Tunable Properties of Exfoliated Polyvinylalcohol Nanocomposites by In Situ Coprecipitation of Layered Double Hydroxides

5th Asia Conference on Mechanical and Materials Engineering

机械制造;材料科学

Liu, Jiajia^1 ; Yuen, Richard K.K.^2 ; Hu, Yuan^1

State Key Laboratory of Fire Science, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui

230026, China^1

Department of Architecture and Civil Engineering, City University of Hong Kong, Tat Chee Avenue Kowloon, Hong Kong, Hong Kong^2

关键词: Fire resistance properties;    Heat Release Rate (HRR);    Layered double hydroxides;    Poly (vinyl alcohol) (PVA);    Polymer aqueous solution;    Situ co-precipitation;    Transmission electron microscopy (TEM) characterizations;    Tunable properties;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/241/1/012001/pdf
DOI  :  10.1088/1757-899X/241/1/012001

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Poly(vinyl alcohol) (PVA) nanocomposites were prepared by a "one step" method based on the coprecipitation of layered double hydroxide (LDH) nanosheets in the polymer aqueous solution. The morphology, fire resistance properties, mechanical and optical properties of the PVA/LDH nanocomposites were studied. The LDH nanosheets were homogeneously dispersed in the PVA matrix as indicated by X-ray diffraction (XRD) pattern and transmission electron microscopy (TEM) characterization. Meanwhile, the peak of heat release rate (pHRR) and total heat release (THR) were decreased by 58% and 28%, respectively. Storage modulus at 30 °C was increased, and the transmittance of more than 90% at the visible region was obtained upon addition of 5 wt% LDH.