We studied the influence of the interface strain and it shows that the lattice mismatch between substrate and film is the main reason of the above observations . expand strain decreases tm - i with increasing resistivity and compressed strain has the opposite effect . using double exchange model of zener these results can be explained qualitatively 27歐姆厘米,轉(zhuǎn)變溫度是78與154開爾文,磁場強(qiáng)度為7t時(shí),磁阻率為習(xí)3及巧6 x結(jié)合雙交換模型和不同的應(yīng)力作用,逐一解釋了產(chǎn)生差異的緣由,其中我們也討論了具有)取向的la 。
It can be concluded that the performance differences between the plate membrane and the hollow fiber membrane can be attribute to difference of the stresses in the membranes when they were under pressure and the difference of the strain caused in the membrane , besides the possible reason that the surface curvature difference between a plate substrate and a hollow fiber one may cause structure difference in the dense functional layer when coating . the stresses in a hollow fiber composite membrane under an outside pressure are quite different from that in a plate one in that they exert on the hollow fiber in both the radial and circular directions , and the compress strain of the hollow fiber is thus much more complex , which may cause the top layer crinkle and a decreased salt rejection 分析認(rèn)為造成平板復(fù)合膜( )和中空纖維復(fù)合膜( )性能差異的主要原因,除了平板基膜與中空纖維基膜因表面曲率不同可能引起在涂覆時(shí)形成的致密功能層結(jié)構(gòu)上的差異之外,由于中空纖維膜受外壓時(shí),膜內(nèi)部承受的應(yīng)力形式與平板膜不同,會同時(shí)在徑向(膜厚度方向)和環(huán)向(膜面內(nèi)方向)兩個(gè)方向產(chǎn)生壓應(yīng)力,因此,所發(fā)生的形變也較為復(fù)雜,可能造成表面復(fù)合層的起皺或脫落,引起脫鹽率下降。