I te whakamahinga ohydroxypropyl methyl cellulose HPMC, e kitea ana e tātou e rua ngā momo matua: te memeha tonu me te memeha puhoi. Kia mārama tātou ki te rerekētanga i waenga i te memeha tere me te memeha puhoi o te hydroxypropyl methyl cellulose.
Ko te HPMC inamata e pā ana ki te whakamahinga o te kaihoko honohono-whiti mō te maimoatanga mata i roto i te tukanga whakaputa, kia tere ai te whakamarara o te HPMC ki te wai matao, engari ehara i te otinga tūturu, mā te whakaoho ōrite, ka piki haere te matotoru, arā, te whakarewanga;
Ka taea hoki te kī ko te HPMC puhoi wairewa he hua rewa wera. Ina tūtaki ki te wai matao, ka taea te whakamarara tere ki roto i te wai wera. Mā te whakaoho ōrite, ka heke te pāmahana o te otinga ki tētahi pāmahana kua whakaritea. (Ko te pāmahana o tā mātou tiēre he tata ki te 60°C), ka puta mārire te matotoru kia puta rā anō he tiēre mārama, piri hoki.
Anei te rerekētanga i waenga i te otinga tere me te otinga puhoi. Mena he pātai āu mō tēnei mōhiotanga, ka taea hoki e koe te whakapā mai ki a mātou.
Hydroxypropyl methyl celluloseHPMCte whakaroa i te whakamakuku o te sima
Mā te tāpiri i te hydroxypropyl methyl cellulose ki te sima ka whakaroa i tōna makuku. Nā, he aha tāu e mōhio ana mō tana mahi? Me titiro tātou ki te hydroxypropyl methyl cellulose hei whakaroa i te makuku o te sima. Te mātāpono.
1. Te whakapae mō te mate nekehanga katote
I whakapae mātou ka whakanui ake te hydroxypropyl methyl cellulose i te matotoru o ngā wairewa pore, ka aukati i te tere o te nekehanga ionic, ka whakaroa hoki i te makuku o te sima. Heoi, ko ngā cellulose ethers matotoru iti i roto i tēnei whakamātautau he kaha ake te kaha ki te whakaroa i te makuku o te sima. Nō reira, kāore i te tika tēnei whakaaro. E ruarua ana hoki a Pourchez me ētahi atu ki tēnei whakapae. Inaa, he poto rawa te wā o te hekenga o te ion, te nekehanga rānei, ā, te āhua nei kāore i te rerekē ki te whakaroa o te makuku o te sima.
2. Te pirau kawakore
Ka tere te pirau o ngā polysaccharides i raro i ngā āhuatanga kawakore hei whakaputa i ngā waikawa hydroxyl carboxylic e whakaroa ana i te whakamakuku o te sima. Nō reira, ko te whakaroa o te whakamakuku o te hydroxypropyl methyl cellulose pea nā tōna pirau i roto i ngā paru sima kawakore hei hanga i ngā waikawa hydroxycarboxylic. Heoi, i kitea e Pourchez me ētahi atu he tino pumau ngā cellulose ethers i raro i ngā āhuatanga kawakore, he iti noa te pirau, ā, he iti noa te pānga o ngā hua pirau ki te whakaroa o te whakamakuku o te sima.
3, te mimiti
Ka taea te mimiti i te hydroxypropyl methyl cellulose poraka sima whakamakuku. Ko te take tūturu he maha ngā tāpiringa rauropi ka mimiti ki ngā matūriki sima me ngā hua whakamakuku, ka ārai i te whakarewanga o ngā matūriki sima me te tioata o ngā hua whakamakuku, kia roa ai te whakamakuku me te whakatōtō o te sima. I kitea e Pourchez me ētahi atu he ngāwari te mimiti o ngā etera cellulose ki ngā mata o ngā hua whakamakuku pērā i te konupūmā hauwai, te CSH gel me te konupūmā aluminate hydrate, engari kāore e ngāwari te mimiti e te ettringite me ngā wāhanga kāore i whakamakuku. I tua atu, i roto i te take o te etera cellulose, he kaha ake te kaha mimiti o te HEC i te pupuhi MC. Ko te iti iho o te ihirangi o te hydroxyethyl i roto i te HEC, te hydroxypropyl rānei i roto iHPMC, ka kaha ake te kaha mimiti: mō ngā hua whakamakuku, he kaha ake te kaha mimiti o te konupūmā hauwai i tō te CSH. E whakaatu ana hoki ngā tātaritanga anō he hononga te kaha mimiti o ngā hua whakamakuku me te cellulose ether ki te whakaroa o te whakamakuku sima: ka kaha ake te mimiti, ka kitea te whakaroa, engari he ngoikore te mimiti ettringite o te cellulose ether, engari he tino whakaroa tēnei. He kaha te mimiti o te cellulose ether o te tricalcium silicate me ōna hua whakamakuku, he mārama te whakaroa i te tukanga whakamakuku o te wāhanga silicate, he tino iti te nui o te mimiti o te ettringite, engari he mārama te whakaroa o te hanganga ettringite, nā te mea ka pāngia te whakaroa o te hanganga ettringite e te toenga Ca2+ i roto i te otinga, he toronga tēnei o te cellulose ether. I haere tonu te whakamakuku silicate mutunga.
Koinei ngā mātāpono whakaroa waikura o te hydroxypropyl methyl cellulose. Ko te tumanako mā tēnei mōhiotanga ka taea e te katoa te mārama ki te mahi a te hua, ā, ka pai ake hoki te whakamahi.
Wā tuku: Paenga-whāwhā-26-2024