Hydroxypropyl Methylcellulose (HPMC) bụ polymer a na-eji soluble mmiri eme ihe n'ọtụtụ ebe n'ime ihe owuwu ụlọ, ọkachasị nrapado tile dabere na ciment. Ngwongwo kemịkalụ pụrụ iche na ihe anụ ahụ nke HPMC na-eme ka ọ rụọ ọrụ dị mkpa n'ịkwalite nrapado, ịrụ ọrụ ihe owuwu, na ịdịte aka nke nrapado tile.
(1) Ihe omuma ihe omuma nke HPMC
1. Chemical Ọdịdị nke HPMC
HPMC bụ ihe mgbapụta cellulose nwetara site n'ịgbanwe cellulose eke ekemịkal. Ihe owuwu ya bụ methoxy (-OCH₃) na hydroxypropoxy (-CH₂CHOHCH₃) na-edochi ụfọdụ otu hydroxyl na agbụ cellulose. Usoro a na-enye HPMC ezigbo solubility na ike hydration.
2. Njirimara anụ ahụ nke HPMC
Solubility: HPMC nwere ike igbari na mmiri oyi na-etolite a transperent colloidal ngwọta na nwere ezi hydration na ndim ike.
Thermogelation: Ihe ngwọta HPMC ga-etolite jel mgbe ọ dị ọkụ ma laghachi na ọnọdụ mmiri mmiri mgbe ọ jụrụ.
Ọrụ dị n'elu: HPMC nwere ọrụ elu dị mma na ngwọta, nke na-enyere aka ịmepụta usoro afụ siri ike.
Ngwongwo anụ ahụ na kemịkalụ ndị a pụrụ iche na-eme HPMC ka ọ bụrụ ihe dị mma maka ịmegharị nrapado tile dabere na ciment.
(2) Usoro nke HPMC na-eme ka arụ ọrụ nke nrapado tile dabere na ciment
1. Meziwanye njigide mmiri
Ụkpụrụ: HPMC na-etolite usoro netwọk viscous na ngwọta, nke nwere ike igbachi mmiri nke ọma. Ikike njide mmiri a bụ n'ihi ọnụ ọgụgụ dị ukwuu nke hydrophilic (dị ka otu hydroxyl) na ụmụ irighiri ihe HPMC, nke nwere ike ịmịnye ma jide nnukwu mmiri mmiri.
Meziwanye nrapado: Ngwunye taịlị nke simenti na-achọ mmiri iji sonye na mmeghachi omume hydration n'oge usoro ike. HPMC na-ejigide ọnụnọ nke mmiri, na-ekwe ka ciment na-eme ka mmiri dị ọcha zuru oke, si otú a na-eme ka adhesion nke nrapado dịkwuo mma.
Gbatịkwuo oge: Njide mmiri na-egbochi nrapado ịsa ngwa ngwa n'oge a na-ewu ụlọ, na-agbatị oge mgbanwe maka ịtọgbọ tile.
2. Melite arụmọrụ ihe owuwu
Ụkpụrụ: HPMC nwere mmetụta dị mma nke ukwuu, na ụmụ irighiri ya nwere ike ịmepụta usoro dịka netwọk na ngwọta mmiri, si otú ahụ na-abawanye viscosity nke ngwọta.
Meziwanye ihe na-egbochi sagging: slurry na-agba agba nwere ihe mgbochi ka mma n'oge a na-ewu ihe, nke mere na taịlị ahụ nwere ike ịnọsi ike n'ọnọdụ a kara aka n'oge a na-emepe emepe ma ghara ịdaba n'ihi ike ndọda.
Mee ka mmiri dịkwuo mma: viscosity kwesịrị ekwesị na-eme ka nrapado dị mfe itinye ma gbasaa n'oge a na-ewu ụlọ, ma n'otu oge ahụ na-arụ ọrụ nke ọma, na-ebelata ihe isi ike nke ihe owuwu.
3. Mee ka ogologo oge dịkwuo elu
Ụkpụrụ: HPMC na-eme ka njide mmiri na nchikota nke nrapado na-eme ka ọ dịkwuo mma, si otú ahụ na-eme ka ọ dịgidere nhịahụ nke simenti dabeere na nrapado.
Melite ike njikọta: Mkpụrụ ciment nwere mmiri mmiri zuru oke na-enye nrapado siri ike ma ọ naghị adị mfe ịdapụ ma ọ bụ ịgbawa n'oge eji ogologo oge.
Mee ka mgbape mgbape dịkwuo mma: Njide mmiri dị mma na-ezere nnukwu mbelata nke nrapado n'oge usoro ihicha, si otú a na-ebelata nsogbu mgbawa nke mbelata na-akpata.
(3) Nkwado data nnwale
1. Nnwale njide mmiri
Nnyocha e mere egosiwo na ọnụ ọgụgụ njide mmiri nke nrapado tile dabeere na ciment na mgbakwunye nke HPMC na-eme ka ọ dịkwuo mma. Dịka ọmụmaatụ, ịgbakwụnye 0.2% HPMC na nrapado nwere ike ịbawanye ọnụego njide mmiri site na 70% ruo 95%. Ọganihu a dị oke mkpa iji melite ike njikọta na ịdịte aka nke nrapado.
2. Nnwale viscosity
Ọnụ ego nke HPMC agbakwunyere nwere mmetụta dị ukwuu na viscosity. Ịtinye 0.3% HPMC na nrapado tile dabeere na ciment nwere ike ime ka viscosity dịkwuo ọtụtụ ugboro, hụ na nrapado nwere ezigbo ọrụ mgbochi na-arụ ọrụ.
3. Bond ike ule
Site na nnwale atụnyere, achọpụtara na ike njikọ dị n'etiti taịlị na ihe nrapado nwere HPMC dị mma karịa nke adhesives na-enweghị HPMC. Dịka ọmụmaatụ, mgbe ịgbakwunye 0.5% HPMC, ike njikọ nwere ike ịbawanye site na 30%.
(4) Ihe atụ ngwa
1. Idobe taịlị ala na taịlị mgbidi
N'ebe a na-edobe taịlị ala na taịlị mgbidi, ihe mkpuchi taịlị sitere na ciment kwalitere HPMC gosipụtara arụmọrụ ụlọ ka mma yana njikọ na-adịgide adịgide. N'oge a na-ewu ihe owuwu, nrapado adịghị mfe ịhapụ mmiri ngwa ngwa, na-eme ka ọ dị mma nke ihe owuwu na nke dị larịị nke taịl nile.
2. Usoro mkpuchi mgbidi mpụga
A na-ejikwa nrapado emelitere HPMC n'ọtụtụ ebe na sistemụ mkpuchi mgbidi mpụga. Njide mmiri ya magburu onwe ya na adhesion na-eme ka njikọ siri ike dị n'etiti osisi mkpuchi na mgbidi ahụ, si otú a na-eme ka ọ dịkwuo ogologo na nkwụsi ike nke usoro mkpuchi mgbidi dị n'èzí.
Ngwa nke HPMC na nrapado tile dabere na ciment na-eme ka arụmọrụ nke nrapado dịkwuo mma. Site n'ịkwalite njide mmiri, ịkwalite ịrụ ọrụ ihe owuwu na imeziwanye ịdịte aka, HPMC na-eme ka adhesives tile dabeere ciment dabara adaba maka mkpa owuwu ọgbara ọhụrụ. Site na mmepe nke teknụzụ yana mmụba na-achọ ihe ụlọ na-arụ ọrụ dị elu, atụmanya ngwa nke HPMC ga-abawanye.
Oge nzipu: Jun-26-2024