Influence of Soda Pulping Variables on Properties of Pineapple (Ananas comosus Merr.) Leaf Pulp and Paper Studied by Face-Centered Composite Experimental Design

Table 2

Solubility limit and chemical compositions of pineapple leaves (expressed as percent on a dry weight basis).

Solubility and component	Result (%)
	This work	[11]	[8]
Solubility
(i) Alcohol-benzene solubility	10.8	10.5	—
(ii) Hot water solubility	18.8	25.2	32.5
(iii) 1% NaOH solubility	64.3	65.9	39.7
Component
(i) Ash	7.1	8.6	4.5
(ii) Lignin	15.0	12.9	4.2
(iii) Holocellulose	46.5	46.9	85.7
(iv) Pentosan	26.4	22.3	—

Note: [11] = Treesuwan (2005) and [8] = Daud et al. (2014).