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Effect of endoglucanase and high-pressure homogenization post-treatments on mechanically grinded cellulose nanofibrils and their film performance. Carbohydr Polym 2021; 253:117253. [DOI: 10.1016/j.carbpol.2020.117253] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 10/12/2020] [Accepted: 10/13/2020] [Indexed: 11/19/2022]
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Song X, Yang S, Liu X, Wu M, Li Y, Wang S. Transparent and Water-Resistant Composites Prepared from Acrylic Resins ABPE-10 and Acetylated Nanofibrillated Cellulose as Flexible Organic Light-Emitting Device Substrate. NANOMATERIALS (BASEL, SWITZERLAND) 2018; 8:E648. [PMID: 30142882 PMCID: PMC6163516 DOI: 10.3390/nano8090648] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Revised: 08/17/2018] [Accepted: 08/21/2018] [Indexed: 02/03/2023]
Abstract
Acetylated nanofibrillated cellulose (ANFC)/acrylic resin ABPE-10 composite film was prepared by impregnating ABPE-10 into ANFC films under negative pressure, which can enhance properties of ANFC films by forming an interpenetrating polymer network structure between ABPE-10 and the ANFC film. The ANFC/ABPE-10 composite film met the high performance flexible organic light-emitting diode substrate requirement, even when the ANFC dosage was as high as approximately 70%. The transparency of films with different ANFC dosages significantly increased from 67% (42 µm) to 88% (45 µm), as determined by ultraviolet-visible analysis. The composite film inherited the properties of AFNC, with a low coefficient of thermal expansion and a ductile compact structure. The contact angles of ANFC films increased from 49.2° to 102.9° after dipping in ABPE-10. Additionally, the composite films had good surface smoothness and mechanical properties.
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Affiliation(s)
- Xueping Song
- Department of Pulping and Papermaking Engineering, College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China.
- Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Guangxi University, Nanning 530004, China.
| | - Shuang Yang
- Department of Pulping and Papermaking Engineering, College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China.
- Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Guangxi University, Nanning 530004, China.
| | - Xiuyu Liu
- Department of Pulping and Papermaking Engineering, College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China.
- Department of Chemical and Paper Engineering, Western Michigan University, Kalamazoo, MI 49008-5200, USA.
| | - Min Wu
- Department of Pulping and Papermaking Engineering, College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China.
- Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Guangxi University, Nanning 530004, China.
| | - Yao Li
- Department of Pulping and Papermaking Engineering, Guangxi Vocation & Technical Institute of Industry, Nanning 530004, China.
| | - Shuangfei Wang
- Department of Pulping and Papermaking Engineering, College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China.
- Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Guangxi University, Nanning 530004, China.
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He D, Zhao C, Gou H, Li Y, Xiang D. Flame retardancy and toughening properties of epoxy composites containing ammonium polyphosphate microcapsules and expanded graphite. HIGH PERFORM POLYM 2017. [DOI: 10.1177/0954008317747952] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Ammonium polyphosphate microcapsules (BM (polybenzoxazine modified) APP) were prepared through the in situ ring-opening polymerization of allyl group containing benzoxazine monomers on the surfaces of ammonium polyphosphate (APP), and they were significantly hydrophobic than the APP. A flame retardant system of epoxy (EP) resin was prepared with BMAPP and expanded graphite (EG). Flame retardancy, the thermal degradation behavior, a mechanical property of EP and EP/BMAPP/EG composites was investigated through limited oxygen index, vertical burning test, cone calorimetry (CONE), and the thermogravimetric analysis (TGA). The flame retardancy tests indicated that the EG could improve the thermal performance, promote the charring, and enhance the char quality of EP/BMAPP. Scanning electron microscopy (SEM) and Fourier-transform infrared spectroscopy (FTIR) were employed to analyze the morphology and composition of the char residue formed during CONE testing, and to understand the mechanism of char formation. The results of TG-FTIR confirmed the possible mechanism of flame retardancy of EP/BMAPP/EG in the gas phase during combustion. The EG content effects on Young’s modulus, the tensile strength, and the fracture toughness ( KIC) of the EP/BMAPP composites were also investigated. The KIC of the composites containing 1% of EG and 10% of BMAPP increased by approximately 76% and 153%, respectively, compared to the neat matrix and EP/BMAPP-10%. The SEM images of the fractured surface indicated that the enhanced toughness of EP/BMAPP/EG composites mainly attributed to the debonding of the BMAPP and the subsequent plastic void growth of the matrix, as well as the crack deflection effect of the BMAPP/EG.
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Affiliation(s)
- Da He
- Department of Materials and Engineering, Southwest Petroleum University, Chengdu, People’s Republic of China
| | - Chunxia Zhao
- Department of Materials and Engineering, Southwest Petroleum University, Chengdu, People’s Republic of China
| | - Haolan Gou
- Department of Materials and Engineering, Southwest Petroleum University, Chengdu, People’s Republic of China
| | - Yuntao Li
- Department of Materials and Engineering, Southwest Petroleum University, Chengdu, People’s Republic of China
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, People’s Republic of China
| | - Dong Xiang
- Department of Materials and Engineering, Southwest Petroleum University, Chengdu, People’s Republic of China
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