A Novel Approach of Low Alkali Degumming of Ramie

Mishra, Leena; Das, Robin; Mustafa, Izhar; Basu, Gautam; Gogoi, Nabaneeta

doi:10.1080/15440478.2019.1658257

Cited by 12 publications

(2 citation statements)

References 14 publications

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“…However, traditional alkali degumming requires several additional chemicals (such as Na 2 SiO 3 ) along with NaOH as the degumming solvent for secondary alkali boiling, making the process more complicated. When ramie fibers were first treated with 2% sulfuric acid and then subjected to 6% NaOH treatment, the resulting RGC (7%) was lower than that of ammonia degumming mentioned in this study, and the experimental steps were more intricate . Moreover, the RGC of the ammonia degummed fiber was comparable to that of FeCl 3 –OS (approximately 3.88%), while the yield was slightly higher (76.3 vs 75.2%) .…”

Section: Resultscontrasting

confidence: 54%

“…When ramie fibers were first treated with 2% sulfuric acid and then subjected to 6% NaOH treatment, the resulting RGC (7%) was lower than that of ammonia degumming mentioned in this study, and the experimental steps were more intricate. 35 Moreover, the RGC of the ammonia degummed fiber was comparable to that of FeCl 3 −OS (approximately 3.88%), while the yield was slightly higher (76.3 vs 75.2%). 32 Additionally, an enzyme mixture could be used to degummed ramie fiber at a lower temperature (40 °C), which was environmentally friendly due to the absence of chemicals.…”

Section: Resultsmentioning

confidence: 79%

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Evaluation of Aqueous Ammonia Degumming of Ramie Fiber and Recyclability of Black Liquor

Lin,

Li,

Huang

et al. 2023

ACS Sustainable Chem. Eng.

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Section: Resultscontrasting

confidence: 54%

Section: Resultsmentioning

confidence: 79%

Evaluation of Aqueous Ammonia Degumming of Ramie Fiber and Recyclability of Black Liquor

Lin,

Li,

Huang

et al. 2023

ACS Sustainable Chem. Eng.

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Polyamide 6‐wheat straw composites: Degradation kinetics

2012

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Degradation kinetics of ground wheat straw (WS), polyamide 6, and a WS‐polyamide 6 composites obtained from extrusion were investigated. 15 wt% of ground WS was melt blended with other additives naming; lithium chloride salt (LiCl) and N‐butylbenzenesulfonamide plasticizer (N‐BBSA) as matrix treatments. The additives were added to reduce the melting point of polyamide 6 and ease of composite processing (reduction in processing temperature and time). Two commonly used non‐isothermal kinetic models were used to investigate the degradation kinetics of WS and the composite. Thermal gravimetric analysis was utilized to measure the thermal stability and degradation kinetics of different composite formulation. The activation energy of WS was identified by iso‐conversional Friedman kinetic method. Through this method, WS activation energy was found to be around 141.4 kJ/mol. Composite kinetic studies were based on the Coats and Redfern procedure. It was concluded that the composite activation energy was correlated to the residual weight percentage of the composite at the maximum thermal degradation temperature. The onset of degradation of WS was dictated by the thermal stability of its lignin content and was found to be around 188°C. WS, however, did not go through a major degradation up to 245°C at which drastic decomposition starts. This temperature range overlaps with processing temperature of Polyamide 6 and required matrix/WS treatments. Addition of salt and plasticizer individually or with each other at any level decreased the onset of degradation temperature. Addition of plasticizer at 4 wt% level, however, shifted the degradation peak to higher temperature representing a more thermally stable composite. POLYM. COMPOS., 2012. © 2012 Society of Plastics Engineers

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