In-situ experimental study on the hydrolysis and pyrolysis processes of polylactic acid

doi:10.1002/pen.26647

CORC > 深海科学与工程研究所 > 中国科学院深海科学与工程研究所 > 深海科学研究部 > 深海极端环境模拟研究实验室

	In-situ experimental study on the hydrolysis and pyrolysis processes of polylactic acid
	Zhao, Xia 3; Zheng, Zhi 1,2; Chen, Jiangzhi 2; Sun, Jianhui 2; Xiong, Mengjun 2; Hou, Xue 2; Mei, Shenghua 2
刊名	POLYMER ENGINEERING AND SCIENCE
	2024-02-01
页码	11
关键词	activation energy fused silica capillary reactor hydrolysis polylactic acid pyrolysis Raman spectrum
ISSN号	0032-3888
DOI	10.1002/pen.26647
英文摘要	In order to better understand the hydrolysis and pyrolysis process of polylactic acid (PLA), we carried out in-situ experiments by observing the decomposition process of PLA at high temperature (up to 285 degrees C) in both aqueous and anhydrous environments through fused silica capillary reactor (FSCR) combined with Raman spectroscopy analysis. By analyzing the strength change of characteristic peaks of PLA with increasing temperature, it was found that the initial melting temperature of PLA, in both the hydrolysis and pyrolysis processes, is around 170 degrees C. Based on infrared spectroscopy analysis, it was found that the products of PLA pyrolysis are CO2, CH3CHCO, and CH3CHO, indicating that the pyrolysis process of PLA results from a free radical reaction. By comparing the Raman peak area ratios at different peak positions at different temperatures, it was found that the hydrolysis process of PLA mainly involves breaking the COC and CCO bonds of PLA, producing lactic acid, ethanol, CO2, and H2O. The hydrolysis reaction rate of PLA increases with the increase of temperature and exhibits a slow-fast-slow S-shaped trend. The kinetic process of hydrolysis of PLA was well described using the Logistic model. The activation energy for the hydrolysis (Q) of PLA is 18.1 kcal center dot mol-1 in the temperature range of 250-285 degrees C. The results of this study provide important insights and crucial parameters for the production and application of PLA. The microscopic images of PLA over hydrolysis time at 270 degrees C, and its reaction rates and activation energy at temperatures from 250 to 285 degrees C. image
资助项目	the National Key R&D Program of China[2022CXYKFTK14] ; Open Project Program of Yazhou Bay Innovation Institute of Hainan Tropical Ocean University[2022YFC2805403] ; National Key R&D Program of China[RHDRC202311] ; Scientific Research Foundation of Hainan Tropical Ocean University
WOS关键词	FUSED-SILICA CAPILLARY ; HOT COMPRESSED WATER ; DEGRADATION ; DEPOLYMERIZATION ; PLA ; TEREPHTHALATE) ; CRYSTALLINITY ; POLYESTERS ; ETHANOL ; REACTOR
WOS研究方向	Engineering ; Polymer Science
语种	英语
出版者	WILEY
WOS记录号	WOS:001154924700001
资助机构	the National Key R&D Program of China ; Open Project Program of Yazhou Bay Innovation Institute of Hainan Tropical Ocean University ; National Key R&D Program of China ; Scientific Research Foundation of Hainan Tropical Ocean University
内容类型	期刊论文
源URL	[http://ir.idsse.ac.cn/handle/183446/10833]
专题	深海科学研究部_深海极端环境模拟研究实验室
通讯作者	Mei, Shenghua
作者单位	1.Hainan Trop Ocean Univ, Yazhou Bay Innovat Inst, Sanya, Peoples R China 2.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Peoples R China 3.Hainan Trop Ocean Univ, Sch Marine Sci & Technol, Sanya, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Xia,Zheng, Zhi,Chen, Jiangzhi,et al. In-situ experimental study on the hydrolysis and pyrolysis processes of polylactic acid[J]. POLYMER ENGINEERING AND SCIENCE,2024:11.
APA	Zhao, Xia.,Zheng, Zhi.,Chen, Jiangzhi.,Sun, Jianhui.,Xiong, Mengjun.,...&Mei, Shenghua.(2024).In-situ experimental study on the hydrolysis and pyrolysis processes of polylactic acid.POLYMER ENGINEERING AND SCIENCE,11.
MLA	Zhao, Xia,et al."In-situ experimental study on the hydrolysis and pyrolysis processes of polylactic acid".POLYMER ENGINEERING AND SCIENCE (2024):11.