Synthesis of a novel polyphosphazene/triazine bi‐group flame retardant in situ doping nano zinc oxide and its application in poly (lactic acid) resin

2019 ◽  
Vol 30 (6) ◽  
pp. 1375-1385 ◽  
Author(s):  
Lifeng Xu ◽  
Xingde Wu ◽  
Linshan Li ◽  
Yajun Chen
Keyword(s):  
Zinc Oxide ◽  
Lactic Acid ◽  
Flame Retardant ◽  
Poly Lactic Acid ◽  
Acid Resin ◽  
Nano Zinc Oxide ◽  
Nano Zinc

scholarly journals Role of Hybrid Nano-Zinc Oxide and Cellulose Nanocrystals on the Mechanical, Thermal, and Flammability Properties of Poly (Lactic Acid) Polymer

2021 ◽  
Vol 5 (2) ◽  
pp. 43
Author(s):  
Dilpreet S. Bajwa ◽  
Jamileh Shojaeiarani ◽  
Joshua D. Liaw ◽  
Sreekala G. Bajwa
Keyword(s):  
Zinc Oxide ◽  
Lactic Acid ◽  
Zno Nanoparticles ◽  
Cellulose Nanocrystals ◽  
Thermal Characteristics ◽  
Extrusion Process ◽  
Shielding Effect ◽  
Poly Lactic Acid ◽  
Flame Resistance ◽  
Nano Zinc Oxide

Biopolymers with universal accessibility and inherent biodegradability can offer an appealing sustainable platform to supersede petroleum-based polymers. In this research, a hybrid system derived from cellulose nanocrystals (CNCs) and zinc oxide (ZnO) nanoparticles was added into poly (lactic acid) (PLA) to improve its mechanical, thermal, and flame resistance properties. The ZnO-overlaid CNCs were prepared via the solvent casting method and added to PLA through the melt-blending extrusion process. The composite properties were evaluated using SEM, a dynamic mechanical analyzer (DMA), FTIR TGA, and horizontal burning tests. The results demonstrated that the incorporation of 1.5% nano-CNC-overlaid ZnO nanoparticles into PLA enhanced the mechanical and thermal characteristics and the flame resistance of the PLA matrix. Oxidative combustion of CNC-ZnO promoted char formation and flame reduction. The shielding effect from the ZnO-CNC blend served as an insulator and resulted in noncontinuous burning, which increased the fire retardancy of nanocomposites. By contrast, the addition of ZnO into PLA accelerated the polymer degradation at higher temperature and shifted the maximum degradation to lower temperature in comparison with pure PLA. For PLA composites reinforced by ZnO, the storage modulus decreased with ZnO content possibly due to the scissoring effect of ZnO in the PLA matrix, which resulted in lower molecular weight.

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.

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.

Effect of Calcination on the Basic Strength of Surface Modified Nano-Zinc Oxide Characterised by FTIR and Back Titration Methods

2015 ◽  
Vol 1107 ◽  
pp. 326-332
Author(s):  
Abdul Rahim Yacob ◽  
Kamaluddeen Suleiman Kabo
Keyword(s):  
Zinc Oxide ◽  
Metal Oxides ◽  
Base Catalysis ◽  
Nano Zinc Oxide ◽  
Back Titration ◽  
And Performance ◽  
Nano Zinc ◽  
Surface Modified ◽  
Heterogeneous Base ◽  
Basic Strength

The use of metal oxides in heterogeneous base catalysis has gained a large interest due to their application in many chemical and industrial processes and is environmental friendly. Basic metal oxides are commonly used and their structures, morphology and performance can be modified by method of preparation and thermal activation. In this study, surface modified amphoteric zinc oxide was prepared via hydration-dehydration method and characterised by TGA and FTIR. The basic strength at various temperatures is characterised by FTIR and back titration analyses. The results shows that surface modified zinc oxide has the highest basic strength of 1.453mmolg-1at 400°C making it a relatively good and suitable compound for use in heterogeneous basic catalysis. This result is also supported by FTIR spectra which show possible relationship between the Lewis O2-and increasing basic strength.

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