公开(公告)号：US20150005407A1

公开(公告)日：2015-01-01

申请号：US13931951

申请日：2013-06-30

Applicant: King Abdulzaiz City for Science and Technology

Inventor： AHMED ALI BASFAR ,  Salah Lotfy Ahmed

IPC: C08J3/24 ,  C08J3/28

CPC classification number: C08J3/246 ,  B29C61/003 ,  C08J3/24 ,  C08J3/28 ,  C08J2329/04 ,  C08J2435/02 ,  C08K3/041 ,  C08K5/07 ,  C08K7/24 ,  C08L29/04 ,  C08L33/14 ,  C08L2201/12

Abstract: Shape memory polymers (SMP) based on poly vinyl alcohol (PVA) in the presence of 2-carboxyethyl acrylate oligomers (CEA), multi-wall carbon nanotubes (MWCNTs) and cross linked by ionizing radiation were investigated. Chemical crosslinking by glutaraldehyde for PVA in the presence of CEA and MWCNTs was also studied. Radiation cross linked SMP exhibits good temperature responsive shape memory behavior as demonstrated by thermal properties of radiation investigated by dynamic mechanical analysis. Transition temperature at Tan δ of radiation cross linked SMP decreased significantly by 6 and 13° C. due to addition of MWCNTs. The developed SMP exhibited promising shape memory behavior of radiation cross linked SMP for biomedical applications between temperatures range of Tan δ. Results on the gel fraction revealed significant reduction in swelling and increase in gelation due to chemical cross linking with glutaraldehyde. The radiation cross linked SMP reached 100% gelation at an irradiation dose of 50 kGy.

Abstract translation: 研究了在2-羧乙基丙烯酸酯低聚物（CEA），多壁碳纳米管（MWCNTs）存在下，通过电离辐射交联的基于聚乙烯醇（PVA）的形状记忆聚合物（SMP）。 还研究了在CEA和MWCNT存在下戊二醛对PVA的化学交联。 辐射交联的SMP表现出良好的温度响应形状记忆行为，如通过动态机械分析研究的辐射的热性质所证明的。 由于加入MWCNT，辐射交联的SMP的Tanδ的转变温度显着降低了6和13℃。 开发的SMP在Tanδ的温度范围之间呈现出用于生物医学应用的辐射交联SMP的有希望的形状记忆行为。 由于与戊二醛的化学交联，凝胶分数的结果显示肿胀显着减少和凝胶化增加。 辐射交联的SMP在50kGy的照射剂量下达到100％凝胶化。