Preparation of PLLA/g-HNTs Composite Nanofiber Membranes by Electrospinning and Studies on Their Properties

Hui-hua Li; Bing-hong Luo; Xiao-peng Qin; Jian-hua Li; Chang-ren Zhou

doi:10.11777/j.issn1000-3304.2015.14167

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Preparation of PLLA/g-HNTs Composite Nanofiber Membranes by Electrospinning and Studies on Their Properties

Research Article | 更新时间：2021-03-19

- Preparation of PLLA/g-HNTs Composite Nanofiber Membranes by Electrospinning and Studies on Their Properties
- Acta Polymerica Sinica Issue 1, Pages: 31-40(2015)
- 作者机构：
  
  暨南大学理工学院材料科学与工程系人工器官与材料教育部工程中心,广州,510630
- 作者简介：
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2015.14167
  CLC：
- Published：20 January 2015，
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Hui-hua Li, Bing-hong Luo, Xiao-peng Qin, Jian-hua Li, Chang-ren Zhou. Preparation of PLLA/g-HNTs Composite Nanofiber Membranes by Electrospinning and Studies on Their Properties. [J]. Acta Polymerica Sinica (1):31-40(2015)
DOI：

Hui-hua Li, Bing-hong Luo, Xiao-peng Qin, Jian-hua Li, Chang-ren Zhou. Preparation of PLLA/g-HNTs Composite Nanofiber Membranes by Electrospinning and Studies on Their Properties. [J]. Acta Polymerica Sinica (1):31-40(2015) DOI： 10.11777/j.issn1000-3304.2015.14167.

摘要

以辛酸亚锡为催化剂

利用HNTs表面的羟基引发L-LA开环聚合

合成了表面接枝聚(L-乳酸)(PLLA)链段的埃洛石纳米管(g-HNTs)

通过红外、热失重和透射电镜对改性前后HNTs的组成与形貌进行了观察;然后采用静电纺丝技术制备了PLLA纳米纤维膜以及不同组成的PLLA/HNTs和PLLA/g-HNTs复合纳米纤维膜

探讨了纺丝条件对纳米纤维膜形貌的影响

并对复合膜的组成、形貌、力学性能和细胞相容性进行了研究.结果表明

当HNTs与L-LA的摩尔投料比为1:10时

g-HNTs表面PLLA链段的接枝率为14.22%

HNTs纳米管的形态在接枝后变化不大

易于在无水乙醇中分散.电压强度和进样速率对纤维膜的形貌有一定影响

当电压强度为15 kV、进样速率为1 mL/h时

电纺纤维的直径较为均匀.复合纤维膜中g-HNTs在基体PLLA中的分散性以及与基体的界面相容性要优于相应的HNTs

当g-HNTs含量高达40%时

复合纳米纤维膜中的纤维形态仍然保持较好

可以得到连续、粗细较均匀的纤维;随着HNTs和g-HNTs含量增加

复合纳米纤维膜的拉伸强度和模量先增大后下降

当HNTs和g-HNTs的含量为5%时

两种复合纳米纤维膜的拉伸强度和模量均达到最大值

但PLLA/g-HNTs组复合纳米纤维膜的拉伸强度始终大于相应的PLLA/HNTs组.体外3T3细胞培养结果显示

PLLA/g-HNTs复合纳米纤维膜具有良好的细胞相容性

且优于相应的PLLA和PLLA/HNTs纳米纤维膜.

Abstract

Through the ring-opening polymerization of L-lactide initiated by hydroxyl groups on the surface of HNTs using stannous 2-ethylhexanoate as catalyst

halloysite nanotubes surface-grafted with poly(L-lactic acid) (PLLA) segments (g-HNTs) were synthesized.The compositions and morphologies of the modified and unmodified HNTs were observed by Fourier transformation infrared (FTIR)

thermal gravimetric analysis (TGA) and transmission electron microscopy (TEM).Then

a series of PLLA

PLLA/HNTs and PLLA/g-HNTs nanofiber membranes were prepared by electrospinning

the influences of the spinning conditions on the morphologies of the nanofiber membranes were discussed

and the composition

micrograph

interfacial compatibility

tensile properties and cellular compatibility of the composite membranes were studied too.Results showed that the grafting percentage of PLLA segments on the surface of g-HNTs was 14.22% as the molar ratio of HNTs to L-lactide was 1:10.The tubular morphology of HNTs changed little after surface grafting

and g-HNTs can easily disperse in anhydrous ethanol.The voltage and the feed rate have effects on the morphology of fiber membranes

when the voltage was 15 kV and feed rate was 1 mL/h

the diameter of the electrospinning fiber was relatively uniform.The dispersion and interfacial compatibility of g-HNTs in PLLA matrix were superior to those of pristine HNTs

when the content of g-HNTs increased up to 40 wt%

the fiber micrograph of the PLLA/g-HNTs composite membranes continues to remain good

and continuous and relatively uniform fiber can be got.With the content of HNTs and g-HNTs increased

the tensile strength and modulus increased first and then decreased

as the filler content was 5 wt%

the highest tensile strengths and moduli were obtained for both of the PLLA/HNTs and PLLA/g-HNTs composite nanofiber membranes.However

the tensile strength and modulus of the PLLA/g-HNTs composite nanofiber membranes were always higher than those of PLLA/HNTs composite nanofiber membranes at all filler contents due to the good adhesive strength between the g-HNTs and PLLA matrix.The results of 3T3 cells culture in vitro indicated that the cellular compatibility of the PLLA/g-HNTs composite nanofiber membranes is very good

and better than that of pure PLLA and PLLA/HNTs nanofiber membranes.

关键词

聚乳酸埃洛石表面接枝静电纺丝性能

Keywords

Poly(L-lactic acid)Halloysite nanotubesSurface graftingElectrospinningPerformance

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Related Institution

College of Chemistry and Materials Science, Key Laboratory of Polymer Materials of Fujian Province, Fujian Normal University, Fuzhou 350007

Department of Chemistry and Environment Engineering, Key Laboratory for Green Chemical Technology of Fujian Higher Education, Wuyi University, Wuyishan

The Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University

State Key Laboratory of Polymer Materials Engineering, College of Polymer Science and Engineering, Sichuan University

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