Ko te ingoa Hainamana o te HPMC ko te hydroxypropyl methylcellulose. Kāore i te ionic, ā, he maha ngā wā ka whakamahia hei pupuri wai i roto i te moata maroke-ranu. Koinei te rauemi pupuri wai e whakamahia whānuitia ana i roto i te moata.
Ko te tukanga whakaputa o te HPMC he hua etera kei roto i te polysaccharide i hangaia mā te alkalizing me te etherification o te muka miro (ā-whare). Kāore he utu, kāore e tauhohe ki ngā iona utu i roto i te rauemi whakapūkara, ā, he pumau te mahi. He iti ake te utu i ētahi atu momo etera cellulose, nō reira he whānuitia te whakamahinga i roto i te moata maroke-ranu.
Te Mahi a te hydroxypropyl methylcellulose: Ka taea e ia te whakamātotoru i te moata hou kua whakaranua kia rite te matotoru mākū, ā, kia kore ai e wehewehe. (Te whakamātotoru) Ko te pupuri wai te āhuatanga tino nui, e āwhina ana ki te pupuri i te nui o te wai kore utu i roto i te moata, kia roa ake ai te wā o te rauemi sima ki te whakamakuku i muri i te hanganga o te moata. (Te pupuri wai) He āhuatanga ka taea te whakauru i te hau, ka taea te whakauru i ngā mirumiru hau ōrite me te pai hei whakapai ake i te hanganga o te moata.
Ko te teitei ake o te matotoru o te hydroxypropyl methylcellulose ether, ko te pai ake o te mahi pupuri wai. Ko te matotoru he tawhā nui o te mahi HPMC. I tēnei wā, he rerekē ngā tikanga me ngā taputapu e whakamahia ana e ngā kaihanga HPMC rerekē hei ine i te matotoru o te HPMC. Ko ngā tikanga matua ko HaakeRotovisko, Hoppler, Ubbelohde me Brookfield.
Mō te hua kotahi, he tino rerekē ngā hua matotoru i inehia mā ngā tikanga rerekē, ā, he ruarua ngā rerekētanga o ētahi. Nō reira, ina whakatauritehia te matotoru, me whakahaere i waenga i ngā tikanga whakamātautau kotahi, tae atu ki te pāmahana, te rotor, me ētahi atu. Mō te rahi o te matūriki, ko te angiangi o te matūriki, ko te pai ake o te pupuri wai. I muri i te pa o ngā matūriki nui o te cellulose ether ki te wai, ka rewa tonu te mata ka hanga he kirikiri hei takai i te rauemi hei ārai i ngā ngota wai kei uru tonu. I ētahi wā, kāore e taea te marara noa me te rewa ahakoa te roa o te whakaoho, ka hanga he wairewa kapua, he ranunga rānei. He nui te pānga ki te pupuri wai o te cellulose ether, ā, ko te wairewatanga tētahi o ngā āhuatanga mō te whiriwhiri i te cellulose ether.
Ko te pai o te āhua he tohu mahi nui anō hoki mō te methyl cellulose ether. Ko te MC e whakamahia ana mō te moata paura maroke me paura, he iti te wai, ā, ko te pai o te āhua me iti iho i te 63um te 20%~60% o te rahi o te matūriki. Ka pā te pai o te āhua ki te wairewatanga o te hydroxypropyl methylcellulose ether. Ko te MC matotoru he kirikiri te nuinga o te wā, ā, he ngāwari ki te wairewa ki te wai me te kore e whakaemi, engari he tino puhoi te tere wairewatanga, nō reira kāore e pai mō te whakamahi i roto i te moata paura maroke.
I roto i te moata paura maroke, ka marara te MC i waenga i ngā rauemi sima pēnei i te kirikiri, te whakakī pai me te sima, ā, ko te paura pai anake ka taea te karo i te whakakotahitanga o te methyl cellulose ether ina whakaranua ki te wai. Ina tāpirihia te MC ki te wai hei whakarewa i ngā kirikiri, he tino uaua ki te marara me te whakarewa. Ehara i te mea he maumau noa te pai o te MC, engari ka whakaitihia hoki te kaha ā-rohe o te moata. Ina whakamahia tētahi moata paura maroke pēnei ki tētahi wāhi nui, ka tino heke te tere o te whakamaroke o te moata paura maroke ā-rohe, ā, ka puta ngā kapiti nā ngā wā whakamaroke rerekē. Mō te moata rehu me te hanganga miihini, he nui ake te hiahia mō te pai nā te poto o te wā whakaranu. I te nuinga o te wā, ko te teitei ake o te matotoru, ko te pai ake o te pānga pupuri wai. Heoi, ko te teitei ake o te matotoru me te teitei ake o te taumaha ngota o te MC, ko te hekenga rite o tōna wairewa ka pā kino ki te kaha me te mahi hanga o te moata.
Ka nui ake te matotoru, ka kitea te pānga matotoru ki te moata, engari kāore i te ōrite tika. Ka nui ake te matotoru, ka nui ake te matotoru o te moata mākū, arā, i te wā hanga, ka kitea he piri ki te waru me te piri nui ki te papa. Engari kāore e whai hua ki te whakanui ake i te kaha hanganga o te moata mākū tonu. Arā, i te wā hanga, kāore e kitea te mahi ārai-totoka. Engari, ko ētahi matotoru reo me te iti engari he methyl cellulose ethers kua whakarerekētia he mahi tino pai ki te whakapai ake i te kaha hanganga o te moata mākū.
E pā ana hoki te pupuri wai o te HPMC ki te pāmahana e whakamahia ana, ā, ka heke te pupuri wai o te methyl cellulose ether i te pikinga o te pāmahana. Heoi, i roto i ngā tono rauemi tūturu, he maha ngā wā ka whakamahia te moata paura maroke ki ngā papa wera i ngā pāmahana teitei (neke atu i te 40 nekehanga) i roto i ngā taiao maha, pērā i te paninga putty pakitara o waho i raro i te rā i te raumati, ka tere ake te whakamaroke o te sima me te whakapakeke o te moata paura maroke. Ko te hekenga o te tere pupuri wai ka puta te whakaaro e pāngia ana te kaha mahi me te ātete pakaru, ā, he mea tino nui kia whakaitihia te awe o ngā āhuatanga pāmahana i raro i tēnei āhuatanga.
I tēnei whakaaro, ko ngā tāpiringa methyl hydroxyethyl cellulose ether e kiia ana i tēnei wā kei te ara mua o te whanaketanga hangarau. Ahakoa kua whakanuia te nui o te methyl hydroxyethyl cellulose (tātai raumati), kāore tonu te kaha mahi me te ātete pakaru e tutuki ai ngā hiahia o te whakamahinga. Mā te whakamahi i ētahi maimoatanga motuhake ki te MC, pērā i te whakanui ake i te taumata o te etherification, me ētahi atu, ka taea te pupuri i te pānga pupuri wai i te pāmahana teitei ake, kia pai ake ai te mahi i raro i ngā āhuatanga uaua.
Kaua e tino nui te horopeta o te HPMC, ki te kore ka nui ake te wai e hiahiatia ana mō te moata, ka piri ki te kokoru, ā, ka roa rawa te wā whakatakoto, ka pā ki te hanganga. Ka whakamahia e ngā momo moata rerekē te HPMC me ngā matotoru rerekē, ā, kaua e whakamahia noa te HPMC matotoru teitei. Nō reira, ahakoa he pai ngā hua hydroxypropyl methylcellulose, ka mihia rātou ina whakamahia pai. Ko te whiriwhiri i te HPMC tika te kawenga matua a ngā kaimahi taiwhanga umanga. I tēnei wā, he maha ngā kaihokohoko nanakia e hanga ana i te HPMC, ā, he tino ngoikore te kounga. I te wā e whiriwhiri ana i tētahi cellulose, me mahi pai te taiwhanga i roto i te whakamātautau kia mau tonu ai te hua moata, kaua hoki e apo ki te utu iti, e puta ai he mate koretake.
Wā tuku: Mei-04-2023