Ko ngā cellulose ether he pūmua hangai i hangaia mai i te cellulose tūturu, ā, kua whakarerekētia mā te matū. Ko te cellulose ether he mea hanga mai i te cellulose tūturu. Kāore i rite ki ngā pūmua hangai, ko te hanga cellulose ether e ahu mai ana i te cellulose, te rauemi tino taketake, he pūhui pūmua tūturu. Nā te motuhaketanga o te hanganga cellulose tūturu, kāore te cellulose tonu e kaha ki te tauhohe ki ngā kaihoko etherizing. Heoi, i muri i te maimoatanga o ngā wairewa, ka whakangaromia ngā here hauwai kaha i waenganui me roto i ngā mekameka ngota, ā, ka tukuna te mahi rōpū hydroxyl ki roto i te cellulose alkali me te kaha ki te tauhohe, ā, i muri i te tauhohenga o te kaihoko etherizing ka hurihia he rōpū OH ki te rōpū OR hei whiwhi i te cellulose ether.
He mārama te pānga o ngā etera cellulose ki te kukume i te hau ki ngā rauemi sima hou kua whakaranua. He rōpū hydrophilic (hydroxyl, ether) me hydrophobic (methyl, glucose ring) ngā etera cellulose, ā, he surfactants he mahi mata, nō reira he pānga kukume hau. Mā te pānga kukume hau o te etera cellulose ka puta te pānga "pōro", ka taea te whakapai ake i te mahi a te rauemi hou, pērā i te whakanui ake i te kirihou me te maeneene o te moata i te wā e mahi ana, he mea whai hua ki te horapa o te moata; ka whakapai ake hoki i te hua o te moata me te whakaiti i te utu o te hanga moata; heoi, ka whakanui ake i te porosity o te rauemi kua whakapakeketia me te whakaiti i tōna kaha me te modulus elasticity, me ētahi atu. Ngā āhuatanga miihini.
Hei matū horoi, he pānga whakamakuku, he pānga whakahinuhinu rānei tō te cellulose ether ki ngā matūriki sima, e whakanui ana i te rere o ngā rauemi sima me tōna pānga kukume-hau, engari ka whakaitihia te rere o te pānga matotoru, ā, ko te pānga o te cellulose ether ki te rere o ngā rauemi sima he huinga o ngā pānga whakakirihou me te whakakirihou. I te nuinga o te wā, ina iti rawa te nui o te cellulose ether, ka kitea te pānga o te whakakirihou, te whakaiti wai rānei; ina nui te nui, ka tere te piki o te pānga whakakirihou o te cellulose ether, ā, ka mākū tōna pānga kukume-hau, nō reira ka kitea te pānga whakakirihou, te whakanui rānei i te hiahia wai.
Wā tuku: 24 Paenga-whāwhā 2022