Zogulitsa zathu zazikulu: Amino silikoni, silikoni yotchinga, silikoni ya hydrophilic, emulsion yawo yonse ya silikoni, kunyowetsa kusisita kumathamanga, kuthamangitsa madzi (Fluorine free, Carbon 6, Carbon 8), mankhwala ochapira a demin (ABS, Enzyme, Spandex protector, Manganese remover) , Maiko akuluakulu otumiza kunja: India, Pakistanrk, Bangladesh, Türkiye, Bangladesh, etc. Mandy +86 19856618619 (Whatsapp)
Mfundo, gulu, kusankha, ndi mlingo wa defoamers

Vuto la chithovu pochiza madzi lazunguza anthu ambiri. Pa gawo loyamba la kutumidwa, thovu, surfactant thovu, zotsatira thovu, peroxide thovu, thovu kwaiye ndi kuwonjezera sanali oxidizing bactericide pa kufalitsidwa madzi mankhwala, etc., kotero ntchito defoamer madzi mankhwala ndi wamba. Nkhaniyi ikufotokoza momveka bwino mfundo, magulu, kusankha ndi mlingo wa defoamer!

★ Kuchotsa thovu
1. Njira zakuthupi

Kuchokera ku thupi, njira zochotsera thovu makamaka zimaphatikizapo kuyika baffle kapena fyuluta chophimba, makina mukubwadamuka, static magetsi, kuzizira, Kutentha, nthunzi, ray walitsa, mkulu-liwiro centrifugation, kuchepetsa kuthamanga, mkulu-pafupipafupi kugwedera, pompopompo kutulutsa ndi akupanga (acoustic madzi control). Njira zonsezi zimalimbikitsa kufala kwa mpweya pa malekezero onse a filimu yamadzimadzi ndi kutulutsa kwamadzimadzi kwa filimu yamoto kumadera osiyanasiyana, kupangitsa kuti chithovu chikhale chokhazikika kusiyana ndi kuchepetsa kuchepetsa, kuti chiwerengero cha chithovu chichepetse pang'onopang'ono. Komabe, choyipa chofala cha njirazi ndikuti amakakamizidwa kwambiri ndi zinthu zachilengedwe ndipo amakhala ndi chiwopsezo chochepa. Ubwino wake ndi kuteteza chilengedwe komanso kuchuluka kwakugwiritsanso ntchito.

2. Njira zamakina

Njira zamakina zochotsera thovu makamaka zimaphatikizapo njira yamankhwala komanso kuwonjezera defoamer.

Njira yamankhwala imatanthawuza zomwe zimachitika pakati pa chinthu chomwe chimatulutsa thovu ndi chotulutsa thovu powonjezera zinthu zina zopangira madzi osasungunuka, motero kuchepetsa kuchuluka kwa surfactant mufilimu yamadzimadzi ndikulimbikitsa kuphulika kwa thovu. Komabe, njirayi ili ndi zofooka zina, monga kusatsimikizika kwa zinthu zomwe zimatulutsa thovu komanso kuvulaza kwa zinthu zosasungunuka ku zida zadongosolo. Njira yomwe imagwiritsidwa ntchito kwambiri m'mafakitale osiyanasiyana masiku ano ndiyo kuwonjezera ma defoamers. Ubwino waukulu wa njirayi ndikuchita bwino kwambiri kwa defoaming komanso kugwiritsa ntchito mosavuta. Komabe, kupeza defoamer yoyenera ndi yothandiza ndiye chinsinsi.

★Mfundo yochotsa thovu

Ma defoamers, omwe amadziwikanso kuti defoamers, ali ndi mfundo zotsatirazi:

1. Njira yochepetsera kupsinjika kwa thovu komwe kumatsogolera kuphulika kwa thovu ndikuti ma alcohols apamwamba kapena mafuta amasamba amawaza pa thovu, ndipo akasungunuka kukhala chithovu chamadzimadzi, kupsinjika kwapamwamba kumachepetsedwa kwambiri. Chifukwa chakuti zinthuzi nthawi zambiri zimakhala ndi kusungunuka kochepa m'madzi, kuchepetsa kugwedezeka kwapamtunda kumangokhala mbali ya chithovu chapafupi, pamene kugwedezeka kwa pamwamba pa chithovu sikungasinthe. Gawo lomwe lili ndi kupsinjika kocheperako limakokedwa mwamphamvu ndikukulitsidwa mbali zonse, ndipo pamapeto pake limasweka.

2. The chiwonongeko cha nembanemba elasticity kumabweretsa kuwira kuswa defoamer anawonjezera ku chithovu dongosolo, amene diffuse kwa mawonekedwe mpweya-zamadzimadzi, kupangitsa kukhala kovuta kwa surfactant ndi thovu stabilizing tingati achire elasticity nembanemba.

3. Defoamers amene amalimbikitsa madzi filimu ngalande akhoza kulimbikitsa madzi filimu ngalande, motero kuchititsa thovu kuphulika. Kuchuluka kwa madzi a thovu kumatha kuwonetsa kukhazikika kwa thovu. Kuonjezerapo chinthu chomwe chimafulumizitsa ngalande za thovu kungathandizenso kuti anthu awonongeke.

4. Kuwonjezera hydrophobic olimba particles kungachititse thovu kuphulika pamwamba pa thovu. Hydrophobic olimba particles kukopa hydrophobic mapeto a surfactant, kupanga hydrophobic particles hydrophilic ndi kulowa madzi gawo, potero amasewera mbali defoaming.

5. Solubilizing ndi thovu surfactants kungachititse thovu kuphulika. Ena otsika maselo kulemera zinthu kuti akhoza mokwanira kusakaniza ndi yankho akhoza solubilize ndi surfactant ndi kuchepetsa ake ogwira ndende. Low maselo zinthu motere, monga octanol, Mowa, propanol ndi mowa zina, sangathe kuchepetsa surfactant ndende pamwamba wosanjikiza, komanso kupasuka mu surfactant adsorption wosanjikiza, kuchepetsa compactness wa mamolekyu surfactant, motero kufooketsa bata la thovu.

6.Electrolyte kuwonongeka surfactant iwiri wosanjikiza magetsi amasewera defoaming udindo mu mogwirizana surfactant iwiri wosanjikiza magetsi ndi thovu kubala khola thobvu madzi. Kuwonjezera electrolyte wamba akhoza kugwetsa surfactant iwiri wosanjikiza magetsi.

★ Gulu la ma defoamers

Ma defoamers omwe amagwiritsidwa ntchito kwambiri amatha kugawidwa kukhala silicone (resin), surfactant, alkane, ndi mafuta amchere molingana ndi kapangidwe kawo.

1. Silicone (resin) defoamers, omwe amadziwikanso kuti emulsion defoamers, amagwiritsidwa ntchito ndi emulsifying ndi kufalitsa utomoni wa silikoni ndi emulsifiers (ma surfactants) m'madzi asanawonjezeke kumadzi onyansa. Silicon dioxide ufa wabwino ndi mtundu wina wa silicon-based defoamer wokhala ndi zotsatira zabwino zowononga.

2. surfactants wotere defoamers kwenikweni emulsifiers, ndiko kuti, ntchito kubalalitsidwa kwa surfactants kusunga thovu kupanga zinthu mu khola emulsified boma m'madzi, kuti kupewa mapangidwe thovu.

3. Alkane based defoamers ndi defoamers opangidwa ndi emulsifying ndi dilafini sera kapena zotumphukira zake ntchito emulsifiers. Kugwiritsiridwa ntchito kwawo kuli kofanana ndi kwa surfactant based emulsifying defoamers.

4.Mineral mafuta ndi chigawo chachikulu defoaming. Kuti izi zitheke, nthawi zina sopo wachitsulo, mafuta a silicone, silika ndi zinthu zina zimasakanizidwa kuti zigwiritsidwe ntchito. Kuphatikiza apo, ma surfactants osiyanasiyana amatha kuwonjezeredwa nthawi zina kuti athandizire kufalikira kwa mafuta amchere pamwamba pa njira yotulutsa thovu kapena kugawanitsa mofanana sopo zachitsulo ndi zinthu zina mumafuta amchere.
★ Ubwino ndi kuipa kwa mitundu yosiyanasiyana ya defoamers

Kafukufuku ndi kugwiritsa ntchito ma organic defoamers monga mafuta amchere, ma amides, ma alcohols otsika, mafuta acids ndi mafuta acid esters, phosphate esters, etc. ndi oyambilira ndipo ndi a m'badwo woyamba wa defoamers. Iwo ali ndi ubwino wa kupezeka mosavuta kwa zipangizo, mkulu ntchito zachilengedwe, ndi otsika mtengo kupanga; Zoyipa zake ndi kutsika kwamphamvu kwa defoaming, kukhazikika kwamphamvu, komanso kugwiritsa ntchito mwankhanza.

Ma polyether defoamers ndi a m'badwo wachiwiri, makamaka kuphatikiza ma polyether owongoka, ma polyether kuyambira ku mowa kapena ammonia, ndi zotumphukira za polyether zokhala ndi esterification yamagulu omaliza. Ubwino waukulu wa polyether defoamers ndi mphamvu zawo zotsutsa thovu. Kuphatikiza apo, ma polyether defoamers amakhalanso ndi zinthu zabwino kwambiri monga kukana kutentha kwambiri, asidi amphamvu ndi kukana kwa alkali; Zoyipa zake ndizochepa chifukwa cha kutentha, madera ocheperako, kusakhoza kutulutsa thovu, komanso kusweka kwa kuphulika.

Organic silicone defoamers (m'badwo wachitatu defoamers) ali ndi mphamvu yofooketsa mphamvu, kutulutsa thovu mwachangu, kusasunthika pang'ono, kusakhala ndi chiwopsezo cha chilengedwe, palibe inertia yakuthupi, komanso ntchito zosiyanasiyana. Chifukwa chake, ali ndi mwayi wogwiritsa ntchito kwambiri komanso kuthekera kwakukulu kwa msika, koma magwiridwe antchito awo ndi otsika.

Polyether modified polysiloxane defoamer imaphatikiza zabwino zonse za polyether defoamers ndi organosilicon defoamers, ndipo ndi njira yopangira ma defoamers. Nthawi zina amatha kugwiritsidwanso ntchito kutengera kusungunuka kwake, koma pakali pano pali mitundu yochepa ya zofooketsa zotere ndipo zikadali mugawo la kafukufuku ndi chitukuko, zomwe zimapangitsa kuti pakhale ndalama zambiri zopangira.

★ Kusankhidwa kwa ma defoamers

Kusankhidwa kwa defoamers kuyenera kukwaniritsa izi:

1. Ngati sichisungunuka kapena sichisungunuka mu njira yotulutsa thovu, imaphwanya thovu. The defoamer ayenera kukhazikika pa filimu chithovu. Kwa ma defoamers, amayenera kukhazikika ndikukhazikika pang'onopang'ono, pomwe opondereza chithovu, ayenera kusungidwa m'malo awa nthawi zonse. Chifukwa chake ma defoams ali muzambiri zamadzimadzi zomwe zimatulutsa thovu, ndipo zosasungunuka zokha kapena zosasungunuka bwino zomwe zimafika pofika ku supersaturation. Insoluble kapena zovuta kupasuka, n'zosavuta aggregate pa mawonekedwe gasi-zamadzimadzi, zosavuta kuika maganizo pa kuwira nembanemba, ndipo akhoza kugwira ntchito m'munsi woipa. Defoamer yomwe imagwiritsidwa ntchito m'makina amadzi, mamolekyu ogwiritsira ntchito, ayenera kukhala amphamvu kwambiri a hydrophobic ndi ofooka a hydrophilic, ndi mtengo wa HLB mumtundu wa 1.5-3 kuti ukhale wabwino.

2. Kuthamanga kwapamtunda kumakhala kochepa kusiyana ndi madzi otsekemera, ndipo pokhapokha mphamvu za intermolecular za defoamer zimakhala zazing'ono ndipo kugwedezeka kwapansi kumakhala kotsika kusiyana ndi kutulutsa thovu, tinthu tating'onoting'ono ta defoamer tingalowe ndikukulitsa filimuyi. Ndikoyenera kudziwa kuti kugwedezeka kwapamwamba kwa njira yotulutsa thobvu si kugwedezeka kwapamtunda kwa yankho, koma kugwedezeka kwapamtunda kwa yankho la thovu.

3. Pali kuyanjana kwamadzi ndi thovu. Monga momwe defoaming ndondomeko kwenikweni mpikisano pakati thovu kugwa liwiro ndi thovu m'badwo liwiro, ndi defoamer ayenera kutha msanga kumwazikana mu thovu madzi kuti mwamsanga kutenga mbali mu osiyanasiyana thovu madzi. Kuti defoamer ifalikire mwachangu, chogwiritsira ntchito cha defoamer chiyenera kukhala ndi gawo lina la kuyanjana ndi yankho la thovu. Zomwe zimagwira ntchito za defoamers zili pafupi kwambiri ndi zakumwa zotulutsa thovu ndipo zidzasungunuka; Ochepa kwambiri komanso ovuta kuwabalalitsa. Pokhapokha pamene kuyandikana kuli koyenera m'pamene kuchitapo kanthu kungakhale kwabwino.

4. Ma defoams samakumana ndi zinthu zamadzimadzi zotulutsa thovu. Ma defoams akachita ndi zakumwa zotulutsa thovu, amasiya kugwira ntchito ndipo amatha kupanga zinthu zovulaza zomwe zimakhudza kukula kwa tizilombo.

5.Kusasunthika kochepa komanso nthawi yayitali yochitapo kanthu. Choyamba, ndikofunikira kudziwa ngati njira yomwe imafuna kugwiritsa ntchito ma defoamers ndi madzi kapena mafuta. Popanga fermentation, ma defoam opangidwa ndi mafuta monga polyether modified silicone kapena polyether based based ayenera kugwiritsidwa ntchito. Makampani okutira opangidwa ndi madzi amafunikira ma defoam opangidwa ndi madzi ndi ma organic silicon defoamers. Sankhani defoamer, yerekezerani ndalama zomwe zawonjezeredwa, ndipo kutengera mtengo wamawu, pezani chinthu choyenera kwambiri komanso chachuma cha defoamer.

★Zomwe zikukhudza kagwiritsidwe ntchito ka defoamer

1. The dispersibility ndi pamwamba katundu defoamers mu njira kwambiri zimakhudza ena defoaming katundu. Ma defoams ayenera kukhala ndi mulingo woyenera wa kubalalitsidwa, ndipo tinthu tating'onoting'ono kwambiri kapena tochepa kwambiri mu kukula tingasokoneze ntchito yawo yotulutsa thovu.

2. Kugwirizana kwa defoamer mu thovu dongosolo Pamene surfactant kwathunthu kusungunuka mu amadzimadzi njira, nthawi zambiri directionally anakonza pa mawonekedwe a mpweya-zamadzimadzi a thovu kukhazikika thovu. Pamene surfactant ali mu insoluble kapena supersaturated boma, ndi particles kumwazikana mu njira ndi kudziunjikira pa thovu, ndi thovu amachita ngati defoamer.

3. Kutentha kozungulira kwa makina otulutsa thovu ndi kutentha kwa madzi otsekemera kungakhudzenso ntchito ya defoamer. Kutentha kwamadzimadzi otulutsa thovu pawokha kumakhala kokwera kwambiri, tikulimbikitsidwa kugwiritsa ntchito defoamer yapadera yolimbana ndi kutentha kwambiri, chifukwa ngati defoamer wamba itagwiritsidwa ntchito, kutsitsa kumatha kuchepetsedwa kwambiri, ndipo defoamer imachotsa mafuta odzola mwachindunji.

4. Kupaka, kusungirako, ndi mayendedwe a defoamers ndi oyenera kusungidwa pa 5-35 ℃, ndipo nthawi ya alumali nthawi zambiri imakhala miyezi 6. Osachiyika pafupi ndi gwero la kutentha kapena kuchiyika padzuwa. Malinga ndi njira zomwe zimagwiritsidwa ntchito nthawi zambiri zosungiramo mankhwala, onetsetsani kuti mwasindikiza mutatha kugwiritsa ntchito kuti zisawonongeke.

6.Chiwerengero chowonjezera cha defoamers ku yankho lapachiyambi ndi njira yowonongeka imakhala ndi kupotoza kwinakwake, ndipo chiwerengerocho sichifanana. Chifukwa cha kuchuluka kwa surfactant, mafuta otsekemera a defoamer ndi osakhazikika ndipo sangachedwe posachedwa. Kuchita kwa defoaming kumakhala kocheperako, komwe sikuli koyenera kusungidwa kwanthawi yayitali. Ndi bwino kugwiritsa ntchito mwamsanga pambuyo dilution. Gawo la defoamer lomwe lawonjezeredwa liyenera kutsimikiziridwa kudzera pakuyezetsa patsamba kuti muwone ngati likugwira ntchito, ndipo siliyenera kuwonjezeredwa mopitilira muyeso.

★Mlingo wa defoamer

Pali mitundu yambiri ya defoamers, ndipo mlingo wofunikira wa mitundu yosiyanasiyana ya defoamers umasiyana. Pansipa, tikuwonetsa kuchuluka kwa mitundu isanu ndi umodzi ya defoamers:

1. Defoamer ya mowa: Mukamagwiritsa ntchito zakumwa zoziziritsa kukhosi, mlingo nthawi zambiri umakhala mkati mwa 0.01-0.10%.

2. Mafuta a defoamers opangidwa ndi mafuta: Kuchuluka kwa mafuta opangidwa ndi mafuta omwe amawonjezeredwa ndi pakati pa 0.05-2%, ndipo kuchuluka kwa mafuta a ester defoamers omwe akuwonjezeredwa ndi pakati pa 0.002-0.2%.

3. Amide defoamers: Amide defoamers amakhala ndi zotsatira zabwino, ndipo ndalama zowonjezera zimakhala mkati mwa 0.002-0.005%.

4. Phosphoric acid defoamer: Phosphoric acid defoamers amagwiritsidwa ntchito kwambiri mu ulusi ndi mafuta opaka mafuta, ndi kuchuluka kwake pakati pa 0.025-0.25%.

5. Amine defoamer: Amine defoamers amagwiritsidwa ntchito makamaka pokonza fiber, ndi kuchuluka kwa 0.02-2%.

7.Ether based defoamers: Ether based defoamers amagwiritsidwa ntchito kwambiri posindikiza mapepala, utoto, ndi kuyeretsa, ndi mlingo wa 0.025-0.25%.