欢迎登录材料期刊网

材料期刊网

高级检索

采用可逆加成—断裂链转移(RAFT)聚合方法,合成了不同嵌段比的两亲性嵌段共聚物聚苯乙烯-b-聚乙烯基吡咯烷酮(PSt-b-PVP)。通过傅里叶变换红外光谱(FT-IR)、核磁共振(1 HNMR)、凝胶渗透色谱(GPC)等测试手段对其结构进行表征。将PSt-b-PVP与添加剂在选择性溶剂中进行自组装,然后采用水洗除去添加剂,得到聚合物孔结构。采用场发射扫描电子显微镜(FESEM)研究聚合物孔材料的形态和尺寸。探讨了添加剂,温度,溶剂和嵌段比对孔尺寸的影响。结果表明,采用含—OH 官能团或者单体本身为添加剂可以减小孔径,采用易挥发溶剂有利于孔的形成,降低温度有利于孔径尺寸减小,亲疏水嵌段为 PSt101-b-PVP79有利于小尺寸孔的形成。

A series of diblock copolymers,polystyrene-block-poly(vinyl pyrrolidone)(PSt-b-PVP),with different hydrophilic/hydrophobic ratios were synthesized by reversible addition fragmentation chain transfer (RAFT) polymerization.The structures and properties of the diblock copolymers were characterized by FT IR,1 H NMR and GPC.Different additives and a series of PSt-b-PVP with different hydrophilic/hydrophobic ratios dissolved in selective solvents.After solvent evaporation,the transparent film was obtained by rising with water.FESEM was used to study the morphology and size of the polymer porous material.The influence of additives,solvent e-vaporation temperature,the solvents and the hydrophilic/hydrophobic ratios on pore size were also studied.The results show that if the structure that we uses contains —OH functional groups or the monomer itself is used as additive,the porous polymer formed would have smaller holes.Meanwhile,reducing the heat is benefit to reduce the size of porous.And if we can use the structure which hydrophilic/hydrophobic ratios is PSt101-b-PVP79 ,it would be more easier to form smaller porous.Besides,using volatile solvent can be good for the forming of por-ous.

参考文献

[1] 疏亿万;刘晓亚;陈道勇.PS-b-P4VP/PFOA配合物在氯仿中的自组装及形态表征[J].化学学报,2006(18):1937-1939.
[2] Nadia Ouarti;Pascal Viville;Roberto Lazzaroni.Control of the Morphology of Linear and Cyclic PS-b-PI Block Copolymer Micelles via PS Addition[J].Langmuir: The ACS Journal of Surfaces and Colloids,20054(4):1180-1186.
[3] Susan E.Burke;Adi Eisenberg.Kinetics and Mechanisms of the Sphere-to-Rod and Rod-to-Sphere Transitions on the Ternary System PS_(310)-6-PAA_(52)/Dioxane/Water[J].Langmuir: The ACS Journal of Surfaces and Colloids,200121(21):6705-6714.
[4] Uehara, H.;Kakiage, M.;Sekiya, M.;Sakuma, D.;Yamonobe, T.;Takano, N.;Barraud, A.;Meurville, E.;Ryser, P..Size-selective diffusion in nanoporous but flexible membranes for glucose sensors[J].ACS nano,20094(4):924-932.
[5] Kazakov S.;Kaholek M.;Teraoka I.;Levon K..UV-induced gelation on nanometer scale using liposome reactor[J].Macromolecules,20025(5):1911-1920.
[6] Hiroaki Sai;Kwan Wee Tan;Kahyun Hur;Emily Asenath-Smith;Robert Hovden;Yi Jiang;Mark Riccio;David A. Muller;Veit Elser;Lara A. Estroff;Sol M. Gruner;Ulrich Wiesner.Hierarchical Porous Polymer Scaffolds from Block Copolymers[J].Science,2013Aug.2 TN.6145(Aug.2 TN.6145):530-534.
[7] Kuila, Biplab K.;Gowd, E. Bhoje;Stamm, Manfred.Supramolecular Assembly of Poly(styrene)-b-poly(4-vinylpyridine) and 1-Pyrenebutyric Acid in Thin Film and Their Use for Nanofabrication[J].Macromolecules,201018(18):7713-7721.
[8] 张斯;曾文娟;徐欢;易国斌.两亲性嵌段共聚物聚乙烯吡咯烷酮-b-聚己内酯的合成及自组装行为[J].高分子材料科学与工程,2014(12):11-15.
[9] Mark C.Davies;John V.Dawkins;Douglas J.Hourston.Radical copolymerization of maleic anhydride and substituted styrenes by reversible addition-fragmentation chain transfer (RAFT) polymerization[J].Polymer: The International Journal for the Science and Technology of Polymers,20056(6):1739-1753.
[10] Poornima Madhavan;Klaus-Viktor Peinemann;Suzana P. Nunes.Complexation-Tailored Morphology of Asymmetric Block Copolymer Membranes[J].ACS applied materials & interfaces,201315(15):7152-7159.
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:
  • 1
    0%
  • 2
    0%
  • 3
    0%
  • 4
    0%
  • 5
    0%