Focus on Cellulose ethers

Introduction o Hydroxypropyl methyl cellulose HPMC

1. Tirohanga

Ko te Hydroxypropyl Methyl Cellulose (HPMC) he etera cellulose kore-ionic i hangaia mai i te papanga polymer taiao - te cellulose na roto i te raupapa o nga tukanga matū. Ko te Hydroxypropyl methylcellulose (HPMC) he paura karekau, he reka, he kore-paitini, ka taea te rewa i roto i te wai matao hei hanga i te otinga kikorangi marama, kei a ia nga mahi o te whakapakeke, te honohono, te whakamarara, te whakaemulsifying, te hanga kiriata, me te whakatārewatanga, te whakaurunga, te wetewete, te ngohe o te mata, te pupuri makuku me nga taonga colloid tiaki.

Ka taea te whakamahi i te Hydroxypropyl methylcellulose (HPMC) ki nga taonga hanga whare, paninga, kapia waihanga, karaima, rongoa, kai, kakano, ahuwhenua, whakapaipai me nga umanga tupeka
2、Whakaahua hua me te whakarōpūtanga Kua wehea nga hua ki te wai matao wairewa momo S me te momo noa
Whakatakotoranga noa oHydroxypropyl Methyl Cellulose

hua

MC

HPMC

E

F

J

K

Methoxy

ihirangi(%)

27.0~32.0

28.0~30.0

27.0~30.0

16.5~20.0

19.0~24.0

 

Te tohu whakakapingaDS

1.7~1.9

1.7~1.9

1.8~2.0

1.1~1.6

1.1~1.6

Hydroxypropoxy

ihirangi(%)

 

7.0~12.0

4~7.5

23.0~32.0

4.0~12.0

 

Te tohu whakakapingaDS

 

0.1~0.2

0.2~0.3

0.7~1.0

0.1~0.3

Makuku(Wt%)

≤5.0

pungarehu(Wt%)

≤1.0

Uara PH

5.0~8.5

Waho

te paura miraka ma te paura kirikiri ma ranei

Te pai

80upoko

pokey(mPa.s)

tirohia te whakatakotoranga viscosity

 

 

Whakatakotoranga whakakitenga

Whakatakotoranga

Awhe pokey(mpa.s)

Whakatakotoranga

Awhe pokey(mpa.s)

5

3~9

8000

7000~9000

15

10~20

10000

9000~11000

25

20~30

20000

15000~25000

50

40~60

40000

35000~45000

100

80~120

60000

46000~65000

400

300~500

80000

66000~84000

800

700~900

100000

85000~120000

1500

1200~2000

150000

130000~180000

4000

3500~4500

200000

≥180000

3ahua hua

Āhuatanga: Ko tenei hua he paura ma, he ma-ma ranei, he hongi, he reka me tekore-paitini.

Te wairewa wai me te kaha whakakaha: Ka taea te rewa tenei hua ki te wai matao hei hanga i te wairewa puataata.

Te whakakore i roto i nga whakarewa pararopi: Na te mea kei roto etahi roopu methoxyl hydrophobic, ka taea te whakakore i tenei hua ki etahi whakarewa pararopi, ka taea hoki te rewa i roto i nga whakarewa i konatunatua ki te wai me te mea pararopi.

Te ātete ki te tote: I te mea he polymer kore-katote tenei hua, he ahua pumau i roto i nga wairewa wai o nga tote whakarewa me nga electrolytes waro.

Mahi mata: Ko te wairewa wai o tenei hua he mahi mata, he mahi me nga ahuatanga penei i te whakaemulsification, te colloid whakamarumaru me te pumau.

Te waiariki waiariki: Ina whakamahana te wairewa wai o tenei hua ki tetahi pāmahana, ka puataata tae noa ki te hanga i te ahua (poly) kapoipoi, kia ngaro te pokey o te otinga. Engari i muri i te whakamatao, ka huri ano ki te ahua otinga taketake. Ko te pāmahana e puta ai te whakaweratanga ka whakawhirinaki ki te momo hua, te kukū o te otinga me te tere o te whakamahana.

PH pūmautanga: Ko te viscosity o te wairewa wai o tenei hua kei roto i te awhe o PH3.0-11.0.

Te whakapumau wai: I te mea he hydrophilic tenei hua, ka taea te taapiri atu ki te kumete, ki te gypsum, ki te peita, me etahi atu hei pupuri i te kaha pupuri wai i roto i te hua.

Te pupuri i te ahua: Ka whakatauritea ki etahi atu polymers wairewa-wai, ko te wairewa wai o tenei hua he ahuatanga viscoelastic motuhake. Ko tana taapiri he kaha ki te pupuri i te ahua o nga hua kirikiri kua whakakorehia kia kore e rereke.

Te whakahinuhinu: Ko te taapiri i tenei hua ka taea te whakaiti i te whakarea waku me te whakapai ake i te whakahinuhinu o nga hua uku me nga hua ciment.

Nga taonga hanga kiriata: Ka taea e tenei hua te hanga i tetahi kiriata ngawari, maramara me nga taonga miihini pai, he pai te hinu me te ngako.

4. Ngā āhuatanga ā-tinana me te matū

Rahi matūriki: 100 te reiti whakawhiti mata he nui ake i te 98.5%, 80 te reiti whakawhiti mata he 100%

Te pāmahana waro: 280~300 ℃

Kiato ahua: 0.25~0.70/cm te taumaha motuhake 1.26~1.31

Te wera o te tae: 190~200 ℃

Te mānukanuka mata: 2% wairewa wai ko 42~56dyn/cm

Wairewa: Ka whakarewahia ki te wai me etahi whakarewa, he mahi mata te wairewa wai. Puataata teitei. Mahinga pumau, ka huri te memehatanga me te pokey, te iti o te pokey, te nui ake o te wairewa.

Kei a HPMC ano nga ahuatanga o te kaha o te whakapaoho, te tote tote, te pumau o te PH, te pupuri wai, te pumau o te ahua, te tino pai o te hanga kiriata, me te whānuitanga o te aukati i te whaariki, te whakamararatanga me te whakakotahitanga.

5, te kaupapa matua

Ko te HPMC te nuinga o nga waahanga ahumahi e whakamahia ana hei dispersant i roto i te hanga o te polyvinyl chloride, a ko ia te kaihoko awhina matua mo te whakarite i te PVC ma te whakakore i te polymerization. I tua atu, ka taea te whakamahi hei whakamaroke, hei whakapumau, hei emulsifier, hei awhina, hei pupuri i te wai i roto i te hanga o etahi atu petrochemicals, paninga, taonga hanga whare, tango peita, matū ahuwhenua, waituhi, tuhinga kakano me te tae, karaima, pepa. , Paku, me etahi atu, kaihoko hanga kiriata, aha atu. Ko te tono i roto i nga kapia waihanga ka taea e nga hua kua whiwhi i nga ahuatanga o nga matūriki auau me te wewete, te kaha o te kaha me te mahi tukatuka pai, na reira ka whakakapihia te gelatin me te waipiro polyvinyl hei dispersants.

E ono nga tikanga whakakore:

(1). Tangohia te nui o te wai wera, hoatu ki roto i te ipu ka whakamahana ki runga ake i te 80°C, me te whakauru i tenei hua i raro i te whakaoho puhoi. Ka rewa te cellulose ki runga i te mata wai i te tuatahi, engari ka marara haere ki te hanga i te puhu rite. I whakamataohia te otinga i te wa e korikori ana.

(2). Ko te tikanga, whakamahanahia te 1/3, te 2/3 ranei o te wai wera ki runga ake i te 85°C, tāpirihia te cellulose kia whiwhi ai he slurry wai wera, kātahi ka tāpirihia te toenga o te wai matao, whakaohokia tonu, ka whakamatao i te ranunga hua.

(3). He tino pai te mata o te cellulose, he matūriki iti takitahi i roto i te paura whakakorikori rite, a ka rewa tere ina tutaki ki te wai hei hanga i te pokey e hiahiatia ana.

(4). Me ata me te taurite te taapiri i te cellulose ki te pāmahana rūma, me te whakaoho tonu kia puta mai he otinga maramara.


Wā tuku: Hānuere-11-2023
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