HPMC maka ngwa agha agwakọta akọrọ

Njirimara HPMC na ngwa agha agwakọta akpọnwụ akpọnwụ

1, HPMC na njirimara nke ngwa agha nkịtị

A na-ejikarị HPMC eme ihe dị ka retarder na onye na-ejigide mmiri na oke ciment.N'ime ihe ndị siri ike na ngwa agha, ọ nwere ike melite viscosity na ọnụego mbelata, na-ewusi ike njikọ ike, na-achịkwa oge nhazi nke ciment, ma melite ike mbụ na ike mgbanwe agbanwe agbanwe.N'ihi na ọ nwere ọrụ nke njide mmiri, nwere ike ibelata mmiri na-efunahụ n'elu coagulation, nwere ike izere ihe omume nke mgbawa na nsọtụ, ma nwee ike imeziwanye adhesion na ịrụ ọrụ ihe owuwu.Karịsịa n'ime ihe owuwu ahụ, nwere ike ịgbatị ma gbanwee oge nhazi, na mmụba nke usoro ọgwụgwọ HPMC, oge nhazi ngwa agha agbatịwo;Melite machinability na pumpability, adabara maka ihe owuwu mechanized;Ọ nwere ike imeziwanye nrụpụta ihe owuwu ma gbochie ihu igwe nke nnu na-agbaze mmiri n'elu ụlọ.

2, HPMC na njirimara ngwa agha pụrụ iche

HPMC bụ onye na-ejigide mmiri dị mma maka ngwa ngwa akọrọ, nke na-ebelata ọnụ ọgụgụ ọbara ọgbụgba na ogo ngwa ngwa ma na-eme ka njikọta nke ngwa agha dịkwuo mma.HPMC nwere ike melite ike tensile na njikọ nke ngwa agha, n'agbanyeghị na ike na-ehulata na ike mkpakọ nke ngwa agha na-ebelata ntakịrị site na HPMC.Tụkwasị na nke ahụ, HPMC nwere ike igbochi nhazi nke plastik na ngwa ngwa, belata ntinye ntinye nke plastik nke ngwa agha, njigide mmiri mmiri na-abawanye na mmụba nke viscosity nke HPMC, na mgbe viscosity karịrị 100000mPa•s, njide mmiri agaghịzi adị. mụbara nke ukwuu.Ịdị mma nke HPMC nwekwara mmetụta ụfọdụ na njigide mmiri nke ngwa agha, mgbe ihe ahụ dị mma, a na-emeziwanye ọnụọgụ mmiri nke mmiri mmiri, nke a na-ejikarị eme ihe maka ciment ngwa ngwa HPMC nha kwesịrị ịbụ ihe na-erughị 180 microns (80 mesh screen). .Ọdịnaya kwesịrị ekwesị nke HPMC na ngwa agha akọrọ bụ 1‰ ~ 3‰.

2.1, ngwa agha HPMC mgbe etisasịwo na mmiri, n'ihi na elu-arụ ọrụ ọrụ iji hụ na gelled ihe n'ụzọ dị irè edo nkesa na usoro, na HPMC dị ka ụdị nchebe colloid, "ngwugwu" siri ike ahụ, na na ya mputa elu na-etolite a. oyi akwa nke lubrication film, na-eme ka slurry usoro bụ ihe kwụsiri ike, nakwa weliri ngwa agha na Ịgwakọta usoro nke liquidity na-ewu nke ileghara nwere ike dị ka nke ọma.

2.2 HPMC ngwọta ruru ya molekụla Ọdịdị e ji mara, nke mere na mmiri na ngwa agha adịghị mfe ida, na nke nta nke nta wepụtara na a ogologo oge nke oge, na-enye ngwa agha ọma mmiri njigide na-ewu.Na-egbochi mmiri ịkwaga ngwa ngwa site na ngwa ngwa gaa na isi, nke mere na mmiri a na-ejide n'aka na-anọgide n'elu ihe ọhụrụ ahụ, nke na-akwalite hydration nke ciment ma mee ka ike ikpeazụ dịkwuo mma.Karịsịa, ọ bụrụ na interface dị na kọntaktị na ngwa ngwa ciment, nkedo na ihe nkedo na-efunahụ mmiri, akụkụ a enweghị ike na ọ fọrọ nke nta ka ọ bụrụ enweghị njikọ.N'ikwu okwu n'ozuzu, elu na kọntaktị na ihe ndị a bụ adsorption ozu, karịa ma ọ bụ obere iji banye ụfọdụ mmiri si n'elu, na-eme ka akụkụ a nke hydration adịghị ezu, nke mere na ngwa ngwa ciment na ceramic tile substrate na seramiiki tile ma ọ bụ plasta na Metope bond ike adalata.

Na nkwadebe nke ngwa agha, njigide mmiri nke HPMC bụ isi ọrụ.E gosiputara na njide mmiri nwere ike iru 95%.Mmụba nke arọ molekụla HPMC na usoro simenti ga-eme ka njide mmiri na ike njikọ nke ngwa agha dịkwuo mma.

Ihe Nlereanya: n'ihi na ihe nkedo tile ga-enwerịrị ike njikọ dị elu n'etiti isi na tile, ya mere ihe nkedo na-emetụta akụkụ abụọ nke mmiri adsorption;Isi (mgbidi) elu na taịlị.Special ceramic tile, àgwà dị iche dị nnọọ ukwuu, ụfọdụ n'ime pores dị nnọọ ukwuu, seramiiki tile mmiri absorption ọnụego dị elu, nke mere na nkekọ arụmọrụ na-ebibi, mmiri na-ejigide ihe dị mkpa karịsịa, na mgbakwunye na nke HPMC nwere ike izute nke a nke ọma. chọrọ.

2.3 HPMC kwụsiri ike na acids na bases, na mmiri mmiri ngwọta ya bụ nnọọ ike na nso nke pH = 2 ~ 12. Caustic soda na lime mmiri adịghị enwe mmetụta dị ukwuu na ya Njirimara, ma alkali nwere ike mee ngwangwa ya mgbasa ọnụego, na ubé melite viscosity.

2.4, agbakwunyere na arụ ọrụ ngwa agha HPMC emeela ka ọ dịkwuo mma, ngwa agha yiri ka ọ nwere "mmanu mmanu", nwere ike ime ka mgbidi mgbidi jupụta, dị mma n'elu, nke mere na tile ma ọ bụ brik na ntọala njikọ, ma nwee ike ịgbatị oge ọrụ, dabara maka nnukwu. mpaghara ihe owuwu.

2.5 HPMC bụ ụdị electrolyte na-abụghị ionic na nke na-abụghị polymeric.Ọ bụ nnọọ kwụsiri ike na aqueous ngwọta na metal salts na organic electrolytes, na ike-atụkwasịkwara na ụlọ ihe ruo ogologo oge iji hụ na ya anwụ ngwa ngwa mma.

Usoro mmepụta HPMC bụ tumadi eriri owu (ụlọ) mgbe alkalization, etherification na ọgbọ nke ngwaahịa ether polysaccharide.Ọ nweghị ụgwọ n'onwe ya, ọ naghị emeghachi omume na ion ebubo na ihe gelled, na arụmọrụ ya kwụsiri ike.Ọnụ ego ahụ dị ala karịa ụdị cellulose ether ndị ọzọ, n'ihi ya, a na-eji ya eme ihe na ngwa ngwa akọrọ.

Hydroxypropyl methyl cellulose HPMCọrụ na akọrọ agwakọta ngwa agha:

HPMCnwere ike ime ka ngwa ngwa ngwakọta ọhụrụ ahụ sie ike ka o wee nwee viscosity ụfọdụ mmiri, iji gbochie nkewa.Njide mmiri (thickening) bụkwa ihe kachasị mkpa, na-enyere aka ịnọgide na-enwe mmiri n'efu na ngwa ngwa, si otú a na-enye ihe simenti na-enyekwu oge iji mee ka mmiri na-ekpo ọkụ mgbe a na-etinye ihe mgbochi ahụ.(mmiri njide) ikuku nke ya, nwere ike iwebata obere obere egosipụta edo edo, meziwanye ihe owuwu nke ngwa agha.

Hydroxypropyl methyl cellulose ether viscosity na-arụ ọrụ njigide mmiri ka mma.Viscosity bụ oke dị mkpa nke arụmọrụ HPMC.Ka ọ dị ugbu a, ndị na-emepụta HPMC dị iche iche na-eji ụzọ na ngwa dị iche iche chọpụta viscosity nke HPMC.Ụzọ ndị bụ isi bụ HaakeRotovisko, Hoppler, Ubbelohde na Brookfield, wdg.

Maka otu ngwaahịa ahụ, nsonaazụ nke viscosity tụrụ site na ụzọ dị iche iche dị nnọọ iche, ụfọdụ bụ ọbụna ọtụtụ ọdịiche.Ya mere, mgbe ị na-atụnyere viscosity, a ghaghị ime ya n'etiti otu usoro ule, gụnyere okpomọkụ, rotor, wdg.

N'ihi na urughuru size, mma urughuru, mma na mmiri njigide.Nnukwu ahụ nke cellulose ether kọntaktị na mmiri, n'elu ozugbo igbari na-etolite a jel kechie ihe iji gbochie mmiri ụmụ irighiri ịnọgide na-abanye n'ime, mgbe ụfọdụ ogologo oge na-akpali akpali enweghị ike evenly gbasasịrị etisasịwo, guzobe a apịtị flocculent ngwọta ma ọ bụ. agglomerate.Solubility nke cellulose ether bụ otu n'ime ihe ndị na-ahọrọ cellulose ether.Ịdị mma bụkwa ihe ngosi arụmọrụ dị mkpa nke methyl cellulose ether.MC maka ngwa agha akọrọ chọrọ ntụ ntụ, ọdịnaya mmiri dị ala, yana ịdị mma nke 20% ~ 60% nha nha na-erughị 63um.Ịdị mma na-emetụta solubility nke hydroxypropyl methyl cellulose ether.Oke MC na-abụkarị granular na enwere ike ịgbaze ngwa ngwa n'ime mmiri na-enweghị agglomerating, mana mgbasa mgbasa na-adị ngwa ngwa, yabụ na ọ naghị adabara iji ngwa ngwa akọrọ.N'ime ngwa agha akọrọ, MC na-agbasasị n'etiti mkpokọta, ihe ndị dị mma na ihe simenti dị ka ciment, na naanị ntụ ntụ nke dị mma nwere ike izere ịchịkọta methyl cellulose ether mgbe ị na-agwakọta mmiri.Mgbe MC gbakwunyere mmiri iji gbazee agglomerate, ọ na-esiri ike ịgbasa na igbari ya.MC nwere ezigbo mma ọ bụghị naanị mkpofu, kamakwa ọ na-ebelata ike ngwa agha mpaghara.Mgbe a na-arụ ngwa ngwa akọrọ dị otú ahụ n'ebe buru ibu, a na-ebelata ọsọ nke ngwa ngwa akọrọ na mpaghara, na-ebute mgbawa nke oge ọgwụgwọ dị iche iche kpatara.Maka ngwa agha ịgbasa igwe, n'ihi obere oge ịgwakọta, ịdị mma dị elu.

N'ikwu okwu n'ozuzu, ka viscosity dị elu, ka mma na-ejide mmiri.Otú ọ dị, ka elu viscosity bụ, elu nke molekụla arọ nke MC bụ, na mgbasa arụmọrụ ga-ebelata kwekọrọ ekwekọ, nke nwere mmetụta ọjọọ na ike na ewu arụmọrụ nke ngwa agha.Ihe dị elu nke viscosity, otú ahụ ka ọ na-apụta ìhè na mmetụta nke ngwa ngwa, ma ọ bụghị nke kwekọrọ na mmekọrịta ahụ.N'ịdị elu nke viscosity, ngwa agha mmiri ga-adịkwu nro, ma ihe owuwu ahụ, arụ ọrụ nke scraper na-egbuke egbuke na nnukwu nchikota na ihe isi.Mana ọ naghị enye aka ịbawanye ike nhazi nke ngwa agha mmiri.N'ikwu ya n'ụzọ ọzọ, arụ ọrụ mgbochi sag abụghị ihe doro anya n'oge a na-ewu ụlọ.N'ụzọ megidere nke ahụ, ụfọdụ viscosity dị ala mana emegharịrị methyl cellulose ethers nwere ọmarịcha arụmọrụ n'ịkwalite ike nhazi nke ngwa agha mmiri.

Njide mmiri nke HPMC na-emetụtakwa ọnọdụ okpomọkụ nke ojiji, na njide mmiri nke methyl cellulose ether na-ebelata na ịrị elu nke okpomọkụ.Ma n'ezie ihe ngwa ngwa, ọtụtụ gburugburu nke akọrọ ngwa agha mgbe ga-abụ na elu okpomọkụ (elu 40 degrees) n'okpuru ọnọdụ nke ewu na-ekpo ọkụ mkpụrụ, dị ka okpomọkụ insolation nke mputa mgbidi putty plasta, nke na-emekarị accelerated na solidification nke. simenti na akọrọ ngwa agha hardening.Mbelata nke ọnụ ọgụgụ njide mmiri na-eduga na mmetụta doro anya na ma nrụpụta na nkwụsi ike na-emetụta.N'ọnọdụ a, ibelata mmetụta nke ihe okpomọkụ na-aghọ nke dị oke egwu.N'akụkụ a, ihe mgbakwunye methyl hydroxyethyl cellulose ether ka a na-ewere ugbu a dị ka ụzọ mbụ na mmepe teknụzụ.Ọbụlagodi na mmụba nke usoro onunu ogwu methyl hydroxyethyl cellulose (usoro ọkọchị), ihe owuwu na nguzogide mgbawa enweghị ike igbo mkpa nke ojiji.Site na ọgwụgwọ pụrụ iche nke MC, dị ka ịba ụba nke etherification, mmetụta njigide mmiri nke MC nwere ike ịnọgide na-enwe mmetụta dị mma n'okpuru okpomọkụ dị elu, ka o wee nwee ike inye ọrụ ka mma n'okpuru ọnọdụ siri ike.

General HPMC nwere jel okpomọkụ, nwere ike roughly kewara n'ime 60, 65, 75 ụdị.N'ihi na nkịtị njikere-agwakọta ngwa agha na-eji osimiri ájá Enterprises nwere mma họrọ elu jel okpomọkụ 75 HPMC.Usoro ọgwụgwọ HPMC ekwesịghị ịdị elu, oke dị elu ga-eme ka mmiri na-achọ ngwa ngwa, ga-arapara na plasta, oge condensation dị ogologo, na-emetụta ihe owuwu ahụ.Ngwa ngwa ngwa dị iche iche na-ahọrọ viscosity dị iche iche nke HPMC, ejila HPMC dị elu na-enweghị atụ.Ya mere, ọ bụ ezie na ngwaahịa hydroxypropyl methyl cellulose dị mma, ma ọ dị mma ịhọrọ HPMC ziri ezi bụ ọrụ bụ isi nke ndị ọrụ ụlọ ọrụ ụlọ ọrụ.Ka ọ dị ugbu a, e nwere ọtụtụ ndị na-ere ahịa iwu na-akwadoghị na ogige ahụ na HPMC, àgwà adịghị mma, ụlọ nyocha ahụ kwesịrị ịdị na nhọrọ nke ụfọdụ cellulose, mee nnwale dị mma, hụ na nkwụsi ike nke ngwaahịa ngwa agha, adịghị achọ ọnụ ala, na-akpata mfu na-enweghị isi.