摘要
以咪唑为封闭剂,异佛尔酮二异氰酸酯(IPDI)、聚己内酯二醇、N-甲基二乙醇胺(MDEA)、己二酸二酰肼(ADH)、双酚A、自制N-[(1,1-二甲基-2-乙酰基)乙基]-β-二羟乙氨基丙酰胺(DDP)为原料制备了封闭型阳离子聚氨酯纸张增强剂(CBPU)。用FTIR、1HNMR、动态激光光散射(DLLS)和SEM对CBPU分子结构、乳液粒径及纸张表面形貌进行了表征,研究了封闭率对乳液粒径的影响。探讨了封闭率及乳液添加量对纸张力学性能的影响。结果表明,产物分子结构中出现了叔胺基、咪唑环和氨基甲酸酯结构。乳液粒径随着封闭率的增加而增大。增加CBPU的封闭率及用量能明显提高纸张的强度指标,尤其是湿强度。当CBPU封闭率及添加量分别为10%与5%(以绝干浆质量计)时,纸张湿强度为30.32%。
Cationic imidazole-blocked polyurethane （CBPU） was prepared from the raw materials of isophorone diisocyanate （ IPDI ）, polycaprolactone glycol, methyldiethanolamine （ MDEA ）, ADH, bisphenol A, N- [ （ 1, 1 -dimethyl-2-acetyl ） ethyl ] β-dihydroxyethylamino propanamide （ DDP ）, using imidazole as the blocking agent. Fourier transform infrared spectroscopy （ FTIR）, ~ HNMR, dynamic laser light scattering（DLLS） and SEM were used to characterize the structure of CBPU, the particle size and the surface morphology of the paper. The influence of the blocked ratio on the particle size was studied. At the same time, the effects of the blocked ratio and the dosage of CBPU on the physical properties of the treated paper were also studied. The experimental results show that the structures of tertiary amine group, imidazole ring and urethane group are found in CBPU molecular structure. The particle size is nearly related to the blocked ratio of CBPU. The paper strength, especially the wet strength can be obviously increased with the increase of the blocked ratio and the dosage of CBPU. The wet strength is 30.32% when the blocked ratio and dosage of CBPU are 10% and 5% respectively.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2012年第11期1121-1126,共6页
Fine Chemicals
基金
陕西省重大科技创新项目(2011zkc04-3)
陕西省教育厅科研计划项目(12JK0595)~~
关键词
阳离子水性聚氨酯
纸张增强剂
咪唑
封闭率
酮肼交联
造纸化学品
cationic waterborne polyurethane
paper strengthening agent
imidazole
blocked ratio
ketone-hydrazide crosslinking
paper-making chemicals
