PDF (3831K)
摘要
采用γ-氨丙基三乙氧基硅烷(KH-550)对麦饭石(MS)进行改性处理,通过静电纺丝法将改性后的麦饭石(KH550-MS)与聚乳酸(PLA)复合,制备了一种可降解MS/PLA复合纤维薄膜,并研究了其对空气中悬浮微粒的过滤行为,探讨了KH-550改性前后MS的表面特性、分散性、活化率及粒径分布情况。结果表明:经KH-550改性后,MS的表面活化率从5.5%增至91%,粉体表面每nm2羟基数从8.6降至3.2,比表面积从22213.78m2/kg增至23546.28m2/kg,颗粒平均直径由0.31μm降至0.29μm。对空气中悬浮微粒的过滤性能测试结果表明:KH550-MS/PLA复合纤维膜对粒径在0.5～1μm、1～2.5μm、2.5～5μm以及5～10μm不同区间粒径的颗粒过滤效率分别为91.32%、97.11%、99%和99%,高于MS/PLA复合纤维膜。复合纤维膜具有良好的透气性,初阻力维持在34～37Pa范围内。与MS/PLA复合纤维膜相比,KH550-MS/PLA复合纤维膜过滤性能明显增强。
Abstract
3-Aminopropyltriethoxysilane(KH-550) was adopted to modify the medical stone (MS),and a kind of degradable modified MS/poly-lactic acid(PLA) composite fiber membrane was prepared.The filtration behavior of membrane for suspended particles in air was investigated detaily.The surface characteristics,dispersion,activated rate and particle size distribution of MS was discussed before and after KH-550 modification.The results indicated that the surface activated rate increased from 5.5% to 91%,the hydroxyl number per nm2 on the surface of MS powder declined from 8.6 to 3.2 by modification with KH550,specific surface area increased from 22213.78m2/kg to 23546.28m2/kg,and particle average diameter decreased from 0.31μm to 0.29μm.The results of filtration behavior test indicated that the filtration efficiency of membrane with modified powder for suspended particle with size in 0.5～1μm,1～2.5μm,2.5～5μm and 5～10μm were 91.32%,97.11%,99%,and 99%,respectively,which were obviously higher than membrane with unmodified powder.Moreover,the membrane with modified powder had good air permeability,and the initial resistance maintained in the range of 34～37Pa.Compared with unmodified MS/PLA,the filtration performance of modified MS/PLA membrane was obviously enhanced.
关键词
静电纺丝
/
过滤性能
/
聚乳酸
/
麦饭石
/
γ-氨丙基三乙氧基硅烷
Key words
electrospinning
/
filtration performance
/
PLA
/
medical stone
/
3-Aminopropyltriethoxysilane(KH-550)
改性麦饭石/聚乳酸复合纤维薄膜的制备及其空气过滤性能研究[J].
化工新型材料, 2018, 46(12): 233-237 DOI:
[1] Li X,Wang N,Fan G,et al.Electreted polyetherimide-silica fibrous membranes for enhanced filtration of fine particles[J].Journal of Colloid & Interface Science,2015,439:12-20.
[2] Zhang S,Hui L,Xia Y,et al.Tailoring mechanically robust poly(m-phenylene isophthalamide) nanofiber/nets for ultrathin high-efficiency air filter[J].Scientific Reports,2017,7:40550.
[3] Wan H,Na W,Yang J,et al.Hierarchically structured polysulfone/titania fibrous membranes with enhanced air filtration performance[J].Journal of Colloid & Interface Science,2014,417(3):18-26.
[4] 郭莉莉.聚L-乳酸基驻极体膜的制备及其性能研究[D].郑州:郑州大学,2013.
[5] 李祎.生物降解高分子纳米复合材料的制备与性能研究[D].长春:吉林大学,2013.
[6] Wang W B,Xu J X,Wang A Q.A pH-,salt- and solvent-responsive carboxymethylcellulose-g-poly(sodium acrylate)/medical stone su-perabsorbent composite with enhanced swelling and responsive properties[J].Express Polymer Letters,2011,5(5):385-400.
[7] 徐明双,李青山,周光举,等.聚丙烯-麦饭石功能纤维的性能[J].功能高分子学报,2009,22(4):427-430.
[8] 王维清,冯启明,袁昌来.一种新型无机抗菌剂载体——麦饭石[J].中国矿业,2005,14(1):45-48.
[9] Mercante L A,Pavinatto A,Iwaki L E,et al.Electrospun polyamide 6/poly(allylamine hydrochloride) nanofibers functionalized with carbon nanotubes for electrochemical detection of dopamine[J].ACS Applied Materials & Interfaces,2015,7(8):4784.
[10] 高正楠,江小波,郭锴.KH550的水解工艺及其对SiO2表面改性的研究[J].北京化工大学学报(自然科学版),2012,39(2):7-12.
[11] 铁生年,李星.硅烷偶联剂对碳化硅粉体的表面改性[J].硅酸盐学报,2011,39(3):409-413.
[12] 陈慧娟,朱建君,韩培娟,等.固体核磁共振研究改性纳米SiO2的表面结构[J].化学研究与应用,2013(7):1030-1034.
[13] 赖登旺,杨军,谭美军,等.KH550疏水改性埃洛石的表征与研究[J].包装学报,2010,2(2):18-20.
[14] 王凡非,冯启明,王维清,等.硅烷偶联剂KH550对超细石英粉的改性[J].材料导报,2014,28(18):70-73,98.
基金资助
黑龙江省青年科学基金(QC2014C051);国家自然科学基金委员会青年科学基金(51603057)
