Extraction and Hydrophobic Modification of Cotton Stalk Bark Fiber
Extraction and Hydrophobic Modification of Cotton Stalk Bark Fiber
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DOI：
10.1155/2016/8769360
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发表时间：
2016-01-01
影响因子：
3.3
通讯作者：
Li, De-Qiang
中科院分区：
文献类型：
--
作者：
Li, Ya-Yu;Du, Guang-Ming;Li, De-Qiang
在碱含量为11%的条件下，对棉秆皮纤维进行高温高压提取。实验结果表明，CSBF的萃取率为27.3wt%，残碱浓度为2.1wt%。然后选用甲基丙烯酸甲酯（MMA）、MMA+引发剂、环氧丙烷、铜乙醇胺和硅烷偶联剂五种改性剂对CSBF进行表面改性。通过保水值的测定，发现这五种改性剂都是有效的，其中硅烷偶联剂的效果最好。得到了硅烷偶联剂的最佳改性条件：改性剂浓度为5%，混合温度为20 ℃，混合时间为1 h，真空干燥时间为1 h。在最佳工艺条件下，改性CSBF的水回收率为89%。这些改性CSBF有望成为木塑复合材料中具有增强作用的填料。
Cotton stalk bark fiber (CSBF) was extracted at high temperature and under high pressure, under the condition of the alkali content of 11 wt%. Experimental results proved that the extraction yield of CSBF was 27.3 wt%, and the residual alkali concentration was 2.1 wt%. Then five kinds of modifiers including methyl methacrylate (MMA), MMA plus initiator, epoxy propane, copper ethanolamine, and silane coupling agent were chosen to modify the surface of CSBF. It was found by measuring water retention value (WRV) that these five kinds of modifiers were all effective and the silane coupling agent was best modifier among all. The optimal modifying conditions of silane coupling agent were obtained: modifier concentration was 5%, the mixing temperature was 20 degrees C, the mixing time was 1 h, and vacuum drying time was 1 h. Under the optimal condition, the WRV of the modified CSBF was 89%. It is expected that these modified CSBF may be a filler with strengthening effect in wood plastic composites (WPC) fields.