摘要
以凹凸棒石(AT)为原料、过硫酸钾为引发剂、N,N-亚甲基双丙烯酰胺为交联剂、丙烯酰胺(AM)、丙烯酸(AA)两种单体同时对海藻酸钠(SA)进行接枝改性,采用水溶液聚合法制备了海藻酸钠接枝丙烯酸-丙烯酰胺共聚物/凹凸棒石复合材料。考察了各合成因素对复合材料吸液倍率的影响,并采用FTIR、SEM对复合材料进行了表征。结果表明,当丙烯酰胺与丙烯酸的质量比为5 1∶、海藻酸钠质量分数为15%(占单体丙烯酸质量,下同)、凹凸棒石用量为25%、交联剂用量为0.095%、引发剂用量为0.55%和反应温度为80℃时,制备的复合材料的吸蒸馏水倍率最高,达到1 693.3 g/g。FTIR表明,海藻酸钠、丙烯酸、丙烯酰胺和凹凸棒石共同参与了接枝聚合反应。SEM表明,凹凸棒石的引入,复合材料的表面致密但存在大小不一的孔隙,有利于提高复合材料的吸液倍率。
Sodium alginate grafted acrylic acid-acrylamide copolymers/attapulgite composite using sodium alginate （SA）, acrylic acid （AA）, acrylamide （AM） was synthesized by aqueous solution polymerization with and attapulgite （AT） as raw material, potassium persulfate as initiator, and N, N＇-methylene-bis-acrylamide as crosslinker. The effects of the synthesis factors on water absorbency were investigated. The composites were characterized by FTIR and SEM. The results showed that when the mass ratio of acrylamide： acrylic acid was 5：1, the content of sodium alginate, attapulgite, crosslinker and initiator was 15%, 25%, 0. 095%, 0. 55% （ compare to the mass of monomer）, respectively, and the absorbency of the composites was highest and the water absorbent rate of the sample was 1 693.3 g · g ^-1 at 80 ℃. The FTIR spectra showed that sodium alginate and AT participated in graft polymerization reaction with AA and AM. The structure of the sodium alginate with acrylic acid-acrylamide copolymers/attapulgite composites shown by SEM was tight but own porous surface and different sizes of holes which are beneficial to improve the water absorbent rate.
出处
《塑料工业》
CAS
CSCD
北大核心
2012年第9期96-99,共4页
China Plastics Industry
基金
湖北省自然科学基金资助项目(2011CDC040
2010CDB00903)
湖北省高等学校优秀中青年科技创新团队计划资助项目(T201006)
恩施州科学技术项目
作者简介
作者简介：胡盛，男，1983年生，硕士，讲师，主要从事复合材料的研究。cailiaoxue007@126．com
