A STUDY ON PHASE TRANSITION KINETICS OF TEMPERATURE-SENSITIVE N-ISOPROPYLACRY- LAMIDE HYDROGELS AND ITS APPLICATION

ZHOU Xiao; HE Qi-wei

doi:null

您当前的位置：

首页 >

文章列表页 >

A STUDY ON PHASE TRANSITION KINETICS OF TEMPERATURE-SENSITIVE N-ISOPROPYLACRY- LAMIDE HYDROGELS AND ITS APPLICATION

Research Article | 更新时间：2021-03-19

- A STUDY ON PHASE TRANSITION KINETICS OF TEMPERATURE-SENSITIVE N-ISOPROPYLACRY- LAMIDE HYDROGELS AND ITS APPLICATION
- Acta Polymerica Sinica Issue 1, Pages: 74-80(1992)
- 作者机构：
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：20 February 1992，
扫描看全文
ZHOU Xiao, HE Qi-wei. A STUDY ON PHASE TRANSITION KINETICS OF TEMPERATURE-SENSITIVE N-ISOPROPYLACRY- LAMIDE HYDROGELS AND ITS APPLICATION. [J]. Acta Polymerica Sinica (1):74-80(1992)
DOI：

ZHOU Xiao, HE Qi-wei. A STUDY ON PHASE TRANSITION KINETICS OF TEMPERATURE-SENSITIVE N-ISOPROPYLACRY- LAMIDE HYDROGELS AND ITS APPLICATION. [J]. Acta Polymerica Sinica (1):74-80(1992) DOI：

摘要

研究指出表观二级动力学方程可以很好地描述N-异丙基丙烯酰胺水凝胶的溶胀和消溶胀动力学.即溶胀动力学方程为dR/dt=k1(Re-R)2

消溶胀动力学方程为-dR/dt=kc(R-Re)2.把这种水凝胶用于分离高分子水溶液时可引入“单位溶张比分离循环的合理时耗”这样一个参量.它根据溶胀和消溶胀过程中的起始溶胀比、平衡溶胀比、表观溶胀动力学常数和表观消溶胀动力学常数求出.具体公式为△t1(Ts

Tc)=2/[Rc(Ts)-R0(Ts)]2ks(Ts)+15/[R0(Tc)- Rs(Tc)]2kc(Tc)1/2在理想情况下

分离过程的“总合理时耗”与△t_1成正比

比例系数为分离过程中的除水总量与干凝胶用量的比值

即△tr=WW/WG·△t1.当根据二个动力学方程求得的总时耗计算值处于(0.9△tr

1.1△tr)范围内时

表明所选干凝胶用量和循环溶胀比区段均合适.

Abstract

The phase transition kinetics of temperature-sensitive N-isopropylacrylamide hydrogel was investigated. It was indicated that the apparent second order kinetic equations describe its swelling and collapse behavior quite well. Its swelling kineticequation is (dR)/(dt)= ks(Rg- R)2 and the collapse one is- (dR)/(dt)= (kc(R-Rc)2. A para-meter of "reasonable time of separating circle per swelling ratio" was introduced for describing the separating behavior of polymer water solution. It can be calculated from initial swelling ratio

equilibrium swelling ratio

swelling kinetic constant and collapse kinetic constant. The equation is At the ideal case

total time for separation is proportional to The ratio factor is equal to the total water weight separated divided by the dry hydrogel weight

that is When the calculated value of the total time based on the two ki-netic equations was located into the region of it means that the dry hydrogel weight chosen and the circular swelling ratio region chosen are reasonable.

关键词

聚N-异丙基丙烯酰胺聚合物溶胶水凝胶溶胀溶胀动力学相转变

Keywords

references

更多指标>

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

SYNTHESIS,CHARACTERIZATION AND SWELLING OF A CHEMICALLY CROSS-LINKED PVA HYDROGEL

SWELLING BEHAVIOR OF MODIFIED CMC HYDROGEL PREPARED BY RADIATION CROSSLINKING

SYNTHESIS AND SWELLING CHARACTERIZATIONS OF α,β- POLY DL ASPARAMIDE DERIVATIVE HYDROGEL

PREPARATION AND PROPERTIES OF TEMPERATURE-SENSITIVE N-ISOPROPYLACRYLAMIDE COPOLYMER HYDROGELS CONTAINING ADAMANTYL GROUPS

STUDIES ON SWELLING BEHAVIOR OF POLY(ACRYLIC ACID-co-OCTADECYL METHACRYLATE) HYDROPHOBIC ASSOCIATION HYDROGELS WITH HIGH MECHANICAL PROPERTIES

Related Author

No data

Related Institution

浙江科技学院环境与资源学院

浙江大学高分子科学与工程学系高分子功能构造与合成教育部重点实验室

Postal code：100190
Tel：010-62588927 Email：gfzxb@iccas.ac.cn
Technical support is provided by Beijing Founder electronics co., LTD 京ICP备05002797号-8 京公网安备11010802024621
It is recommended to read the content of this site in Chrome&IE9+. Please switch to extreme mode in browser 360.
Cookies We use cookies to help provide and enhance our service and tailor content. By continuing, you agree to the use of cookies.

⁰