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Wu M, Li L, Yu R, Zhang Z, Zhu B, Lin J, Zhou L, Su B. Tailored diffusion limiting membrane for microneedle glucose sensors with wide linear range. Talanta 2024; 273:125933. [PMID: 38503127 DOI: 10.1016/j.talanta.2024.125933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Revised: 02/20/2024] [Accepted: 03/14/2024] [Indexed: 03/21/2024]
Abstract
Continuous glucose monitoring is very important to daily blood glucose control in diabetic patients, but its accuracy is limited by the narrow linear range of the response of biosensor to the glucose concentration because of the oxygen starvation in tissue and the limited maximum conversion rate of glucose oxidase. In this work, a biocompatible diffusion limiting membrane based on two medical-grade polyurethanes is developed via blending modification to restrict the diffusion flux of glucose to match the oxygen concentration and the maximum conversion rate. The expansiveness of the linear range for the nanomaterials-modified electrode in the glucose biosensor can be achieved through the regulation of two polyurethanes, the solvent, and the thickness of the membrane. In addition, the mass transport of hydrogen peroxide and interfering substances is also limited of the membrane. The in vitro experiments demonstrated that the membrane-modified microneedle biosensor exhibited a rapid response to the concentration variation of glucose, a wide linear range that is sufficient to cover the blood concentration of healthy and diabetic people, the ability to resist the oxygen concentration fluctuation and interfering substances, good reproducibility and long-term stability. The custom wearable electrochemical system, possessing these characteristics, has been proven to accurately monitor the blood concentration in a living rat in real time. This demonstrates a significant potential for application in both daily and clinical blood glucose monitoring.
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Affiliation(s)
- Minfang Wu
- Department of Chemistry, Zhejiang University, Hangzhou, 310058, China; Internet of Things Research Center Advanced Institute of Information Technology, Peking University, Hangzhou, 310058, China
| | - Liang Li
- Internet of Things Research Center Advanced Institute of Information Technology, Peking University, Hangzhou, 310058, China
| | - Rongying Yu
- Internet of Things Research Center Advanced Institute of Information Technology, Peking University, Hangzhou, 310058, China
| | - Zebo Zhang
- Internet of Things Research Center Advanced Institute of Information Technology, Peking University, Hangzhou, 310058, China
| | - Boyu Zhu
- Department of Chemistry, Zhejiang University, Hangzhou, 310058, China
| | - Junshu Lin
- Internet of Things Research Center Advanced Institute of Information Technology, Peking University, Hangzhou, 310058, China
| | - Lin Zhou
- Department of Chemistry, Zhejiang University, Hangzhou, 310058, China
| | - Bin Su
- Department of Chemistry, Zhejiang University, Hangzhou, 310058, China.
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Choi IS, Kim YK, Hong SH, Seo HJ, Hwang SH, Kim J, Lim SK. Effects of Polybutylene Succinate Content on the Rheological Properties of Polylactic Acid/Polybutylene Succinate Blends and the Characteristics of Their Fibers. MATERIALS (BASEL, SWITZERLAND) 2024; 17:662. [PMID: 38591561 PMCID: PMC10856723 DOI: 10.3390/ma17030662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 01/24/2024] [Accepted: 01/26/2024] [Indexed: 04/10/2024]
Abstract
Polylactic acid (PLA) and polybutylene succinate (PBS) are gaining prominence as environmentally friendly alternatives to petroleum-based polymers due to their inherent biodegradability. For their textile applications, this research is focused on exploring the effects of PBS content on the rheological properties of PLA/PBS blends and the characteristics of PLA/PBS blend fibers. PLA/PBS blends and fibers with varying PBS contents (0 to 10 wt.%) were prepared using melt-blending and spinning methods. Uniform morphologies of the PLA/PBS blends indicated that PBS was compatible with PLA, except at 10% PBS content, where phase separation occurred. The introduction of PBS reduced the complex viscosity of the blends, influencing fiber properties. Notably, PLA/PBS fibers with 7% PBS exhibited improved crystallinity, orientation factor, and elasticity (~16.58%), with a similar tensile strength to PLA fiber (~3.58 MPa). The results suggest that an optimal amount of PBS enhances alignment along the drawing direction and improves the molecular motion in PLA/PBS blend fiber. This study highlights the potential of strategically blending PBS to improve PLA fiber characteristics, promising advancement in textile applications.
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Affiliation(s)
- Ik Sung Choi
- International Cooperation Team, Korea Textile Development Institute, Daegu 41842, Republic of Korea;
- Department of Fiber System Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea
| | - Young Kwang Kim
- Department of Energy Technology, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of Korea; (Y.K.K.); (S.H.H.); (H.-J.S.); (S.-H.H.)
| | - Seong Hui Hong
- Department of Energy Technology, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of Korea; (Y.K.K.); (S.H.H.); (H.-J.S.); (S.-H.H.)
| | - Hye-Jin Seo
- Department of Energy Technology, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of Korea; (Y.K.K.); (S.H.H.); (H.-J.S.); (S.-H.H.)
| | - Sung-Ho Hwang
- Department of Energy Technology, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of Korea; (Y.K.K.); (S.H.H.); (H.-J.S.); (S.-H.H.)
| | - Jongwon Kim
- Department of Fiber System Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea
| | - Sang Kyoo Lim
- Department of Energy Technology, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of Korea; (Y.K.K.); (S.H.H.); (H.-J.S.); (S.-H.H.)
- Department of Interdisciplinary Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of Korea
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Xing J, Wang R, Sun S, Shen Y, Liang B, Xu Z. Morphology and Properties of Polylactic Acid Composites with Butenediol Vinyl Alcohol Copolymer Formed by Melt Blending. Molecules 2023; 28:molecules28083627. [PMID: 37110861 PMCID: PMC10146402 DOI: 10.3390/molecules28083627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 04/12/2023] [Accepted: 04/19/2023] [Indexed: 04/29/2023] Open
Abstract
Due to its poor toughness and hydrophilicity, the application of polylactic acid (PLA) in the field of absorbent sanitary materials is restricted. A butenediol vinyl alcohol copolymer (BVOH) was used to improve PLA via melt blending. The morphology, molecular structure, crystallization, thermal stability, tensile property, and hydrophilicity of PLA/BVOH composites with different mass ratios were investigated. The results show that the PLA/BVOH composites possessed a two-phase structure with good interfacial adhesion. The BVOH could effectively blend into PLA without a chemical reaction. The addition of the BVOH promoted the crystallization of PLA, improved the perfection of the crystalline region, and increased the glass transition temperature and melting temperature of PLA in the heating process. Moreover, the thermal stability of PLA was markedly improved by adding the BVOH. The addition of the BVOH also had a significant effect on the tensile property of the PLA/BVOH composites. When the content of the BVOH was 5 wt.%, the elongation at the break of the PLA/BVOH composites could reach 9.06% (increased by 76.3%). In addition, the hydrophilicity of PLA was also significantly improved, and the water contact angles decreased with the increase in the BVOH content and time. When the content of the BVOH was 10 wt.%, the water contact angle could reach 37.3° at 60 s, suggesting good hydrophilicity.
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Affiliation(s)
- Jian Xing
- International Cooperation Research Center of Textile Structure Composite Materials, School of Textile & Garment, Anhui Polytechnic University, Wuhu 241000, China
- Anhui Weiyi Textile Co., Ltd., Bozhou 236000, China
| | - Rongrong Wang
- International Cooperation Research Center of Textile Structure Composite Materials, School of Textile & Garment, Anhui Polytechnic University, Wuhu 241000, China
| | - Shaoyang Sun
- International Cooperation Research Center of Textile Structure Composite Materials, School of Textile & Garment, Anhui Polytechnic University, Wuhu 241000, China
| | - Ying Shen
- International Cooperation Research Center of Textile Structure Composite Materials, School of Textile & Garment, Anhui Polytechnic University, Wuhu 241000, China
| | - Botao Liang
- Anhui Weiyi Textile Co., Ltd., Bozhou 236000, China
| | - Zhenzhen Xu
- International Cooperation Research Center of Textile Structure Composite Materials, School of Textile & Garment, Anhui Polytechnic University, Wuhu 241000, China
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Research Progress of Elastomer Materials and Application of Elastomers in Drilling Fluid. Polymers (Basel) 2023; 15:polym15040918. [PMID: 36850203 PMCID: PMC9959665 DOI: 10.3390/polym15040918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 02/10/2023] [Accepted: 02/10/2023] [Indexed: 02/16/2023] Open
Abstract
An elastomer is a material that undergoes large deformation under force and quickly recovers its approximate initial shape and size after withdrawing the external force. Furthermore, an elastomer can heal itself and increase volume when in contact with certain liquids. They have been widely used as sealing elements and packers in different oil drilling and development operations. With the development of drilling fluids, elastomer materials have also been gradually used as drilling fluid additives in drilling engineering practices. According to the material type classification, elastomer materials can be divided into polyurethane elastomer, epoxy elastomer, nanocomposite elastomer, rubber elastomer, etc. According to the function classification, elastomers can be divided into self-healing elastomers, expansion elastomers, etc. This paper systematically introduces the research progress of elastomer materials based on material type classification and functional classification. Combined with the requirements for drilling fluid additives in drilling fluid application practice, the application prospects of elastomer materials in drilling fluid plugging, fluid loss reduction, and lubrication are discussed. Oil-absorbing expansion and water-absorbing expansion elastomer materials, such as polyurethane, can be used as lost circulation materials, and enter the downhole to absorb water or absorb oil to expand, forming an overall high-strength elastomer to plug the leakage channel. When graphene/nano-composite material is used as a fluid loss additive, flexibility and elasticity facilitate the elastomer particles to enter the pores of the filter cake under the action of differential pressure, block a part of the larger pores, and thus, reduce the water loss, while it would not greatly change the rheology of drilling fluid. As a lubricating material, elastic graphite can form a protective film on the borehole wall, smooth the borehole wall, behaving like a scaly film, so that the sliding friction between the metal surface of the drill pipe and the casing becomes the sliding friction between the graphite flakes, thereby reducing the friction of the drilling fluid. Self-healing elastomers can be healed after being damaged by external forces, making drilling fluid technology more intelligent. The research and application of elastomer materials in the field of drilling fluid will promote the ability of drilling fluid to cope with complex formation changes, which is of great significance in the engineering development of oil and gas wells.
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Wang G, Zhang L, Wang J, Hao X, Dong Y, Sun R. Ductile polylactic acid-based blend derived from bio-based poly(butylene adipate-co-butylene furandicarboxylate). Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-022-04532-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Wang Z, Zhao Y, Wei Y. Syntheses and properties of tri- and multi-block copolymers consisting of polybutadiene and polylactide segments. RSC Adv 2022; 12:29777-29784. [PMID: 36321098 PMCID: PMC9577476 DOI: 10.1039/d2ra05051j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Accepted: 10/11/2022] [Indexed: 11/07/2022] Open
Abstract
Biomaterials have drawn considerable attention in recent years because of environmental concerns. In this paper, several different poly(lactide)-b-poly(butadiene)-b-poly(lactide) (PLA-b-PB-b-PLA) triblock copolymers were synthesized by the bulk ring-opening polymerization of lactide initiated by flexible macro-initiator hydroxyl-terminated polybutadiene (HTPB) by adjusting the ratio of HTPB to lactide and the optical isomer of lactide. Afterwards, a chain-extension reaction with hexamethylene diisocyanate (HDI) was carried out to prepare (PLA-b-PB-b-PLA)n multi-block copolymers with enhanced molecular weight. The structures and properties of these block copolymers were then characterized by gel permeation chromatography (GPC), nuclear magnetic resonance (NMR), differential scanning calorimetry (DSC), atomic force microscope (AFM) and Fourier-transform infrared (FTIR). Toughening effect of the (PLA-b-PB-b-PLA)n multiblock copolymers on biodegradable poly(l-lactide) (PLLA) film was investigated and the blended film with higher (poly(d-lactide)-b-poly(butadiene)-b-poly(d-lactide))n (PDLA-b-PB-b-PDLA)n loading (15 wt%) exhibited better toughness nearly without loss of the tensile strength. The mechanical properties of the (PLA-b-PB-b-PLA)n/PLLA blended film were proved to be influenced by the different isomers of PLA and rubbery PB chains. Toughen effect of the multiblock copolymers (PLA-b-PB-b-PLA)n on PLLA was investigated and the mechanical properties of the blended films were proved to be influenced by the optical isomers of PLA, stereocomplexation and the rubbery PB chains.![]()
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Affiliation(s)
- Zhengyue Wang
- School of Polymer Science & Engineering, Qingdao University of Science and TechnologyQingdao266042China+86 053284022927
| | - Yue Zhao
- School of Polymer Science & Engineering, Qingdao University of Science and TechnologyQingdao266042China+86 053284022927
| | - Yuhan Wei
- School of Polymer Science & Engineering, Qingdao University of Science and TechnologyQingdao266042China+86 053284022927
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Chang FL, Hu B, Huang WT, Chen L, Yin XC, Cao XW, He GJ. Improvement of rheology and mechanical properties of PLA/PBS blends by in-situ UV-induced reactive extrusion. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Song L, Zhang Q, Hao Y, Cong F, Chi W, Li Y, Liu Z, Shi Y. Influence of the structure of sub‐micrometer core‐shell rubber particles and matrix composition on the mechanical properties, morphological structure and deformation mechanism of rubber‐modified polyphenylene oxide/polystyrene blends. J Appl Polym Sci 2022. [DOI: 10.1002/app.53032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Lixin Song
- Advanced Manufacturing Institute of Polymer Industry Shenyang University of Chemical Technology Shenyang China
- College of Materials Science and Engineering Shenyang University of Chemical Technology Shenyang China
| | - Qian Zhang
- Advanced Manufacturing Institute of Polymer Industry Shenyang University of Chemical Technology Shenyang China
- College of Materials Science and Engineering Shenyang University of Chemical Technology Shenyang China
| | - Yongsheng Hao
- Advanced Manufacturing Institute of Polymer Industry Shenyang University of Chemical Technology Shenyang China
- College of Materials Science and Engineering Shenyang University of Chemical Technology Shenyang China
| | - Fei Cong
- Advanced Manufacturing Institute of Polymer Industry Shenyang University of Chemical Technology Shenyang China
- College of Materials Science and Engineering Shenyang University of Chemical Technology Shenyang China
| | - Weihan Chi
- Advanced Manufacturing Institute of Polymer Industry Shenyang University of Chemical Technology Shenyang China
- College of Materials Science and Engineering Shenyang University of Chemical Technology Shenyang China
| | - Yongchao Li
- Advanced Manufacturing Institute of Polymer Industry Shenyang University of Chemical Technology Shenyang China
- College of Materials Science and Engineering Shenyang University of Chemical Technology Shenyang China
| | - Zhe Liu
- Advanced Manufacturing Institute of Polymer Industry Shenyang University of Chemical Technology Shenyang China
- College of Materials Science and Engineering Shenyang University of Chemical Technology Shenyang China
| | - Ying Shi
- Advanced Manufacturing Institute of Polymer Industry Shenyang University of Chemical Technology Shenyang China
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Okpuwhara RO, Oboirien BO, Sadiku ER. The lanolin‐based oil plasticized polylactide: Thermal and chemical characteristics. POLYM ENG SCI 2022. [DOI: 10.1002/pen.25945] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Rita O. Okpuwhara
- Department of Chemical Engineering University of Johannesburg Johannesburg South Africa
| | - Bilainu O. Oboirien
- Department of Chemical Engineering University of Johannesburg Johannesburg South Africa
| | - Emmanuel R. Sadiku
- Institute of Nano Engineering Research (INER), Department of Chemical, Metallurgical and Materials Engineering, Polymer Division Tshwane University of Technology Pretoria South Africa
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10
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Preparation of novel functionalized carbon nanotubes and composite application in polyurethane elastomers. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-022-04083-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Zhao X, Li J, Liu J, Zhou W, Peng S. Recent progress of preparation of branched poly(lactic acid) and its application in the modification of polylactic acid materials. Int J Biol Macromol 2021; 193:874-892. [PMID: 34728305 DOI: 10.1016/j.ijbiomac.2021.10.154] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 09/30/2021] [Accepted: 10/20/2021] [Indexed: 01/01/2023]
Abstract
Poly (lactic acid) (PLA) with branched structure has abundant terminal groups, high melt strength, good rheological properties, and excellent processability; it is a new research and application direction of PLA materials. This study mainly summarizes the molecular structure design, preparation methods, basic properties of branched PLA, and its application in modified PLA materials. The structure and properties of branched PLA prepared by ring-opening polymerization of monomer, functional group polycondensation, and chain extender in the processing process were introduced. The research progress of in situ formation of branched PLA by initiators, multifunctional monomers/additives through dynamic vulcanization, and irradiation induction was described. The effect of branched PLA on the structure and properties of linear PLA materials was analyzed. The role of branched PLA in improving the crystallization behavior, phase morphology, foaming properties, and mechanical properties of linear PLA materials was discussed. At the same time, its research progress in biomedicine and tissue engineering was analyzed. Branched PLA has excellent compatibility with PLA, which has important research value in regulating the structure and properties of PLA materials.
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Affiliation(s)
- Xipo Zhao
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light-weight Materials and Processing, Hubei University of Technology, Wuhan 430068, China.
| | - Juncheng Li
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light-weight Materials and Processing, Hubei University of Technology, Wuhan 430068, China
| | - Jinchao Liu
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light-weight Materials and Processing, Hubei University of Technology, Wuhan 430068, China
| | - Weiyi Zhou
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light-weight Materials and Processing, Hubei University of Technology, Wuhan 430068, China
| | - Shaoxian Peng
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light-weight Materials and Processing, Hubei University of Technology, Wuhan 430068, China.
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