|
|
|
|
| LEADER |
01000caa a22002652c 4500 |
| 001 |
NLM333513177 |
| 003 |
DE-627 |
| 005 |
20250302171652.0 |
| 007 |
cr uuu---uuuuu |
| 008 |
231225s2022 xx |||||o 00| ||eng c |
| 024 |
7 |
|
|a 10.1016/j.wasman.2021.11.006
|2 doi
|
| 028 |
5 |
2 |
|a pubmed25n1111.xml
|
| 035 |
|
|
|a (DE-627)NLM333513177
|
| 035 |
|
|
|a (NLM)34814073
|
| 035 |
|
|
|a (PII)S0956-053X(21)00586-9
|
| 040 |
|
|
|a DE-627
|b ger
|c DE-627
|e rakwb
|
| 041 |
|
|
|a eng
|
| 100 |
1 |
|
|a Tian, Zishang
|e verfasserin
|4 aut
|
| 245 |
1 |
0 |
|a Chemical recycling of waste poly-p-phenylene terephthamide via selective cleavage of amide bonds catalyzed by strong Brönsted base in alcohols
|
| 264 |
|
1 |
|c 2022
|
| 336 |
|
|
|a Text
|b txt
|2 rdacontent
|
| 337 |
|
|
|a ƒaComputermedien
|b c
|2 rdamedia
|
| 338 |
|
|
|a ƒa Online-Ressource
|b cr
|2 rdacarrier
|
| 500 |
|
|
|a Date Completed 07.12.2021
|
| 500 |
|
|
|a Date Revised 14.12.2021
|
| 500 |
|
|
|a published: Print-Electronic
|
| 500 |
|
|
|a Citation Status MEDLINE
|
| 520 |
|
|
|a Copyright © 2021 Elsevier Ltd. All rights reserved.
|
| 520 |
|
|
|a Poly-p-phenylene terephthamide (PPTA) is widely applied in bulletproof products and composite materials because of its high strength, high modulus, high temperature resistance and creep resistance. The PPTA molecule with highly symmetrical and regular structure is linear structure formed by the alternating connection of benzene ring and amide bond, and the amide bonds between the molecular chains form strong hydrogen bonds. Therefore, the dissolution and depolymerization of PPTA is very challenging. In this work, an efficient catalytic system was developed for the controllable degradation of waste PPTA, and the high-value added monomers terephthalic acid (TPA) and p-phenylenediamine (PPD) were recovered. The results show that the amide bonds of PPTA can be selectively cleaved by the strong Brönsted base catalysts in alcohols, especially in the NaOH/n-butanol system. Under the optimal degradation conditions (5 wt% NaOH in n-butanol, 180 °C, 6 h), the percentage degradation of PPTA is 100%, and the yields of TPA and PPD are 92.0% and 91.5%, respectively. In addition, it is found that the wettability of n-alcohols on PPTA monofilament and the addition of a small amount of water have important influences on the degradation of PPTA. The work elucidates the degradation mechanism of PPTA, and reveals the important factors affecting the depolymerization of PPTA
|
| 650 |
|
4 |
|a Journal Article
|
| 650 |
|
4 |
|a Amide bond fracture
|
| 650 |
|
4 |
|a Aramid fibers
|
| 650 |
|
4 |
|a Aromatic polyamide
|
| 650 |
|
4 |
|a Brönsted-base catalysis
|
| 650 |
|
4 |
|a Depolymerization
|
| 650 |
|
4 |
|a Hydrolysis
|
| 650 |
|
7 |
|a Alcohols
|2 NLM
|
| 650 |
|
7 |
|a Amides
|2 NLM
|
| 650 |
|
7 |
|a Cycloparaffins
|2 NLM
|
| 650 |
|
7 |
|a poly-para-phenylene
|2 NLM
|
| 700 |
1 |
|
|a Shao, Xiaojie
|e verfasserin
|4 aut
|
| 700 |
1 |
|
|a Zhang, Jiaojiao
|e verfasserin
|4 aut
|
| 700 |
1 |
|
|a Su, Lijuan
|e verfasserin
|4 aut
|
| 700 |
1 |
|
|a Wang, Yingxiong
|e verfasserin
|4 aut
|
| 700 |
1 |
|
|a Deng, Tiansheng
|e verfasserin
|4 aut
|
| 700 |
1 |
|
|a Wang, Yuqi
|e verfasserin
|4 aut
|
| 700 |
1 |
|
|a Hou, Xianglin
|e verfasserin
|4 aut
|
| 773 |
0 |
8 |
|i Enthalten in
|t Waste management (New York, N.Y.)
|d 1999
|g 137(2022) vom: 01. Jan., Seite 275-282
|w (DE-627)NLM098197061
|x 1879-2456
|7 nnas
|
| 773 |
1 |
8 |
|g volume:137
|g year:2022
|g day:01
|g month:01
|g pages:275-282
|
| 856 |
4 |
0 |
|u http://dx.doi.org/10.1016/j.wasman.2021.11.006
|3 Volltext
|
| 912 |
|
|
|a GBV_USEFLAG_A
|
| 912 |
|
|
|a SYSFLAG_A
|
| 912 |
|
|
|a GBV_NLM
|
| 912 |
|
|
|a GBV_ILN_350
|
| 951 |
|
|
|a AR
|
| 952 |
|
|
|d 137
|j 2022
|b 01
|c 01
|h 275-282
|