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Design of silk fibroin-based supramolecular hydrogels through host-guest interactions: Influence of the crosslinking type. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Wang S, Pei X, Luo Y, Chu G, Zou H, Sun B. Preparation of lithium carbonate by microwave assisted pyrolysis. Chin J Chem Eng 2022. [DOI: 10.1016/j.cjche.2022.01.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Top-down extraction of surface carboxylated-silk nanocrystals and application in hydrogel preparation. Int J Biol Macromol 2021; 174:162-174. [PMID: 33513425 DOI: 10.1016/j.ijbiomac.2021.01.159] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 01/21/2021] [Accepted: 01/23/2021] [Indexed: 11/21/2022]
Abstract
Bionanomaterial based hydrogels originated from natural biopolymer have drawn much attention for advanced applications. However, nanosilk-based hydrogels derived from top-down approaches remain in their infancy. First, nanosilks based on existing methods fail to prepare hydrogels; second, both nanosilk extraction and surface modification remain a challenge due to high crystallinity and sophisticated hierarchical structures. To produce nanosilk-based hydrogels, pretreatment and oxidation are necessary. In this work, pretreatments were conducted first to loosen the sophisticated structures of natural silk fibers, NaClO oxidation was utilized in succession to introduce carboxyl groups onto silk fibroin. Combined with moderate mechanical disintegration, silk nanocrystals with additional carboxyl groups were prepared facilely. Finally, silk nanocrystal-based hydrogels were prepared successfully through gas phase coagulation. An optimization of pretreatment approaches and oxidation conditions was carried out. The morphologies, chemical and crystalline structures of original, pretreated and oxidized silk fibroin as well as nanofibrillated silk were investigated. In addition, the silk nanocrystal-based hydrogel exhibited outstanding mechanical properties compared to those of dissolved and regenerated silk fibroin-based hydrogels. Moreover, silk nanocrystal-based aerogels present highly porous, interconnected, and crisscrossed network nanostructures, which are ideal candidates for tissue regeneration and provide new prospects as porous scaffolds for bioengineering applications.
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Lv S. Silk Fibroin-Based Materials for Catalyst Immobilization. Molecules 2020; 25:E4929. [PMID: 33114465 PMCID: PMC7663501 DOI: 10.3390/molecules25214929] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 10/10/2020] [Accepted: 10/20/2020] [Indexed: 11/17/2022] Open
Abstract
Silk fibroin is a widely and commercially available natural protein derived from silkworm cocoons. Thanks to its unique amino acid composition and structure, which lead to localized nanoscale pockets with limited but sufficient hydration for protein interaction and stabilization, silk fibroin has been studied in the field of enzyme immobilization. Results of these studies have demonstrated that silk fibroin offers an important platform for covalent and noncovalent immobilization of enzymes through serving as a stabilization matrix/support with high retention of the biological activity of the enzymes of interest. In the hope of providing suggestions for potential future research directions, this review has been written to briefly introduce and summarize key advances in silk fibroin-based materials for immobilization of both enzymes/biocatalysts (including alkaline phosphatase, β-glucosidase, glucose oxidase, lipase, urease, uricase, horseradish peroxidase, catalase, xanthine oxidase, tyrosinase, acetylcholinesterase, neutral protease, α-chymotrypsin, amylase, organophosphorus hydrolase, β-galactosidase, carbonic anhydrase, laccase, zymolyase, phenylalanine ammonia-lyase, thymidine kinase, and several others) and non-enzymatic catalysts (such as Au, Pd, Fe, α-Fe2O3, Fe3O4, TiO2, Pt, ZnO, CuO, Cu2O, Mn3O4, and MnO2).
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Affiliation(s)
- Shanshan Lv
- State Key Laboratory of Organic-Inorganic Composite Materials, College of Chemical Engineering, Beijing University of Chemical Technology, 15 BeisanhuanDong Road, Chaoyang District, Beijing 100029, China
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Chen RJ, Qiao N, Arowo M, Zou HK, Chu GW, Luo Y, Sun BC, Chen JF. Modeling for Temperature Distribution of Water in a Multiwaveguide Microwave Reactor. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.9b04748] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ru-Jia Chen
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, P.O. Box 35, No. 15 Bei San Huan Dong Road, Beijing 100029, China
- Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, No. 15 Bei San Huan Dong Road, Beijing 100029, China
| | - Ning Qiao
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, P.O. Box 35, No. 15 Bei San Huan Dong Road, Beijing 100029, China
- Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, No. 15 Bei San Huan Dong Road, Beijing 100029, China
| | - Moses Arowo
- Department of Chemical & Process Engineering, Moi University, Eldoret 3900-30100, Kenya
| | - Hai-Kui Zou
- Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, No. 15 Bei San Huan Dong Road, Beijing 100029, China
| | - Guang-Wen Chu
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, P.O. Box 35, No. 15 Bei San Huan Dong Road, Beijing 100029, China
- Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, No. 15 Bei San Huan Dong Road, Beijing 100029, China
| | - Yong Luo
- Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, No. 15 Bei San Huan Dong Road, Beijing 100029, China
| | - Bao-Chang Sun
- Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, No. 15 Bei San Huan Dong Road, Beijing 100029, China
| | - Jian-Feng Chen
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, P.O. Box 35, No. 15 Bei San Huan Dong Road, Beijing 100029, China
- Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, No. 15 Bei San Huan Dong Road, Beijing 100029, China
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Umuhoza D, Yang F, Long D, Hao Z, Dai J, Zhao A. Strategies for Tuning the Biodegradation of Silk Fibroin-Based Materials for Tissue Engineering Applications. ACS Biomater Sci Eng 2020; 6:1290-1310. [DOI: 10.1021/acsbiomaterials.9b01781] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Diane Umuhoza
- State Key Laboratory of Silkworm Genome Biology, Key Laboratory for Sericulture Functional Genomics and Biotechnology of Agricultural Ministry, Southwest University, Chongqing 400716, People’s Republic of China
- Commercial Insect Program, Sericulture, Rwanda Agricultural Board, 5016 Kigali, Rwanda
| | - Fang Yang
- Department of Biomaterials, Radboud University Medical Center, 6500 HB Nijmegen, The Netherlands
| | - Dingpei Long
- State Key Laboratory of Silkworm Genome Biology, Key Laboratory for Sericulture Functional Genomics and Biotechnology of Agricultural Ministry, Southwest University, Chongqing 400716, People’s Republic of China
| | - Zhanzhang Hao
- State Key Laboratory of Silkworm Genome Biology, Key Laboratory for Sericulture Functional Genomics and Biotechnology of Agricultural Ministry, Southwest University, Chongqing 400716, People’s Republic of China
| | - Jing Dai
- State Key Laboratory of Silkworm Genome Biology, Key Laboratory for Sericulture Functional Genomics and Biotechnology of Agricultural Ministry, Southwest University, Chongqing 400716, People’s Republic of China
| | - Aichun Zhao
- State Key Laboratory of Silkworm Genome Biology, Key Laboratory for Sericulture Functional Genomics and Biotechnology of Agricultural Ministry, Southwest University, Chongqing 400716, People’s Republic of China
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Xiao M, Lv S. Self-Assembled Regenerated Silk Fibroin Microsphere-Embedded Fe 3O 4 Magnetic Nanoparticles for Immobilization of Zymolyase. ACS OMEGA 2019; 4:21612-21619. [PMID: 31867558 PMCID: PMC6921612 DOI: 10.1021/acsomega.9b03491] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2019] [Accepted: 11/20/2019] [Indexed: 05/17/2023]
Abstract
Cytoplasm of Saccharomyces cerevisiae yeast cells contains a significant amount of desired intracellular products for both industrial utility and academic research. To recover intracellular compounds, it is necessary to break the yeast cells with high efficiency, which, under certain circumstances, requires the use of the lytic enzyme zymolyase to completely digest the cell walls. A promising strategy for zymolyase immobilization on silk fibroin (SF) was developed. SF/Fe3O4 magnetic microspheres (MMs) were constructed by solvent (ethanol)-induced self-assembly of SF surrounding Fe3O4 magnetic nanoparticles (MNs), which were synthesized by a coprecipitation method. Zymolyase was covalently bonded on the surface of the SF/Fe3O4 MMs by a photochemical cross-linking method to produce robust biocatalysts of zymolyase/SF/Fe3O4. The chemical, magnetic, and morphological properties of the MM supports and the immobilized zymolyase were investigated. Enzymolysis results demonstrated that the immobilized zymolyase showed good activity and stability for digesting yeast cell walls, and the biocatalyst can be readily recycled through convenient magnetic separation for reuse. At the optimum pH = 7.5, the immobilized zymolyase maintained 84% of the activity of the free zymolyase and retained 41% of its initial activity after four times of reuse. At unfavorable acidic pH = 4, the immobilized zymolyase retained 81% of its initial activity, while the free zymolyase showed no significant activity. Consequently, the SF/Fe3O4 MMs exhibit superior performance in terms of immobilizing enzymes, which have a good prospect in the biological application.
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Affiliation(s)
- Menglin Xiao
- State Key Laboratory of Organic-Inorganic
Composite Materials, Beijing University
of Chemical Technology, 15 BeisanhuanDong Road, Chaoyang District, Beijing 100029, China
| | - Shanshan Lv
- State Key Laboratory of Organic-Inorganic
Composite Materials, Beijing University
of Chemical Technology, 15 BeisanhuanDong Road, Chaoyang District, Beijing 100029, China
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Liu L, Han Y, Lv S. Design of Self-Healing and Electrically Conductive Silk Fibroin-Based Hydrogels. ACS APPLIED MATERIALS & INTERFACES 2019; 11:20394-20403. [PMID: 31074612 DOI: 10.1021/acsami.9b04871] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Self-healing and electrically conductive silk fibroin (SF)-based hydrogels were developed based on the dynamic assembly/disassembly nature of supramolecular complexes and the conductive nature of polypyrrole (PPy). The self-healing properties of the hydrogels were achieved through host-guest interactions between β-cyclodextrin and amino acid side chains (tyrosine, tryptophan, phenylalanine, and histidine) on SF. PPy deposition was achieved via in situ polymerization of pyrrole using ammonium persulfate as an oxidant and laccase as a catalyst. The PPy-coated hydrogels behaved as an elastomer and displayed excellent electrical properties, with adjustable electrical conductivities ranging from 0.8 ± 0.2 to (1.0 ± 0.3) × 10-3 S·cm-1. Furthermore, possibility of potential utilization of the hydrogels in electrochemistry applications as flexible yet self-healable electrode materials was explored. This study not only shows great potential in expanding the role of silk-based devices for various applications but also provides a useful approach for designing multifunctional self-healing protein-based hydrogels.
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Affiliation(s)
- Lichao Liu
- State Key Laboratory of Organic-Inorganic Composite Materials, College of Chemical Engineering , Beijing University of Chemical Technology , 15 BeisanhuanDong Road , Chaoyang District, Beijing 100029 , China
| | - Yueying Han
- State Key Laboratory of Organic-Inorganic Composite Materials, College of Chemical Engineering , Beijing University of Chemical Technology , 15 BeisanhuanDong Road , Chaoyang District, Beijing 100029 , China
| | - Shanshan Lv
- State Key Laboratory of Organic-Inorganic Composite Materials, College of Chemical Engineering , Beijing University of Chemical Technology , 15 BeisanhuanDong Road , Chaoyang District, Beijing 100029 , China
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