Hydroxyethyl cellulose (HEC), chinhu chakasimba chena kana cheyero yakajeka, chisina hwema, chisina chepfu, chine fibrous kana powdery, chakagadzirwa ne etherification ye alkaline cellulose ne ethylene oxide (kana chlorohydrin), chiri cherudzi rwe Nonionic soluble cellulose ethers. Nekuti HEC ine hunhu hwakanaka hwekukora, kumisa, kuparadzira, emulsifying, bonding, film-forming, kuchengetedza hunyoro uye kupa colloids dzinodzivirira, yakashandiswa zvakanyanya mukutsvaga mafuta, kuputira, kuvaka, mishonga nechikafu, machira, kugadzira mapepa nema polymers. Polymerization nedzimwe nzvimbo.
Mushure mekunge hydroxyethyl cellulose yasangana nependi inobva mumvura?
Sechinhu chisiri cheionic surfactant, hydroxyethyl cellulose ine zvinhu zvinotevera pamusoro pekukora, kumisa, kusunga, kutenderera, kugadzira firimu, kupararira, kuchengetedza mvura uye kupa ma colloids ekudzivirira:
HEC inonyungudika mumvura inopisa kana inotonhora, uye hainyungudike kana yapisa zvakanyanya kana kufashaira, zvichiita kuti ive nemhando dzakasiyana-siyana dzekunyungudika uye kunaka, pamwe nekugadzira gelling isingapisi;
Kugona kuchengetedza mvura kwakapetwa kaviri pane methyl cellulose, uye ine kurongeka kuri nani kwekuyerera kwemvura;
Kana tichienzanisa ne methyl cellulose inozivikanwa uye hydroxypropyl methyl cellulose, HEC ndiyo inonyanya kupararira, asi colloid yekudzivirira ndiyo yakanyanya kusimba;
Haina ionic uye inogona kushanda pamwe chete nemamwe mapolymer anonyungudika mumvura, masurfactants, uye munyu. Ichinhu chakanakisa che colloidal thickener chekugadzirisa ma electrolyte ane huwandu hwakawanda.
Mashandisirwo ehydroxyethyl cellulose?
Wedzera zvakananga panguva yekugadzira - nzira iyi ndiyo iri nyore uye inotora nguva shoma:
Tanga kusanganisa nguva dzose nekumhanya kwakaderera uye zvishoma nezvishoma sefa hydroxyethyl cellulose zvakaenzana mumushonga uye ramba uchikurunga kusvika zvidimbu zvese zvanyorova. Wobva wawedzera zvinochengetedza nezvimwe zvinowedzera. Zvakadai sepigments, dispersing aids, ammonia, nezvimwewo. Kurudzira kusvika hydroxyethyl cellulose yese yanyungudika zvachose (viscosity yemushonga inowedzera zvakanyanya) usati wawedzera zvimwe zvikamu mufomura kuti uite reaction.
Yakashongedzerwa nedoro remumba
Kugadzirira doro remushonga rine huwandu hwakanyanya kutanga, wozoriisa muchigadzirwa. Chakanakira nzira iyi ndechekuti rine kuchinjika kukuru uye rinogona kuwedzerwa zvakananga kuchigadzirwa chapera, asi rinofanira kuchengetwa zvakanaka. Matanho enzira iyi akafanana nematanho mazhinji ari muMethod 1; musiyano ndewekuti hapana chikonzero chekushandisa agitator ine shear yakawanda, uye mamwe agitators ane simba rakakwana rekuchengetedza hydroxyethyl cellulose yakapararira zvakaenzana mumushonga anogona kushandiswa, uye kuramba uchisanganisa kusvika yanyungudika zvachose kuita viscous solution. Zvisinei, zvinofanira kucherechedzwa kuti mushonga we fungicidal unofanirwa kuwedzerwa kune doro remushonga nekukurumidza sezvinobvira.
Mazano akanaka:
Sezvo hydroxyethyl cellulose yakagadziriswa pamusoro iri powdery kana fibrous solid, paunenge uchigadzira hydroxyethyl cellulose mother liquor, yeuka kuti unofanira kuteerera zvinotevera:
Usati waisa hydroxyethyl cellulose uye mushure mekuwedzera, inofanira kuramba ichikurunga kusvika mhinduro yacho yanyatsojeka uye yakajeka;
Inofanira kuseferwa mubhara rekusanganisa zvishoma nezvishoma, uye usabatanidza zvakananga mapundu kana maspheroid nehydroxyethyl cellulose mubhara rekusanganisa;
Kupisa kwemvura uye pH yemvura zvine hukama hwakakosha nekunyungudika kwehydroxyethyl cellulose, saka kutarisisa kwakakosha kunofanira kupihwa kwairi;
Usawedzera zvimwe zvinhu zvine alkaline mumusanganiswa usati watangahydroxyethyl celluloseupfu hunonyikwa nemvura. Kuwedzera pH mushure mekunyikwa kunobatsira kunyungudika;
Nepose pazvinogoneka, wedzera mushonga wekuuraya fungus pachine nguva;
Pakushandisa high-viscosity hydroxyethyl cellulose, huwandu hwedoro raamai harifanirwe kupfuura 2.5-3% (nehuremu), zvikasadaro doro raamai rinonetsa kubata naro.
Nguva yekutumira: Kubvumbi-28-2024