摘要
玄武岩纤维(BF)经丙酮预处理后,再通过醇-水溶液法制备了γ-氨基丙基三乙氧基硅烷(KH550)改性的玄武岩纤维(MBF),采用FTIR、SEM和接触角测量仪对其进行了表征。将MBF作为填料与聚对苯二甲酸-己二酸丁二醇酯(PBAT)熔融共混,通过双螺杆挤出机制备了一系列不同MBF质量分数的PBAT/MBF复合材料,考察MBF质量分数对PBAT/MBF复合材料的微观形貌、热性能、热稳定性、力学性能和阻隔性能的影响。结果表明,MBF的水接触角为134.84°,表现为强疏水性;低质量分数(1%~5%)的MBF可以均匀分散在PBAT基体中起到异相成核作用,显著改善PBAT的结晶性能,当MBF质量分数为5%时,PBAT/MBF复合材料(PBAT/MBF-5%)的结晶温度最高,为76.3℃;PBAT/MBF-5%表现出最佳的力学性能,其断裂伸长率达到790%±61%;MBF显著提升了PBAT/MBF复合材料的阻隔性能,PBAT/MBF-5%的氧气和水蒸气透过系数最小为(4.45±0.07)×10^(–14) cm^(3)·cm/(cm^(2)·s·Pa)和(2.60±0.09)×10^(–13) g·cm/(cm^(2)·s·Pa)。MBF可以促进PBAT的结晶,降低自由体积,延长氧气和水蒸气的渗透路径,提升PBAT的阻隔性能,对PBAT水解性能的影响很小。
γ-Aminopropyl triethoxysilane(KH550)-modified basalt fiber(MBF)was prepared from acetone pretreated basalt fiber(BF)via alcohol-aqueous solution,and characterized by FTIR,SEM and contact angle measuring instrument.A series of polybutylene terephthalate(PBAT)/MBF composites with different MBF mass fractions were then synthesized from melting blending MBF with PBAT through twin-screw extrusion.The effects of MBF mass fraction on the microstructure,thermal properties,thermal stability,mechanical properties and barrier properties of PBAT/MBF composites were analyzed.The results showed that the water contact angle of MBF was 134.84°,indicating strong hydrophobicity.Low mass fraction(1%~5%)MBF could be uniformly dispersed in the PBAT matrix to play the role of heterogeneous nucleation,which significantly improved the crystallization properties of PBAT.When the mass fraction of MBF was 5%,the PBAT/MBF composites(PBAT/MBF-5%)exhibited the highest crystallization temperature of 76.3℃and the best mechanical properties,with an elongation at break of 790%±61%.The addition of MBF also significantly improved the barrier properties of PBAT,with the oxygen and water vapor permeability of PBAT/MBF-5%reaching up to(4.45±0.07)×10^(-14) cm^(3)·cm/(cm^(2)·s·Pa)and(2.60±0.09)×10^(-13) g·cm/(cm^(2)·s·Pa),respectively.MBF could promote the crystallization of PBAT,reduce the free volume,prolong the permeability path of oxygen and water vapor,improve the barrier property of PBAT,and have little effect on the hydrolysis property of PBAT.
作者
杜旭诚
黄岐
王培贤
魏忠
王公应
王自庆
DU Xucheng;HUANG Qi;WANG Peixian;WEI Zhong;WANG Gongying;WANG Ziqing(Key Laboratory for Green Process of Chemical Engineering of Xinjiang Bingtuan,School of Chemistry and Chemical Engineering,Shihezi University,Shihezi 832000,Xinjiang,China;Xinjiang Tianye Group Co.,Ltd.,Shihezi 832000,Xinjiang,China;Corps Carbon-based New Material Industry Innovation Research Institute,Shihezi 832000,Xinjiang,China;Chengdu Institute of Organic Chemistry,Chinese Academy of Sciences,Chengdu 610041,Sichuan,China)
出处
《精细化工》
北大核心
2025年第8期1756-1762,1771,共8页
Fine Chemicals
基金
新疆生产建设兵团“揭榜挂帅”重大科技计划项目(2022AA002)
国家自然科学基金项目(22068033)。
关键词
玄武岩纤维
聚对苯二甲酸-己二酸丁二醇酯
复合材料
结晶性能
力学性能
阻隔性能
功能材料
basalt fiber
poly(butylene adipate-co-terephthalate)
composites
crystallization properties
mechanical properties
barrier properties
functional materials
