In situ preparation of intrinsic flame retardant urea formaldehyde/aramid fiber composite foam: Structure, property and reinforcing mechanism

2018 ◽  
Vol 115 ◽  
pp. 274-282 ◽  
Author(s):  
Yalong Liu ◽  
Lin Ye ◽  
Ying Shu ◽  
Xiaowen Zhao
2011 ◽  
Vol 393-395 ◽  
pp. 1012-1017 ◽  
Author(s):  
Yu Feng Ma ◽  
Wei Zhang ◽  
Ling Li ◽  
Ming Ming Zhang ◽  
Zeng Hui Cheng ◽  
...  

New composite foams were prepared by co-foaming of Melamine-Urea-Formaldehyde (MUF) resin and wood fiber in the closed mould at 70°C. The effects of amount of wood fiber on mechanical properties, brittleness, flame-retardant, insulation and microscopic structures of wood fiber-MUF foam were investigated. Results indicated that the flame-retardant properties increased, and the brittleness and mechanical properties decreased with the increase of the amount of wood fiber in composite foams. The addition of wood fiber resulted in more uniform cell size distribution and irregular cell shape, but had little effect on insulation properties.


2017 ◽  
Vol 12 (3) ◽  
pp. 155892501701200 ◽  
Author(s):  
Yongjian Xu ◽  
Chunmei Jiang ◽  
Chao Duan ◽  
Weipeng Zhang

Calcium carbonate/cellulose fiber composites combining natural polymers and inorganic particles are promising materials for preparing fluff pulp. In this study, calcium carbonate (CaCO3) particles were in-situ precipitated on cellulose fiber surfaces to decrease the level of hydrogen bonding. The results showed that nano CaCO3 particles precipitated and dispersed well on the fiber surface. The fluff pulp made from cellulose/CaCO3 modified fibers exhibited high effectiveness in the dry defibration process and good adsorption capacity due to the weak hydrogen bonding. The burst index of the handsheets decreased 31% (based on the ash content of 1.48 wt. %) without compromising the adsorption capacity of the fluff pulp.


2019 ◽  
Vol 21 (6) ◽  
pp. 1484-1497 ◽  
Author(s):  
Sheng Wang ◽  
Songqi Ma ◽  
Qiong Li ◽  
Xiwei Xu ◽  
Binbo Wang ◽  
...  

A high-performance epoxy vitrimer was facilely prepared from a renewable lignin derivative vanillin, and its carbon-fiber composites were nondestructively recycled.


2018 ◽  
Vol 40 (S1) ◽  
pp. E811-E820 ◽  
Author(s):  
Buyong Wu ◽  
Yalong Liu ◽  
Ying Shu ◽  
Lin Ye ◽  
Xiaowen Zhao

2011 ◽  
Vol 250-253 ◽  
pp. 951-955 ◽  
Author(s):  
Shou Hai Li ◽  
Xiao Wei Zhuang ◽  
Yu Feng Ma ◽  
Chun Peng Wang ◽  
Fu Xiang Chu

New composite foams were prepared by using Melamine-Urea-Formaldehyde (MUF) resin and wood pulp fiber as raw materials with co-foaming method at 70°C in the opening mould. The study of the composites foam microstructure showed good adhesion between MUF matrix foam and wood pulp fiber. The flame-retardant, mechanical, anti-brittleness and insulation properties of composite foam were excellent. The results indicated that composites had superior properties enough to replace the conventional foam materials.


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