Kodi ndi zinthu ziti zomwe zimakhudza kuyatsa kwa hydroxypropyl methylcellulose?

Kuwala kwa hydroxypropyl methylcellulose kumakhudzidwa makamaka ndi mfundo izi:

1. Ubwino wa zipangizo.

Chachiwiri, zotsatira za alkalization.

3. Chiŵerengero cha ndondomeko

4. Gawo la zosungunulira

5. Zotsatira za neutralization

Zogulitsa zina zimakhala ndi mitambo ngati mkaka zitasungunuka, zina zimakhala zoyera ngati zamkaka, zina zimakhala zachikasu, zina zimamveka bwino komanso zimawonekera… Nthawi zina acetic acid imatha kukhudza kwambiri kufalikira kwa kuwala. Ndi bwino kugwiritsa ntchito asidi acetic pambuyo dilution. Chikoka chachikulu ndi chakuti zomwe zimakhudzidwa zimagwedezeka mofanana komanso ngati chiŵerengero cha dongosolo ndi chokhazikika (zina zimakhala ndi chinyezi ndipo zomwe zili ndi zosakhazikika, monga zosungunulira zomwe zimagwiritsidwa ntchito pobwezeretsanso). Ndipotu pali zinthu zambiri zimene zimakhudza. Ngati zidazo zili zokhazikika ndipo ogwira ntchito akuphunzitsidwa bwino, kupanga kuyenera kukhala kokhazikika. Kutumiza kwa kuwala sikudzapitirira kuchuluka kwa ± 2%, ndipo kufanana kwamagulu olowa m'malo kuyenera kuyendetsedwa bwino. M'malo mofanana, kuyatsa kopepuka kungakhale kwabwino.

Zomwe zimakhudza kukhuthala kwa hydroxypropyl methylcellulose:

High-viscosity hydroxypropyl methylcellulose sangatulutse mapadi okwera kwambiri pokhapokha pakupukuta ndikusintha nayitrogeni popanga. Nthawi zambiri, kupanga ma cellulose apamwamba kwambiri ku China sikungawongoleredwe. Komabe, ngati chida choyezera mpweya chitha kuyikidwa mu ketulo, kupanga mamasukidwe ake kutha kuwongoleredwa mwachinyengo.

zopangidwa. Kuphatikiza apo, poganizira kuthamanga kwa nayitrogeni m'malo mwake, ndikosavuta kupanga zinthu zowoneka bwino mosasamala kanthu kuti dongosololi ndi lopanda mpweya bwanji. Zachidziwikire, kuchuluka kwa polymerization ya thonje woyengedwa ndikofunikanso. Ngati izi sizikugwira ntchito, chitani ndi hydrophobic association. Pali othandizira othandizira mderali ku China. Ndi mtundu wanji wa othandizira omwe angasankhe ali ndi chikoka chachikulu pakuchita kwa chinthu chomaliza. Mpweya wotsalira wa okosijeni mu riyakitala umayambitsa kuwonongeka kwa cellulose ndi kuchepa kwa kulemera kwa maselo, koma mpweya wotsalirawo ndi wochepa, malinga ngati mamolekyu osweka akugwirizanitsanso, sizovuta kupanga kukhuthala kwakukulu. Komabe, kuchuluka kwa machulukidwe kumakhudzana kwambiri ndi zomwe zili mu hydroxypropyl. Mafakitale ena amangofuna kuchepetsa mtengo ndi mtengo, koma sakufuna kuwonjezera zomwe zili mu hydroxypropyl, kotero kuti khalidweli silingathe kufika pamlingo wazinthu zakunja zofanana. Mlingo wosungira madzi wa mankhwalawa uli ndi ubale wabwino kwambiri ndi hydroxypropyl, komanso umatsimikizira kuchuluka kwake kwa kusungirako madzi, zotsatira za alkalization, chiŵerengero cha methyl chloride ndi propylene oxide, ndende ya alkali ndi kuchuluka kwa kusungira madzi panjira yonseyi. Chiŵerengero cha thonje woyengedwa chimatsimikizira ntchito ya mankhwala.