Ọrụ na ụkpụrụ nke njide mmiri nke hydroxypropyl methylcellulose HPMC

Hydroxypropyl methylcellulose (HPMC) bụ ether cellulose na-abụghị ionic nke sitere na cellulose polymer eke sitere na usoro kemịkalụ. Ha bụ ntụ ntụ ọcha na-enweghị isi, nke na-enweghị ụtọ na nke na-adịghị egbu egbu nke na-adaba n'ime ngwọta colloidal doro anya ma ọ bụ ntakịrị urukpuru na mmiri oyi. Ọ nwere ndim, njide, na-achụsasị, emulsifying, film-akpụ, suspending, adsorbing, gelling, elu-arụ ọrụ, mmiri na-ejigide na-echebe colloid Njirimara. Enwere ike iji Hydroxypropyl methylcellulose na methylcellulose na ihe owuwu ụlọ, ụlọ ọrụ agba, resin sịntetik, ụlọ ọrụ seramiiki, ọgwụ, nri, textiles, ọrụ ugbo, kemịkalụ kwa ụbọchị na ụlọ ọrụ ndị ọzọ.

Hydroxypropyl methylcellulose HPMC nhazi kemịkalụ:
[C6H7O2(OH)3-mn(OCH3)m(OCH2CH(OH)CH3)n]x

Mmetụta njide mmiri na ụkpụrụ nke hydroxypropyl methylcellulose HPMC:
Cellulose ether HPMCtumadi na-arụ ọrụ nke njide mmiri na ndim n'ime ngwa simenti na slurry dabeere na gypsum, ma nwee ike imeziwanye ike na-ejikọta ọnụ na nguzogide sag nke slurry.

Ihe ndị dị ka okpomọkụ ikuku, okpomọkụ na ọsọ ọsọ ikuku ga-emetụta ọnụ ọgụgụ mmiri na-agbanwe agbanwe na ciment mortar na ngwaahịa gypsum. Ya mere, n'oge dị iche iche, e nwere ụfọdụ ọdịiche dị na mmiri na-ejigide mmetụta nke ngwaahịa na otu ego nke HPMC gbakwunyere. N'ime ihe owuwu a kapịrị ọnụ, enwere ike idozi mmetụta njide mmiri nke slurry site na ịba ụba ma ọ bụ ibelata ego nke HPMC agbakwunyere. Njide mmiri nke methyl cellulose ether n'okpuru ọnọdụ okpomọkụ dị elu bụ ihe dị mkpa na-egosi ọdịiche dị mma nke methyl cellulose ether. Ngwaahịa usoro HPMC mara mma nwere ike dozie nsogbu nke njigide mmiri n'okpuru oke okpomọkụ. N'oge okpomọkụ dị elu, karịsịa n'ebe ndị na-ekpo ọkụ ma na-ekpo ọkụ na ebe a na-emepụta ihe na-egbuke egbuke n'akụkụ anwụ na-acha, a chọrọ HPMC dị elu iji meziwanye njide mmiri nke slurry. HPMC dị elu nwere otu ezigbo mma. A na-ekesa otu methoxyl na hydroxypropoxyl ya n'otu n'otu n'akụkụ eriri mkpụrụ ndụ cellulose, nke nwere ike imeziwanye ikike ikuku oxygen na hydroxyl na ether bond iji jikọta na mmiri iji mepụta njikọ hydrogen. , nke mere na mmiri n'efu na-aghọ mmiri a na-ekekọta, ka o wee nwee ike ịchịkwa evaporation nke mmiri na-akpata site na ihu igwe dị elu, ma nweta nnukwu njigide mmiri.

High-edu cellulose HPMC nwere ike uniformly na n'ụzọ dị irè chụsasịrị na ciment ngwa agha na gypsum dabeere na ngwaahịa, na kechie niile siri ike ahụ, na-etolite a wetting film, mmiri na isi na-eji nwayọọ nwayọọ tọhapụrụ ruo ogologo oge, na inorganic gluu The. mmeghachi omume hydration nke ihe ejikọtara ọnụ ga-eme ka ike njikọ na ike mkpakọ nke ihe ahụ. Ya mere, n'ime ụlọ okpomọkụ nke okpomọkụ dị elu, iji nweta mmetụta njigide mmiri, ọ dị mkpa ịgbakwunye ngwaahịa HPMC dị elu na oke zuru ezu dịka usoro ahụ si dị, ma ọ bụghị ya, a ga-enwe hydration na-ezughị ezu, ike belata, mgbawa, oghere. na mwụfu kpatara oke ihicha. nsogbu, ma na-abawanye ihe isi ike nke ndị ọrụ. Ka okpomọkụ na-adaba, a ga-eji nwayọọ nwayọọ belata oke mmiri HPMC agbakwunyere, enwere ike nweta otu mmetụta njide mmiri.

Ihe ndị a na-emetụtakarị njide mmiri nke hydroxypropyl methylcellulose HPMC ngwaahịa n'onwe ya:

1. Uniformity nke cellulose ether HPMC
A na-ekesa HPMC na-emeghachi omume nke ọma, metoxyl na hydroxypropoxyl, yana ọnụ ọgụgụ njide mmiri dị elu.

2. Cellulose ether HPMC thermal gel okpomọkụ
Ihe dị elu na-ekpo ọkụ gel na-ekpo ọkụ, nke dị elu nke njide mmiri; ma ọ bụghị ya, na-ebelata ọnụ ọgụgụ njide mmiri.

3. Cellulose Ether HPMC viscosity
Mgbe viscosity nke HPMC na-abawanye, njigide mmiri na-abawanye; mgbe viscosity ruru ọkwa ụfọdụ, mmụba nke njide mmiri na-eme ka ọ dị nro.

4. Mgbakwunye ego nke cellulose ether HPMC
Ọnụ ọgụgụ dị ukwuu nke cellulose ether HPMC gbakwunyere, ọnụ ọgụgụ dị elu nke njide mmiri na-eme ka mmetụta njide mmiri dịkwuo mma. N'ihe dị iche iche nke 0.25-0.6% mgbakwunye, ọnụ ọgụgụ njide mmiri na-abawanye ngwa ngwa na mmụba nke mgbakwunye ego; mgbe ego mgbakwunye na-abawanye, mmụba na-emekarị nke njide mmiri na-ebelata.