Abstract:
Mumakore achangopfuura, majasi emvura-akavakirwa kutariswa kwakapararira nekuda kwehushamwari hwavo kwezvakatipoteredza uye yakaderera volatile organic compound (VOC) zvemukati.Hydroxyethylcellulose (HEC) inoshandiswa zvakanyanya mumvura-soluble polymer mune aya magadzirirwo, inoshanda seyakakora kuwedzera viscosity uye kutonga rheology.
suma:
1.1 Background:
Mvura-based coatings yave imwe yakasarudzika yezvakatipoteredza kune yechinyakare solvent-based coatings, kugadzirisa matambudziko ane chekuita nekusagadzikana organic compound emissions uye kukanganisa kwezvakatipoteredza.Hydroxyethylcellulose (HEC) inotorwa selulosi inova chinhu chakakosha mukugadzira mvura-yakavakirwa machira uye inopa rheology kutonga uye kugadzikana.
1.2 Zvinangwa:
Ichi chinyorwa chine chinangwa chekujekesa iyo solubility maitiro eHEC mumvura-based coatings uye kudzidza pesvedzero yezvakasiyana-siyana pane viscosity yayo.Kunzwisisa zvinhu izvi kwakakosha pakugadzirisa maumbirwo ekubika uye kuwana kuita kwaunoda.
Hydroxyethyl cellulose (HEC):
2.1 Chimiro uye kuita:
HEC inogadzirwa ne cellulose inowanikwa ne etherification reaction ye cellulose uye ethylene oxide.Kuunzwa kwemapoka e-hydroxyethyl mumusana we cellulose kunobatsira mukunyungudika kwayo kwemvura uye kunoita kuti ive yakakosha polima mumasisitimu emvura.Iyo molecular chimiro uye zvivakwa zveHEC zvichakurukurwa zvakadzama.
Solubility yeHEC mumvura:
3.1 Zvinhu zvinokanganisa solubility:
Kunyungudika kweHEC mumvura kunokanganiswa nezvinhu zvakati wandei, zvinosanganisira tembiricha, pH, uye kuisa pfungwa.Izvi zvinhu uye maitiro avo paHEC solubility zvichakurukurwa, zvichipa ruzivo rwemamiriro ezvinhu anofarira kuparara kweHEC.
3.2 Solubility muganho:
Kunzwisisa iyo yepamusoro uye yakaderera solubility miganhu yeHEC mumvura yakakosha pakugadzira machira ane optimal performance.Ichi chikamu chinotarisa mukati meiyo yekutarisa iyo HEC inoratidza yakanyanya solubility uye mhedzisiro yekupfuura iyi miganhu.
Wedzera viscosity neHEC:
4.1 Basa reHEC mune viscosity:
HEC inoshandiswa seyakakora mumvura-based coatings kubatsira kuwedzera viscosity uye kugadzirisa rheological maitiro.Iyo nzira iyo HEC inowana nayo viscosity control ichaongororwa, ichisimbisa kupindirana kwayo nemamorekuru emvura uye zvimwe zvinongedzo mukugadzira coating.
4.2 Mhedzisiro yemafomula akasiyana pane viscosity:
Yakasiyana-siyana magadzirirwo akasiyana, anosanganisira HEC kutariswa, tembiricha, uye shear rate, inogona kukanganisa zvakanyanya viscosity yehuputi hwemvura.Ichi chikamu chichaongorora kukanganisa kweizvi zvinoshanduka pane viscosity yeHEC-ine majasi kuti ipe ruzivo runoshanda kune vanogadzira.
Zvikumbiro uye tarisiro yeramangwana:
5.1 Zvishandiso zveindasitiri:
HEC inoshandiswa zvakanyanya mumaindasitiri akasiyana siyana mapendi, anonamira uye sealants.Ichi chikamu chinosimbisa iyo chaiyo mipiro yeHEC kune yakavharwa nemvura mumashandisirwo aya uye inokurukura zvakanakira zvayo pane mamwe makobvu.
5.2 Mafambiro ekutsvagisa ramangwana:
Sezvo kudiwa kweakasimba uye epamusoro-kuita machira ari kuramba achikura, remangwana tsvakiridzo dhairekitori mumunda weHEC-yakavakirwa maumbirwo achaongororwa.Izvi zvinogona kusanganisira hunyanzvi mukugadziridzwa kweHEC, nzira dzekugadzira dzinoverengeka, uye nzira dzemhando yepamusoro.
mukupedzisa:
Kupfupisa zvakawanikwa zvakanyanya, chikamu ichi chichasimbisa kukosha kwekunyungudika uye viscosity control mumachira emvura uchishandisa HEC.Ichi chinyorwa chinozopedzisa nemaitiro anoshanda kune vanogadzira uye kurudziro yeimwe tsvakiridzo yekuvandudza manzwisisiro eHEC mumasisitimu emvura.
Nguva yekutumira: Zvita-05-2023