收稿日期: 2017-08-27
网络出版日期: 2018-10-26
基金资助
国家高技术研究发展计划(863计划)资助项目(2015AA033905)
Preparation and properties of PU/HSP composite foams
Received date: 2017-08-27
Online published: 2018-10-26
以聚醚多元醇和多苯基多亚甲基多异氰酸酯(polyaryl polymethylene isocyanate, PAPI)为原料, 汉麻秆芯粉(hemp stem powder, HSP)为改性填料, 水为发泡剂制备了聚氨酯(polyurethane, PU)/HSP复合发泡材料, 研究了HSP的添加量对其75%压缩永久变形、 回弹性等力学性能以及抗菌性的影响, 并探讨了HSP对75%压缩永久变形性能的影响机理. 研究发现, 随着HSP添加量的增加, 在一定的范围内PU/HSP复合发泡材料的回弹性、 拉伸强度和断裂伸长率均有一定程度的增加. 75%压缩永久变形和抗菌性都随HSP添加量的增加而增加. 当HSP的添加量为15 phr时, PU/HSP复合发泡材料的综合性能最优, 密度小于 50 kg/m3, 压陷硬度可达256.1 N, 回弹性接近50%, 75%压缩永久变形小于等于5%, 拉伸强度达到124 kPa.
刘丽, 蒋龙孙, 郝新敏, 陈晓, 黄杰 . PU/HSP复合发泡材料的制备及性能[J]. 上海大学学报(自然科学版), 2018 , 24(5) : 773 -781 . DOI: 10.12066/j.issn.1007-2861.1967
Polyurethane (PU) foam reinforced by free-rising hemp stem powder (HSP) is prepared with polyols and polyaryl polymethylene isocyanate (PAPI). Water is used as a blowing agent. Effects of the HSP on the physical properties and bacteria inhibitive rate are studied. The results shows that rebound resilience, tensile strength and elongation at break increase with the increasing HSP content within a certain range. The 75% compression set and bacteria inhibitive increase with the HSP content. The composite foams with 15 phr HSP shows the optimum overall properties with density and the 75% compression set are less than 50 kg/m3 and 5%, respectively. Hardness and tensile strength reach 256.1 N and 124 kPa, and rebound resilience around 50%.
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