Surface Hydrophobic Modification of Microcrystalline Cellulose by Poly(methylhydro)siloxane Using Response Surface Methodology
Surface Hydrophobic Modification of Microcrystalline Cellulose by Poly(methylhydro)siloxane Using Response Surface Methodology
复制标题
响应面法聚（甲基氢）硅氧烷对微晶纤维素的表面疏水改性
DOI：
10.3390/polym10121335
复制
发表时间：
2018
期刊：
影响因子：
5
通讯作者：
Wenbin Yang
中科院分区：
文献类型：
--
作者：
Yulin Xie;Si;Zhendong Hou;Weihua Li;Yan Wang;Xinxiang Zhang;Wenbin Yang
分别以聚甲基氢硅氧烷（PMHS）和正己烷为改性剂和溶剂，对微晶纤维素（MCC）进行表面改性。采用响应面法优化反应条件对MCC疏水性的影响。确定最佳反应条件为：PMHS浓度为0.0275%（PMHS与MCC的质量比），反应时间为20 min，干燥温度为70 °C。在最佳反应条件下，改性MCC的水接触角为141.5°。利用Design-Expert对改性MCC的反应条件进行优化选择是可行的，数学模型预测值与实验值吻合较好。用X射线光电子能谱（XPS）研究了表面化学特性。这些分析证实PMHS链附着在MCC上。由于引入了大量的甲基，MCC和PMHS之间的反应导致其疏水性的改善。
Poly(methylhydro)siloxane (PMHS) and n-hexane were used as modifiers and solvents, respectively, to prepare surface modification of microcrystalline cellulose (MCC). The response surface methodology was used to optimize the effects of reaction conditions on hydrophobicity of MCC. The optimal reaction conditions were determined as follows: the concentration of PMHS was 0.0275% (the mass ratio of PMHS to MCC), the reaction time was 20 min, and the drying temperature was 70 °C. Under the optimum reaction conditions, the water contact angle of modified MCC was 141.5°. It is feasible to optimize and select the reaction conditions of modified MCC by Design-Expert, and the predicted value of the mathematical model is in good agreement with the experimental value. Surface chemical characteristics were investigated using X-ray photoelectron spectroscopy (XPS). These analyses confirmed that the PMHS chains were attached to MCC. Due to the introduction of a large amount of methyl groups, the reaction between MCC and PMHS leads to an improvement in its hydrophobicity.