3D printed sandwich materials filled with hydrogels for extremely low heat release rate

被引：22

作者：

Geoffroy, Laura ^{[1
]}

Davesne, Anne-lise ^{[1
]}

Bellayer, Severine ^{[1
]}

Blanchard, Florent ^{[2
]}

Richard, Elodie ^{[3
]}

Samyn, Fabienne ^{[1
]}

Jimenez, Maude ^{[1
]}

Bourbigot, Serge ^{[1
]}

机构：

[1] Univ Lille, CNRS, Cent Lille, INRAE,UMR 8207,UMET,Unite Mat & Transformat, F-59000 Lille, France

[2] Univ Lille, Univ Artois, CNRS, Cent Lille,UMR 8181,UCCS,Unite Catalyse & Chim So, F-59000 Lille, France

[3] Univ Lille, Inst Pasteur Lille, CNRS, CHU Lille,INSERM,US 41,UMS 2014,PLBS, F-59000 Lille, France

来源：

POLYMER DEGRADATION AND STABILITY | 2020年 / 179卷

基金：

欧洲研究理事会;

关键词：

Additive manufacturing; Design; Hydrogel; Sandwich multi-materials; Flame retardancy; FLAME INHIBITION; CLAY PLATELETS; FIRE; MECHANISM; GELS;

D O I：

10.1016/j.polymdegradstab.2020.109269

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Additive manufacturing is a powerful tool to design materials with original properties. An innovative design of poly (Ethylene Vinyl Acetate) (EVA) containing 30 wt.-% of Aluminum TriHydroxide (ATH) was reported in a previous paper and liquids (water or potassium carbonate aqueous solution) were incorporated in the 3D printed structure. These multi-materials showing interesting properties, but stability, control and processing of these liquid-containing systems were an issue due to porosity of the polymeric matrix. To overcome this issue, the use of hydrogels is considered in this study: being either solid or highly viscous, hydrogels can retain water in the design, despite the high porosity of the EVA/ATH matrix. In this paper, the liquid phase was substituted by flame retardant hydrogels (based on agar, alginate or poly (vinyl alcohol) - PVA), containing in particular vermiculite platelets and for the hydrogel based on alginate, K2CO3 as flame retardant fillers. Excellent behavior under a 50 kW/m(2) heat flux during a cone calorimeter test was obtained, with fast extinguishment of the flame and a low peak of Heat Release Rate (pHRR) and Total Heat Release (THR). The physical barrier formed by vermiculite platelets during the test, as well as the condensed phase mechanism of K2CO3 were found to be responsible for these excellent results, as found by confocal microscopy observations, electron probe micro analysis and X-Ray diffraction experiments. (C) 2020 Elsevier Ltd. All rights reserved.

引用

页数：18