从分子设计的角度出发,选用具有优良温敏性的N-异丙基丙烯酰胺(NIPA)为基本原料,制备了温度敏感水凝胶,系统研究了水凝胶的基本物理性能(密度、平均分子量、交联密度、平衡态水含量、固定电荷密度等),测试了水凝胶在不同离子强度下的溶胀、退溶胀性能,并对其响应机理进行了探讨,同时对水凝胶的机械性能进行了测试.结果表明:温度敏感水凝胶的溶胀受离子强度和温度的影响很大,离子强度越高,溶胀率越低;其机械强度随温度变化显著.
参考文献
| [1] | Hiroki K;Kohoi S;Naoya O .Temperature-responsive interpenetrating polymer networks constructed with poly (acrylic acid) and poly (N,N-dimet-hylacrylamide)[J].Macromolecules,1994,27:947-952. |
| [2] | Tasdelen B;Kayaman-Apohan N;Guven O et al.pH-thermoreversible hydrogels Ⅰ:synthesis and characterization of poly (N-isopropylamide/maleic acid)copolymeric hydrogels[J].Radiat Phys & Chem,2004,69:303-310. |
| [3] | Bilia A;Carelli V;Nannipieri E et al.In vitro evaluation of a pH-sensitive hydrogels for control of GI drug delivery from silicone-based matrices[J].International Journal of Pharmaceutics,1996,130:83-92. |
| [4] | Saraydin D;Karadag E;Isikver Y;Sahiner N;Guven O .The influence of preparation methods on the swelling and network properties of acrylamide hydrogels with crosslinkers[J].Journal of Macromolecular Science. Pure and Applied Chemistry,2004(4):419-431. |
| [5] | Takigawa T;Morino Y;Urayama K et al.Poisson's ratio of polyacrylamide (PAAm) gels[J].Polym Gel & Network,1996,4:1-5. |
| [6] | Xue W.;Champ S.;Huglin MB.;Jones TGJ. .Rapid swelling and deswelling in cryogels of crosslinked poly(N-isopropylacrylamide-co-acrylic)[J].European Polymer Journal,2004(4):703-712. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%