研究目的
To investigate the degradation of lignin in luffa using guaiacol as a model compound and to extract a new cellulose material from natural luffa via plasma pretreatment for producing regenerated cellulose films.
研究成果
Plasma pretreatment is an environmentally friendly and efficient method for extracting cellulose from luffa, enabling the production of regenerated cellulose films with good mechanical properties and wettability. The study demonstrates the feasibility of using luffa as a source for cellulose films, with ongoing research needed for further improvements.
研究不足
The energy consumption of plasma treatment is higher than traditional methods, and complete removal of lignin was not achieved, indicating potential for optimization in efficiency and thoroughness of degumming.
1：Experimental Design and Method Selection:
The study used glow discharge plasma in water for pretreatment to extract cellulose from luffa, followed by dissolution in anhydrous phosphoric/polyphosphoric acid (aPPAC) solvent to prepare films. Methods included UV spectrophotometry, SEM, XRD, FTIR, mechanical testing, and contact angle measurements.
2：Sample Selection and Data Sources:
Dried luffa was purchased from Luohe Commodity Co., Ltd. Guaiacol was used as a model compound for lignin degradation studies.
3：List of Experimental Equipment and Materials:
Equipment included CTP1200 plasma treatment equipment, UV-8000 spectrophotometer, HPL-85 polarized optical microscope, JEOL JSM-6460LV SEM, D/max-3B XRD, Spectrum One-B FTIR, TH-8102S material testing machine, and K100 contact angle meter. Materials included luffa, phosphoric acid, polyphosphoric acid, crystal violet, n-butanol, and guaiacol.
4：Experimental Procedures and Operational Workflow:
Plasma treatment of luffa powder and guaiacol solutions under specific conditions (e.g., 100W power, 20 min time), preparation of aPPAC solvent, dissolution observation with microscope, film preparation by casting and coagulation in ice water, and characterization using various techniques.
5：Data Analysis Methods:
UV absorbance measurements for radical evidence and degradation rates, SEM for morphology, XRD for crystalline structure, FTIR for chemical properties, mechanical testing for strength and elongation, and contact angle for wettability.
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UV Spectrophotometer
UV-8000
Shimadzu Corporation
Used to measure absorbance of solutions for evidence of radicals and degradation studies.
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SEM
JSM-6460LV
JEOL
Used to observe surface morphology of luffa and films.
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XRD
D/max-3B
Rigaku Co., Ltd.
Used to examine crystalline structure of samples.
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FTIR
Spectrum One-B
Perkin Elmer Co., Ltd.
Used to test chemical properties via infrared spectroscopy.
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Plasma Treatment Equipment
CTP1200
Coronalab
Used for plasma pretreatment of luffa and guaiacol solutions to produce reactive species for degumming.
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Polarized Optical Microscope
HPL-85
Shanghai Quantong Optical Co., Ltd.
Used to observe the dissolution process of luffa cellulose in aPPAC solvent.
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Material Testing Machine
TH-8102S
Suzhou Tuobo Machinery Equipment Co., Ltd.
Used to measure mechanical properties of films.
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Contact Angle Meter
K100
Kruss Co., Ltd.
Used to test hydrophilicity of films.
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