1
|
Xiao B, Zheng X, Zhao Y, Huang B, He P, Peng B, Chen G. Controlling Shear Rate for Designable Thermal Conductivity in Direct Ink Printing of Polydimethylsiloxane/Boron Nitride Composites. Polymers (Basel) 2023; 15:3489. [PMID: 37631546 PMCID: PMC10459169 DOI: 10.3390/polym15163489] [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: 08/02/2023] [Revised: 08/18/2023] [Accepted: 08/19/2023] [Indexed: 08/27/2023] Open
Abstract
Efficient heat dissipation is vital for advancing device integration and high-frequency performance. Three-dimensional printing, famous for its convenience and structural controllability, facilitates complex parts with high thermal conductivity. Despite this, few studies have considered the influence of shear rate on the thermal conductivity of printed parts. Herein, polydimethylsiloxane/boron nitride (PDMS/BN) composites were prepared and printed by direct ink writing (DIW). In order to ensure the smooth extrusion of the printing process and the structural stability of the part, a system with 40 wt% BN was selected according to the rheological properties. In addition, the effect of printing speed on the morphology of BN particles during 3D printing was studied by XRD, SEM observation, as well as ANSYS Polyflow simulation. The results demonstrated that increasing the printing speed from 10 mm/s to 120 mm/s altered the orientation angle of BN particles from 78.3° to 35.7°, promoting their alignment along the printing direction due to the high shear rate experienced. The resulting printed parts accordingly exhibited an impressive thermal conductivity of 0.849 W∙m-1∙K-1, higher than the 0.454 W∙m-1∙K-1 of the control sample. This study provides valuable insights and an important reference for future developments in the fabrication of thermal management devices with customizable thermal conductivity.
Collapse
Affiliation(s)
- Bing Xiao
- School of Materials Science and Engineering, Xihua University, Chengdu 610039, China; (B.X.); (X.Z.); (Y.Z.); (B.P.)
| | - Xinmei Zheng
- School of Materials Science and Engineering, Xihua University, Chengdu 610039, China; (B.X.); (X.Z.); (Y.Z.); (B.P.)
| | - Yang Zhao
- School of Materials Science and Engineering, Xihua University, Chengdu 610039, China; (B.X.); (X.Z.); (Y.Z.); (B.P.)
| | - Bingxue Huang
- School of Materials Science and Engineering, Xihua University, Chengdu 610039, China; (B.X.); (X.Z.); (Y.Z.); (B.P.)
| | - Pan He
- Sichuan Provincial Engineering Research Center of Functional Development and Application of High Performance Special Textile Materials, Chengdu Textile College, Chengdu 611731, China;
| | - Biyou Peng
- School of Materials Science and Engineering, Xihua University, Chengdu 610039, China; (B.X.); (X.Z.); (Y.Z.); (B.P.)
| | - Gang Chen
- School of Materials Science and Engineering, Xihua University, Chengdu 610039, China; (B.X.); (X.Z.); (Y.Z.); (B.P.)
- Sichuan Province Engineering Technology Research Center of Powder Metallurgy, Chengdu University, Chengdu 610106, China
| |
Collapse
|
2
|
Zhang S, He P, Jing S, Chen G, Li G, Wang Z, Han R, Li Y. Surface Roughening of Irradiation-Activated Basalt Fiber through In Situ Growth of SiO 2: Effects on Crystallization and Properties of PP Composites. MATERIALS (BASEL, SWITZERLAND) 2023; 16:5657. [PMID: 37629949 PMCID: PMC10456304 DOI: 10.3390/ma16165657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 08/07/2023] [Accepted: 08/15/2023] [Indexed: 08/27/2023]
Abstract
Basalt fiber (BF) is deemed a new environmentally friendly and high-performance fiber material due to its high strength, electrical insulation, corrosion resistance and high temperature resistance. Yet, the surface inertness restricts its practical application. In this work, the BF was irradiated and activated by electron beam, followed by in situ growth of SiO2 using a hydrothermal method, then composites with polypropylene (PP) were prepared by microinjection molding. According to the results of scanning electron microscopy (SEM) and Fourier transform infrared (FTIR), more active sites can be formed after irradiation, thus more SiO2 nanoparticles were generated on the surface of BF. Consequently, the rough surface of modified BF could provide stronger shear force during melt processing and resulted in a higher orientation of the molecular chains, increasing the lamellar thickness and generating more highly ordered β crystals in the composites. I400BF-gSiO2 exhibited the highest content of β crystals with the crystallinity of 53.62% and orientation of β (300) crystal plane of 0.91, which were 8.66% and 0.04 higher than those of the composite with pristine BF. Furthermore, due to the perfection of crystals, increased interfaces and interfacial interlocking between PP molecules and modified BF, I400BF-gSiO2 showed good overall performance, with storage modulus of 8000 MPa at -100 °C, glass transition temperature of 23.03 °C and tensile strength of 62.2 MPa, which was 1900 MPa, 1.23 °C and 29.6 MPa higher than neat PP. Hence, the surface roughing strategy proposed in this work is expected to provide some insight and promote the application of BF reinforced thermoplastic composites.
Collapse
Affiliation(s)
- Shuai Zhang
- School of Materials Science and Engineering, Xihua University, Chengdu 610039, China; (S.Z.); (G.C.); (G.L.); (Z.W.)
- Engineering Research Center of Intelligent Air-Ground Integration Vehicle and Control, Ministry of Education, Xihua University, Chengdu 610039, China
| | - Pan He
- Sichuan Provincial Engineering Research Center of Functional Development and Application of High Performance Special Textile Materials, Chengdu Textile College, Chengdu 611731, China;
| | - Shuoyi Jing
- Sichuan Special Equipment Inspection Institute, Chengdu 610100, China;
- Technology Innovation Center of Hydrogen Storage-Transportation and Fueling Equipments for State Market Regulation, Chengdu 610100, China
| | - Gang Chen
- School of Materials Science and Engineering, Xihua University, Chengdu 610039, China; (S.Z.); (G.C.); (G.L.); (Z.W.)
- Engineering Research Center of Intelligent Air-Ground Integration Vehicle and Control, Ministry of Education, Xihua University, Chengdu 610039, China
| | - Guangzhao Li
- School of Materials Science and Engineering, Xihua University, Chengdu 610039, China; (S.Z.); (G.C.); (G.L.); (Z.W.)
- Engineering Research Center of Intelligent Air-Ground Integration Vehicle and Control, Ministry of Education, Xihua University, Chengdu 610039, China
| | - Zhongzui Wang
- School of Materials Science and Engineering, Xihua University, Chengdu 610039, China; (S.Z.); (G.C.); (G.L.); (Z.W.)
- Engineering Research Center of Intelligent Air-Ground Integration Vehicle and Control, Ministry of Education, Xihua University, Chengdu 610039, China
| | - Rui Han
- School of Materials Science and Engineering, Xihua University, Chengdu 610039, China; (S.Z.); (G.C.); (G.L.); (Z.W.)
- Engineering Research Center of Intelligent Air-Ground Integration Vehicle and Control, Ministry of Education, Xihua University, Chengdu 610039, China
| | - Yijun Li
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu 610065, China
| |
Collapse
|
3
|
Wu B, Zheng X, Xu W, Ren Y, Leng H, Liang L, Zheng D, Chen J, Jiang H. β-Nucleated Polypropylene: Preparation, Nucleating Efficiency, Composite, and Future Prospects. Polymers (Basel) 2023; 15:3107. [PMID: 37514497 PMCID: PMC10383444 DOI: 10.3390/polym15143107] [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: 06/12/2023] [Revised: 07/11/2023] [Accepted: 07/17/2023] [Indexed: 07/30/2023] Open
Abstract
The β-crystals of polypropylene have a metastable crystal form. The formation of β-crystals can improve the toughness and heat resistance of a material. The introduction of a β-nucleating agent, over many other methods, is undoubtedly the most reliable method through which to obtain β-PP. Furthermore, in this study, certain newly developed β-nucleating agents and their compounds in recent years are listed in detail, including the less-mentioned polymer β-nucleating agents and their nucleation characteristics. In addition, the various influencing factors of β-nucleation efficiency, including the polymer matrix and processing conditions, are analyzed in detail and the corresponding improvement measures are summarized. Finally, the composites and synergistic toughening effects are discussed, and three potential future research directions are speculated upon based on previous research.
Collapse
Affiliation(s)
- Bo Wu
- School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan Road, Tianhe District, Guangzhou 510640, China
- Guangdong Winner New Materials Technology Co., Ltd., Gaoming District, Foshan 528521, China
- The State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, 381 Wushan Road, Tianhe District, Guangzhou 510640, China
| | - Xian Zheng
- Guangdong Winner New Materials Technology Co., Ltd., Gaoming District, Foshan 528521, China
| | - Wenjie Xu
- School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan Road, Tianhe District, Guangzhou 510640, China
- The State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, 381 Wushan Road, Tianhe District, Guangzhou 510640, China
| | - Yanwei Ren
- School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan Road, Tianhe District, Guangzhou 510640, China
- The State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, 381 Wushan Road, Tianhe District, Guangzhou 510640, China
| | - Haiqiang Leng
- Guangdong Winner New Materials Technology Co., Ltd., Gaoming District, Foshan 528521, China
| | - Linzhi Liang
- Guangdong Winner New Materials Technology Co., Ltd., Gaoming District, Foshan 528521, China
| | - De Zheng
- Guangdong Winner New Materials Technology Co., Ltd., Gaoming District, Foshan 528521, China
| | - Jun Chen
- Guangdong Winner New Materials Technology Co., Ltd., Gaoming District, Foshan 528521, China
| | - Huanfeng Jiang
- School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan Road, Tianhe District, Guangzhou 510640, China
- The State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, 381 Wushan Road, Tianhe District, Guangzhou 510640, China
| |
Collapse
|
4
|
Xu LR, Wang Q, Ni Y, Zhang G, Liu F, Zheng X, Liu Y. Significant Shear Failure Difference among Additively Manufactured Polymers Using Different Techniques. Polymers (Basel) 2022; 14:polym14194028. [PMID: 36235976 PMCID: PMC9572911 DOI: 10.3390/polym14194028] [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: 08/23/2022] [Revised: 09/09/2022] [Accepted: 09/20/2022] [Indexed: 11/16/2022] Open
Abstract
Because additively manufactured materials are increasingly being used in load-bearing structures, strength research has become critical. Surprisingly, numerous studies have reported the tensile strength measurements, but only a few studies have presented meaningful results for the shear strength measurements of additively manufactured polymers. Hence, this paper proposes a combined experimental and numerical investigation of a new interlayer shear strength measurement approach, and it targeted the applications of the same polyamide (PA12) specimens made with fused deposition modeling (FDM) and selective laser sintering (SLS). A necking-shaped shear specimen was developed to measure the pure shear strengths with the aid of a three-dimensional (3D) finite element analysis. The results showed that the specimens made with FDM and SLS exhibited totally different shear failure behaviors. The ultimate shear strength of the FDM-PA specimens had more than a 32% increase over that of the SLS-PA specimens. An interface mechanics assumption was employed to explore the different shear failure mechanisms with the support of a fractography analysis.
Collapse
Affiliation(s)
- Luoyu Roy Xu
- School of Mechanical Engineering and Mechanics, Ningbo University, Ningbo 315211, China
- MOE Key Laboratory of Impact and Safety Engineering, Ningbo University, Ningbo 315211, China
- Correspondence:
| | - Qinglin Wang
- School of Mechanical Engineering and Mechanics, Ningbo University, Ningbo 315211, China
| | - Yinxu Ni
- Zhejiang Key Laboratory of Additive Manufacturing Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315211, China
| | - Gonghe Zhang
- School of Mechanical Engineering and Mechanics, Ningbo University, Ningbo 315211, China
| | - Fenghua Liu
- Zhejiang Key Laboratory of Additive Manufacturing Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315211, China
| | - Xiaodong Zheng
- School of Mechanical Engineering and Mechanics, Ningbo University, Ningbo 315211, China
| | - Yang Liu
- School of Mechanical Engineering and Mechanics, Ningbo University, Ningbo 315211, China
- MOE Key Laboratory of Impact and Safety Engineering, Ningbo University, Ningbo 315211, China
| |
Collapse
|