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| Preparation of Hydrophobic Sugarcane Pith Microparticles and Study on the Oil-Water Separation Performance of Their Polyurethane Composite Foam Materials |
| Received:February 10, 2026 Revised:February 23, 2026 |
| DOI：10.11981/j.issn.1000-6842.2026.02.72 |
| Key Words:sugarcane pith;AKD modification;hydrophobic microparticles;polyurethane foam;oil-water separation |
| Fund Project:兴辽英才计划（XLYC1802025）。 |
| Author Name | Affiliation | Postcode | | GAO Longxue* | School of Light Industry and Chemical Engineering， Dalian Polytechnic University， Dalian， Liaoning Province， 116034 | 116034 | | PING Qingwei* | School of Light Industry and Chemical Engineering， Dalian Polytechnic University， Dalian， Liaoning Province， 116034 | 116034 | | SHENG Xueru | School of Light Industry and Chemical Engineering， Dalian Polytechnic University， Dalian， Liaoning Province， 116034 | 116034 | | ZHANG Jian | School of Light Industry and Chemical Engineering， Dalian Polytechnic University， Dalian， Liaoning Province， 116034 | 116034 | | LI Na | School of Light Industry and Chemical Engineering， Dalian Polytechnic University， Dalian， Liaoning Province， 116034 | 116034 |
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| Abstract: |
| Using sugarcane bagasse screen residue （sugarcane pith） as raw material， hydrophobic sugarcane pith microparticles （HMSP） were prepared through ethanol pretreatment， mechanical grinding， and dry modification with alkylene ketone dimer （AKD）. HMSP were then used to prepare HMSP/polyurethane composite foam materials. The results showed that ethanol pretreatment and mechanical grinding could increase the content of alcoholic and phenolic hydroxyl groups in HMSP； Furthermore， these hydroxyl groups reacted with AKD could significantly enhance the hydrophobicity of HMSP. After modification with AKD， the prepared HMSP75 derived from sugarcane pith microparticles with a particle size of ≤75 μm exhibited the highest water contact angle of 152.12°. When HMSP75 was incorporated into the polyurethane system， it markedly improved the pore structure and mechanical properties of the prepared HMSP/polyurethane composite foam materials. The HMSP-10-PUF prepared with a 10% HMSP75 mass fraction exhibited the highest water contact angle， reaching 135.02°. At strain of 70%， the compressive stress of HMSP-10-PUF was approximately 0.35 MPa. It exhibited excellent oil-water separation performance in both “floating oil-water” and “sinking oil-water” mixed systems， with an oil absorption capacity of approximately 25 g/g for dichloromethane as simulated oil phase. Moreover， its oil absorption capacity remained at over 80% of the initial value even after 10 times of adsorption-desorption cycles. |
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