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Chen J, Hu M, Li Y, Li R, Qing L. Significant Influence of Bound Rubber Thickness on the Rubber Reinforcement Effect. Polymers (Basel) 2023; 15:polym15092051. [PMID: 37177198 PMCID: PMC10181254 DOI: 10.3390/polym15092051] [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: 02/26/2023] [Revised: 04/19/2023] [Accepted: 04/23/2023] [Indexed: 05/15/2023] Open
Abstract
In this work, the contribution of different types of carbon blacks (N115, N330, N550, N660) and their primary and secondary thermally cracked recovered carbon blacks to the mechanical properties of NR composites was evaluated. The thermally cracked recovered carbon blacks were prepared by cracking the rubber composites at 500 °C and de-hybridizing them at 900 °C. The characterization of the thermally cracked recovered carbon blacks by scanning electron microscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy showed that carbon blacks after primary and secondary thermal cracking recovery were more prone to aggregation and exhibited a higher degree of carbon defects. The number and type of functional groups on the surface of these carbon blacks were significantly reduced. For NR composites with pristine samples added, the mechanical properties and the bound rubber content tests showed that the mechanical properties of the NR composites became weaker with the increase in carbon black particle size. The bound rubber content also decreased with increased carbon black particle size. The mechanical properties of the NR composites reinforced with carbon black recovered by primary and secondary thermal cracking would therefore decrease. The results of AFM and DSC tests further confirmed the decreasing trend of bound rubber. The present work demonstrates the effect of bound rubber content variation on the mechanical properties of rubber, demonstrates the morphology of bound rubber more visually, and provides new insights into the reinforcement theory of CB.
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Affiliation(s)
- Jian Chen
- School of Materials Science and Engineering, Sichuan University of Science & Engineering, Zigong 643000, China
- Material Corrosion and Protection Key Laboratory of Sichuan Province, Zigong 643000, China
| | - Maoyuan Hu
- School of Materials Science and Engineering, Sichuan University of Science & Engineering, Zigong 643000, China
- Material Corrosion and Protection Key Laboratory of Sichuan Province, Zigong 643000, China
| | - Yuming Li
- School of Materials Science and Engineering, Sichuan University of Science & Engineering, Zigong 643000, China
- Material Corrosion and Protection Key Laboratory of Sichuan Province, Zigong 643000, China
| | - Rui Li
- School of Materials Science and Engineering, Sichuan University of Science & Engineering, Zigong 643000, China
- Material Corrosion and Protection Key Laboratory of Sichuan Province, Zigong 643000, China
| | - Long Qing
- School of Materials Science and Engineering, Sichuan University of Science & Engineering, Zigong 643000, China
- Material Corrosion and Protection Key Laboratory of Sichuan Province, Zigong 643000, China
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Zheng Z, Yang L, Yang Y, Li L, Lin B, Fu L, Xu C. Flexible, sensitive and rapid humidity-responsive sensor based on rubber/aldehyde-modified sodium carboxymethyl starch for human respiratory detection. Carbohydr Polym 2023; 306:120625. [PMID: 36746577 DOI: 10.1016/j.carbpol.2023.120625] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 01/16/2023] [Accepted: 01/23/2023] [Indexed: 01/27/2023]
Abstract
Natural polymers with abundant hydrophilic groups are potential candidates for humidity sensor designing. Unfortunately, most of natural polymers lack essential stretchability and high conductivity, which hinder their development in the field of flexible humidity sensor. Cooperation with rubbers and conductive nanometer materials is an effective method to make the best use of natural polymers in flexible humidity sensor. In this paper, a flexible and sensitive sensor with rapid response to humidity change is fabricated based on aldehyde-modified sodium carboxymethyl starch (ACMS), carboxylated styrene-butadiene rubber (XSBR) and Ag nanoflakes through film-forming method. The pre-prepared ACMS owns a better dispersibility in the aqueous phase and serves as reducing agent for formation of Ag nanoflakes. After the film-forming process, the composite film shows a strength of 5.66 MPa and a high stretchability with strain of 367 %. Besides, our sensor shows a rapider response to humidity change than the commercial electronic hygrometer that it takes only 1 s to respond to the humidity change from 25 % RH to 27 % RH. Therefore, the XSBR/ACMS/Ag sensor possesses an impressive sensitive response to slight sweat on human skin and breath, which could find applications in monitoring people's health and distinguish their physical condition.
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Affiliation(s)
- Zhongjie Zheng
- Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Li Yang
- Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Yunpeng Yang
- Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Luji Li
- Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Baofeng Lin
- Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Lihua Fu
- Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Chuanhui Xu
- Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China..
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Chang K, Yan Y, Zhang D, Xia Y, Chen X, Lei L, Shi S. Synergistic Bonding of Poly( N-isopropylacrylamide)-Based Hybrid Microgels and Gold Nanoparticles Used for Temperature-Responsive Controllable Catalysis of p-Nitrophenol Reduction. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:2408-2421. [PMID: 36725677 DOI: 10.1021/acs.langmuir.2c03236] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Stimuli-responsive hybrid nanoparticles used for controllable catalysis have been attracting increasing attention. This study aims to prepare hybrid microgels with excellent temperature-sensitive colorimetric and catalytic properties through combining the surface plasmon resonance properties of gold nanoparticles (AuNPs) with the temperature-sensitive properties of poly(N-isopropylacrylamide) (PNIPAM)-based microgels. Microgels with hydroxy groups (MG-OH) were prepared by soap-free emulsion polymerization, using N-isopropylacrylamide as the main monomer, hydroxyethyl methylacrylate as the functional monomer, N,N'-methylene bisacrylamide as the crosslinker, and 2,2'-azobis(2-methylpropionamidine) dihydrochloride as an initiator to ensure the microgels are positively charged. Furthermore, chemical modification on the surface of MG-OH was carried out by 3-mercaptopropyltriethoxysilane to obtain thiolated microgels (MG-SH). Two kinds of hybrid nanoparticles, AuNPs@MG-OH and AuNPs@MG-SH, were self-assembled, through electrostatic interaction between positive MG-OH and negative citrate-stabilized AuNPs as well as through synergistic bonding of electrostatic interaction and Au-S bonding between positive MG-SH and negative AuNPs. The morphology, stability, temperature-sensitive colorimetric properties, and catalytic properties of hybrid microgels were systematically investigated. Results showed that although both AuNPs@MG-OH and AuNPs@MG-SH exhibit good temperature-sensitive colorimetric properties and controllable catalytic properties for the reduction reaction of p-nitrophenol, AuNPs@MG-SH with synergistic bonding has better stability and higher catalytic performance than AuNPs@MG-OH. This work has good competitiveness against known PNIPAM-based materials and may provide an effective method for preparing smart catalysts by self-assembly with stimuli-responsive polymers, which has a great potential application for catalyzing a variety of reactions.
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Affiliation(s)
- Kangkang Chang
- College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing100029, China
| | - Yutian Yan
- College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing100029, China
| | - Dong Zhang
- College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing100029, China
| | - Yuzheng Xia
- College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing100029, China
| | - Xiaonong Chen
- College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing100029, China
| | - Lei Lei
- College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing100029, China
| | - Shuxian Shi
- College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing100029, China
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Jiang G, Dong W, Liao K. Synthesis of alkynyl phosphite ligands and its application in the preparation of high stability one‐component heat‐curable silicone rubber. J Appl Polym Sci 2022. [DOI: 10.1002/app.53398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Guo Jiang
- Key Laboratory for Polymer Processing Engineering of Ministry of Education, Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing South China University of Technology Guangzhou China
| | - Wenyong Dong
- Key Laboratory for Polymer Processing Engineering of Ministry of Education, Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing South China University of Technology Guangzhou China
| | - Kai Liao
- Key Laboratory for Polymer Processing Engineering of Ministry of Education, Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing South China University of Technology Guangzhou China
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Yang Y, Xu H, Li M, Li Z, Zhang H, Guo B, Zhang J. Antibacterial Conductive UV-Blocking Adhesion Hydrogel Dressing with Mild On-Demand Removability Accelerated Drug-Resistant Bacteria-Infected Wound Healing. ACS APPLIED MATERIALS & INTERFACES 2022; 14:41726-41741. [PMID: 36089750 DOI: 10.1021/acsami.2c10490] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The on-demand replacement of multifunctional hydrogel wound dressings helps to avoid bacterial colonization, and the on-demand painless peeling of tissue adhesive hydrogels on the wound site remains a major challenge to be solved. In this work, we design and develop a series of multifunctional dynamic Schiff base network hydrogels composed of cystamine-modified hyaluronic acid, benzaldehyde-functionalized poly(ethylene glycol)-co-poly(glycerol sebacate), and polydopamine@polypyrrole nanocomposite (PDA@PPy) with mild on-demand removability to enhance drug-resistant bacteria-infected wound healing. These hydrogels exhibited ideal injectable and self-healing properties, excellent tissue adhesion, in vivo hemostasis, good antioxidation, and conductivity. PDA@PPy inspired by melanin endows hydrogels with excellent antioxidant capacity, UV-blocking ability, and photothermal anti-infection ability. Based on the dynamic oxidation-reduction response of disulfide bonds inspired by the dissociation of the tertiary spatial structure transformation of poly-polypeptide chains, these hydrogels can achieve rapid painless on-demand removal under mild conditions by adding dithiothreitol. These multifunctional hydrogels significantly promoted collagen deposition and angiogenesis in the MRSA-infected full-thickness skin repair experiment. All the results showed that these multifunctional hydrogels with painless on-demand removal property showed great potential in clinical treatment of infected wounds.
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Affiliation(s)
- Yutong Yang
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an 710049, China
- State Key Laboratory for Mechanical Behavior of Materials, and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China
| | - Huiru Xu
- State Key Laboratory for Mechanical Behavior of Materials, and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China
| | - Meng Li
- State Key Laboratory for Mechanical Behavior of Materials, and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China
| | - Zhenlong Li
- State Key Laboratory for Mechanical Behavior of Materials, and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China
| | - Hualei Zhang
- State Key Laboratory for Mechanical Behavior of Materials, and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China
| | - Baolin Guo
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an 710049, China
- State Key Laboratory for Mechanical Behavior of Materials, and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China
| | - Jie Zhang
- Institute of Preventive Medicine, Fourth Military Medical University, Xi'an 710032, China
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Dou Y, Sun S, Lu S, Yao W, Guan D. Preparation of carbon black/silicone rubber composites with large-area-homogeneous-low electrical-resistance used as electroplating matrix. RSC Adv 2022; 12:32448-32458. [DOI: 10.1039/d2ra06510j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Accepted: 11/07/2022] [Indexed: 11/13/2022] Open
Abstract
Carbon black/silicone rubber composites with large-area-homogeneous-low electrical-resistance used as electroplating matrix and its fine electro-deposited Ni layer.
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Affiliation(s)
- Yanli Dou
- The Ministry of Education Key Laboratory of Automotive Material, College of Material Science and Engineering, Jilin University, Changchun, 130025, PR China
| | - Shixiang Sun
- The Ministry of Education Key Laboratory of Automotive Material, College of Material Science and Engineering, Jilin University, Changchun, 130025, PR China
| | - Shanshan Lu
- China FAW Group Corporation R and D Center, First Automobile Works Group Corporation Research and Development Center, Changchun, 130000, PR China
| | - Weiguo Yao
- The Ministry of Education Key Laboratory of Automotive Material, College of Material Science and Engineering, Jilin University, Changchun, 130025, PR China
| | - Dongbo Guan
- The Ministry of Education Key Laboratory of Automotive Material, College of Material Science and Engineering, Jilin University, Changchun, 130025, PR China
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