300350, PR China; Key Laboratory of Systems Bioengineering (Ministry of Education) Tianjin University, Tianjin 300072, PR China.
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17
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Hu P, Shen S, Zhao D, Wei H, Ge J, Jia F, Zhang X, Yang H. The influence of hydrophobicity on sludge dewatering associated with cationic starch-based flocculants. J Environ Manage 2021; 296:113218. [PMID: 34246906 DOI: 10.1016/j.jenvman.2021.113218] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 06/25/2021] [Accepted: 07/01/2021] [Indexed: 06/13/2023]
Abstract
Coagulation/flocculation is an extensive and effective pretreatment technology for improving the sludge dewaterability. A series of hydrophobically associated cationic starch-based flocculants (CS-DMRs) with different degrees of hydrophobicity but similar charge densities were designed and synthesized. The CS-DMRs exhibited excellent sludge dewatering performance. The dewaterability of sludge increased with the hydrophobicity of the CS-DMRs, and the filter cake moisture content (FCMC) and specific resistance to filtration (SRF) could be reduced from 95.47% and 7.09 × 1012 m/kg to 79.26% and 2.258 × 1012 m/kg, respectively, at a constant pressure of 0.05 MPa after conditioned by the starch-based flocculant with the highest hydrophobicity at its optimal dose. Moreover, due to their amphiphilic structures, CS-DMRs could closely interact with the negatively charged extracellular polymeric substances (EPS), efficiently compress the protein and polysaccharide in EPS, and release the bound water. A second-order polynomial model was proposed according to the phenomenological theory to quantitatively analyze the effect of hydrophobicity in these starch-based flocculants on the sludge dewaterability. The structure-activity relationship was built, and the optimal dose and corresponding FCMC could be theoretically estimated accordingly. The results were in good agreement with the experimental results. The dewatering mechanisms were also discussed in detail on the basis of the changes in the FCMC, SRF, capillary suction time, properties of sludge flocs, compression coefficient, microstructures of sludge cakes, EPS fractions and components, and spatial distributions of the proteins and polysaccharides. In addition to charge neutralization, the hydrophobic association effects of CS-DMRs played an important role in the formation of drainage channels and net-like porous structures in the sludge cake to improve its permeability and filterability. This study thus provided a good understanding of the structural effects of the starch-based flocculants on the sludge dewaterability. The results are greatly beneficial to the fabrication and utilization of environment-friendly and high-performance natural polymeric conditioners for sludge treatment.
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Affiliation(s)
- Pan Hu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, PR China
| | - Shaohang Shen
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, PR China
| | - Donghua Zhao
- Shanghai Waterway Engineering Design and Consulting Co., LTD., Shanghai, 200120, PR China
| | - Hua Wei
- Shanghai Waterway Engineering Design and Consulting Co., LTD., Shanghai, 200120, PR China
| | - Jun Ge
- Shanghai Waterway Engineering Design and Consulting Co., LTD., Shanghai, 200120, PR China
| | - Feiyue Jia
- Shanghai Waterway Engineering Design and Consulting Co., LTD., Shanghai, 200120, PR China
| | - Xiangxiang Zhang
- Shanghai Waterway Engineering Design and Consulting Co., LTD., Shanghai, 200120, PR China
| | - Hu Yang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, PR China; Quanzhou Institute for Environmental Protection Industry, Nanjing University, Beifeng Road, Quanzhou, 362000, PR China.
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18
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Huang Y, Sun Y, Liu H. Fabrication of chitin nanofiber-PDMS composite aerogels from Pickering emulsion templates with potential application in hydrophobic organic contaminant removal. J Hazard Mater 2021; 419:126475. [PMID: 34323711 DOI: 10.1016/j.jhazmat.2021.126475] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 06/18/2021] [Accepted: 06/21/2021] [Indexed: 06/13/2023]
Abstract
Natural polymers have aroused increasing attention in water treatment but their application in removing hydrophobic organic contaminants (HOCs) was limited due to their hydrophilicity. Herein, hydrophobic aerogels were successfully fabricated from Pickering emulsions stabilized by chitin nanofibers (ChNF) with polydimethylsiloxane (PDMS) as dispersed phase and glutaraldehyde as a crosslinking agent, and their performance in HOCs removal were evaluated. The Pickering emulsions with PDMS ratios of 2.5-20% v/v showed high stability, demonstrating great potential as aerogel templates. The solidified PDMS droplets were evenly distributed within the matrix, contributing to homogeneous and permanent hydrophobicity. The composite aerogels with water contact angles of over 130° could selectively remove non-aqueous phase HOCs from water. The CCl4 adsorption capacity was 521-2820 wt%, depending on PDMS contents. Meanwhile, the mechanical resilience of the composite aerogels was significantly improved, facilitating the adsorbent regeneration by simple mechanical squeezing. The adsorption capacity remained above 85% for 24 cycles. Moreover, the aerogels could also remove dissolved HOCs from water with a maximum adsorption capacity of 1.34 mg/g for 10 mg/L TCE. This work reveals the potential of Pickering emulsions in the fabrication of composite hydrophobic materials from natural biopolymers with promising application in HOCs related water treatment.
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Affiliation(s)
- Yao Huang
- School of Environmental Studies, China University of Geosciences, 388 Lumo Road, Wuhan 430074, China
| | - Yunfang Sun
- School of Environmental Studies, China University of Geosciences, 388 Lumo Road, Wuhan 430074, China
| | - Hui Liu
- School of Environmental Studies, China University of Geosciences, 388 Lumo Road, Wuhan 430074, China; State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China.
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19
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Duan H, Lyu H, Shen B, Tian J, Pu X, Wang F, Wang X. Superhydrophobic-superoleophilic biochar-based foam for high-efficiency and repeatable oil-water separation. Sci Total Environ 2021; 780:146517. [PMID: 33770598 DOI: 10.1016/j.scitotenv.2021.146517] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 03/08/2021] [Accepted: 03/12/2021] [Indexed: 06/12/2023]
Abstract
Leakage accidents occurring during oil production and transportation are currently one of the most serious environmental problems worldwide. Developing efficient and environmentally friendly oil-water separation methods is the key to solve this problem. In this work, a facile method to fabricate a high-performance oil absorbent through the loading of ball-milled biochar (BMBC) and octadecylamine on the skeleton of melamine foam (MF) is reported. The resulting ball-milled biochar-based MF (BMBC@MF) displayed a complex three-dimensional porous structure. The BM biochar on the surface of BMBC@MF forms nano/μm-scale folds, which reduced the surface energy of BMBC@MF after grafted octadecylamine. These structures resulted in the conversion of the hydrophilic surface of MF to hydrophobic surface. These characteristics made the modified foam an excellent oil absorbent with a high oil absorption capacity (43-155 times its own weight) and extraordinary recyclability. Furthermore, the BMBC@MF could maintain high hydrophobicity and adsorption stability in a wide pH range (from 1 to 11). More importantly, BM biochar is a cheap and readily available material to make BMBC@MF possible for large-scale production. Therefore, this work provides an effective way for low-cost, environmentally friendly, and large-scale production of superhydrophobic adsorbents for oil-water separation.
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Affiliation(s)
- Haonan Duan
- Tianjin Key Laboratory of Clean Energy and Pollution Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, China
| | - Honghong Lyu
- Tianjin Key Laboratory of Clean Energy and Pollution Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, China; School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin 300401, China; Tianjin Eco-City Environmental Protection Limited Company, Tianjin 300467, China.
| | - Boxiong Shen
- Tianjin Key Laboratory of Clean Energy and Pollution Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, China
| | - Jingya Tian
- Tianjin Key Laboratory of Clean Energy and Pollution Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, China
| | - Xinyu Pu
- Tianjin Key Laboratory of Clean Energy and Pollution Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, China
| | - Fumei Wang
- Tianjin Key Laboratory of Clean Energy and Pollution Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, China
| | - Xudong Wang
- Tianjin Eco-City Environmental Protection Limited Company, Tianjin 300467, China
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20
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Chen X, Taguchi T. Enhanced skin adhesive property of α-cyclodextrin/nonanyl group-modified poly(vinyl alcohol) inclusion complex film. Carbohydr Polym 2021; 263:117993. [PMID: 33858580 DOI: 10.1016/j.carbpol.2021.117993] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 01/19/2021] [Accepted: 03/24/2021] [Indexed: 01/02/2023]
Abstract
For skin contact medical devices, realizing a strong contact with skin is essential to precisely detect human biological information and enable human-machine interaction. In this study, we aimed to fabricate and characterize an inclusion complex film (ICF) for skin adhesion using α-cyclodextrin (α-CD) and nonanyl group-modified PVA (C9-PVA) under wet conditions. Based on the water insolubility of C9-PVA and the inclusion ability of α-CD for alkyl groups, α-CD/C9-PVA ICF was prepared. Among the prepared ICFs, α-CD/2.5C9-PVA (w/w = 0.5) ICF showed the highest bonding strength and T-peeling strength to porcine skin. Furthermore, α-CD/2.5C9-PVA (w/w = 0.5) ICF had better water vapor transmission rate than that of commercial tapes. In addition, the ion permeability test revealed that α-CD/2.5C9-PVA (w/w = 0.5) ICF exhibited excellent Na and Cl ion permeability. These results demonstrated that the multi-functional α-CD/2.5C9-PVA (w/w = 0.5) ICF can be a promising adhesive for skin contact medical devices.
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Affiliation(s)
- Xi Chen
- Polymers and Biomaterials Field, Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Tetsushi Taguchi
- Polymers and Biomaterials Field, Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan.
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21
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Zhang Y, Chong JY, Xu R, Wang R. Effective separation of water-DMSO through solvent resistant membrane distillation (SR-MD). Water Res 2021; 197:117103. [PMID: 33848849 DOI: 10.1016/j.watres.2021.117103] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 02/20/2021] [Accepted: 03/29/2021] [Indexed: 06/12/2023]
Abstract
The treatment of organic waste or wastewater with high organic solvent content has been challenging in industries as it cannot be done effectively using conventional wastewater treatment technologies such as biodegradation and advanced oxidation process. Solvent resistant membrane distillation (SR-MD) was proposed as an energy-efficient alternative to treat these waste streams but its application is hampered by the lack of solvent-resistant membranes, and there is a research gap in studying the feeds with water-solvent mixtures. In this work, ceramic tubular membranes with different pore sizes and structures were molecularly grafted with 1H,1H,2H,2H-perfluorodecyltriethoxysilane to obtain hydrophobic ceramic membranes for SR-MD. The modified membranes exhibited excellent hydrophobicity and solvent resistant properties, and they were tested for SR-MD performance with a wide range of dimethyl sulfoxide (DMSO) feed concentrations, from 3.5 to 85 wt%. The membranes exhibited a high DMSO rejection of >98% and the separation factor of >170, with permeation flux >4.4 kg m-2 h-1 when the DMSO concentration in feed was below 65 wt%. The separation performance was found strongly dependent on the evaporation step and the vapour-liquid equilibrium near the interface. The DMSO rejection was also comparable to pervaporation while the permeation flux was much higher at the feed concentration of 50 wt%. This study establishes the strategy of using SR-MD as a promising membrane process in treating complex industrial wastes with high organic solvent content.
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Affiliation(s)
- Yujun Zhang
- Interdisciplinary Graduate Programme, Graduate College, Nanyang Technological University, Singapore 637553, Singapore; Singapore Membrane Technology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, Singapore 637141, Singapore; School of Civil and Environmental Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Jeng Yi Chong
- Singapore Membrane Technology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, Singapore 637141, Singapore
| | - Rong Xu
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459, Singapore
| | - Rong Wang
- Singapore Membrane Technology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, Singapore 637141, Singapore; School of Civil and Environmental Engineering, Nanyang Technological University, Singapore 639798, Singapore.
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Xue J, Li Z, Duan H, He J, Luo Y. Chemically modified phytoglycogen: Physicochemical characterizations and applications to encapsulate curcumin. Colloids Surf B Biointerfaces 2021; 205:111829. [PMID: 34023786 DOI: 10.1016/j.colsurfb.2021.111829] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 04/30/2021] [Accepted: 05/04/2021] [Indexed: 12/25/2022]
Abstract
Phytoglycogen (PG), a water-soluble glycogen-like α-d-glucan, exists as natural dendritic nanoparticles which are known as a promising solubility enhancer and delivery vehicle for lipophilic compounds. However, the practical applications of PG in food and pharmaceutical fields are limited by their high hydrophilicity and relatively low encapsulation efficiency compared with other delivery systems. The objectives of this work were to chemically modify native PG nanoparticles with hydrophobic groups and to characterize their physicochemical properties, as well as to evaluate the application feasibility of modified PG (mPG) nanoparticles as a carrier for hydrophobic bioactive compounds. The surface hydroxyl groups of PG nanoparticles were capped with various anhydrides, e.g., acetic, valeric, and N-caprylic, to obtain the PG nanoparticles with different hydrophobicity. Successful modification by acyl groups was evidenced by both Fourier-transform infrared and nuclear magnetic resonance spectroscopies. The mPG nanoparticles exhibited a more compact structure and homogeneous size distribution as revealed by dynamic light scattering measurement and visualized by transmission electron microscope, while their size slightly increased with the chain length of anhydride. Rheological measurement revealed that the viscosity of mPG at low shear rate was increased with the increase of degree of substitution due to the intermolecular hydrophobic association. A novel pH-driven method to load curcumin showed significantly higher encapsulation efficiency and greater antioxidant activity compared with traditional ethanol mediated loading method. Hydrophobic modification of natural dendritic PG nanostructures demonstrates promising potential to develop food-grade nanocarriers for lipophilic bioactive compounds with improved bioactivity.
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Evans C, Morimitsu Y, Hisadome T, Inomoto F, Yoshida M, Takei T. Optimized hydrophobically modified chitosan cryogels for strength and drug delivery systems. J Biosci Bioeng 2021; 132:81-87. [PMID: 33853755 DOI: 10.1016/j.jbiosc.2021.03.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2020] [Revised: 03/16/2021] [Accepted: 03/17/2021] [Indexed: 01/01/2023]
Abstract
This research reports the success of the fabrication of hydrophobically modified chitosan cryogel. Chitosan was modified with alkyl groups through reductive animation. By varying the alkyl chain length and the substitution degree, the resulting cryogel could be optimized for strength, and the adsorption and release of hydrophobic dye, a model for hydrophobic medicines. By optimizing these attributes, the hydrogel was found to have the potential as a biomedical material.
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Affiliation(s)
- Courtney Evans
- Department of Chemical Engineering, Graduate School of Science and Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima 890-0065, Japan.
| | - Yuto Morimitsu
- Department of Chemical Engineering, Graduate School of Science and Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima 890-0065, Japan.
| | - Tsubasa Hisadome
- Department of Chemical Engineering, Graduate School of Science and Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima 890-0065, Japan.
| | - Futo Inomoto
- Department of Chemical Engineering, Graduate School of Science and Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima 890-0065, Japan.
| | - Masahiro Yoshida
- Department of Chemical Engineering, Graduate School of Science and Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima 890-0065, Japan.
| | - Takayuki Takei
- Department of Chemical Engineering, Graduate School of Science and Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima 890-0065, Japan.
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24
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Chen X, Taguchi T. Bonding a titanium plate and soft tissue interface by using an adhesive bone paste composed of α-tricalcium phosphate and α-cyclodextrin/nonanyl group-modified poly(vinyl alcohol) inclusion complex. Colloids Surf B Biointerfaces 2021; 203:111757. [PMID: 33862571 DOI: 10.1016/j.colsurfb.2021.111757] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 04/04/2021] [Accepted: 04/06/2021] [Indexed: 10/21/2022]
Abstract
Adhesive bone pastes for dental implants and soft tissue interfaces were developed using α-tricalcium phosphate (α-TCP) and α-cyclodextrin (α-CD)/nonanyl group-modified poly(vinyl alcohol) (C9-PVA) inclusion complex solution (ICS). The thixotropic solution of α-CD/C9-PVA ICS was prepared by mixing α-CD and C9-PVA in deionized water. The α-CD/C9-PVA bone paste led to the highest bonding and shear adhesion between commercial pure titanium plates and soft tissue like collagen casing. Moreover, the compressive strength of these pastes reached 14.1 ± 3.8 MPa within 24 h incubation. Young's modulus of the α-CD/C9-PVA bone paste was lower than that of commercial calcium phosphate paste. Furthermore, the surface of α-CD/C9-PVA bone paste demonstrated excellent cell adhesion for cultured L929 fibroblast cells. Overall, the α-CD/C9-PVA bone paste can likely be effectively used to adhere dental implant abutments and soft tissue interfaces.
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Affiliation(s)
- Xi Chen
- Polymers and Biomaterials Field, Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Tetsushi Taguchi
- Polymers and Biomaterials Field, Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan.
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Zhang H, Wang J, Xu G, Xu Y, Wang F, Shen H. Ultralight, hydrophobic, sustainable, cost-effective and floating kapok/microfibrillated cellulose aerogels as speedy and recyclable oil superabsorbents. J Hazard Mater 2021; 406:124758. [PMID: 33321313 DOI: 10.1016/j.jhazmat.2020.124758] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 11/29/2020] [Accepted: 12/01/2020] [Indexed: 05/14/2023]
Abstract
Cellulose aerogels achieve excellent absorption of waste oil and organic pollutant, which has received lots of attention recently. It is still a big challenge to obtain aerogels with both high cost-effectiveness and advanced oil absorption performance, since it is a time-consuming, and environmentally unfriendly process to obtain cellulose, compared with direct usage of natural fibers. In this manuscript, we develop highly porous and hydrophobic kapok/microfibrillated cellulose (MFC) aerogels with a dual-scale hierarchically porous structure at micro-level as cost-effective, sustainable, and floating superabsorbents via simple vacuum freeze-drying and surface modification. Kapok, a natural hollow fiber, has been recently considered as a new sustainable resource for oil cleanup. By partially replacing MFC with chopped kapok fibers in MFC aerogels (MMAs), the resultant kapok/MFC aerogels (KCAs) exhibit ultralow density (5.1 mg/cm-3), ultrahigh porosity (99.58%) and hydrophobicity (140.1°) leading to advanced oil sorption (130.1 g/g) that is 25.3% higher than that of MMAs. In addition, these KCAs can rapidly and selectively absorb waste oil from oil-water mixture with ultrahigh absorption ability of 104-190.1 g/g, which is comparable to other environmentally unfriendly and high-cost aerogels. Furthermore, the KCAs own excellent reusability and sustainability. These benefits enable the KCAs a suitable alternative to clean oil spills.
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Affiliation(s)
- Huimin Zhang
- College of Textiles, Donghua University, Shanghai 201620, China
| | - Jilong Wang
- College of Textiles, Donghua University, Shanghai 201620, China
| | - Guangbiao Xu
- College of Textiles, Donghua University, Shanghai 201620, China
| | - Yanfang Xu
- College of Textiles, Donghua University, Shanghai 201620, China
| | - Fumei Wang
- College of Textiles, Donghua University, Shanghai 201620, China; Key Laboratory of Textile Science & Technology, Ministry of Education, Donghua University, Shanghai 201620, China
| | - Hua Shen
- College of Textiles, Donghua University, Shanghai 201620, China.
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26
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Mizuta R, Mizuno Y, Chen X, Kurihara Y, Taguchi T. Evaluation of an octyl group-modified Alaska pollock gelatin-based surgical sealant for prevention of postoperative adhesion. Acta Biomater 2021; 121:328-338. [PMID: 33326886 DOI: 10.1016/j.actbio.2020.12.025] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 12/06/2020] [Accepted: 12/10/2020] [Indexed: 02/07/2023]
Abstract
Postoperative adhesion can lead to an increase in the number of surgeries required, longer operation times, and high medical costs, resulting in the quality of life of the patient being lowered. To address these clinical problems, we developed a surgical sealant with anti-adhesion properties for the prevention of postoperative adhesion following application to the large intestine surface. The developed sealant was composed of octyl (C8) group-modified Alaska pollock-derived gelatin (C8-ApGltn) and a poly(ethylene)glycol-based 4-armed crosslinker (4S-PEG) (C8-ApGltn/4S-PEG sealant). Hydrophobic modification of the ApGltn molecule with C8 groups effectively enhanced both the burst strength on the large intestine surface and the bulk modulus. An in vitro anti-adhesion test indicated that cured C8-ApGltn/4S-PEG sealant adhered to the large intestine surface showed low adhesive strength compared with commercial anti-adhesion film. Besides, cured C8-ApGltn/4S-PEG sealant effectively inhibited albumin permeation and penetration of L929 fibroblasts. In vivo experiments using a rat peritoneal anti-adhesion model showed that C8-ApGltn/4S-PEG sealant acted as a sealing barrier on the target cecum surface and also provided an anti-adhesion barrier to prevent postoperative adhesion between the peritoneum and cecum. C8-ApGltn/4S-PEG sealant showed sufficient cytocompatibility and biodegradability and therefore has potential for use in gastroenterological surgery.
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Affiliation(s)
- Ryo Mizuta
- Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan; Polymers and Biomaterials Field, Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Yosuke Mizuno
- Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan; Polymers and Biomaterials Field, Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Xi Chen
- Polymers and Biomaterials Field, Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Yukari Kurihara
- Polymers and Biomaterials Field, Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Tetsushi Taguchi
- Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan; Polymers and Biomaterials Field, Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan.
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Kumar R, Sirvi A, Kaur S, Samal SK, Roy S, Sangamwar AT. Polymeric micelles based on amphiphilic oleic acid modified carboxymethyl chitosan for oral drug delivery of bcs class iv compound: Intestinal permeability and pharmacokinetic evaluation. Eur J Pharm Sci 2020; 153:105466. [PMID: 32673792 DOI: 10.1016/j.ejps.2020.105466] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 07/11/2020] [Accepted: 07/12/2020] [Indexed: 10/23/2022]
Abstract
Chemical modification of chitosan derivatives with hydrophobic fatty acids to enhance their self-aggregation behavior is well established. Previously our group reported low molecular weight carboxymethyl chitosan (CMCS) which showed enhancement in apparent permeability of hydrophobic drug, tamoxifen. Further extension to this work, herein we synthesize a new polymer of oleic acid grafted low molecular weight carboxymethyl chitosan (OA-CMCS) for maneuvering biopharmaceutical performance of poorly water soluble drugs. This polymer was designed and synthesized via amidation reaction and well characterized by analytical tools like 1H-NMR and FT-IR spectroscopy. OA-CMCS conjugate easily self-organized into micelles like structure in an aqueous medium and showed a low critical micellar concentration of 1 µg/mL. Poorly water-soluble drug, docetaxel (DTX) was used as a model drug in this study. Optimization of variables resulted in the formation of spherical DTX loaded OA-CMCS micelles in the size range of 213.4 ± 9.6 nm with an entrapment efficiency of 57.26 ± 1.25%. DTX loaded OA-CMCS micelles showed slow and sustained DTX release behavior in simulated body fluid during in vitro release study. The permeability of DTX loaded OA-CMCS micelles across the gastrointestinal tract were investigated by in vitro Caco-2 cells model. The apparent permeability of DTX loaded OA-CMCS micelles improved up to 6.57-fold in comparison to free DTX suspension which indicates the increase in paracellular absorption of DTX. Additionally, in vivo pharmacokinetic study demonstrates an increase in Cmax (1.97-fold) and AUC (2.62-fold) for DTX loaded OA-CMCS micelles compared to free DTX suspension. Hence, we propose OA-CMCS as a promising cargo to incorporate drugs for enhancement of biopharmaceutical performance.
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Affiliation(s)
- Rahul Kumar
- Department of Pharmaceutical Technology (Formulations), National Institute of Pharmaceutical Education and Research, Sector-67, S.A.S Nagar, Punjab 160062, India
| | - Arvind Sirvi
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research, Sector-67, S.A.S Nagar, Punjab 160062, India
| | - Shamandeep Kaur
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research, Sector-67, S.A.S Nagar, Punjab 160062, India
| | - Sanjaya K Samal
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research, Sector-67, S.A.S Nagar, Punjab 160062, India
| | - Sabyasachi Roy
- Department of Pharmaceutical Technology (Formulations), National Institute of Pharmaceutical Education and Research, Sector-67, S.A.S Nagar, Punjab 160062, India
| | - Abhay T Sangamwar
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research, Sector-67, S.A.S Nagar, Punjab 160062, India.
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Sharma D, Singh J. Long-term glycemic control and prevention of diabetes complications in vivo using oleic acid-grafted-chitosan‑zinc-insulin complexes incorporated in thermosensitive copolymer. J Control Release 2020; 323:161-178. [PMID: 32283211 PMCID: PMC7299807 DOI: 10.1016/j.jconrel.2020.04.012] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 03/12/2020] [Accepted: 04/07/2020] [Indexed: 12/31/2022]
Abstract
Daily injections for basal insulin therapy are far from ideal resulting in hypo/hyperglycemic episodes associated with fatal complications in type-1 diabetes patients. Here we report a delivery system that provides controlled release of insulin closely mimicking physiological basal insulin requirement for an extended period following a single subcutaneous injection. Stability of insulin was significantly improved by formation of zinc-insulin hexamers, further stabilized by electrostatic complex formation with chitosan polymer. Insulin complexes were homogenously incorporated into PLA-PEG-PLA, a biodegradable thermogel copolymer, that instantaneously forms a subcutaneous gel-depot following injection. Chitosan polymer was hydrophobically modified using oleic acid prior to complex formation with insulin to enable distribution of oleic acid-grafted-chitosan‑zinc-insulin complexes into the hydrophobic core of PLA-PEG-PLA thermogel-copolymer micelles. In vivo, daily administration of marketed long-acting insulin, glargine, resulted in fluctuating blood glucose levels between 91 and 443 mg/dL in type 1 diabetic rats. However, single administration of thermogel copolymeric formulation successfully demonstrated slow diffusion of insulin complexes maintaining peak-free basal insulin level of 21 mU/L for 91 days. Sustained release of basal insulin also correlated with efficient glycemic control (blood glucose <120 mg/dL), prevention of diabetic ketoacidosis and absence of cataract development, unlike other treatment groups. Moreover, there was no sign of inflammation, tissue damage, or collagen deposition around depot site, suggesting exceptional biocompatibility of the formulation for long-term use.
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Affiliation(s)
- Divya Sharma
- Department of Pharmaceutical Sciences, School of Pharmacy, College of Health Professions, North Dakota State University, Fargo 58105, ND, USA.
| | - Jagdish Singh
- Deparment of Pharmaceutical Sciences, North Dakota State University, USA.
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29
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Tang C, Huang X, Wang H, Shi H, Zhao G. Mechanism investigation on the enhanced photocatalytic oxidation of nonylphenol on hydrophobic TiO 2 nanotubes. J Hazard Mater 2020; 382:121017. [PMID: 31446350 DOI: 10.1016/j.jhazmat.2019.121017] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 08/02/2019] [Accepted: 08/13/2019] [Indexed: 06/10/2023]
Abstract
Enhanced and selective photocatalytic oxidation of nonylphenol (NP), a typical hydrophobic endocrine disrupting chemicals (EDCs), was realized on hydrophobic titanium dioxide nanotubes (H-TiO2NTs), which was fabricated by an electrochemical anodization method, followed by grafting of perfluorooctyl groups. The water contact angle of catalyst surface changed from 21.1° to 128.4° after hydrophobic modification. H-TiO2NTs showed excellent photocatalytic oxidation performance for NP, that it was completely converted in 40 min under irradiation, which was improved for about 17% compared with the hydrophilic TiO2NTs. The enhanced photocatalytic performance of H-TiO2NTs was attributed to the stronger adsorption ability toward NP identified by ATR-FTIR, with an initial adsorption rate of 4 times as higher as that of bare TiO2NTs. Meanwhile, the hydrophobic surface of H-TiO2NTs was beneficial for generation of more hydroxyl radicals. The apparent rate constant of hydroxyl radicals' generation on H-TiO2NTs, which was the main oxidizing species, could reach 1.83 times that of the hydrophilic TiO2NTs. Both the two factors contributed to the successful competition of NP against the coexistent hydrophilic contaminates in the adsorption and oxidation on the catalyst surface, leading to the selective removal of NP in mixed systems finally.
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Affiliation(s)
- Chunjing Tang
- School of Chemical Science and Engineering, and Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, 1239 Siping Road, Shanghai, 200092, China
| | - Xuerong Huang
- School of Chemical Science and Engineering, and Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, 1239 Siping Road, Shanghai, 200092, China
| | - Haoying Wang
- School of Chemical Science and Engineering, and Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, 1239 Siping Road, Shanghai, 200092, China
| | - Huijie Shi
- School of Chemical Science and Engineering, and Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, 1239 Siping Road, Shanghai, 200092, China.
| | - Guohua Zhao
- School of Chemical Science and Engineering, and Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, 1239 Siping Road, Shanghai, 200092, China.
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30
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Abstract
Palmitoylation or S-acylation is the posttranslational attachment of fatty acids to cysteine residues and is common among integral and peripheral membrane proteins. Palmitoylated proteins have been found in every eukaryotic cell type examined (yeast, insect, and vertebrate cells), as well as in viruses grown in these cells. The exact functions of protein palmitoylation are not well understood. Intrinsically hydrophilic proteins, especially signaling molecules, are anchored by long-chain fatty acids to the cytoplasmic face of the plasma membrane. Palmitoylation may also promote targeting to membrane subdomains enriched in glycosphingolipids and cholesterol or affect protein-protein interactions.This chapter describes (1) a standard protocol for metabolic labeling of palmitoylated proteins and also the procedures to prove a covalent and ester-type linkage of the fatty acids, (2) a simple method to analyze the fatty acid content of S-acylated proteins, (3) two methods to analyze dynamic palmitoylation for a given protein, and (4) protocols to study cell-free palmitoylation of proteins.
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Affiliation(s)
- Larisa Kordyukova
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia.
| | - Ludwig Krabben
- Freie Universität Berlin, Fachbereich Veterinärmedizin, Zentrum für Infektionsmedizin, Institut für Virologie, Berlin, Germany
| | - Marina Serebryakova
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Michael Veit
- Freie Universität Berlin, Fachbereich Veterinärmedizin, Zentrum für Infektionsmedizin, Institut für Virologie, Berlin, Germany.
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31
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Gumfekar SP, Soares JBP. A novel hydrophobically-modified polyelectrolyte for enhanced dewatering of clay suspension. Chemosphere 2018; 194:422-431. [PMID: 29227890 DOI: 10.1016/j.chemosphere.2017.12.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Revised: 11/26/2017] [Accepted: 12/02/2017] [Indexed: 06/07/2023]
Abstract
This work investigates the effect of multifunctional poly (N-isopropyl acrylamide/acrylic acid/N-tert-butylacrylamide) [p(NIPAM-AA-NTBA)] ternary polymer on the sedimentation of kaolin clay - a major fraction of oil sands tailings. A series of linear, uncross-linked p(NIPAM), p(NIPAM/AA), and p(NIPAM/AA/NTBM) were synthesized as random copolymers, where all monomer units were randomly arranged along the polymer backbone and connected by covalent bonds. The ternary copolymer, used as a flocculant, exhibited thermo-sensitivity, anionic nature, and hydrophobic association due to NIPAM, AA, and NTBM, respectively. As the ternary polymer is thermosensitive, it undergoes extended to coil-like conformation, i.e. hydrophilic to hydrophobic transition, above its lower critical solution temperature (LCST). The comonomers NIPAM (above LCST) and NTBM help expel water out of sediments due to their hydrophobicity, while AA promotes charge neutralization of the kaolin clay particles. The effect of number average molecular weight, charge density, and concentration of NTBM on settling behavior of kaolin suspension was examined. Settling test at 50 °C resulted in significantly higher settling rates compared to that at room temperature. Further, the quality of water recovered in each experiment was tested in terms of its turbidity. These results indicate that this novel ternary polymer can be employed to enhance the recovery of water from oil sands tailings containing clays.
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Affiliation(s)
- Sarang P Gumfekar
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB, T6G 2V4, Canada.
| | - João B P Soares
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB, T6G 2V4, Canada.
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Zhou Q, Luo T, Yang H, Liang C, Jing L, Luo W. From fly ash waste slurry to functional adsorbent for valuable rare earth ion separation: An ingenious combination process involving modification, dewatering and grafting. J Colloid Interface Sci 2018; 513:427-37. [PMID: 29174649 DOI: 10.1016/j.jcis.2017.11.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Revised: 10/25/2017] [Accepted: 11/05/2017] [Indexed: 10/18/2022]
Abstract
Acid extracting aluminum from fly ash would produce pestilent secondary fly ash slurry with strong acidity, high content of Cl- and residual Al3+ that is difficult to be further used. In order to achieve the zero emission, a potential integrated treatment process for reutilization was proposed in this paper. By intelligent use of residual Al3+ in sludge as catalyst, hydrophobic modification of solid particle was taken with fatty acid via a heterogeneous esterification at normal temperature. Due to the solvophobic force, moisture content of its filter cake was 36.46%, which reduced 11.14% compared with the unmodified one, hydrophobicity scale can achieve 100% with modifier accounting for only 0.8% of solid content and the Cl- concentrations decreased from 20 to 0.102 g/L in wash liquor, thus greatly saving water for washing and energy for drying. Subsequently, based on the appearance of hydrocarbon chains on particle surface, a high-efficiency ultraviolet-induced grafting polymerization was implemented to fabricate density polyacrylic acid decorated fly ash particles from the surface "CH" sites, the resultant composite was proved to efficiently separate valuable rare-earth Gd3+ from wastewater with outstanding adsorption and regeneration performance, hence bringing high added-value utilization for these hazardous waste.
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Zhang F, Shen Y, Ren T, Wang L, Su Y. Synthesis of 2-alkenyl-3-butoxypropyl guar gum with enhanced rheological properties. Int J Biol Macromol 2017; 97:317-322. [PMID: 28093331 DOI: 10.1016/j.ijbiomac.2017.01.062] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Revised: 12/12/2016] [Accepted: 01/12/2017] [Indexed: 10/20/2022]
Abstract
A new guar gum derivative was synthesized though the nucleophilic substitution of sodium hydroxide-activated guar gum with n-butyl glycidyl (BGE) ether. The physicochemical properties of 2-alkenyl-3-butoxypropyl guar gum (ABPG) were characterized by attenuated total reflection Fourier transform infrared spectrometry (ATR-FTIR), X-ray diffraction (XRD) and thermal gravimetric analyses (TGA). The results showed that sodium hydroxide can be effectively substituted with BGE to form the ABPG. The steady and dynamic rheological properties of the aqueous solution and ABPG gel were determined using an RS6000 rheometer. Compared with the guar gum, ABPG enhanced the thickening property and improved the solution stability. The ABPG gel exhibited good temperature resistance and shear stability properties.
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Affiliation(s)
- Fengsan Zhang
- Key Laboratory of Auxiliary Chemistry & Technology for Chemical Industry, Ministry of Education, Shaanxi University of Science & Technology, Xi'an, Shaanxi Province, People's Republic of China; Research Institute of Shanxi Yanchang Petroleum (group) Co., Ltd., Xi'an, Shaanxi Province, People's Republic of China.
| | - Yiding Shen
- Key Laboratory of Auxiliary Chemistry & Technology for Chemical Industry, Ministry of Education, Shaanxi University of Science & Technology, Xi'an, Shaanxi Province, People's Republic of China
| | - Ting Ren
- Research Institute of Shanxi Yanchang Petroleum (group) Co., Ltd., Xi'an, Shaanxi Province, People's Republic of China
| | - Lei Wang
- Key Laboratory of Auxiliary Chemistry & Technology for Chemical Industry, Ministry of Education, Shaanxi University of Science & Technology, Xi'an, Shaanxi Province, People's Republic of China
| | - Ying Su
- Key Laboratory of Auxiliary Chemistry & Technology for Chemical Industry, Ministry of Education, Shaanxi University of Science & Technology, Xi'an, Shaanxi Province, People's Republic of China
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Wang H, Tang M, Zhang K, Cai D, Huang W, Chen R, Yu C. Functionalized hollow siliceous spheres for VOCs removal with high efficiency and stability. J Hazard Mater 2014; 268:115-23. [PMID: 24486614 DOI: 10.1016/j.jhazmat.2013.12.070] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Revised: 11/30/2013] [Accepted: 12/25/2013] [Indexed: 05/27/2023]
Abstract
Functionalized hollow siliceous spheres (HSSs) have been prepared by surface modification with trimethylchlorosilane (TMCS) for the removal of volatile organic compounds (VOCs). The resultant HSSs-TMCS possesses a uniform and well-dispersed hollow spherical structure, high surface area, large total pore volume, high VOCs adsorption capacity, and small water vapor adsorption capacity. The adsorption and desorption performance of HSSs-TMCS under static (n-hexane and 93# gasoline) and dynamic (n-hexane) conditions was investigated. Compared with commercial silica gel (SG) and activated carbon (AC), HSSs-TMCS show higher capacity of adsorbing n-hexane and 93# gasoline with good stability and low water vapor adsorption capacity under static adsorption conditions, higher dynamic adsorption capacity and stable breakthrough time under dynamic adsorption conditions. The high efficiency and stability of functionalized HSSs are associated with their unique hollow morphology and structure parameters. The designed HSSs-TMCS with high VOCs removal capacity and recyclability are promising candidates for the treatment of air pollution.
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Affiliation(s)
- Hongning Wang
- School of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, 1 Gehu Road, Changzhou, Jiangsu 213164, PR China
| | - Mei Tang
- School of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, 1 Gehu Road, Changzhou, Jiangsu 213164, PR China
| | - Ke Zhang
- School of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, 1 Gehu Road, Changzhou, Jiangsu 213164, PR China
| | - Daofei Cai
- Jiangsu Provincial Key Laboratory of Oil and Gas Storage and Transportation Technology, Changzhou University, Xingyuan Road, Changzhou, Jiangsu 213016, PR China
| | - Weiqiu Huang
- Jiangsu Provincial Key Laboratory of Oil and Gas Storage and Transportation Technology, Changzhou University, Xingyuan Road, Changzhou, Jiangsu 213016, PR China
| | - Ruoyu Chen
- School of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, 1 Gehu Road, Changzhou, Jiangsu 213164, PR China.
| | - Chengzhong Yu
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD 4072, Australia
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Han S, Wan H, Lin D, Guo S, Dong H, Zhang J, Deng L, Liu R, Tang H, Dong A. Contribution of hydrophobic/hydrophilic modification on cationic chains of poly(ε-caprolactone)-graft-poly(dimethylamino ethylmethacrylate) amphiphilic co-polymer in gene delivery. Acta Biomater 2014; 10:670-9. [PMID: 24096149 DOI: 10.1016/j.actbio.2013.09.035] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2013] [Revised: 09/11/2013] [Accepted: 09/25/2013] [Indexed: 12/23/2022]
Abstract
Nanoparticles (NPs) assembled from amphiphilic polycations have been certified as potential carriers for gene delivery. Structural modification of polycation moieties may be an efficient route to further enhance gene delivery efficiency. In this study two electroneutral monomers with different hydrophobicities, 2-hydroxyethyl methacrylate (HEMA) and 2-hydroxyethyl acrylate (HEA), were incorporated into the cationic poly(dimethylamino ethyl methacrylate) (PDMAEMA) side-chains of amphiphilic poly(ε-caprolactone)-graft-poly(dimethylamino ethylmethacrylate) (PCD) by random co-polymerization, to obtain poly(ε-caprolactone)-graft-poly(dimethylamino ethyl methacrylate-co-2-hydroxyethyl methacrylate) (PCD-HEMA) and poly(ε-caprolactone)-graft-poly(dimethylamino ethyl methacrylate-co-2-hydroxyethyl acrylate) (PCD-HEA). Minimal HEA or HEMA moieties in PDMAEMA do not lead to statistically significant changes in particle size, zeta potential, DNA condensation properties and buffering capacity of the naked NPs. However, the incorporation of HEMA and HEA lead to reductions and increases, respectively, in the surface hydrophilicity of the naked NPs and NPs/DNA complexes, which was confirmed by water contact angle assay. These simple modifications of PDMAEMA with HEA and HEMA moieties significantly affect the gene transfection efficiency on HeLa cells in vitro: PCD-HEMA NP/DNA complexes show a much higher transfection efficiency than PCD NPs/DNA complexes, while PCD-HEA NPs/DNA complexes show a lower transfection efficiency than PCD NP/DNA complexes. Fluorescence activated cell sorter and confocal laser scanning microscope results indicate that the incorporation of hydrophobic HEMA moieties facilitates an enhancement in both cellular uptake and endosomal/lysosomal escape, leading to a higher transfection efficiency. Moreover, the process of endosomal/lysosomal escape confirmed in our research that PCD and its derivatives do not just rely on the proton sponge mechanism, but also on membrane damage due to the polycation chains, especially hydrophobic modified ones. Hence, it is proved that hydrophobic modification of cationic side-chains is a crucial route to improve gene transfection mediated by polycation NPs.
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