华南理工大学学报(自然科学版) ›› 2007, Vol. 35 ›› Issue (2): 89-92.

• 材料科学与技术 • 上一篇    下一篇

固定化植物醋酶一显包剂传感膜的制备与性能

马文石1 汪军1 栾崇林2   

  1. 1.华南理工大学 材料科学与工程学院,广东 广州 510640; 2. 深圳职业技术学院 精细化工系,广东 深圳I  518055
  • 收稿日期:2005-12-01 出版日期:2007-02-25 发布日期:2007-02-25
  • 通信作者: 马文石(1962-),男,博士,副教授,主要从事功能材料、胶粘剂研究. E-mail:mcwshma@scut. edu.cn
  • 作者简介:马文石(1962-),男,博士,副教授,主要从事功能材料、胶粘剂研究.

Preparation and Properties of the Sensing Membranes Immobilizing Plant Esterase-Chromogenic Agent

Ma Wen-shiwang JunLuan Chong-lin2   

  1. 1. School of Materials Science and Engineering , South China Univ. of Tech. , Guangzhou 510640 , Guangdong , China;2. Dept. of Fine Chemistry , Shenzhen Polytechnic , Shenzhen 518055 , Guangdong , China
  • Received:2005-12-01 Online:2007-02-25 Published:2007-02-25
  • Contact: 马文石(1962-),男,博士,副教授,主要从事功能材料、胶粘剂研究. E-mail:mcwshma@scut. edu.cn
  • About author:马文石(1962-),男,博士,副教授,主要从事功能材料、胶粘剂研究.

摘要: 采用聚乙烯醇(PVA) 与四乙氧基硅炕(TEOS) 通过原位溶肢-凝肢法制备了PVAl Si02 有和ν无机杂化溶肢,并将显色剂和植物醋酶分散于溶肢中,干燥成膜,得到一类透明度高、亲水-亲丙嗣性可调、贮存性好的传感膜.该传感膜在乙酸-α-荼西旨溶液中,会于可见光520nm 处出现一个新的吸收峰.传感膜在制备后的12 天内活性明显下降,之后基本保持稳定,并且冷藏活性下降率要比室温保存的小很多.但不论是冷藏还是在室温下保存,被固定在杂化膜中的酶活稳定性都比在溶液状态下的明显提高.

关键词: 聚乙烯醇, 二氧化硅, 有权/无机杂化, 植物酣酶, 显色剂, 传感膜

Abstract:

PV AlSi02 organic-inorganic hybrid sol was prepared by means of in-situ sol-ge1 method , with poly( vinyl alcohol) (PV A) and tetraethylorthosilicate (TEOS) as the materials. Then , the sol with the dispersion of chromo-genic agent and plant esterase was dried to form a kind of transparent sensing membrane with controllable hydrophi-licity-acetonephilicity and good storability. It is shown that , (1) when the membrane is soaked in α-naphthyl ace-tate solution , an absorption band occurs at 520 nm in the ultravio1et-visible spectrum; (2) the enzyme activity of the sensing membrane obviously decreases in 12 days until it reaches a constant value; (3) the decreasing rate of enzyme activity of the sensing membrane in cold storage is significantly smaller than that in room temperature storage; and (4) the stability of the enzyme immobilized in the hybrid membrane is greatly improved , as compared with that of the enzyme in solution.

Key words: poly (vinyl alcohol), silica, organic-inorganic hybrid, plant esterase, chromogenic agent, sensing membrane