1. Dambudziko Muchidimbu
Hydroxyethyl cellulose (HEC)ndeye thickener uye rheology modifier inoshandiswa zvakanyanya mu latex pendi, iyo inogona kuvandudza viscosity, kuenzanisa uye kuchengetedza kugadzikana kwepende. Nekudaro, mumashandisirwo anoshanda, HEC dzimwe nguva inonamira kugadzira makristasi, inokanganisa chitarisiko, kuita kwekuvaka uye kunyangwe kugadzikana kwekuchengeta pendi.
2. Kuongororwa kwezvikonzero zvekuumbwa kwekristaro
Kusakwana kuparara: Kuparara kweHEC mumvura kunoda mamiriro chaiwo anokurudzira uye nguva. Kusakwana kunyungudika kunogona kukonzera kuwandisa kwenzvimbo, nokudaro kuumba kunaya kwekristaro.
Dambudziko remhando yemvura: Kushandisa mvura yakaoma kana mvura ine tsvina yakawanda kuchaita kuti HEC iite nemaioni esimbi (seCa²⁺, Mg²⁺) kugadzira mvura isinganyungudika.
Formula isina kugadzikana: Zvimwe zvinowedzera mufomula (zvakadai sezvidziviriro, zvinoparadzira) zvinogona kuita zvisingaenderane neHEC, zvichiita kuti inaye uye igadzire makristasi.
Mamiriro asina kunaka ekuchengetedza: Kunyanya kupisa kana kuchengetedza kwenguva refu kunogona kuita kuti HEC idzoke zvakare kana kudonhedza, kunyanya mukupisa kwakanyanya uye kunyorova kwenzvimbo.
pH kukosha kunoshanduka: HEC inonzwisisa pH, uye yakanyanya acidic kana alkaline nharaunda inogona kuparadza chiyero chayo chekunyungudika uye kukonzera kunaya kwekristaro.
3. Mhinduro
Mukupindura matambudziko ari pamusoro apa, matanho anotevera anogona kutorwa kudzivirira kana kuderedza chiitiko cheHEC kugadzira makristasi mu latex pendi:
Gadzirisa nzira yekumisa yeHEC
Shandisa pre-dispersion method: tanga uchisasa zvishoma nezvishoma HEC mumvura pasi pepasi-speed inomutsa kuti usapinda agglomeration inokonzerwa nekuisa zvakananga; wozoirega imire kwemaminetsi anopfuura makumi matatu kuti inyatsonyorova, uye pakupedzisira ikurungire nekumhanya kukuru kusvika yanyungudika zvachose.
Shandisa nzira yekupisa yemvura inopisa: kunyungudutsa HEC mumvura inodziya pa50-60 ℃ inogona kukurumidza kunyungudika, asi dzivirira kupisa kwakanyanya (kupfuura 80 ℃), zvikasadaro zvinogona kukonzera kuderera kweHEC.
Shandisa zvakakodzera co-solvents, zvakadai sediki shoma ye ethylene glycol, propylene glycol, nezvimwewo, kukurudzira kuparara kweunifomu yeHEC uye kuderedza crystallization inokonzerwa nekunyanyisa kwenharaunda.
Kuvandudza kunaka kwemvura
Shandisa mvura ine deionized kana mvura yakapfava pachinzvimbo chemvura yemupombi yakajairwa kuderedza kupindira kwemaoni esimbi.
Kuwedzera huwandu hwakakodzera hwechelating agent (yakadai seEDTA) kune latex pendi fomula inogona kunyatsodzikamisa mhinduro uye kudzivirira HEC kubva pakuita nesimbi ions.
Gadzirisa fomula dhizaini
Dzivisa zvinowedzera izvo zvisingaenderane neHEC, senge mamwe ma-preservatives emunyu wakanyanya kana zvimwe zvinoparadzira. Zvinokurudzirwa kuita kuenderana bvunzo usati washandisa.
Dzora kukosha kwepH yependi yelatex pakati pe7.5-9.0 kudzivirira HEC kubva pakunaya nekuda kwekushanduka-shanduka kwepH.
Kudzora kuchengetedza mamiriro
Nzvimbo yekuchengetera yepende yelatex inofanirwa kuchengetedza tembiricha ine mwero (5-35 ℃) uye kudzivirira nzvimbo dzenguva refu dzakakwirira kana dzakaderera tembiricha.
Chengetedza yakavharwa kudzivirira kunyorova kwemhepo kana kusvibiswa, dzivirira kuwedzera kwenzvimbo muHEC yevasungwa nekuda kwekunyungudika kwesolvent, uye kukurudzira crystallization.
Sarudza yakakodzera HEC dzakasiyana
Mhando dzakasiyana dzeHEC dzine misiyano mukunyungudika, viscosity, etc. Inokurudzirwa kusarudza HEC ine dhigirii yepamusoro yekutsiviwa uye yakaderera viscosity kuti kuderedze maitiro ayo ekuvhenekesa pakakwirira.
Nekugadzirisa iyo dissolution mode yeHEC, kuvandudza hutano hwemvura, kugadzirisa maitiro, kutonga nzvimbo yekuchengetedza uye kusarudza zvakakodzera HEC zvakasiyana-siyana, kuumbwa kwemakristasi mupende ye latex kunogona kunyatsodziviswa kana kuderedzwa, nokudaro kuvandudza kugadzikana uye kushanda kwekuvaka kwepende ye latex. Muchiitiko chaicho chekugadzira, zvigadziriso zvakanangwa zvinofanirwa kuitwa zvinoenderana nemamiriro ezvinhu kuti ive nechokwadi chemhando yechigadzirwa uye ruzivo rwemushandisi.
Nguva yekutumira: Mar-26-2025