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| Effect of Polyether-modified Silicone on the Performance of Defoamers for Pulping Black Liquor |
| Received:December 31, 2025 Revised:April 06, 2026 |
| DOI：10.11980/j.issn.0254-508X.2026.06.019 |
| Key Words:polyether-modified silicone viscosity hydrophilicity defoamer |
| Author Name | Affiliation | Postcode | | WANG Kuijiang* | Zhejiang Transfar Whyyon Chemical Co., Ltd., Hangzhou, Zhejiang Province, 311200 | 311200 | | LUO Xiaolin | Zhejiang Transfar Whyyon Chemical Co., Ltd., Hangzhou, Zhejiang Province, 311200 | 311200 | | SONG Lin | Zhejiang Transfar Whyyon Chemical Co., Ltd., Hangzhou, Zhejiang Province, 311200 | 311200 | | YANG Lei | Zhejiang Transfar Whyyon Chemical Co., Ltd., Hangzhou, Zhejiang Province, 311200 | 311200 | | JIANG Dong | Zhejiang Transfar Whyyon Chemical Co., Ltd., Hangzhou, Zhejiang Province, 311200 | 311200 | | ZHA Wangmin | Zhejiang Transfar Whyyon Chemical Co., Ltd., Hangzhou, Zhejiang Province, 311200 | 311200 | | XU Cuiying | Zhejiang Transfar Whyyon Chemical Co., Ltd., Hangzhou, Zhejiang Province, 311200 | 311200 | | CHEN Wenjie | Zhejiang Transfar Whyyon Chemical Co., Ltd., Hangzhou, Zhejiang Province, 311200 | 311200 |
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| Abstract:In this study, by varying two critical parameters of polyether-modified silicone (PEMS) —viscosity and the structural characteristics of its polyether segment, the impacts on the emulsification behavior and functional properties of the resulting defoamer emulsions were analysed. The viscosity of PEMS was determined by multiple factors, including the structural features of hydrosilicone oil, hydrosilicone oil hydrogen content, catalyst dosage, viscosity of vinyl silicone oil, and the molecular weight of the polyether segment. And the structure of the polyether segment within PEMS was primarily governed by the mass ratio of ethylene oxide (EO)/propylene oxide (PO). The results showed that when the hydrogen content of the end/side hydrogen-containing silicone oil was 0.10%, the catalyst dosage was 10 mg/kg, the viscosity of the vinyl silicone oil was 2 500 mPa·s, and the molecular weight of the allyl polyether (EO/PO mass ratio was 3∶7) was 650 g/mol, the viscosity of PMES was 42 000 mPa·s.The defoamer emulsion prepared from PMES emulsified silicone paste was in the best state, with the good water dispersion performance, the excellent defoaming performance, and no silicon precipitation in black puping liquor in pulping black liquor. |
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