Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Modified graphene EPS particles, preparation method of mortar and modified graphene EPS mortar
The invention discloses a preparation method of modified graphene EPS (Expandable Polystyrene) particles. The method comprises the following steps: (1) mixing 5% by mass of sodium borohydride and 10% by mass of lamellar graphene, then mixing with 30% by mass of alkyl benzene sulfonic acid, and carrying out ice bath for 2 hours at a temperature of -10 DEG C; (2) mixing with 40% by mass ratio of hydrazine, and performing heating at a temperature of 100 DEG C; (3) mixing with a styrene monomer, and performing polymerizing to form polystyrene particles by adopting a suspension polymerization method; (4) carrying out polymerization foaming on the graphene modified polystyrene foam particles and 15% by mass ratio of n-pentane at 100 DEG C under normal pressure to obtain graphene modified polystyrene foam particles; and (5) heating, pressurizing and foaming the graphene modified polystyrene foamed particles to prepare 15-25kg/m<3> particles. The invention solves the problems that: traditional EPS thermal insulation mortar is relatively high in heat conductivity coefficient, insufficient in thermal insulation effect, relatively low in compression and breaking strength, relatively low in shrinkage and cracking resistance and the like.
本发明公开了一种改性石墨烯EPS颗粒的制备方法，(1)用质量占比为5％的硼氢化钠与质量占比为10％的片层石墨烯混合，再与质量占比为30％的烷基苯磺酸混合后冰浴，冰浴时间为2小时，温度为‑10℃；(2)与质量占比为40％的联氨混合，并在100℃条件下加热；(3)与苯乙烯单体混合，并采用悬浮聚合方法聚合成聚苯乙烯粒子；(4)与质量占比为15％的正戊烷在100℃常压下进行聚合发泡，得到石墨烯改性聚苯乙烯发泡粒子；(5)将石墨烯改性聚苯乙烯发泡粒子加温加压发泡制备成15‑25kg/m3的颗粒。本发明解决了传统EPS保温砂浆导热系数较高，保温隔热效果不够，抗压抗折强度、防收缩开裂性能较低等问题。
Modified graphene EPS particles, preparation method of mortar and modified graphene EPS mortar
The invention discloses a preparation method of modified graphene EPS (Expandable Polystyrene) particles. The method comprises the following steps: (1) mixing 5% by mass of sodium borohydride and 10% by mass of lamellar graphene, then mixing with 30% by mass of alkyl benzene sulfonic acid, and carrying out ice bath for 2 hours at a temperature of -10 DEG C; (2) mixing with 40% by mass ratio of hydrazine, and performing heating at a temperature of 100 DEG C; (3) mixing with a styrene monomer, and performing polymerizing to form polystyrene particles by adopting a suspension polymerization method; (4) carrying out polymerization foaming on the graphene modified polystyrene foam particles and 15% by mass ratio of n-pentane at 100 DEG C under normal pressure to obtain graphene modified polystyrene foam particles; and (5) heating, pressurizing and foaming the graphene modified polystyrene foamed particles to prepare 15-25kg/m<3> particles. The invention solves the problems that: traditional EPS thermal insulation mortar is relatively high in heat conductivity coefficient, insufficient in thermal insulation effect, relatively low in compression and breaking strength, relatively low in shrinkage and cracking resistance and the like.
本发明公开了一种改性石墨烯EPS颗粒的制备方法，(1)用质量占比为5％的硼氢化钠与质量占比为10％的片层石墨烯混合，再与质量占比为30％的烷基苯磺酸混合后冰浴，冰浴时间为2小时，温度为‑10℃；(2)与质量占比为40％的联氨混合，并在100℃条件下加热；(3)与苯乙烯单体混合，并采用悬浮聚合方法聚合成聚苯乙烯粒子；(4)与质量占比为15％的正戊烷在100℃常压下进行聚合发泡，得到石墨烯改性聚苯乙烯发泡粒子；(5)将石墨烯改性聚苯乙烯发泡粒子加温加压发泡制备成15‑25kg/m3的颗粒。本发明解决了传统EPS保温砂浆导热系数较高，保温隔热效果不够，抗压抗折强度、防收缩开裂性能较低等问题。
Modified graphene EPS particles, preparation method of mortar and modified graphene EPS mortar
改性石墨烯EPS颗粒、砂浆的制备方法及改性石墨烯EPS砂浆
XI FEIFEI (Autor:in) / LI CHANGZHOU (Autor:in) / XIAO DAHAI (Autor:in)
21.09.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
C08J
Verarbeitung
,
WORKING-UP
/
C04B
Kalk
,
LIME
/
C08K
Verwendung von anorganischen oder nichtmakromolekularen organischen Stoffen als Zusatzstoffe
,
USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS
/
C08L
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
,
Massen auf Basis makromolekularer Verbindungen
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