Critical concentration for clogging of TEMPO-oxidized bamboo pulp suspensions in a high-pressure homogenizer

Author:

Hu Haowei1,Ji Hao2,Pu Jiali1,Zhang Qi2,Zhao Huifang1,Sha Lizheng1,Xu Yinchao1,Katsande Faith Ngaatendwe1,Zhang Xuejin3

Affiliation:

1. College of Environment and Resources, Zhejiang University of Science & Technology

2. Zhejiang Kaifeng Special Paper Co. Ltd.

3. College of Environment and Resources, Zhejiang University of Science & Technology; Zhejiang Kaifeng Special Paper Co. Ltd.

Abstract

Clogging is a critical problem that restricts the delamination of fibers in a high-pressure homogenizer (HPH). In this work, bleached bamboo pulp fibers were pretreated in TEMPO/NaBr/NaClO system prior to high-pressure homogenization to study the clogging condition in a high-pressure homogenizer. Effects of the additional amount of NaClO on the functional groups and morphologies of the bamboo pulp fiber were evaluated by conductometric titration, Fourier transform infrared spectroscopy (FTIR), fiber morphology analysis, and scanning electron microscopy (SEM). The fiber morphology analyzer revealed that the addition of NaClO facilitated to reduce the length of the fiber. The SEM images showed that TEMPO-mediated oxidation had a destructive effect on the fiber surface. The carboxylate contents of bamboo pulp fibers increased with the addition of NaClO, which were beneficial for increasing the critical concentrations of suspensions in the HPH. Nanocelluloses were successfully isolated from the TEMPO-oxidized bamboo pulp with different clogging critical concentrations, as were revealed by atomic force microscopy (AFM).

Publisher

BioResources

Subject

Waste Management and Disposal,Bioengineering,Environmental Engineering

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