Composition and structure of an antioxidant acetic acid lignin isolated from shoot shell of bamboo (Dendrocalamus Latiforus)

Lignin was extracted from Acanthopanax senticosus remainders after pharmaceutical production process, with acetic acid-water as extracting reagent. Four factors effects, namely reaction temperature from 160°C to 220°C, reaction time from 40 min to 100 min, acetic acid concentration from 50% to 80% and solid-liquid ratio from 1:40 to 1:5, were studied and optimized by a four-level orthogonal array design (OAD) on lignin antioxidant capacity. The results indicated the reaction temperature and reaction time were significant factors among these factors. At the same lignin solution concentration, the acetic acid lignin antioxidant capacity was better than that of Kraft lignin, but much lower than that of butylated hydroxyanisole (BHA).

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Preparation of activated carbon fibers with large specific surface area from softwood acetic acid lignin

Journal of Wood Science ◽

10.1007/bf00767899 ◽

2001 ◽

Vol 47 (6) ◽

pp. 465-469 ◽

Cited By ~ 47

Author(s):

Yasumitsu Uraki ◽

Akira Nakatani ◽

Satoshi Kubo ◽

Yoshihiro Sano

Keyword(s):

Acetic Acid ◽

Activated Carbon ◽

Specific Surface ◽

Surface Area ◽

Specific Surface Area ◽

Carbon Fibers ◽

Activated Carbon Fibers ◽

Large Specific Surface Area ◽

Acetic Acid Lignin ◽

Softwood Acetic Acid Lignin

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Activated Carbon Fibers from Acetic Acid Lignin

Holzforschung ◽

10.1515/hfsg.1997.51.2.188 ◽

1997 ◽

Vol 51 (2) ◽

pp. 188-192 ◽

Cited By ~ 31

Author(s):

Y. Uraki ◽

S. Kubo ◽

H. Kurakami ◽

Y. Sano

Keyword(s):

Acetic Acid ◽

Activated Carbon ◽

Carbon Fibers ◽

Activated Carbon Fibers ◽

Acetic Acid Lignin

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Preparation and characterization of acetic acid lignin-based epoxy blends

BioResources ◽

10.15376/biores.7.3.2860-2870 ◽

2012 ◽

Vol 7 (3) ◽

pp. 2860-2870

Author(s):

Pan Feng ◽

Fangeng Chen

Keyword(s):

Acetic Acid ◽

Sodium Hydroxide ◽

Aqueous Sodium Hydroxide ◽

Diglycidyl Ether ◽

Degradation Temperature ◽

Acetic Acid Lignin ◽

Epoxy Blends ◽

Thermal Degradation Temperature ◽

Adhesive Shear Strength

Lignin-based epoxy resin (LER) was prepared from phenolated lignin (PL) and epichlorohydrin (ECH) in the presence of sodium hydroxide. The eucalyptus acetic acid lignin (AAL) was first reacted with phenol in the presence of sulfuric acid to obtain PL. Then, PL was reacted with ECH in aqueous sodium hydroxide to obtain LER. LER was mixed with diglycidyl ether of bisphenol A (E-44) and then cured with triethylenetetramine (TETA). The initial thermal degradation temperature (Td) of the cured epoxy blends decreased with the increase in LER content. The residue ratio at 500 °C of the cured epoxy blends (R500), however, increased with the LER content. The maximum adhesive shear strength of the cured epoxy blends was obtained at 20 wt% of LER. The water absorption of epoxy blends increased with increasing the content of LER. SEM photos showed that increasing the content of LER increased inhomogeneity and porosity of epoxy blends.

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