论文代写：化学
聚酰亚胺/二氧化硅-二氧化钛(PI/ SiO2-TiO2)被发现是一种重要的混合膜组分，用于原位溶胶-凝胶过程。PI前体聚(酰胺酸)(PAA)是发现含有2,2’双[4 -(4-aminophenoxy)苯基]丙烷(p-BAPPP),3、3 ‘,4,4’- benzophenetetracarboxylic酐(BTDA)和3-aminopropyltrimethoxysilane(APrTMOS)化合物。对这种复合苯三甲氧基硅烷的制备方法是制备PI/ SiO2-TiO2薄膜。研究发现，与其他的散粒化合物相比，杂化剂表面的硅含量更集中。同时也发现了Ti的分布情况。分析了Si O Si、Si O Ti和Ti O Ti的三维结构。结果发现，与纯PI相比，PTMS薄膜具有更好的功能和功能接触角。这是因为非极性片段，如C2H6或苯组。此外，由于交联结构的形成，还发现了混合动力系统表面的一些亲水段。研究发现，密度较大的交联分子结构中CTE浓度较低，Tg浓度较高。通过对该化合物的比较，发现了金属氧化物的组成及其与PI混合的功能。这显示了混合元件在工业生产中的内在潜力。
论文代写：化学
Polyimide/silica–titania (PI/SiO2–TiO2) is found to be an important hybrid film component that is used in the in situ sol–gel process. The PI precursor are poly (amic acid) (PAA) is found to contain 2, 2’-bis [4-(4-aminophenoxy)-phenyl] propane (p-BAPPP), 3, 3’, 4, 4’- benzophenetetracarboxylic anhydride (BTDA) and 3-aminopropyltrimethoxysilane (APrTMOS) compounds. To this compound phenyltrimethoxysilane was added to fabricate PI/SiO2–TiO2 film. It was found that the amount of Silicon on the surface of the hybrid was more in concentration when compared to the other bulk compounds. The distribution of the Ti was also found to hybrid films. The 3-D structures of Si O Si, Si O Ti, and Ti O Ti were analyzed. It was found that the films with PTMS had better functionality and functional contact angles than the pure PI. This is because of the nonpolar segments, such as C2H6 or benzene groups. On addition of Ti (OEt) 4, some of the hydrophilic segments on the surface of the hybrids were found to be induced owing to the formation of crosslinked structure. It was found that the denser crosslinked molecular structure had a lower concentration of the CTE and higher concentration of Tg. On comparison of the compound it was found that the composition of the metal oxide and its functionality improved with the PI hybrid. This shows the innate potential of the hybrid components in the industrial production of the materials.