反气相色谱法表征漆酚钛螯合高聚物的表面性质  

Surface characterization of urushiol-titanium chelate polymers by inverse gas chromatography

作　　者：徐艳莲[1,2] 林金火[1,2] 夏建荣[1] 胡炳环[2] 

机构地区：[1]福建师范大学化学与材料学院,福建福州350007 [2]福建省高分子材料重点实验室,福建福州350007

出　　处：《色谱》2011年第3期249-253,共5页Chinese Journal of Chromatography

基　　金：国家自然科学基金项目(Nos.51073037;50973020);福建省自然科学基金项目(No.2010J01030);福建省科技厅计划项目(No.2007F5031)

摘　　要：漆酚钛螯合高聚物(UTP)具有优异的耐强酸、耐强碱、耐盐类溶液、耐多种有机溶剂和耐热性能。为进一步扩大其应用领域提供理论和实验依据,采用反气相色谱法(IGC)测定了UTP在70、80、90、100和110℃下的表面色散自由能和表面Lewis酸碱常数。以正戊烷(C5)作为标定色谱死时间的探针分子,正己烷、正庚烷、正辛烷和正壬烷作为非极性探针分子,计算了不同温度下UTP的色散表面自由能;以四氢呋喃、丙酮和三氯甲烷作为极性探针分子,计算得到了UTP表面的酸碱作用吸附自由能和吸附焓。实验结果表明:在70、80、90、100和110℃时UTP的色散表面自由能分别为37.68、33.53、35.92、24.01和31.32 mJ/m2;UTP为弱的Lewis碱,Lewis酸常数Ka为0.185 3,碱常数Kb为0.966 2。这一结果对研究漆酚金属螯合高聚物的表面性质与应用具有指导作用。Urushiol-titanium chelate polymer （ UTP）, the reaction product of urushiol with titanium compound, is a special eco-friendly polymer with excellent performances, such as strong acids-resistance, strong alkalis-resistance, salt solution-resistance and several organic solventresistance. Inverse gas chromatography （IGC） was used to measure the dispersive component of surface free energy （ γsd） and the Lewis acid-base parameters of UTP in this work. The γsd and the acid/base characters of UTP＇ surfaces were estimated by the retention time with different non-polar and polar probes at infinite dilution region, n-Pentane （ C5 ） , n-hexane （ C6） , nheptane （ C7 ）, n-octane （ C8 ） and n-nonane （ C9 ） were chosen as the non-polar probes to characterize the γsd. Trichloromethane （CHCI3 ） , tetrahydrofuran （THF） and acetone were chosen as polar probes to detect the Lewis acid-base parameters. The specific free energy （△GaAB） and the enthalpy （△HAB） of adsorption corresponding to acid-base surface interactions were determined. By correlating △H2B with the donor and acceptor numbers of the probes, the acidic （Ka） and the basic （Kb ） parameters of the samples were calculated. The results showed that the dispersive components of the free energy of UTP were 37.68, 33.53, 35.92, 24.01 and 31.32 mJ/m2 at 70, 80, 90, 100 and 110 ℃, respectively. The Lewis acidic number Ka of UTP was 0. 185 3, and the Lewis basic number Kb was 0. 966 2. The results were of great importance to the study of the surface properties and the applications for urushiol-metal chelate polymers.

关 键 词：反气相色谱 表面性质 漆酚钛螯合高聚物 

分 类 号：O658[理学—分析化学]