A Novel Thermally Conductive Phase Change Material of Polythiophene-Coated Core–Shell Polyethylene Glycol/Nano Zinc Oxide by In Situ Polymerization

2020 ◽  
Vol 124 (46) ◽  
pp. 25202-25210
Author(s):  
Qiang Zhang ◽  
Zengsheng Weng ◽  
Kun Wu ◽  
Weilong Chen ◽  
Mangeng Lu
Keyword(s):  
Zinc Oxide ◽  
Polyethylene Glycol ◽  
Phase Change ◽  
In Situ Polymerization ◽  
Core Shell ◽  
Nano Zinc Oxide ◽  
Thermally Conductive ◽  
Nano Zinc ◽  
Change Material

Crystallization Behaviour of Nano-ZnO/PET and Nano-ZnO/Polyethylene Glycol (PEG)/PET Composites by In Situ Polymerization

2007 ◽  
Vol 334-335 ◽  
pp. 853-856 ◽  
Author(s):  
Jie Tao ◽  
Xiang Dong ◽  
Tao Wang ◽  
Yi Hua Cui
Keyword(s):  
Polyethylene Glycol ◽  
In Situ Polymerization ◽  
Crystallization Rate ◽  
Nano Particles ◽  
Nano Zno ◽  
Nano Zinc Oxide ◽  
Uniform Dispersion ◽  
Nano Zinc ◽  
Polymerization Method

In order to improve the crystallization properties of the polyethylene terephthalate (PET), nano-zinc oxide (nano-ZnO)/PET and nano-ZnO/polyethylene glycol (PEG)/PET composites were successfully synthesized by in-situ polymerization method in this work. The experimental results indicated that nano particles can accelerate the crystallization of the PET which was demonstrated by increase in the intensities of the XRD peaks. PEG and PET form copolymer in composites, leading to the improvement of the flexibility of the molecule chain. Meanwhile, PEG was able to encapsulate the nano particles to make them have both good compatibility to matrix and uniform dispersion in the composites. Therefore, the crystallization rate and crystallization capability of nano-ZnO/PEG/PET composites were reasonably raised.

scholarly journals Thermal Properties of Surface-Modified and Cross-Linked Boron Nitride/Polyethylene Glycol Composite as Phase Change Material

Polymers ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 456
Author(s):  
Jaehyun Wie ◽  
Jooheon Kim
Keyword(s):  
Thermal Conductivity ◽  
Polyethylene Glycol ◽  
Boron Nitride ◽  
Phase Change ◽  
Phase Change Material ◽  
Interfacial Adhesion ◽  
Hydroxyl Groups ◽  
Thermally Conductive ◽  
Surface Modified ◽  
Change Material

A thermally conductive phase change material (PCM) was fabricated using polyethylene glycol (PEG) and boron nitride (BN). However, the interfacial adhesion between the BN and the PEG was poor, hindering efficient heat conduction. Grafting polyvinyl alcohol (PVA) onto the surface of BN and cross-linking due to hydrogen bonding between the hydroxyl groups in PVA and oxygen atoms in PEG improved the wettability of fillers. By employing this strategy, we achieved a thermal conductivity value of 0.89 W/mK, a 286% improvement compared to the thermal conductivity of the pristine PEG (0.23 W/mK). Although the latent heat of composites decreased due to the mobility of the polymer chain, the value was still reasonable for PCM applications.

Effect of In Situ Surface Modificated Nano-Zinc Oxide on the Curing Structure and Property of Natural Rubber Conventional Vulcanization

2011 ◽  
Vol 236-238 ◽  
pp. 1757-1760
Author(s):  
Yue Hui Chen ◽  
Li Deng ◽  
Zhong Biao Man ◽  
Miao Yang
Keyword(s):  
Zinc Oxide ◽  
Sol Gel ◽  
Accelerated Aging ◽  
Structure And Property ◽  
Hot Air ◽  
Nano Zinc Oxide ◽  
Transmission Electron ◽  
Aging Property ◽  
Nano Zinc

In-situ surface modificated nano-zinc oxide was prepared in sol-gel method and the microscopic structure of the zinc oxide particles was analyzed by transmission electron microscopy (TEM). The influence of the nano-zinc oxide on the physical properties of NR vulcanizates was investigated, and the vulcanizates heat-resistant oxygen aging property was studied by the hot air accelerated aging method. Therefore, not only can the strength and elongation properties of vulcanizates greatly be improved, but aslo the heat oxygen aging property of vulcanizate rubber was extremely promoted.

scholarly journals New Approach of Phase Change Material Encapsulation through in situ Polymerization to Improve Thermo-Regulating Property of Cellulose

2016 ◽  
Vol 28 (6) ◽  
pp. 1191-1196 ◽  
Author(s):  
Asfandyar Khan ◽  
Md. Nahid Pervez ◽  
Imran Ahmad Khan ◽  
Shabeer Ahmad ◽  
Rashid Masood ◽  
...  
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
In Situ Polymerization ◽  
New Approach ◽  
Change Material

EFFECT OF IN SITU SURFACE-MODIFIED NANO–ZINC OXIDE ON THE STRUCTURE AND PROPERTIES OF CONVENTIONAL VULCANIZATION IN NATURAL RUBBER

2014 ◽  
Vol 87 (1) ◽  
pp. 21-30 ◽  
Author(s):  
Zhongbiao Man ◽  
Li Deng ◽  
Miao Yang ◽  
Yuehui Chen ◽  
Zhengjie Jin
Keyword(s):  
Electron Microscopy ◽  
Tensile Strength ◽  
Zinc Oxide ◽  
Natural Rubber ◽  
Nano Zno ◽  
X Ray ◽  
Nano Zinc Oxide ◽  
Nano Zinc ◽  
Surface Modified

ABSTRACT In situ surface-modified nano–zinc oxide (ZnO) had been prepared by the sol-gel method. The microscopic structure of the ZnO particles was characterized by X-ray diffraction and transmission electron microscopy. Scanning electron microscopy with energy-dispersed X-ray spectroscopy was used to observe the dispersal of ZnO in conventional vulcanization of natural rubber (NR). Properties such as cure and tensile characteristics as well as heat-resistance oxygen aging properties were researched and compared. The vulcanized structure of vulcanizate was studied by the balance-swelling method and chemical-detecting process. Results demonstrated that the dispersal of in situ surface-modified nano-ZnO in NR vulcanizate was better than that of ordinary ZnO. Compared with the addition of 5 phr of ordinary ZnO in NR, the tensile strength and elongation of NR vulcanizate filled with 2 phr of in situ surface-modified nano-ZnO increased by 0.55% and 10.34%, respectively. Meanwhile, the retention of tensile strength and elongation of vulcanizate increased by 35.85% and 19.36%, respectively.

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