Highly flame retardancy, barrier, mechanical and persistent antibacterial polylactic acid film with high-parallel interconnected thousand layered cake architecture

被引：4

作者：

Tang, Dongfang ^{[1
]}

Qin, Zuodong ^{[1
]}

Luo, Xiaofang ^{[1
]}

Yang, Hua ^{[1
]}

Liao, Yunhui ^{[1
]}

Liu, Kuo ^{[1
]}

Ding, Hongru ^{[1
]}

Tang, Wufei ^{[1
,2
]}

机构：

[1] Hunan Univ Sci & Engn, Coll Chem & Bioengn, Hunan Engn Technol Res Ctr Comprehens Dev & Utiliz, Yongzhou 425199, Peoples R China

[2] Chinese Acad Sci, Guangzhou Inst Geochem, CAS Key Lab Mineral & Metallogeny, Guangdong Prov Key Lab Mineral Phys & Mat, Guangzhou 510640, Peoples R China

来源：

INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES | 2024年 / 273卷

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Flame retardancy; Bio-based materials; Polylactic acid film;

D O I：

10.1016/j.ijbiomac.2024.132777

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

In this work, a bio-based material (CGP) is obtained by combing chitosan, gelatin and polyvinyl alcohol through a simple solution mixing to simultaneously address polylactic acid film (PLA)' flammability and poor barrier, toughness and antibacterial properties by soaking. The results of open fire testing show that modified PLA films can effectively prolong the combustion time, improve the thermal stability and reduce the release of heat in the cone calorimeter test. For the PLA sample after soaking for 5 times (PLA-5) in particular, it can reduce the peak heat release rate (pHRR) and total heat release (THR) values to 85.8 kW/m2 and 1.3 MJ/m2 from the values of 129.5 kW/m2 and 1.8 MJ/m2 for PLA, respectively. Structural analysis suggests that CGP primarily operates in the condensed phase by forming physical barriers. Meanwhile, the modified PLA films can exhibit superior barrier effects, which indicate the oxygen transmission rate value of PLA-5 decreases to 0.9 cm3/(m2 & sdot;day) from the 392.5 cm3/(m2 & sdot;day) of raw PLA film. Moreover, the PLA-5 also have excellent toughness (the value increased to 200.5 % from 31.0 %) and persistent antibacterial effects (it still has 100 % sterilization after 500 days).

引用

页数：13