scholarly journals Effects of boron nitride nanotube content on waterborne polyurethane–acrylate composite coating materials

RSC Advances ◽  
2021 ◽  
Vol 11 (21) ◽  
pp. 12748-12756
Author(s):  
Yong Joon Lee ◽  
Yunju La ◽  
Ok Sung Jeon ◽  
Hak Ji Lee ◽  
Min Kyoon Shin ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Boron Nitride ◽  
Composite Coating ◽  
Chemical Resistance ◽  
Waterborne Polyurethane ◽  
Boron Nitride Nanotubes ◽  
Boron Nitride Nanotube ◽  
Coating Materials ◽  
Polyurethane Acrylate ◽  
Waterborne Polyurethane Acrylate

Composite coating materials consisting of waterborne polyurethane–acrylate (WPUA) and boron nitride nanotubes (BNNTs) showed enhanced mechanical properties, thermal properties and chemical resistance.

Synthesis and Properties of Waterborne Polyurethane-Acrylate Hybrid Emulsion Modified by Organic Silicane

2011 ◽  
Vol 287-290 ◽  
pp. 1532-1537 ◽  
Author(s):  
Xiao Juan Lai ◽  
Yi Ding Shen ◽  
Lei Wang
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Tensile Strength ◽  
Mass Fraction ◽  
Waterborne Polyurethane ◽  
Ethyl Acrylate ◽  
Isophorone Diisocyanate ◽  
Elongation At Break ◽  
Polyurethane Acrylate ◽  
Waterborne Polyurethane Acrylate

Waterborne polyurethane emulsions were synthesized with isophorone diisocyanate(IPDI), dihydromethyl propionic acid(DMPA) and poly-ε-caprolactone glycol(PCL), and then reacted with hydroxy-ethyl acrylate(HEA) and 3-aminopropyltriethoxylsilane(APTES) to cap the terminal -NCO groups. The polyurethane emulsions were used to copolymerize with acrylates to synthesize the modified waterborne polyurethane-acrylate hybrid emulsions. The structure, thermal stability and crystallinity of modified polyurethane were studied by FTIR, TG, XRD and the mechanical properties of modified polyurethane films was also investigated. The results show that crystallization of the modified waterborne polyurethane decreases and thermal stability is improved. When the mass fraction of acrylate is 20% and APTES content is 15%, tensile strength of the modified polyurethane films can reach 23.9MPa and elongation at break is 247%.

scholarly journals Characterization of mechanical properties of stab-resistant angle-ply flexible composites

2020 ◽  
Vol 15 ◽  
pp. 155892502093555
Author(s):  
Mengjin Wu ◽  
Ruosi Yan ◽  
Zhihui Xia ◽  
Bao Shi ◽  
Sainan Wei ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Hybrid Composites ◽  
Orientation Angle ◽  
High Strength ◽  
Waterborne Polyurethane ◽  
Flexible Composites ◽  
Polyurethane Acrylate ◽  
Spun Yarn ◽  
Coating Method ◽  
Waterborne Polyurethane Acrylate

In this study, we fabricated para-aramid flexible angle-ply-laminated hybrid composites based on weft-knitted reinforcements. Here, four kinds of weft-knitted reinforcements with rib, interlock, punto di roma, and two-thread fleecy were prepared using para-aramid spun yarn. They were then compounded with silicone rubber and waterborne polyurethane–acrylate using the coating method. The layers were angle-plied to produce stab-resistant, weft-knitting-reinforced, flexible laminated hybrid composites. Tensile and tearing strengths of the para-aramid-knitted reinforcements were investigated. Relevant response analyses were chosen to evaluate the influence of three independent variables, including weft-knitted structures, matrix types, and ply orientations. The results showed that the mechanical properties of the composites were dependent on weft-knitted structures and matrix types. The fabric with high strength and the degree in approximate isotropy of stress in all composites was most suited for the reinforcement of the flexible stab-resistant composite. The optimum design with the best stab-resistant property was punto di roma/waterborne polyurethane–acrylate with a ply orientation angle of [0°/0°/0°/0°]. The interlaminar adhesion of flexible stab-resistant composite based on waterborne polyurethane–acrylate can be improved by increasing the surface roughness of fabric structure or modifying its surface.

Vibration Analysis of Single Walled Boron Nitride Nanotube Based Nanoresonators

2012 ◽  
Vol 3 (3) ◽  
Author(s):  
Mitesh B. Panchal ◽  
S. H. Upadhyay ◽  
S. P. Harsha
Keyword(s):  
Boron Nitride ◽  
Resonant Frequency ◽  
Continuum Mechanics ◽  
Boron Nitride Nanotubes ◽  
Response Analysis ◽  
Published Data ◽  
Boron Nitride Nanotube ◽  
Mass Sensor ◽  
Nanomechanical Resonators ◽  
Mass Sensitivity

In this paper, the vibration response analysis of single walled boron nitride nanotubes (SWBNNTs) treated as thin walled tube has been done using finite element method (FEM). The resonant frequencies of fixed-free SWBNNTs have been investigated. The analysis explores the resonant frequency variations as well as the resonant frequency shift of the SWBNNTs caused by the changes in size of BNNTs in terms of length as well as the attached masses. The performance of cantilevered SWBNNT mass sensor is also analyzed based on continuum mechanics approach and compared with the published data of single walled carbon nanotube (SWCNT) for fixed-free configuration as a mass sensor. As a systematic analysis approach, the simulation results based on FEM are compared with the continuum mechanics based analytical approach and are found to be in good agreement. It is also found that the BNNT cantilever biosensor has better response and sensitivity compared to the CNT as a counterpart. Also, the results indicate that the mass sensitivity of cantilevered boron nitride nanotube nanomechanical resonators can reach 10−23 g and the mass sensitivity increases when smaller size nanomechanical resonators are used in mass sensors.

Boron nitride nanotube-mediated stimulation modulates F/G-actin ratio and mechanical properties of human dermal fibroblasts

2014 ◽  
Vol 16 (2) ◽  
Author(s):  
Leonardo Ricotti ◽  
Ricardo Pires das Neves ◽  
Gianni Ciofani ◽  
Claudio Canale ◽  
Simone Nitti ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Boron Nitride ◽  
Dermal Fibroblasts ◽  
Human Dermal Fibroblasts ◽  
Boron Nitride Nanotube

Radial Mechanical Properties of Single-Walled Boron Nitride Nanotubes

Small ◽  
2011 ◽  
Vol 8 (1) ◽  
pp. 116-121 ◽  
Author(s):  
Meng Zheng ◽  
Xiaoming Chen ◽  
In-Tae Bae ◽  
Changhong Ke ◽  
Cheol Park ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Boron Nitride ◽  
Boron Nitride Nanotubes

scholarly journals Boron Nitride Nanotubes Enhance Mechanical Properties of Fibers from Nanotube/Polyvinyl Alcohol Dispersions

2021 ◽  
Author(s):  
Joe Farid Khoury ◽  
Jacob Christopher Vitale ◽  
Tanner Lane Larson ◽  
Geyou Ao
Keyword(s):  
Mechanical Properties ◽  
Boron Nitride ◽  
Polyvinyl Alcohol ◽  
Thermal Management ◽  
Boron Nitride Nanotubes ◽  
Protective Fabrics

Effectively translating the promising properties of boron nitride nanotubes (BNNTs) into macroscopic assemblies has vast potential for applications, such as thermal management materials and protective fabrics against hazardous environment. We...

Fabrication and mechanical properties of boron nitride nanotube reinforced silicon nitride ceramics

2018 ◽  
Vol 44 (6) ◽  
pp. 6456-6460 ◽  
Author(s):  
Tianfeng Li ◽  
Yongjun Chen ◽  
Wei Li ◽  
Jianbao Li ◽  
Lijie Luo ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Silicon Nitride ◽  
Boron Nitride ◽  
Boron Nitride Nanotube ◽  
Nitride Ceramics
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