Synthesis and characterization of poly-L-lysine grafted SBA-15 using NCA polymerization and click chemistry

被引:28
|
作者
Kar, Mrityunjoy [1 ]
Malvi, Bharmana [1 ]
Das, Anindita [1 ]
Panneri, Suyana [1 ]
Sen Gupta, Sayam [1 ]
机构
[1] Natl Chem Lab, Div Chem Engn, CReST Unit, Pune 411008, Maharashtra, India
关键词
MESOPOROUS SILICA; SURFACE; PARTICLES; STYRENE; FUNCTIONALIZATION; POLYPEPTIDE; COPOLYMER; TRIBLOCK; RELEASE; ATRP;
D O I
10.1039/c0jm04589f
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Poly-L-lysine (PLL) grafted ordered mesoporous material was prepared by a combination of NCA polymerization and click chemistry. Large pore SBA-15 with a mesopore diameter of similar to 12 nm was synthesized using a previously reported method. The surface of this SBA-15 material was modified with azidopropyl groups. This "clickable" SBA-15 was then reacted with an alkyne terminated poly-L-lysine synthesized by the ring-opening polymerization of 3-cbz-L-lysine NCA with N-TMS propargylamine as the initiator. This procedure allows grafting of a uniform polymer film with a high polymer loading. No appreciable pore blocking was observed upon grafting of PLL. No change in the periodic structure of the SBA-15 was observed throughout the grafting process. The SBA-15 PLL conjugate was characterized using C-13 and Si-29 NMR, XRD, FT-IR, N-2 adsorption-desorption and thermogravimetry. The results indicate that polypeptides can be easily grafted onto various ordered mesoporous materials by this "grafting to" methodology with accessible pores and high loadings of the polypeptide.
引用
收藏
页码:6690 / 6697
页数:8
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