Nsogbu nke mbelata viscosity n'oge nchekwa agba bụ nsogbu a na-ahụkarị, ọkachasị mgbe echekwara ogologo oge, viscosity nke agba ahụ na-ebelata nke ukwuu, na-emetụta arụmọrụ owuwu na ịdị mma nke ngwaahịa. Mbelata na viscosity metụtara ọtụtụ ihe, dịka okpomọkụ, iru mmiri, volatilization nke ihe mgbaze, mmebi polymer, wdg, mana mmekọrịta ya na cellulose ether dị oke mkpa karịsịa.
1. Ọrụ bụ isi nke cellulose ether
Cellulose ether bụ ihe na-eme ka agba sie ike nke a na-ejikarị eme ihe n'elu agba mmiri. Ọrụ ha bụ isi gụnyere:
Mmetụta nke ime ka agba sie ike: Cellulose ether nwere ike ịmepụta usoro netwọk nwere akụkụ atọ nke na-aza aza site na ịmịkọrọ mmiri, si otú a na-eme ka sistemụ ahụ dịkwuo mma ma na-eme ka arụmọrụ nke agba ahụ dịkwuo mma ma na-arụ ọrụ nke ọma.
Mmetụta nkwụsi ike: Cellulose ether nwere ike igbochi nsị nke ihe siri ike dị ka agba na ihe na-ejupụta agba ahụ nke ọma ma nọgide na-enwe otu agba ahụ.
Njirimara nke imepụta ihe nkiri: Cellulose ether nwekwara ike imetụta ihe na-emepụta ihe nkiri nke agba ahụ, na-eme ka mkpuchi ahụ sie ike ma sie ike.
E nwere ọtụtụ ụdị cellulose ethers, gụnyere methyl cellulose (MC), hydroxyethyl cellulose (HEC), hydroxypropyl methyl cellulose (HPMC), wdg. Ihe ndị a nwere ike ịgbaze, ikike ịka nká na iguzogide nchekwa na mkpuchi dị iche iche.
2. Isi ihe kpatara mbelata viscosity
N'oge nchekwa nke mkpuchi, ihe ndị a na-akpatakarị mbelata viscosity:
(1) Mmebi nke cellulose ethers
Mmetụta nke cellulose ethers na mkpuchi na-adabere n'otú ha si dị arọ na otú ha si dịgide n'ọdịdị ha. N'oge nchekwa, ihe ndị dị ka okpomọkụ, acidity na alkalinity, na obere ihe ndị dị ndụ nwere ike ime ka cellulose ethers mebie. Dịka ọmụmaatụ, n'oge nchekwa ogologo oge, ihe ndị dị na acidic ma ọ bụ alkaline dị na mkpuchi ahụ nwere ike imebi usoro cellulose ether, belata ibu ya, ma si otú a mee ka mmetụta ya ghara ịdị nkọ, na-ebute mbelata na viscosity.
(2) Mgbanwe mmiri na mbugharị mmiri na ihe mgbaze
Mgbanwe mmiri nke ihe mgbaze ma ọ bụ mbugharị mmiri n'ime mkpuchi ahụ nwere ike imetụta ọnọdụ mmiri nke cellulose ether. N'oge nchekwa, akụkụ nke mmiri ahụ nwere ike ịpụ apụ ma ọ bụ kwaga n'elu mkpuchi ahụ, na-eme ka nkesa mmiri dị na mkpuchi ahụ ghara ịdị nhata, si otú a na-emetụta ọkwa ọzịza nke cellulose ether ma na-akpata mbelata na viscosity n'ógbè ndị dị.
(3) Mwakpo nje
Mkpụrụ ndụ nwere ike itolite n'ime mkpuchi ahụ ma ọ bụrụ na echekwaghị ya nke ọma ma ọ bụ ihe nchekwa ahụ aghọọ ihe na-adịghị arụ ọrụ. Mkpụrụ ndụ nwere ike imebi cellulose ethers na ihe ndị ọzọ dị mkpa n'ime organic, na-ebelata mmetụta ha na-eme ka ọkpụrụkpụ ha ghara ịdị irè ma na-eme ka viscosity nke mkpuchi ahụ belata. Mkpuchi mmiri, karịsịa, bụ ezigbo ebe maka uto nje bacteria n'ihi na ha nwere nnukwu mmiri.
(4) Ịka nká nke okpomọkụ dị elu
N'ọnọdụ nchekwa okpomọkụ dị elu, nhazi anụ ahụ ma ọ bụ kemịkalụ nke yinye molekul cellulose ether nwere ike ịgbanwe. Dịka ọmụmaatụ, cellulose ethers na-enwekarị oxidation ma ọ bụ pyrolysis na okpomọkụ dị elu, nke na-eme ka mmetụta nke ọkpụrụkpụ ghara ịdị ike. Okpomọkụ dị elu na-emekwa ka volatilization nke ihe mgbaze na evaporation mmiri dịkwuo ngwa ngwa, na-emetụtakwa nkwụsi ike viscosity.
3. Ụzọ esi eme ka nchekwa nke mkpuchi dịkwuo mma
Iji belata mbelata nke viscosity n'oge nchekwa ma mee ka ndụ nchekwa nke mkpuchi ahụ dịkwuo ogologo, enwere ike ịme ihe ndị a:
(1) Ịhọrọ cellulose ether kwesịrị ekwesị
Ụdị dị iche iche nke cellulose ethers nwere arụmọrụ dị iche iche n'ihe gbasara iguzosi ike n'ihe nchekwa. Cellulose ethers nwere nnukwu ibu molekul na-enwekarị mmetụta siri ike ka mma, mana nkwụsi ike nchekwa ha adịghị mma, ebe cellulose ethers nwere obere ibu molekul nwere ike inwe arụmọrụ nchekwa ka mma. Ya mere, mgbe a na-emepụta usoro ahụ, a ga-ahọrọ cellulose ethers nwere ezigbo nkwụsi ike nchekwa, ma ọ bụ a ga-ejikọta cellulose ethers na ihe ndị ọzọ dị arọ iji melite iguzogide nchekwa ha.
(2) Jikwaa pH nke mkpuchi ahụ
Asịd na alkalinity nke sistemụ mkpuchi ahụ nwere mmetụta dị mkpa na nkwụsi ike nke cellulose ethers. N'ime nhazi usoro ahụ, a ga-achịkwa uru pH nke mkpuchi ahụ iji zere gburugburu acidic ma ọ bụ alkaline gabiga ókè iji belata mmebi nke cellulose ethers. N'otu oge ahụ, itinye oke pH nhazi ma ọ bụ ihe nchekwa kwesịrị ekwesị nwere ike inye aka mee ka pH nke sistemụ ahụ kwụsie ike.
(3) Mee ka ojiji nke ihe nchekwa dịkwuo mma
Iji gbochie mbuze nje bacteria, a ga-etinye ihe nchekwa kwesịrị ekwesị na mkpuchi ahụ. Ihe nchekwa nwere ike igbochi uto nke nje bacteria, si otú a gbochie ihe ndị dị ndụ dịka cellulose ether ire ere ma nọgide na-enwe nkwụsi ike nke mkpuchi ahụ. A ga-ahọrọ ihe nchekwa kwesịrị ekwesị dịka usoro mkpuchi na ebe nchekwa si dị, a ga-enyochakwa irè ha mgbe niile.
(4) Jikwaa ebe nchekwa ihe
Okpomọkụ nchekwa na iru mmiri nke mkpuchi ahụ nwere mmetụta kpọmkwem na nkwụsi ike nke viscosity. A ga-echekwa mkpuchi ahụ n'ebe kpọrọ nkụ ma dị jụụ, na-ezere oke okpomọkụ na oke iru mmiri iji belata mgbanwe mmiri na mmebi nke cellulose ether. Na mgbakwunye, nkwakọ ngwaahịa e mechiri emechi nke ọma nwere ike ibelata mbugharị na ikuku mmiri nke ọma ma belata mbelata nke viscosity.
4. Ihe ndị ọzọ na-emetụta viscosity
Tinyere cellulose ethers, ihe ndị ọzọ dị na sistemụ mkpuchi ahụ nwekwara ike imetụta mgbanwe na viscosity. Dịka ọmụmaatụ, ụdị na ntinye nke agba, ọnụego volatilization nke ihe mgbaze, na ndakọrịta nke ihe ndị ọzọ dị arọ ma ọ bụ ihe na-ekesa nwere ike imetụta nkwụsi ike nke mkpuchi ahụ. Ya mere, nhazi zuru oke nke usoro mkpuchi ahụ na mmekọrịta dị n'etiti ihe ndị mejupụtara ya bụkwa isi ihe ndị a ga-elebara anya na ha.
Mbelata nke viscosity n'oge nchekwa mkpuchi ahụ nwere njikọ chiri anya na ihe ndị dị ka mmebi nke cellulose ethers, volatilization nke ihe mgbaze, na mbugharị mmiri. Iji melite iguzosi ike nchekwa nke mkpuchi ahụ, a ga-ahọrọ ụdị cellulose ether kwesịrị ekwesị, a ga-achịkwa pH nke mkpuchi ahụ, a ga-eme ka usoro mgbochi corrosion sie ike, a ga-emezikwa gburugburu ebe nchekwa ahụ nke ọma. Site na nhazi usoro ezi uche dị na ya na njikwa nchekwa dị mma, enwere ike ibelata nsogbu nke viscosity n'oge nchekwa mkpuchi ahụ nke ọma, a pụkwara imeziwanye arụmọrụ nke ngwaahịa ahụ na asọmpi ahịa.
Oge ozi: Sep-27-2024