以聚二甲基硅氧烷(PDMS)、环己烷为原料,蔗糖为模板,采用模板滤取法简单安全地制备出PDMS三维多孔材料。采用扫描电子显微镜、接触角测试、万能力学试验机对PDMS多孔材料的结构形貌及性能进行表征,并考察了蔗糖粒径和环己烷用量对PDMS多孔材料吸油性能的影响。结果表明:采用不同粒径的蔗糖混合物作为模板、环己烷用量为6g制得的PDMS多孔材料的吸油性能最佳,吸油率最高达到1521%。此外,PDMS多孔材料可通过机械挤压的方式循环使用20次以上,且不引起力学强度和吸油性能的下降。
Three-dimensional porous polydimethylsiloxane (PDMS) material was prepared by using PDMS and cyclohexane as raw materials,sugar as template,through template-leaching method which was simple and safe.The morphology and properties of porous PDMS was characterized with scanning electron microscopy (SEM),contact angle (CA) and universal testing machine.The effects of sugar size and cyclohexane amount on the oil-absorption performance of PDMS were studied.The experiment results indicated that when the amount of cyclohexane was 6.0g,the PDMS obtained with different size of sugar exhibited the optimal oil-absorption capacity of 1521%.Furthermore,the absorbed oils or organic solvents can be recovered by compressing porous PDMS,and after 20 absorbing/recovering cycles,porous PDMS showed little loss of their absorption capacities and mechanical properties.
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基金资助
国家自然科学基金项目(21474091,51707175);浙江省自然科学基金项目(LQ16E030009,LY18B040005);全国大学生创新创业训练计划项目(201710337022);浙江省大学生科技创新活动计划(新苗人才计划)项目(2017R403012)
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