五种海南常见速生材种制化学机械浆性能评估

doi:10.3969/j.issn.0253-2417.2020.02.008

Abstract

Abstract:

Five species of fast-growing pulpwood (Eucalyptus urophylla×E. grandis, Eucalyptus urophylla, Eucalyptus urophylla×E. tereticornis, Acacia mangium, Acacia crassicarpa) in Hainan Province were collected and converted into pulping. Then, their pulping performance were evaluated by using P-RC APMP as the process. The experimental results showed that the pulp yield of E. urophlla×E. tereticornis was the highest, reaching 91.2%, whereas the yield of A. crassicarpa pulp was the lowest, reaching 84.2% under the same pulping process conditions. When the pulp was milled to the same Canadian Standard Freeness of 300 mL, the electricity consumption of A. mangium pulp was the lowest, 1 209 kW·h/t, while that of the E. urophylla×E. grandis was the highest, 1 361 kW·h/t. The E. urophylla×E. grandis pulp had the highest bulk of 2.84 cm³/g. The bulk of A. mangium pulp and E. urophlla×E. tereticornis pulp were lower at 2.45 and 2.51 cm³/g, respectively. The strength performance of A. mangium pulp was the best, and its tensile strength, burst strength and tear strength were 28.42 N·m/g, 1.54 kPa·m²/g, and 2.7 mN·m²/g, respectively. The strength properties of the E. urophylla×E. grandis pulp was the worst. The whiteness of E. urophlla×E. tereticornis pulp and E. urophylla pulp were the highest (about 83% (ISO)), and the whiteness of A. mangium pulp was the lowest (about 78% (ISO)).

Key words: fast-growing pulpwood, chemi-mechanical pulp, chemical composition, fiber morphology, pulping performance

CLC Number:

Hua ZHU,Ting WU,Guigan FANG,Long LIANG,Beiping ZHU,Guanghui SHE. Performance Evaluation of Chemi-mechanical Pulping Obtained from Five Kinds of Common Fast-growing Pulpwood in Hainan Province[J]. Chemistry and Industry of Forest Products, 2020, 40(2): 63-68.

Figures/Tables 6

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References 18

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阶段¹⁾stage	加入量dosage/%					质量分数/% mass fraction	温度/℃ temperature	时间/min time
阶段¹⁾stage	H₂O₂	NaOH	Na₂SiO₃	MgSO₄	DTPA	质量分数/% mass fraction	温度/℃ temperature	时间/min time
一段first stage		1.0			0.3	30	75	30
二段second stage	5.0	3.5	2.0	0.1	0.2	25	50	10

树种 species	综纤维素 holocellulose	Klason木质素 Klason lignin	聚戊糖 pentosan	抽出物extractives			灰分 ash
树种 species	综纤维素 holocellulose	Klason木质素 Klason lignin	聚戊糖 pentosan	热水 hot water	苯醇 benzene-alcohol	1% NaOH	灰分 ash
尾巨桉E. urophylla×E. grandis	80.79	22.24	21.71	3.91	2.61	19.24	0.36
尾叶桉E. urophylla	78.55	22.74	23.20	4.54	2.53	16.01	0.61
尾细桉E. urophlla×E. tereticornis	80.17	23.06	25.48	4.55	1.72	15.44	0.58
马占相思A. mangium	76.09	25.51	23.48	2.53	2.49	15.71	0.62
厚荚相思A. crassicarpa	74.19	26.64	25.58	2.18	1.91	14.52	0.55

树种 species	平均长度/μm mean fiber length	平均宽度/μm mean fiber width	细胞腔直径/μm lumen diameter	双壁厚/μm double wall thickness	壁腔比值 wall to lumen ratio	基本密度/(kg·m^-3) basic density	白度/%(ISO) brightness
尾巨桉E. urophylla×E. grandis	785	15.21	9.39	6.09	0.65	490	24.66
尾叶桉E. urophylla	769	16.73	9.61	6.19	0.64	453	27.13
尾细桉E. urophlla×E. tereticornis	772	16.03	10.69	5.77	0.54	448	24.91
马占相思A. mangium	804	20.06	10.72	5.43	0.51	450	30.50
厚荚相思A. crassicarpa	753	21.21	9.68	5.62	0.58	481	25.43

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Performance Evaluation of Chemi-mechanical Pulping Obtained from Five Kinds of Common Fast-growing Pulpwood in Hainan Province

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