刘惠,沈丹丹,陈艳萍,苟进胜.木质素/PVA发泡材料的制备及性能表征[J].包装工程,2017,38(19):74-81.
LIU Hui,SHEN Dan-dan,CHEN Yan-ping,GOU Jin-sheng.Preparation and Properties Characterization of Lignin/PVA Foam Materials[J].Packaging Engineering,2017,38(19):74-81. |
| 木质素/PVA发泡材料的制备及性能表征 |
| Preparation and Properties Characterization of Lignin/PVA Foam Materials |
| 投稿时间：2017-06-04 修订日期：2017-10-10 |
| DOI： |
| 中文关键词: 木质素 PVA 发泡材料 可降解材料 |
| 英文关键词: lignin PVA foam materials degradable materials |
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| 中文摘要: |
| 目的 探究木质素/PVA发泡材料的制备工艺及性能优化。方法 采用控制单一变量和正交试验法对木质素、PVA溶液质量分数、甲醛、硫酸的制备工艺进行探索及优化。结果 单因素试验结果显示，木质素/PVA发泡材料的最佳工艺水平，PVA溶液的质量分数为9%，木质素用量为30%（文中所提用量均表示相对于PVA的质量，下同），甲醛用量为24%，硫酸用量为39%。正交试验结果显示，发泡材料的制备工艺最优组合，PVA溶液的质量分数为9%，木质素用量为20%，甲醛用量为40%，硫酸用量为47%。FTIR结果显示，木质素与PVA在适宜的条件下发生缩醛交联反应生成木质素/PVA发泡材料，但反应程度低，以在木质素苯环5位发生的取代反应为主。SEM显示，在不考虑各因素的相互影响下，各单因素木质素用量为30%，PVA溶液的质量分数为9%，甲醛用量为24%，硫酸用量为47%时所制备的发泡材料形成了较规则、均匀分布的泡孔或数目较多的孔隙结构。结论 各单因素用量对木质素/PVA发泡材料的性能有很大影响，4个因素对发泡材料性能影响的主次排序为木质素用量>PVA溶液的质量分数>硫酸用量>甲醛用量。 |
| 英文摘要: |
| The work aims to study the preparation process and performance optimization of lignin/PVA foam materials. The preparation process of lignin, PVA solution mass fraction, formaldehyde and sulfuric acid were explored and optimized by the control of single variable and orthogonal experiment. The single-factor experiment results showed the technological level of lignin/PVA foam materials is optimal when the mass fraction of PVA solution was 9%, the amount of lignin was 30% (the amount proposed herein indicated the mass relative to PVA, the same below), and the amount of formaldehyde and sulfuric acid was respectively 24% and 39%. The orthogonal test results showed the preparation process of lignin/PVA foam materials was the optimal combination when the mass fraction of PVA solution was 9%, the amount of lignin was 20%, and the amount of formaldehyde and sulfuric acid was respectively 40% and 47%. According to the FTIR results, lignin and PVA underwent acetal crosslinking reaction and produced lignin /PVA foam material under the appropriate conditions, but the reaction rate was low, and the substitution reaction mainly occurred at the 5th lignin benzene ring. SEM showed that, when the amount of the single-factor lignin was 30%, the mass fraction of PVA solution was 9%, the amount of formaldehyde was 24% and the amount of sulfuric acid was 47%, without considering the influence of each factor, the prepared foam material formed regular, evenly distributed pores or a large number of pore structures. In conclusion, each single factor has a great influence on the performance of the lignin/PVA foam materials. The order of priority regarding the influence of the four factors on the performance of the foam materials was: the amount of lignin>the mass fraction of PVA solution> the amount of sulfuric acid>the amount of formaldehyde. |
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