The reactivity of lignin carbohydrate complex (LCC) during manufacture of dissolving sulfite pulp from softwood

被引:27
作者
Deshpande, Raghu [1 ,3 ]
Giummarella, Nicola [2 ]
Henriksson, Gunnar [1 ,2 ]
Germgard, Ulf [1 ]
Sundvall, Lars [3 ]
Grundberg, Hans [4 ]
Lawoko, Martin [2 ]
机构
[1] Karlstad Univ, SE-65188 Karlstad, Sweden
[2] KTH, Royal Inst Technol, Sch Chem Sci & Engn, Wallenberg Wood Sci Ctr, S-10044 Stockholm, Sweden
[3] MoRe Res, SE-89122 Ornskoldsvik, Sweden
[4] Domsjo Fabriker, SE-89186 Ornskoldsvik, Sweden
关键词
Lignin carbohydrate complexes; Sulfite pulping; Pine heartwood; Universal fractionation method; Size exclusion chromatography; KRAFT PULPS; DISSOLUTION; CELLULOSE; SPRUCE; BONDS; NMR;
D O I
10.1016/j.indcrop.2018.02.038
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
The presence of covalent bonds between lignin and polysaccharides was investigated in dissolving pulps made with one-stage and two-stage acidic sulfite pulping for 100% pine heartwood raw material. The covalent bonds between lignin and pulp polysaccharides occurred mainly to xylan and glucomannan and were of the phenyl glycosides and gamma-esters types. The alpha-ethers that are common in wood were missing in the studied pulp samples. Based on these findings and known lignin reactions during sulfite pulping, a mechanism explaining the absence of the alpha-ethers is discussed. It is suggested that the lignin carbohydrate bonds may play a vital role in lignin recalcitrance.
引用
收藏
页码:315 / 322
页数:8
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