Zuva Rokutumira:17,JAN,2022

Siliconedefoameris a white viscous emulsion. Yakashandiswa munzvimbo dzakasiyana siyana dzeindasitiri kubva kuma1960, asi hukuru-hukuru uye hwakakwana kukurumidza kusimudzira kwakatanga muma1980s. Sezvo organosilicondefoamer, minda yekushandiswa kwayo zvakare yakakura kwazvo, ichikwezva kutarisisa kwakawanda kubva kumarudzi ese ehupenyu. Muchikamu chemakemikari, bepa, kupeta, chikafu, machira, mishonga uye mamwe maindasitiri, siliconedefoamerchinhu chinodiwa chekuwedzera mukugadzira maitiro. Iyo haigone chete kubvisa furo pamusoro pemvura yepakati peiyo process process mukugadzira, nekudaro ichivandudza kusefa, Iyo kupatsanurwa, gasification, uye yemvura yemvura mhedzisiro yekugeza, kudhirowa, distillation, evaporation, kupera mvura mumuviri, kuomesa uye mamwe maitiro etekinoroji anovimbisa. kugona kwezvinhu zvakasiyana-siyana zvekuchengetedza uye kugadzirisa midziyo.

Zvakanakira zvesilicone defoamers:
1. Yakasiyana-siyana yekushandiswa: nekuda kwechimiro chemakemikari yakakosha yesilicone oiri, haienderane nemvura kana zvinhu zvine mapoka epolar, kana nemahydrocarboni kana organic zvinhu zvine mapoka ehydrocarbon. Nekuda kwekusagadzikana kwemafuta esilicone kune akasiyana zvinhu, ine huwandu hwakawanda hwekushandisa. Inogona kushandiswa kuburitsa furo mumasisitimu emvura pamwe neoiri masisitimu.
2. Low surface tension: The surface capacity of silicone oil inowanzoita 20-21 dyne/cm, iyo idiki pane yemvura (72 dyne/cm) uye zvinwiwa zvinopupuma furo, uye zvine mashandiro akanaka ekubvisa furo.
3. Kugadzikana kwakanaka kwekushisa: Kutora simethicone inowanzoshandiswa semuenzaniso, inogona kumira 150 ° C kwenguva yakareba uye 300 ° C kwenguva pfupi, uye chisungo chayo cheSi-O hachizoparari. Izvi zvinovimbisa kutisilicone defoamerinogona kushandiswa munzvimbo yakakura yekushisa.
4. Kugadzikana kwakanaka kwemakemikari: Sezvo chisungo cheSi-O chisina kugadzikana, kugadzikana kwemakemikari e-silicone mafuta akakwirira kwazvo, uye zvakaoma kuita zvemakemikari nezvimwe zvinhu. Naizvozvo, chero bedzi kuumbwa kwacho kuchine musoro,silicone defoamersinobvumirwa kushandiswa muzvirongwa zvine acids, alkalis, uye munyu.
5. Physiologically inert: Mafuta eSilicone akave akaratidzwa kuti haana-chepfu kuvanhu nemhuka, uye hafu-inouraya dose yakakura kudarika 34 g / kg. Naizvozvo,silicone defoamers(ine akakodzera asiri-chepfu emulsifiers, nezvimwewo) inogona kushandiswa zvakachengeteka mumaindasitiri ezvekudya, ekurapa, emishonga uye ekuzora.
6. Simba rekubvisa furo rakasimba:Silicone defoamerhaigoni kungoputsa furo rakagadzirwa, asi rinogona kuvharidzira zvakanyanya furo uye kudzivirira kuumbwa kwefuro. Kushandiswa kwayo kudiki kwazvo, sekunge uchiwedzera chikamu chimwe pamiriyoni (1ppm) yehuremu hwemhepo inopupuma, inogona kuburitsa mhedzisiro. Yayo inowanzoshandiswa siyana ndeye 1 kusvika ku100 ppm. Haisi mari chete yakaderera, asiwo haisvibise chinhu chakasvibiswa.

Zvakaipa zvesilicone defoamers:
a. Polysiloxane yakaoma kuparadzira: Polysiloxane yakaoma kunyungudika mumvura, iyo inodzivisa kupararira kwayo mumvura. A dispersing agent inofanira kuwedzerwa. Kana iyo yekuparadzira ichiwedzerwa, iyo emulsion ichave yakagadzikana uye iyo defoaming mhedzisiro ichachinja. Murombo, zvinodikanwa kushandisa shoma emulsifier kuita defoaming mhedzisiro yakanaka uye emulsion yakasimba.
b. Silicone inonyungudika neoiri, iyo inoderedza kusvibisa kwayo muoiri system.
c. Kureba kwepamusoro tembiricha kuramba uye kushomeka alkali kuramba.