Thickerer abu ne na gama-gari kuma wanda aka fi amfani da shi na tushen ruwa a cikin suturar tushen ruwa.Bayan ƙara wani thickener, zai iya ƙara danko na rufi tsarin, game da shi ya hana in mun gwada m abubuwa a cikin shafi daga daidaitawa.Ba za a sami wani abu mai banƙyama ba saboda ɗankowar fentin yana da siriri sosai.Akwai nau'ikan samfuran thickener da yawa, kuma nau'ikan samfuran daban-daban suna da ka'idodin kauri daban-daban don tsarin sutura daban-daban.Akwai nau'ikan ƙwayoyin cuta huɗu na yau da kullun: Thyurethane Thickeners, acrylic thickeer na acryrica, thicsic thickke da thickanic Thickkeers da thickanic Thickkeers da thckeic don selulose thickuloers.
1. Thickening inji na associative polyurethane thickener
Siffofin tsarin na polyurethane associative thickeners ne lipophilic, hydrophilic da lipophilic tri-block polymers, tare da lipophilic karshen kungiyoyin a duka iyakar, yawanci aliphatic hydrocarbon kungiyoyin, da ruwa mai narkewa polyethylene glycol kashi a tsakiya.Muddin akwai isasshen adadin kauri a cikin tsarin, tsarin zai samar da tsarin cibiyar sadarwa gaba ɗaya.
A cikin tsarin ruwa, lokacin da maida hankali mai girma ya fi girma fiye da mahimmancin micelle mai mahimmanci, ƙungiyoyin ƙarshen lipophilic suna haɗuwa don samar da micelles, kuma mai girma ya samar da tsarin hanyar sadarwa ta hanyar haɗin gwiwar micelles don ƙara yawan danko na tsarin.
A cikin tsarin latex, thickener ba zai iya samar da ƙungiya kawai ta hanyar lipophilic m group micelles, amma mafi mahimmanci, lipophilic m rukuni na thickener an adsorbed a saman latex barbashi.Lokacin da ƙungiyoyin ƙarshen lipophilic guda biyu ke tallatawa akan barbashi na latex daban-daban, ƙwayoyin kauri suna samar da gadoji tsakanin barbashi.
2. Thickening inji na polyacrylic acid alkali kumburi thickener
Polyacrylic acid alkali kumburi thickener ne giciye-linked copolymer emulsion, da copolymer wanzu a cikin nau'i na acid da kuma sosai kananan barbashi, bayyanar ne milky fari, danko ne in mun gwada da low, kuma yana da kyau kwanciyar hankali a low pH jima'i, kuma insoluble. cikin ruwa.Lokacin da aka ƙara wakili na alkaline, yana jujjuyawa zuwa fili kuma mai saurin kumbura.
A thickening sakamako na polyacrylic acid alkali kumburi thickener aka samar da neutralizing da carboxylic acid kungiyar da hydroxide;lokacin da aka ƙara wakili na alkali, ƙungiyar carboxylic acid wanda ba a sauƙaƙe ionized nan da nan ya zama ionized ammonium carboxylate ko karfe A cikin nau'i na gishiri, ana haifar da sakamako na repulsion na electrostatic tare da cibiyar anion na sarkar copolymer macromolecular, don haka giciye. sarkar macromolecular -linked copolymer macromolecular yana faɗaɗa kuma yana mikewa cikin sauri.Sakamakon rushewar gida da kumburi, ƙwayar asali ta ninka sau da yawa kuma danko yana ƙaruwa sosai.Tunda ba za a iya narkar da hanyoyin haɗin kai ba, ana iya ɗaukar copolymer a cikin nau'in gishiri azaman tarwatsawar copolymer wanda barbashi suna girma sosai.
Polyacrylic acid thickeners suna da tasiri mai kyau na kauri, saurin saurin girma, da kwanciyar hankali na ilimin halitta, amma suna kula da pH, rashin ƙarfi na ruwa, da ƙananan sheki.
3. Thickening inji na inorganic thickeners
Inorganic thickeners yafi hada da modified bentonite, attapulgite, da dai sauransu Inorganic thickeners da abũbuwan amfãni daga karfi thickeners, mai kyau thixotropy, m pH kewayon, kuma mai kyau kwanciyar hankali.Duk da haka, tun da bentonite foda ne na inorganic tare da kyakkyawan haske mai kyau, zai iya rage girman girman fuskar fim din kuma yayi aiki kamar matting wakili.Sabili da haka, lokacin amfani da bentonite a cikin fentin latex mai sheki, ya kamata a biya hankali ga sarrafa sashi.Nanotechnology ya gane nanoscale na inorganic barbashi, kuma ya ba da inorganic thickeners da wasu sababbin kaddarorin.
The thickening inji na inorganic thickeners ne in mun gwada da rikitarwa.An yi imani da cewa ƙin da ke tsakanin cajin ciki yana ƙara danko na fenti.Saboda rashin daidaituwarsa, yana rinjayar haske da kuma bayyana gaskiyar fim ɗin fenti.Ana amfani da shi gabaɗaya don fenti mai ƙima ko babban gini.
4. Tsarin kauri na cellulose thickener
Masu kauri na Cellulose suna da dogon tarihin ci gaba kuma ana amfani da su sosai.Bisa ga tsarin kwayoyin su, an raba su zuwa hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxymethyl cellulose, carboxymethyl cellulose, da dai sauransu, wanda aka fi amfani da hydroxyethyl cellulose (HEC).
Tsarin kauri na cellulose thickener shine yafi yin amfani da babban sarkar hydrophobic akan tsarinsa don samar da haɗin gwiwar hydrogen tare da ruwa, kuma a lokaci guda yana hulɗa tare da sauran ƙungiyoyin polar akan tsarinsa don gina tsarin cibiyar sadarwa mai girma uku da haɓaka ƙarar rheological. na polymer., Ƙuntata sararin motsi na kyauta na polymer, don haka ƙara danko na sutura.Lokacin da aka yi amfani da karfi mai ƙarfi, tsarin cibiyar sadarwa mai girma uku ya lalace, haɗin hydrogen tsakanin kwayoyin halitta ya ɓace, kuma danko yana raguwa.Lokacin da aka cire karfi da karfi, an sake gina haɗin hydrogen, kuma an sake gina tsarin cibiyar sadarwa mai girma uku, don haka tabbatar da cewa rufin zai iya samun kyawawan kaddarorin.rheological Properties.
Cellulosic thickeners ne mai arziki a cikin hydroxyl kungiyoyin da hydrophobic segments a cikin tsarin.Suna da inganci mai girma kuma ba su kula da pH.Duk da haka, saboda rashin juriya na ruwa da kuma tasiri ga matakin fenti, suna da sauƙi Sakamakon lalacewa ta hanyar ƙananan ƙwayoyin cuta da sauran gazawar, ana amfani da thickeners cellulose a zahiri don yin kauri na fenti.
A cikin aiwatar da shirye-shiryen sutura, zaɓin thickener yakamata yayi la'akari da dalilai da yawa, kamar dacewa da tsarin, danko, kwanciyar hankali na ajiya, aikin gini, farashi da sauran abubuwan.Ana iya haɗa masu kauri da yawa kuma ana amfani da su don ba da cikakkiyar wasa ga fa'idodin kowane mai kauri, da kuma sarrafa farashi cikin hankali a ƙarƙashin yanayin gamsarwa.
Lokacin aikawa: Maris-02-2023