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| Study on Preparation and Application Properties of Polypropylene Carbonate Emulsions |
| Received:November 25, 2024 |
| DOI：10.11980/j.issn.0254-508X.2025.05.015 |
| Key Words:polypropylene carbonate emulsion emulsifier emulsification process |
| Fund Project:中国轻工集团有限公司科技创新基金项目（ZQ2022YY04）。 |
| Author Name | Affiliation | Postcode | | LI Hongcai* | China National Pulp and Paper Research Institute Co., Ltd., Beijing, 100102
National Engineering Lab for Pulp and Paper, Beijing, 100102 | 100102 | | DONG Fengxia | China National Pulp and Paper Research Institute Co., Ltd., Beijing, 100102 | 100102 | | WANG Bisong | China National Pulp and Paper Research Institute Co., Ltd., Beijing, 100102
National Engineering Lab for Pulp and Paper, Beijing, 100102 | 100102 | | LIU Jingang | China National Pulp and Paper Research Institute Co., Ltd., Beijing, 100102
National Engineering Lab for Pulp and Paper, Beijing, 100102 | 100102 |
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| Abstract:Emulsification of poly(propylene carbonate) （PPC） resin was investigated using different emulsifiers， with emulsification efficiency and particle size of emulsion serving as evaluation indices for process optimization. The results showed that the optimal emulsifier combination consisted of cetyltrimethylammonium bromide （CTAB） and Tween 80 at an absolute dry mass ratio of 3∶1. The optimized emulsification parameters were determined as follows： emulsifier dosage of 15%， internal-to-external phase volume ratio of 3∶4， oil phase comprising dichloromethane solution containing 25% PPC resin， saponification temperature maintained at 30 ℃， shear rate exceeding 10，000 r/min， shear duration of 4~6 min， with additional incorporation of 2% polyvinyl alcohol as a protective colloid for the emulsion. Post-emulsification analysis revealed discernible reductions in both heat-sealing performance and barrier properties of PPC resin. Nevertheless， the modified material retained sufficient functionality to satisfy application requirements demanding high heat-sealing pressure. |
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