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| Removal Rule of Iron Ions by Acid Treatment during the Preparation of Insulating Bamboo Pulp |
| Received:March 01, 2022 |
| DOI：10.11980/j.issn.0254-508X.2022.06.005 |
| Key Words:insulating bamboo pulp acid treatment iron ion |
| Fund Project:国家科技基础资源调查专项（2019FY100900）。 |
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| Abstract:The effects of sulfuric acid and citric acid treatment on the removal of iron ions during the preparation of bamboo pulp were discussed. The rules of iron ion removal were revealed and the corresponding predicting model was established. The properties of high-purity insulating bamboo pulp were also discussed. The results showed that the removal process of iron ions could be roughly divided into three stages： rapid removal， sufficient removal and residual removal. The optimum treatment conditions were obtained that the dosage of acid was 1% at the processing temperature of 70°C with the processing time of 60 mins. Compared with the sulfuric acid treatment， the pulp fibers obtained by citric acid treatment were less damaged， and the degree of polymerization had no obvious change with a better mechanical strength. The bamboo pulp treated with sulfuric acid or citric acid could both meet the quality requirements of high-purity insulating pulp. |
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