Hydroxypropyl methylcellulose (HPMC) chinhu chakakosha chekuwedzera mune zvemazuva ano zvinonamira mataira uye ekuvaka makemikari admixtures. Yayo yakawanda inoshanda inosimudzira ese maficha ekunamira maumbirwo, kubatsira kuvandudza processability, kuchengetedza mvura, kunamatira uye kuita kwese.
Indasitiri yekuvaka inoenderera mberi nekutsvaga zvigadziriso zvekuvandudza mashandiro uye kusimba kwezvivakwa zvekuvaka. Pakati pezvakasiyana-siyana zvekuwedzera zvinoshandiswa mukuvaka makemikari maumbirwo, hydroxypropyl methylcellulose (HPMC) yakwezva kutarisisa nekuda kwekuwanda kwayo kwakanakira mumatairi anonamira uye ekuvaka makemikari admixtures. HPMC inotorwa kubva kune cellulose ine yakasarudzika zvivakwa izvo zvinogona kukanganisa mashandiro ezvinonamira uye kugadzirisa huwandu hwese hwemapurojekiti ekuvaka. Chinangwa chechinyorwa chino ndechekuongorora basa uye mabhenefiti eHPMC mukunamira mataira uye musanganiswa wemakemikari ekuvaka, kujekesa chimiro chayo chemakemikari, maitiro ekuita uye zvakanakira izvo zvinopa kuindasitiri yekuvaka.
1. Kuumbwa kwemakemikari uye zvivakwa zveHPMC:
Hydroxypropyl methylcellulose (HPMC) inonzi semi-synthetic polymer yakagadziridzwa kubva muselulosi. Inogadzirwa nekurapa cellulose nepropylene oxide uye methyl chloride, inogadzira komputa ine hydroxypropyl uye methyl substituents (-OH uye -CH3 mapoka) akabatanidzwa kune cellulose musana. Iyo dhigirii yekutsiva (DS) yehydroxypropyl uye methyl mapoka inosarudza zvimiro zveHPMC, kusanganisira viscosity, solubility, uye kugadzikana kwekupisa.
HPMC ine yakanakisa solubility yemvura uye inoumba yakajeka uye viscous mhinduro kana yakaparadzirwa mumvura. Nekudaro, kunyungudika kwayo kunoenderana netembiricha, ine tembiricha yakakwira ichifarira kunyungudika. Ichi chivakwa chinoita kuti HPMC ikwane kushandiswa mukuvaka makemikari maumbirwo apo mvura-yakavakirwa masisitimu akapararira. Pamusoro pezvo, HPMC inopa pseudoplastic maitiro kune mhinduro, zvichireva kuti viscosity yayo inodzikira pasi pekunetseka kweshear, nekudaro ichifambisa kusununguka kwekushandisa uye kuvandudza processability yeanonamatira maumbirwo.
2. Iyo nzira yekuita yeceramic tile adhesive:
Mumataira anonamira maumbirwo, HPMC inoshanda akasiyana siyana nekuda kweiyo yakasarudzika kemikari chimiro uye zvivakwa. Rimwe remabasa ayo makuru nderokuita semukobvu, kuvandudza kuwirirana uye kushanda kwekunamatira. Nekuwedzera viscosity, HPMC inobatsira kudzivirira dhaka rinonamira kubva pakudonha kana kudonha, kuve nechokwadi chekuvhara kwakaringana uye kubatana pakati petaira uye substrate.
HPMC inoshandawo sechinhu chinochengetedza mvura, ichibvumira kunamira kuchengetedza hunyoro hwakakwana panguva yekurapa. Ichi chivakwa chakakosha kuve nechokwadi chekuti hydration yakakodzera yesimende zvinhu mune inonamira, kusimudzira mabhondi akasimba uye kuderedza njodzi yekuputsika. Pamusoro pezvo, kugona kwekubata mvura kweHPMC kunobatsira kuwedzera nguva yakavhurika, ichibvumira nguva yakakwana yekuisa mataira uye kugadzirisa pamberi pekunamatira seti.
HPMC inoumba inoshanduka uye inonamira firimu kana ichiomesa, nekudaro ichivandudza iyo yekubatanidza hunhu hweiyo tile inonamira. Iyo firimu inoshanda seyakanamatira, inokurudzira kusungirirwa pakati peiyo adhesive layer, mataira uye substrate. Kuvapo kweHPMC kunosimudzira iyo yakazara chisungo simba uye kusimba kweiyo kuisirwa mataira, ichideredza mukana wekuita debonding kana delamination nekufamba kwenguva.
3. Mhedzisiro pakuvaka makemikari admixtures:
Pamusoro pekunamatira mataira, HPMC inoshandiswa zvakanyanya mumhando dzakasiyana dzekuvaka makemikari admixtures, kusanganisira madhaka, plasters uye grouts. Yayo yakawanda-inoshanda zvimiro inoita kuti ive chinhu chakakosha chekuwedzera kusimudzira kushanda uye kusimba kweizvi zvinhu. Mumatope, HPMC inoita seye rheology modifier, inodzora mafambiro ekuyerera uye kuenderana kwemusanganiswa. Izvi zvinogonesa kushandiswa kwakafanana uye kuvandudzwa kwekushanda, kunofambisa kuiswa uye kuderedza tsvina yezvinhu.
HPMC inobatsira kuvandudza zvimisikidzo zvekuzvimiririra zvemakomisheni epasi uye mhodzi dzeSCR, zvichibvumira kutsetseka, kunyange pamusoro. Kukwanisa kwayo kubata mvura kunodzivirira musanganiswa kubva pakuoma nguva isati yakwana, inosimudzira kurapa kwakakodzera uye inoderedza kusakwana kwepamusoro senge kuputika kana kuputika. Uye zvakare, HPMC inosimudzira kunamatira uye kunamatira kwepurasita uye grouts, zvichikonzera kusimba, kwakanyanya kunaka kupera.
Iko kushandiswa kweHPMC mukuvaka makemikari admixtures inoenderana nezvinangwa zvekusimudzira zveindasitiri yekuvaka. Nekuvandudza kushandiswa uye kuderedza kushandiswa kwezvinhu, HPMC inobatsira mukugadzirisa zviwanikwa uye kuderedza marara. Pamusoro pezvo, basa rayo mukusimudzira kusimba kwemidziyo yekuvakisa inobatsira kurebesa hupenyu hwechivako, nekudaro ichideredza kudiwa kwekugarogadziridzwa kana kutsiviwa.
Hydroxypropyl methylcellulose (HPMC) inobata basa rakakosha mumatairi emazuva ano anonamira uye musanganiswa wemakemikari ekuvaka, ichipa akasiyana mabhenefiti anobatsira kuvandudza mashandiro, kushanda uye kusimba. Yayo yakasarudzika makemikari kuumbwa uye zvimiro zvinoigonesa kuita seyakakora, inochengetedza mvura mumiriri uye inosimudzira adhesion mukunamira maumbirwo. Uye zvakare, HPMC inokwidziridza rheological zvivakwa zvekuvaka makemikari admixtures kufambisa kushandiswa uye kuve nechokwadi chekufanana kwechigadzirwa chakapedzwa.
Iko kushandiswa kwakapararira kweHPMC muindasitiri yekuvaka inosimbisa kukosha kwayo sechinhu chinowedzera chinowedzera chinovandudza kunaka uye kusimba kwezvinhu zvekuvaka. Sezvo maitiro ekuvaka ari kuramba achishanduka, kudiwa kwezvigadziriso zvitsva zvekuvandudza kushanda nesimba uye kusimba kunofambisa kutsvagisa nekuvandudzwa kweHPMC-based formulations. Nekushandisa zvinogoneka zveHPMC, indasitiri yekuvaka inogona kuona kufambira mberi mukuita kwezvinhu uye kubatsira mukuvandudza kwenzvimbo inotsiga uye yakasimba yakavakirwa.
Nguva yekutumira: Feb-26-2024